{"id":33612,"date":"2023-10-16T08:24:13","date_gmt":"2023-10-22T03:47:13","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e5%9c%a8redis%e4%b8%8a%e8%bf%9b%e8%a1%8c%e4%ba%86%e5%bf%ab%e9%80%9f%e6%96%87%e4%bb%b6%e8%ae%bf%e9%97%ae%e7%9a%84%e6%b5%8b%e8%af%95%ef%bc%8c%e4%bd%bf%e7%94%a8%e4%ba%86google-colab%e6%9d%a5\/"},"modified":"2024-05-04T04:29:25","modified_gmt":"2024-05-03T20:29:25","slug":"%e6%88%91%e5%9c%a8redis%e4%b8%8a%e8%bf%9b%e8%a1%8c%e4%ba%86%e5%bf%ab%e9%80%9f%e6%96%87%e4%bb%b6%e8%ae%bf%e9%97%ae%e7%9a%84%e6%b5%8b%e8%af%95%ef%bc%8c%e4%bd%bf%e7%94%a8%e4%ba%86google-colab%e6%9d%a5","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e5%9c%a8redis%e4%b8%8a%e8%bf%9b%e8%a1%8c%e4%ba%86%e5%bf%ab%e9%80%9f%e6%96%87%e4%bb%b6%e8%ae%bf%e9%97%ae%e7%9a%84%e6%b5%8b%e8%af%95%ef%bc%8c%e4%bd%bf%e7%94%a8%e4%ba%86google-colab%e6%9d%a5\/","title":{"rendered":"\u6211\u5728Redis\u4e0a\u8fdb\u884c\u4e86\u5feb\u901f\u6587\u4ef6\u8bbf\u95ee\u7684\u6d4b\u8bd5\uff0c\u4f7f\u7528\u4e86Google Colab\u6765\u5c1d\u8bd5"},"content":{"rendered":"
\"Open<\/div>\n

\u6211\u5728Google Colab\u4e0a\u5c1d\u8bd5\u4e86\u4f7f\u7528Redis\u8fdb\u884c\u5feb\u901f\u6587\u4ef6\u8bbf\u95ee\u3002<\/h2>\n

\u5728Redis\u4e2d\uff0c\u6211\u65e0\u6cd5\u627e\u5230\u76f4\u63a5\u8bfb\u53d6\u73b0\u6709\u6587\u4ef6\u7684\u529f\u80fd\u3002\uff08\u53ef\u80fd\u662f\u6211\u89c1\u8bc6\u77ed\u6d45\uff0c\u5982\u679c\u60a8\u77e5\u9053\u7684\u8bdd\u8bf7\u544a\u8bc9\u6211\u3002\uff09\u56e0\u6b64\uff0c\u6211\u521b\u5efa\u4e86\u4e00\u4e2a\u6a21\u5757\uff0c\u901a\u8fc7mmap\u5c06\u5305\u542bdouble\u503c\u7684\u6587\u4ef6\u6620\u5c04\u5230\u5185\u5b58\u4e2d\uff0c\u5e76\u4ece\u6307\u5b9a\u4f4d\u7f6e\u8bfb\u53d6\u548c\u5199\u5165\u503c\u3002\u6211\u5728\u4ee3\u7801\u4e2d\u63d0\u4f9b\u4e86\u6240\u6709\u5185\u5bb9\uff0c\u60a8\u53ea\u9700\u4ece\u5de6\u4e0a\u89d2\u7684\u6309\u94ae\u6253\u5f00Colab\u5e76\u6309\u987a\u5e8f\u6267\u884c\u5355\u5143\u683c\u5373\u53ef\u8fdb\u884c\u6d4b\u8bd5\u3002\u4e5f\u8bf7\u5c06\u5176\u4f5c\u4e3a\u5236\u4f5cRedis\u6a21\u5757\u7684\u53c2\u8003\u65b9\u5f0f\u3002<\/p>\n

\u5982\u679c\u5b89\u88c5\u4e86\u8fd9\u4e2a\u6a21\u5757\uff0c\u5c31\u80fd\u5728Redis\u4e2d\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u3002<\/p>\n

\/\/ file_path\u306b\u3042\u308b\u30d5\u30a1\u30a4\u30eb\u3092key\u306b\u7d50\u3073\u3064\u3051\u308b\r\nMMAP key file_path\r\n\r\n\/\/ key\u304b\u3089index\u4f4d\u7f6e\u306b\u3042\u308b\u5024\u3092\u53d6\u5f97\u3059\u308b\r\nVGET key index\r\n\r\n\/\/ key\u304b\u3089\u8907\u6570\u306eindex\u4f4d\u7f6e\u306b\u3042\u308b\u5024\u3092\u53d6\u5f97\u3059\u308b\r\nVMGET key index [index ...]\r\n\r\n\/\/ key\u306eindex\u4f4d\u7f6e\u306b\u5024\u3092\u66f8\u304d\u8fbc\u3080\r\nVSET key index value [index value ...]\r\n\r\n\/\/ key\u306bvalue\u3092\u8ffd\u52a0\u3059\u308b\r\nVADD key value [value ...]\r\n\r\n\/\/ key\u306e\u6700\u5f8c\u306e\u5024\u3092\u53d6\u5f97\u3057\u3066\u524a\u9664\u3059\u308b\r\nVPOP key\r\n\r\n\/\/ key\u306e\u5024\u306e\u6570\u3092\u53d6\u5f97\u3059\u308b\r\nVSIZE key\r\n\r\n\/\/ key\u306e\u5185\u5bb9\u3092\u6d88\u53bb\u3059\u308b\r\nVCLEAR key\r\n<\/code><\/pre>\n
\u9996\u5148\u4eceRedis\u6e90\u4ee3\u7801\u4e2d\u83b7\u53d6\uff0c\u7136\u540e\u79fb\u52a8\u5230\u6a21\u5757\u7684\u76ee\u5f55\u4e2d\u3002<\/p>\n
%<\/span>cd<\/span> \/<\/span>content<\/span>\r\n!<\/span>wget<\/span> https<\/span>:<\/span>\/\/<\/span>download<\/span>.<\/span>redis<\/span>.<\/span>io<\/span>\/<\/span>redis<\/span>-<\/span>stable<\/span>.<\/span>tar<\/span>.<\/span>gz<\/span>\r\n!<\/span>tar<\/span> -<\/span>xzf<\/span> redis<\/span>-<\/span>stable<\/span>.<\/span>tar<\/span>.<\/span>gz<\/span>\r\n%<\/span>cd<\/span> \/<\/span>content<\/span>\/<\/span>redis<\/span>-<\/span>stable<\/span>\/<\/span>src<\/span>\/<\/span>modules<\/span>\r\n<\/code><\/pre>\n
\u8ba9\u6211\u4eec\u8bd5\u7740\u7f16\u8bd1\u4e00\u4e0b\u8fd9\u4e2a\u6837\u4f8b\u4ee3\u7801\u5427\u3002<\/p>\n
!<\/span>make<\/span>\r\n<\/code><\/pre>\n
\u6211\u4f1a\u786e\u8ba4\u6a21\u5757\u7684.so\u6587\u4ef6\u662f\u5426\u5df2\u521b\u5efa\u3002<\/p>\n
!<\/span>ls<\/span> *<\/span>.<\/span>so<\/span>\r\n<\/code><\/pre>\n
helloacl.so    hellocluster.so\thellohook.so   hellotype.so\r\nhelloblock.so  hellodict.so\thellotimer.so  helloworld.so\r\n<\/code><\/pre>\n
\u6211\u5011\u73fe\u5728\u4f86\u5bebfmmap.c\u7684\u4ee3\u78bc\u3002\u8b80\u5beb\u7684\u503c\u662fdouble\u578b\u7684\u3002\u70ba\u4e86\u8b93\u4ee3\u78bc\u66f4\u6613\u8b80\uff0c\u932f\u8aa4\u8655\u7406\u88ab\u7701\u7565\u4e86\u3002\u8acb\u6ce8\u610f\uff0c\u5982\u679c\u9032\u884c\u6e2c\u8a66\uff0c\u8acb\u4e0d\u8981\u8f38\u5165\u60e1\u610f\u6307\u4ee4?<\/p>\n
\u6b64\u5916\uff0c\u6211\u5011\u5728\u9019\u88e1\u516c\u958b\u7684\u7a0b\u5f0f\u78bc\u4e2d\uff0c\u53ef\u4ee5\u9078\u64c7\u8981\u8b80\u5beb\u7684\u503c\u7684\u985e\u578b\uff0c\u4e26\u4e14\u9084\u5177\u5099\u5b8c\u6574\u7684\u932f\u8aa4\u8655\u7406\u3002<\/p>\n
\u9996\u5148\u9700\u8981\u5305\u542b\u5fc5\u8981\u7684\u5934\u6587\u4ef6\u3002\u540c\u65f6\u4e5f\u5b9a\u4e49\u4e00\u4e9b\u65b9\u4fbf\u7684\u5b8f\u3002<\/p>\n
%%<\/span>writefile<\/span> fmmap<\/span>.<\/span>c<\/span>\r\n\r\n#pragma GCC diagnostic ignored \"-Wunused-parameter\"\r\n<\/span>\r\n#include <sys\/mman.h>\r\n#include <sys\/stat.h>\r\n#include <sys\/types.h>\r\n#include <fcntl.h>\r\n#include <unistd.h>\r\n#include <stdbool.h>\r\n#include <stdint.h>\r\n#include <strings.h>\r\n#include <string.h>\r\n<\/span>\r\n#include \"..\/redismodule.h\"\r\n#include \"..\/sds.h\"\r\n#include \"..\/zmalloc.h\"\r\n<\/span>\r\n\/\/<\/span> (<\/span>RedisModuleString<\/span> *<\/span>)<\/span>\u3068<\/span>(<\/span>char<\/span> *<\/span>)<\/span>\u3092\u6bd4\u8f03\u3059\u308b\u30de\u30af\u30ed<\/span>\r\nstatic<\/span> inline<\/span> int<\/span> mstringcmp<\/span>(<\/span>const<\/span> RedisModuleString<\/span> *<\/span>rs1<\/span>,<\/span> const<\/span> char<\/span> *<\/span>s2<\/span>)<\/span>\r\n{<\/span>\r\n  return<\/span> strcasecmp<\/span>(<\/span>RedisModule_StringPtrLen<\/span>(<\/span>rs1<\/span>,<\/span> NULL<\/span>),<\/span> s2<\/span>);<\/span>\r\n}<\/span>\r\n\r\nint<\/span> ftruncate<\/span>(<\/span>int<\/span> fildes<\/span>,<\/span> off_t<\/span> length<\/span>);<\/span> \/\/<\/span> unistd<\/span>.<\/span>h\u306b\u3042\u308b\u306f\u305a\u3060\u304cwarning\u304c\u51fa\u308b\u306e\u3067<\/span>\r\n<\/code><\/pre>\n
\u5b9a\u4e49MMapObject\u3002\u586b\u5165\u4e86mmap\u6240\u9700\u7684\u4fe1\u606f\u3002sds\u662fRedis\u5185\u90e8\u4f7f\u7528\u7684\u5b57\u7b26\u4e32\u7c7b\u578b\u3002<\/p>\n
%%<\/span>writefile<\/span> -<\/span>a<\/span> fmmap<\/span>.<\/span>c<\/span>\r\n\r\ntypedef<\/span> struct<\/span> _MMapObject<\/span>\r\n{<\/span>\r\n  sds<\/span> file_path<\/span>;<\/span>\r\n  int<\/span> fd<\/span>;<\/span>\r\n  void<\/span> *<\/span>mmap<\/span>;<\/span>\r\n  size_t<\/span> file_size<\/span>;<\/span>\r\n}<\/span> MMapObject<\/span>;<\/span>\r\n<\/code><\/pre>\n
\u8fd9\u662f\u4e00\u4e2a\u53d8\u91cf\uff0c\u5b83\u6301\u6709MMap\u7c7b\u578b\uff0c\u5e76\u4e14\u8fd9\u662f\u4e00\u4e2a\u751f\u6210MMapObject\u7684\u51fd\u6570\u3002<\/p>\n
%%<\/span>writefile<\/span> -<\/span>a<\/span> fmmap<\/span>.<\/span>c<\/span>\r\n\r\nRedisModuleType<\/span> *<\/span>MMapType<\/span> =<\/span> NULL<\/span>;<\/span> \/\/<\/span> MMap\u578b\u3092\u4fdd\u6301\u3059\u308b\u5909\u6570<\/span>\r\n\r\n\/\/<\/span> MMapObject\u306e\u751f\u6210<\/span>\r\nMMapObject<\/span> *<\/span>MCreateObject<\/span>(<\/span>void<\/span>)<\/span>\r\n{<\/span>\r\n  return <\/span>(<\/span>MMapObject<\/span> *<\/span>)<\/span>zcalloc<\/span>(<\/span>sizeof<\/span>(<\/span>MMapObject<\/span>));<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u8fd9\u4e2a\u51fd\u6570\u7528\u4e8e\u91ca\u653e MMapObject \u5bf9\u8c61\u3002<\/p>\n
%%<\/span>writefile<\/span> -<\/span>a<\/span> fmmap<\/span>.<\/span>c<\/span>\r\n\r\n\/\/<\/span> MMapObject\u306e\u89e3\u653e<\/span>\r\nvoid<\/span> MFree<\/span>(<\/span>void<\/span> *<\/span>value<\/span>)<\/span>\r\n{<\/span>\r\n  if <\/span>(<\/span>value<\/span> ==<\/span> NULL<\/span>)<\/span> return<\/span>;<\/span>\r\n  const<\/span> MMapObject<\/span> *<\/span>obj_ptr<\/span> =<\/span> value<\/span>;<\/span>\r\n  if <\/span>(<\/span>obj_ptr<\/span>-><\/span>mmap<\/span> !=<\/span> NULL<\/span>)<\/span> munmap<\/span>(<\/span>obj_ptr<\/span>-><\/span>mmap<\/span>,<\/span> obj_ptr<\/span>-><\/span>file_size<\/span>);<\/span>\r\n  if <\/span>(<\/span>obj_ptr<\/span>-><\/span>fd<\/span> !=<\/span> -<\/span>1<\/span>)<\/span> close<\/span>(<\/span>obj_ptr<\/span>-><\/span>fd<\/span>);<\/span>\r\n  sdsfree<\/span>(<\/span>obj_ptr<\/span>-><\/span>file_path<\/span>);<\/span>\r\n  zfree<\/span>(<\/span>value<\/span>);<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u8fd9\u662f\u4e00\u4e2a\u5c06\u4ee5file_path\u6307\u5b9a\u7684\u6587\u4ef6\u6620\u5c04\u4e3a\u952e\u7684\u51fd\u6570\u3002<\/p>\n
%%<\/span>writefile<\/span> -<\/span>a<\/span> fmmap<\/span>.<\/span>c<\/span>\r\n\r\n\/\/<\/span> MMAP<\/span> key<\/span> file_path<\/span>\r\nint<\/span> MMap_RedisCommand<\/span>(<\/span>RedisModuleCtx<\/span> *<\/span>ctx<\/span>,<\/span> RedisModuleString<\/span> **<\/span>argv<\/span>,<\/span> int<\/span> argc<\/span>)<\/span>\r\n{<\/span>\r\n  RedisModule_AutoMemory<\/span>(<\/span>ctx<\/span>);<\/span> \/*<\/span> Use<\/span> automatic<\/span> memory<\/span> management<\/span>.<\/span> *\/<\/span>\r\n\r\n  if <\/span>(<\/span>argc<\/span> !=<\/span> 3<\/span>)<\/span> return<\/span> RedisModule_WrongArity<\/span>(<\/span>ctx<\/span>);<\/span>\r\n\r\n  RedisModuleKey<\/span> *<\/span>key<\/span> =<\/span> RedisModule_OpenKey<\/span>(<\/span>ctx<\/span>,<\/span> argv<\/span>[<\/span>1<\/span>],<\/span> REDISMODULE_READ<\/span> |<\/span> REDISMODULE_WRITE<\/span>);<\/span>\r\n\r\n  \/\/<\/span> key\u306e\u578b\u3092\u78ba\u8a8d\u3059\u308b<\/span>\r\n  int<\/span> type<\/span> =<\/span> RedisModule_KeyType<\/span>(<\/span>key<\/span>);<\/span>\r\n  if <\/span>(<\/span>type<\/span> !=<\/span> REDISMODULE_KEYTYPE_EMPTY<\/span> &&<\/span>\r\n      RedisModule_ModuleTypeGetType<\/span>(<\/span>key<\/span>)<\/span> !=<\/span> MMapType<\/span>)<\/span> {<\/span>\r\n    return<\/span> RedisModule_ReplyWithError<\/span>(<\/span>ctx<\/span>,<\/span> REDISMODULE_ERRORMSG_WRONGTYPE<\/span>);<\/span>\r\n  }<\/span>\r\n\r\n  \/\/<\/span> key\u304c\u7a7a\u306a\u3089\u65b0\u305f\u306b\u4f5c\u6210\u3057\u3066mmap\u3059\u308b<\/span>\r\n  MMapObject<\/span> *<\/span>obj_ptr<\/span>;<\/span>\r\n  if <\/span>(<\/span>type<\/span> ==<\/span> REDISMODULE_KEYTYPE_EMPTY<\/span>)<\/span> {<\/span>\r\n    obj_ptr<\/span> =<\/span> MCreateObject<\/span>();<\/span>\r\n    obj_ptr<\/span>-><\/span>file_path<\/span> =<\/span> sdsnew<\/span>(<\/span>RedisModule_StringPtrLen<\/span>(<\/span>argv<\/span>[<\/span>2<\/span>],<\/span> NULL<\/span>));<\/span>\r\n    obj_ptr<\/span>-><\/span>fd<\/span> =<\/span> open<\/span>(<\/span>obj_ptr<\/span>-><\/span>file_path<\/span>,<\/span> O_RDWR<\/span> |<\/span> O_CREAT<\/span>,<\/span> 0666<\/span>);<\/span>\r\n    if <\/span>(<\/span>obj_ptr<\/span>-><\/span>fd<\/span> ==<\/span> -<\/span>1<\/span>)<\/span> {<\/span>\r\n        MFree<\/span>(<\/span>obj_ptr<\/span>);<\/span>\r\n        return<\/span> RedisModule_ReplyWithError<\/span>(<\/span>ctx<\/span>,<\/span> sdsnew<\/span>(<\/span>RedisModule_StringPtrLen<\/span>(<\/span>argv<\/span>[<\/span>2<\/span>],<\/span> NULL<\/span>)));<\/span>\r\n    }<\/span>\r\n\r\n    struct<\/span> stat<\/span> sb<\/span>;<\/span>\r\n    fstat<\/span>(<\/span>obj_ptr<\/span>-><\/span>fd<\/span>,<\/span> &<\/span>sb<\/span>);<\/span>\r\n    obj_ptr<\/span>-><\/span>file_size<\/span> =<\/span> sb<\/span>.<\/span>st_size<\/span>;<\/span>\r\n    obj_ptr<\/span>-><\/span>mmap<\/span> =<\/span> mmap<\/span>(<\/span>NULL<\/span>,<\/span> sb<\/span>.<\/span>st_size<\/span>,<\/span> PROT_READ<\/span> |<\/span> PROT_WRITE<\/span>,<\/span> MAP_SHARED<\/span>,<\/span> obj_ptr<\/span>-><\/span>fd<\/span>,<\/span> 0<\/span>);<\/span>\r\n    RedisModule_ModuleTypeSetValue<\/span>(<\/span>key<\/span>,<\/span> MMapType<\/span>,<\/span> obj_ptr<\/span>);<\/span>\r\n  }<\/span>\r\n  \/\/<\/span> \u65e2\u5b58\u306ekey\u304c\u3042\u308b\u5834\u5408\u306f\u540c\u4e00\u6027\u3092\u78ba\u8a8d\u3059\u308b<\/span>\r\n  else<\/span> {<\/span>\r\n    obj_ptr<\/span> =<\/span> RedisModule_ModuleTypeGetValue<\/span>(<\/span>key<\/span>);<\/span>\r\n    if <\/span>(<\/span>obj_ptr<\/span> ==<\/span> NULL<\/span>)<\/span> {<\/span>\r\n      RedisModule_ReplyWithNull<\/span>(<\/span>ctx<\/span>);<\/span>\r\n      return<\/span> REDISMODULE_ERR<\/span>;<\/span>\r\n    }<\/span>\r\n    \/\/<\/span> \u65e2\u5b58\u306e\u30d5\u30a1\u30a4\u30eb\u3068\u7570\u306a\u308b\u5834\u5408\u306f\u30a8\u30e9\u30fc<\/span>\r\n    if <\/span>(<\/span>strcmp<\/span>(<\/span>obj_ptr<\/span>-><\/span>file_path<\/span>,<\/span> RedisModule_StringPtrLen<\/span>(<\/span>argv<\/span>[<\/span>2<\/span>],<\/span> NULL<\/span>))<\/span> !=<\/span> 0<\/span>)<\/span> {<\/span>\r\n      return<\/span> RedisModule_ReplyWithError<\/span>(<\/span>ctx<\/span>,<\/span> \"<\/span>It is already mapped on another file.<\/span>\"<\/span>);<\/span>\r\n    }<\/span>\r\n  }<\/span>\r\n\r\n  return<\/span> RedisModule_ReplyWithLongLong<\/span>(<\/span>ctx<\/span>,<\/span> obj_ptr<\/span>-><\/span>file_size<\/span> \/<\/span> sizeof<\/span>(<\/span>double<\/span>));<\/span>\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
\u8fd9\u662f\u4e00\u4e2a\u7528\u4e8e\u83b7\u53d6\u6307\u5b9a\u4f4d\u7f6e\u503c\u7684\u51fd\u6570\uff0c\u5728\u7d22\u5f15\u4e2d\u6307\u5b9a\u4f4d\u7f6e\u7684\u503c\u3002<\/p>\n
%%<\/span>writefile<\/span> -<\/span>a<\/span> fmmap<\/span>.<\/span>c<\/span>\r\n\r\n\/\/<\/span> VGET<\/span> key<\/span> index<\/span>\r\nint<\/span> VGet_RedisCommand<\/span>(<\/span>RedisModuleCtx<\/span> *<\/span>ctx<\/span>,<\/span> RedisModuleString<\/span> **<\/span>argv<\/span>,<\/span> int<\/span> argc<\/span>)<\/span>\r\n{<\/span>\r\n  RedisModule_AutoMemory<\/span>(<\/span>ctx<\/span>);<\/span> \/*<\/span> Use<\/span> automatic<\/span> memory<\/span> management<\/span>.<\/span> *\/<\/span>\r\n\r\n  RedisModuleKey<\/span> *<\/span>key<\/span> =<\/span>\r\n    RedisModule_OpenKey<\/span>(<\/span>ctx<\/span>,<\/span> argv<\/span>[<\/span>1<\/span>],<\/span> REDISMODULE_READ<\/span> |<\/span> REDISMODULE_WRITE<\/span>);<\/span>\r\n\r\n  long<\/span> long<\/span> index<\/span>;<\/span>\r\n  RedisModule_StringToLongLong<\/span>(<\/span>argv<\/span>[<\/span>2<\/span>],<\/span> &<\/span>index<\/span>);<\/span>\r\n\r\n  MMapObject<\/span> *<\/span>obj_ptr<\/span> =<\/span> RedisModule_ModuleTypeGetValue<\/span>(<\/span>key<\/span>);<\/span>\r\n\r\n  \/\/<\/span> index\u304c\u7bc4\u56f2\u5916\u306a\u3089Null\u3092\u8fd4\u3059<\/span>\r\n  if <\/span>(<\/span>obj_ptr<\/span>-><\/span>file_size<\/span> <<\/span> (<\/span>size_t<\/span>)<\/span>index<\/span> *<\/span> sizeof<\/span>(<\/span>double<\/span>)<\/span> ||<\/span> index<\/span> <<\/span> 0<\/span>)<\/span> {<\/span>\r\n    RedisModule_ReplyWithNull<\/span>(<\/span>ctx<\/span>);<\/span>\r\n  }<\/span>\r\n  \/\/<\/span> mmap<\/span>[<\/span>index<\/span>]<\/span>\u3092\u8fd4\u3059<\/span>\r\n  else<\/span> {<\/span>\r\n    RedisModule_ReplyWithDouble<\/span>(<\/span>ctx<\/span>,<\/span> ((<\/span>double<\/span>*<\/span>)<\/span>obj_ptr<\/span>-><\/span>mmap<\/span>)[<\/span>index<\/span>]);<\/span>\r\n  }<\/span>\r\n  return<\/span> REDISMODULE_OK<\/span>;<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u8fd9\u662f\u4e00\u4e2a\u51fd\u6570\uff0c\u7528\u591a\u4e2a\u7d22\u5f15\u6765\u83b7\u53d6\u6307\u5b9a\u4f4d\u7f6e\u7684\u503c\u3002<\/p>\n
%%<\/span>writefile<\/span> -<\/span>a<\/span> fmmap<\/span>.<\/span>c<\/span>\r\n\r\n\/\/<\/span> VMGET<\/span> key<\/span> index<\/span> [<\/span>index<\/span> ...]<\/span>\r\nint<\/span> VMGet_RedisCommand<\/span>(<\/span>RedisModuleCtx<\/span> *<\/span>ctx<\/span>,<\/span> RedisModuleString<\/span> **<\/span>argv<\/span>,<\/span> int<\/span> argc<\/span>)<\/span>\r\n{<\/span>\r\n  RedisModule_AutoMemory<\/span>(<\/span>ctx<\/span>);<\/span> \/*<\/span> Use<\/span> automatic<\/span> memory<\/span> management<\/span>.<\/span> *\/<\/span>\r\n\r\n  RedisModuleKey<\/span> *<\/span>key<\/span> =<\/span>\r\n      RedisModule_OpenKey<\/span>(<\/span>ctx<\/span>,<\/span> argv<\/span>[<\/span>1<\/span>],<\/span> REDISMODULE_READ<\/span> |<\/span> REDISMODULE_WRITE<\/span>);<\/span>\r\n\r\n  MMapObject<\/span> *<\/span>obj_ptr<\/span> =<\/span> RedisModule_ModuleTypeGetValue<\/span>(<\/span>key<\/span>);<\/span>\r\n\r\n  RedisModule_ReplyWithArray<\/span>(<\/span>ctx<\/span>,<\/span> argc<\/span> -<\/span> 2<\/span>);<\/span>\r\n  for <\/span>(<\/span>int<\/span> i<\/span> =<\/span> 2<\/span>;<\/span> i<\/span> <<\/span> argc<\/span>;<\/span> i<\/span>++<\/span>)<\/span> {<\/span>\r\n    long<\/span> long<\/span> index<\/span>;<\/span>\r\n    RedisModule_StringToLongLong<\/span>(<\/span>argv<\/span>[<\/span>i<\/span>],<\/span> &<\/span>index<\/span>);<\/span>\r\n    \/\/<\/span> index\u304c\u7bc4\u56f2\u5916\u306a\u3089Null\u3092\u8fd4\u3059<\/span>\r\n    if <\/span>(<\/span>obj_ptr<\/span>-><\/span>file_size<\/span> <<\/span> (<\/span>size_t<\/span>)<\/span>index<\/span> *<\/span> sizeof<\/span>(<\/span>double<\/span>)<\/span> ||<\/span> index<\/span> <<\/span> 0<\/span>)<\/span> {<\/span>\r\n      RedisModule_ReplyWithNull<\/span>(<\/span>ctx<\/span>);<\/span>\r\n    }<\/span>\r\n    \/\/<\/span> mmap<\/span>[<\/span>index<\/span>]<\/span>\u3092\u8fd4\u3059<\/span>\r\n    else<\/span> {<\/span>\r\n      RedisModule_ReplyWithDouble<\/span>(<\/span>ctx<\/span>,<\/span> ((<\/span>double<\/span>*<\/span>)<\/span>obj_ptr<\/span>-><\/span>mmap<\/span>)[<\/span>index<\/span>]);<\/span>\r\n    }<\/span>\r\n  }<\/span>\r\n  return<\/span> REDISMODULE_OK<\/span>;<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u8fd9\u662f\u4e00\u4e2a\u5c06\u503c\u5199\u5165\u7d22\u5f15\u4f4d\u7f6e\u7684\u51fd\u6570, \u5176\u7d22\u5f15\u7531\u7d22\u5f15\u8868\u793a\u3002<\/p>\n
%%<\/span>writefile<\/span> -<\/span>a<\/span> fmmap<\/span>.<\/span>c<\/span>\r\n\r\n\/\/<\/span> VSET<\/span> key<\/span> index<\/span> value<\/span> [<\/span>index<\/span> value<\/span> ...]<\/span>\r\nint<\/span> VSet_RedisCommand<\/span>(<\/span>RedisModuleCtx<\/span> *<\/span>ctx<\/span>,<\/span> RedisModuleString<\/span> **<\/span>argv<\/span>,<\/span> int<\/span> argc<\/span>)<\/span>\r\n{<\/span>\r\n  RedisModule_AutoMemory<\/span>(<\/span>ctx<\/span>);<\/span> \/*<\/span> Use<\/span> automatic<\/span> memory<\/span> management<\/span>.<\/span> *\/<\/span>\r\n\r\n  RedisModuleKey<\/span> *<\/span>key<\/span> =<\/span>\r\n      RedisModule_OpenKey<\/span>(<\/span>ctx<\/span>,<\/span> argv<\/span>[<\/span>1<\/span>],<\/span> REDISMODULE_READ<\/span> |<\/span> REDISMODULE_WRITE<\/span>);<\/span>\r\n\r\n  MMapObject<\/span> *<\/span>obj_ptr<\/span> =<\/span> RedisModule_ModuleTypeGetValue<\/span>(<\/span>key<\/span>);<\/span>\r\n\r\n  long<\/span> long<\/span> index<\/span>;<\/span>\r\n  double<\/span> value<\/span>;<\/span>\r\n  \/\/<\/span> \u66f8\u304d\u8fbc\u3080\u5024\u306e\u578b\u3092\u78ba\u8a8d\u3059\u308b<\/span>\r\n  for <\/span>(<\/span>int<\/span> i<\/span> =<\/span> 3<\/span>;<\/span> i<\/span> <<\/span> argc<\/span>;<\/span> i<\/span> +=<\/span> 2<\/span>)<\/span> {<\/span>\r\n    if <\/span>(<\/span>RedisModule_StringToDouble<\/span>(<\/span>argv<\/span>[<\/span>i<\/span>],<\/span> &<\/span>value<\/span>)<\/span> ==<\/span> REDISMODULE_ERR<\/span>)<\/span> {<\/span>\r\n      return<\/span> RedisModule_ReplyWithError<\/span>(<\/span>ctx<\/span>,<\/span> \"<\/span>value must be double.<\/span>\"<\/span>);<\/span>\r\n    }<\/span>\r\n  }<\/span>\r\n  int<\/span> n_factors<\/span> =<\/span> 0<\/span>;<\/span>  \/\/<\/span> \u66f8\u304d\u8fbc\u3081\u305f\u8981\u7d20\u306e\u6570\u3092\u4fdd\u6301\u3059\u308b\u5909\u6570<\/span>\r\n  \/\/<\/span> mmap<\/span>[<\/span>index<\/span>]<\/span>\u306b\u5024\u3092\u66f8\u304d\u8fbc\u3080<\/span>\r\n  for <\/span>(<\/span>int<\/span> i<\/span> =<\/span> 2<\/span>;<\/span> i<\/span> <<\/span> argc<\/span>;<\/span> i<\/span> +=<\/span> 2<\/span>)<\/span> {<\/span>\r\n    RedisModule_StringToLongLong<\/span>(<\/span>argv<\/span>[<\/span>i<\/span>],<\/span> &<\/span>index<\/span>);<\/span>\r\n    \/\/<\/span> index\u304c\u7bc4\u56f2\u5185\u306e\u6642\u306e\u307f\u66f8\u304d\u8fbc\u3080<\/span>\r\n    if <\/span>(<\/span>0<\/span> <=<\/span> index<\/span> &&<\/span> (<\/span>size_t<\/span>)<\/span>index<\/span> *<\/span> sizeof<\/span>(<\/span>double<\/span>)<\/span> <<\/span> obj_ptr<\/span>-><\/span>file_size<\/span>)<\/span> {<\/span>\r\n      RedisModule_StringToDouble<\/span>(<\/span>argv<\/span>[<\/span>i<\/span> +<\/span> 1<\/span>],<\/span> &<\/span>value<\/span>);<\/span>\r\n      ((<\/span>double<\/span>*<\/span>)<\/span>obj_ptr<\/span>-><\/span>mmap<\/span>)[<\/span>index<\/span>]<\/span> =<\/span> (<\/span>double<\/span>)<\/span>value<\/span>;<\/span>\r\n      ++<\/span>n_factors<\/span>;<\/span>\r\n    }<\/span>\r\n  }<\/span>\r\n  \/\/<\/span> \u66f8\u304d\u8fbc\u3093\u3060\u56de\u6570\u3092\u8fd4\u3059<\/span>\r\n  return<\/span> RedisModule_ReplyWithLongLong<\/span>(<\/span>ctx<\/span>,<\/span> n_factors<\/span>);<\/span>\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
\u8fd9\u4e2a\u51fd\u6570\u7528\u6765\u5728\u6587\u4ef6\u672b\u5c3e\u8ffd\u52a0\u503c\u3002<\/p>\n
%%<\/span>writefile<\/span> -<\/span>a<\/span> fmmap<\/span>.<\/span>c<\/span>\r\n\r\n\/\/<\/span> VADD<\/span> key<\/span> value<\/span> [<\/span>value<\/span> ...]<\/span>\r\nint<\/span> VAdd_RedisCommand<\/span>(<\/span>RedisModuleCtx<\/span> *<\/span>ctx<\/span>,<\/span> RedisModuleString<\/span> **<\/span>argv<\/span>,<\/span> int<\/span> argc<\/span>)<\/span>\r\n{<\/span>\r\n  RedisModule_AutoMemory<\/span>(<\/span>ctx<\/span>);<\/span> \/*<\/span> Use<\/span> automatic<\/span> memory<\/span> management<\/span>.<\/span> *\/<\/span>\r\n\r\n  RedisModuleKey<\/span> *<\/span>key<\/span> =<\/span>\r\n      RedisModule_OpenKey<\/span>(<\/span>ctx<\/span>,<\/span> argv<\/span>[<\/span>1<\/span>],<\/span> REDISMODULE_READ<\/span> |<\/span> REDISMODULE_WRITE<\/span>);<\/span>\r\n\r\n  MMapObject<\/span> *<\/span>obj_ptr<\/span> =<\/span> RedisModule_ModuleTypeGetValue<\/span>(<\/span>key<\/span>);<\/span>\r\n  double<\/span> value<\/span>;<\/span>\r\n  \/\/<\/span> \u8ffd\u52a0\u3059\u308b\u5024\u306e\u578b\u3092\u78ba\u8a8d\u3059\u308b<\/span>\r\n  for <\/span>(<\/span>int<\/span> i<\/span> =<\/span> 2<\/span>;<\/span> i<\/span> <<\/span> argc<\/span>;<\/span> ++<\/span>i<\/span>)<\/span> {<\/span>\r\n    if <\/span>(<\/span>RedisModule_StringToDouble<\/span>(<\/span>argv<\/span>[<\/span>i<\/span>],<\/span> &<\/span>value<\/span>)<\/span> ==<\/span> REDISMODULE_ERR<\/span>)<\/span> {<\/span>\r\n      return<\/span> RedisModule_ReplyWithError<\/span>(<\/span>ctx<\/span>,<\/span> \"<\/span>value must be double.<\/span>\"<\/span>);<\/span>\r\n    }<\/span>\r\n  }<\/span>\r\n  \/\/<\/span> mmap\u3092\u62e1\u5f35\u3057\u3066\u66f8\u304d\u8fbc\u3080<\/span>\r\n  size_t<\/span> new_size<\/span> =<\/span> obj_ptr<\/span>-><\/span>file_size<\/span> +<\/span> sizeof<\/span>(<\/span>double<\/span>)<\/span> *<\/span> (<\/span>argc<\/span> -<\/span> 2<\/span>);<\/span>\r\n  ftruncate<\/span>(<\/span>obj_ptr<\/span>-><\/span>fd<\/span>,<\/span> new_size<\/span>);<\/span>\r\n  munmap<\/span>(<\/span>obj_ptr<\/span>-><\/span>mmap<\/span>,<\/span> obj_ptr<\/span>-><\/span>file_size<\/span>);<\/span>\r\n  obj_ptr<\/span>-><\/span>mmap<\/span> =<\/span> mmap<\/span>(<\/span>NULL<\/span>,<\/span> new_size<\/span>,<\/span> PROT_READ<\/span> |<\/span> PROT_WRITE<\/span>,<\/span> MAP_SHARED<\/span>,<\/span> obj_ptr<\/span>-><\/span>fd<\/span>,<\/span> 0<\/span>);<\/span>\r\n  for <\/span>(<\/span>int<\/span> i<\/span> =<\/span> 2<\/span>;<\/span> i<\/span> <<\/span> argc<\/span>;<\/span> ++<\/span>i<\/span>)<\/span> {<\/span>\r\n    size_t<\/span> index<\/span> =<\/span> obj_ptr<\/span>-><\/span>file_size<\/span> \/<\/span> sizeof<\/span>(<\/span>double<\/span>);<\/span>\r\n    RedisModule_StringToDouble<\/span>(<\/span>argv<\/span>[<\/span>i<\/span>],<\/span> &<\/span>value<\/span>);<\/span>\r\n    obj_ptr<\/span>-><\/span>file_size<\/span> +=<\/span> sizeof<\/span>(<\/span>double<\/span>);<\/span>\r\n    ((<\/span>double<\/span>*<\/span>)<\/span>obj_ptr<\/span>-><\/span>mmap<\/span>)[<\/span>index<\/span>]<\/span> =<\/span> (<\/span>double<\/span>)<\/span>value<\/span>;<\/span>\r\n  }<\/span>\r\n\r\n  \/\/<\/span> \u66f8\u304d\u8fbc\u3093\u3060\u8981\u7d20\u306e\u6570\u3092\u8fd4\u3059<\/span>\r\n  return<\/span> RedisModule_ReplyWithLongLong<\/span>(<\/span>ctx<\/span>,<\/span> argc<\/span> -<\/span> 2<\/span>);<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u8fd9\u4e2a\u51fd\u6570\u7528\u4e8e\u83b7\u53d6\u6587\u4ef6\u4e2d\u5305\u542b\u7684\u503c\u7684\u6570\u91cf\u3002<\/p>\n
%%<\/span>writefile<\/span> -<\/span>a<\/span> fmmap<\/span>.<\/span>c<\/span>\r\n\r\n\/\/<\/span> VSIZE<\/span> key<\/span>\r\nint<\/span> VSize_RedisCommand<\/span>(<\/span>RedisModuleCtx<\/span> *<\/span>ctx<\/span>,<\/span> RedisModuleString<\/span> **<\/span>argv<\/span>,<\/span> int<\/span> argc<\/span>)<\/span>\r\n{<\/span>\r\n  RedisModule_AutoMemory<\/span>(<\/span>ctx<\/span>);<\/span> \/*<\/span> Use<\/span> automatic<\/span> memory<\/span> management<\/span>.<\/span> *\/<\/span>\r\n\r\n  RedisModuleKey<\/span> *<\/span>key<\/span> =<\/span>\r\n      RedisModule_OpenKey<\/span>(<\/span>ctx<\/span>,<\/span> argv<\/span>[<\/span>1<\/span>],<\/span> REDISMODULE_READ<\/span> |<\/span> REDISMODULE_WRITE<\/span>);<\/span>\r\n\r\n  MMapObject<\/span> *<\/span>obj_ptr<\/span> =<\/span> RedisModule_ModuleTypeGetValue<\/span>(<\/span>key<\/span>);<\/span>\r\n\r\n  return<\/span> RedisModule_ReplyWithLongLong<\/span>(<\/span>ctx<\/span>,<\/span> obj_ptr<\/span>-><\/span>file_size<\/span> \/<\/span> sizeof<\/span>(<\/span>double<\/span>));<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u8fd9\u662f\u4e00\u4e2a\u7528\u6765\u6e05\u9664\u6587\u4ef6\u5185\u5bb9\u7684\u51fd\u6570\u3002<\/p>\n
%%<\/span>writefile<\/span> -<\/span>a<\/span> fmmap<\/span>.<\/span>c<\/span>\r\n\r\n\/\/<\/span> VCLEAR<\/span> key<\/span>\r\nint<\/span> VClear_RedisCommand<\/span>(<\/span>RedisModuleCtx<\/span> *<\/span>ctx<\/span>,<\/span> RedisModuleString<\/span> **<\/span>argv<\/span>,<\/span> int<\/span> argc<\/span>)<\/span>\r\n{<\/span>\r\n  RedisModule_AutoMemory<\/span>(<\/span>ctx<\/span>);<\/span> \/*<\/span> Use<\/span> automatic<\/span> memory<\/span> management<\/span>.<\/span> *\/<\/span>\r\n\r\n  RedisModuleKey<\/span> *<\/span>key<\/span> =<\/span>\r\n      RedisModule_OpenKey<\/span>(<\/span>ctx<\/span>,<\/span> argv<\/span>[<\/span>1<\/span>],<\/span> REDISMODULE_READ<\/span> |<\/span> REDISMODULE_WRITE<\/span>);<\/span>\r\n\r\n  MMapObject<\/span> *<\/span>obj_ptr<\/span> =<\/span> RedisModule_ModuleTypeGetValue<\/span>(<\/span>key<\/span>);<\/span>\r\n\r\n  munmap<\/span>(<\/span>obj_ptr<\/span>-><\/span>mmap<\/span>,<\/span> obj_ptr<\/span>-><\/span>file_size<\/span>);<\/span>\r\n  ftruncate<\/span>(<\/span>obj_ptr<\/span>-><\/span>fd<\/span>,<\/span> 0<\/span>);<\/span>\r\n  obj_ptr<\/span>-><\/span>mmap<\/span> =<\/span> mmap<\/span>(<\/span>NULL<\/span>,<\/span> 0<\/span>,<\/span> PROT_READ<\/span> |<\/span> PROT_WRITE<\/span>,<\/span> MAP_SHARED<\/span>,<\/span> obj_ptr<\/span>-><\/span>fd<\/span>,<\/span> 0<\/span>);<\/span>\r\n  RedisModule_ReplyWithLongLong<\/span>(<\/span>ctx<\/span>,<\/span> obj_ptr<\/span>-><\/span>file_size<\/span> \/<\/span> sizeof<\/span>(<\/span>double<\/span>));<\/span>\r\n  obj_ptr<\/span>-><\/span>file_size<\/span> =<\/span> 0<\/span>;<\/span>\r\n\r\n  return<\/span> REDISMODULE_OK<\/span>;<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u8fd9\u662f\u4e00\u4e2a\u51fd\u6570\uff0c\u53ef\u4ee5\u4ece\u6587\u4ef6\u672b\u5c3e\u83b7\u53d6\u5e76\u5220\u9664\u6570\u503c\u3002<\/p>\n
%%<\/span>writefile<\/span> -<\/span>a<\/span> fmmap<\/span>.<\/span>c<\/span>\r\n\r\n\/\/<\/span> VPOP<\/span> key<\/span>\r\nint<\/span> VPop_RedisCommand<\/span>(<\/span>RedisModuleCtx<\/span> *<\/span>ctx<\/span>,<\/span> RedisModuleString<\/span> **<\/span>argv<\/span>,<\/span> int<\/span> argc<\/span>)<\/span>\r\n{<\/span>\r\n  RedisModule_AutoMemory<\/span>(<\/span>ctx<\/span>);<\/span> \/*<\/span> Use<\/span> automatic<\/span> memory<\/span> management<\/span>.<\/span> *\/<\/span>\r\n\r\n  RedisModuleKey<\/span> *<\/span>key<\/span> =<\/span>\r\n      RedisModule_OpenKey<\/span>(<\/span>ctx<\/span>,<\/span> argv<\/span>[<\/span>1<\/span>],<\/span> REDISMODULE_READ<\/span> |<\/span> REDISMODULE_WRITE<\/span>);<\/span>\r\n\r\n  MMapObject<\/span> *<\/span>obj_ptr<\/span> =<\/span> RedisModule_ModuleTypeGetValue<\/span>(<\/span>key<\/span>);<\/span>\r\n\r\n  if <\/span>(<\/span>obj_ptr<\/span>-><\/span>file_size<\/span> ==<\/span> 0<\/span>)<\/span> {<\/span>\r\n    RedisModule_ReplyWithNull<\/span>(<\/span>ctx<\/span>);<\/span>\r\n  }<\/span>\r\n  else<\/span> {<\/span>\r\n    size_t<\/span> index<\/span> =<\/span> obj_ptr<\/span>-><\/span>file_size<\/span> \/<\/span> sizeof<\/span>(<\/span>double<\/span>)<\/span> -<\/span> 1<\/span>;<\/span>\r\n    RedisModule_ReplyWithDouble<\/span>(<\/span>ctx<\/span>,<\/span> ((<\/span>double<\/span>*<\/span>)<\/span>obj_ptr<\/span>-><\/span>mmap<\/span>)[<\/span>index<\/span>]);<\/span>\r\n    munmap<\/span>(<\/span>obj_ptr<\/span>-><\/span>mmap<\/span>,<\/span> obj_ptr<\/span>-><\/span>file_size<\/span>);<\/span>\r\n    obj_ptr<\/span>-><\/span>file_size<\/span> -=<\/span> sizeof<\/span>(<\/span>double<\/span>);<\/span>\r\n    ftruncate<\/span>(<\/span>obj_ptr<\/span>-><\/span>fd<\/span>,<\/span> obj_ptr<\/span>-><\/span>file_size<\/span>);<\/span>\r\n    obj_ptr<\/span>-><\/span>mmap<\/span> =<\/span> mmap<\/span>(<\/span>NULL<\/span>,<\/span> obj_ptr<\/span>-><\/span>file_size<\/span>,<\/span> PROT_READ<\/span> |<\/span> PROT_WRITE<\/span>,<\/span> MAP_SHARED<\/span>,<\/span> obj_ptr<\/span>-><\/span>fd<\/span>,<\/span> 0<\/span>);<\/span>\r\n  }<\/span>\r\n  return<\/span> REDISMODULE_OK<\/span>;<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u8fd9\u4e2a\u51fd\u6570\u7528\u4e8e\u5c06\u4e0emmap\u76f8\u5173\u7684\u4fe1\u606f\u4fdd\u5b58\u5728Redis\u7684RDB\u6587\u4ef6\u4e2d\u3002<\/p>\n
%%<\/span>writefile<\/span> -<\/span>a<\/span> fmmap<\/span>.<\/span>c<\/span>\r\n\r\nvoid<\/span> MRdbSave<\/span>(<\/span>RedisModuleIO<\/span> *<\/span>rdb<\/span>,<\/span> void<\/span> *<\/span>value<\/span>)<\/span>\r\n{<\/span>\r\n  MMapObject<\/span> *<\/span>obj_ptr<\/span> =<\/span> value<\/span>;<\/span>\r\n  RedisModule_SaveStringBuffer<\/span>(<\/span>rdb<\/span>,<\/span> obj_ptr<\/span>-><\/span>file_path<\/span>,<\/span> sdslen<\/span>(<\/span>obj_ptr<\/span>-><\/span>file_path<\/span>));<\/span>\r\n  msync<\/span>(<\/span>obj_ptr<\/span>-><\/span>mmap<\/span>,<\/span> obj_ptr<\/span>-><\/span>file_size<\/span>,<\/span> MS_ASYNC<\/span>);<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u8fd9\u662f\u4e00\u4e2a\u4eceRedis\u7684RDB\u6587\u4ef6\u4e2d\u8bfb\u53d6\u6709\u5173mmap\u7684\u4fe1\u606f\u7684\u51fd\u6570\u3002<\/p>\n
%%<\/span>writefile<\/span> -<\/span>a<\/span> fmmap<\/span>.<\/span>c<\/span>\r\n\r\nvoid<\/span> *<\/span>MRdbLoad<\/span>(<\/span>RedisModuleIO<\/span> *<\/span>rdb<\/span>,<\/span> int<\/span> encver<\/span>)<\/span>\r\n{<\/span>\r\n  MMapObject<\/span> *<\/span>obj_ptr<\/span> =<\/span> MCreateObject<\/span>();<\/span>\r\n  obj_ptr<\/span>-><\/span>file_path<\/span> =<\/span> sdsnew<\/span>(<\/span>RedisModule_StringPtrLen<\/span>(<\/span>RedisModule_LoadString<\/span>(<\/span>rdb<\/span>),<\/span> NULL<\/span>));<\/span>\r\n  obj_ptr<\/span>-><\/span>fd<\/span> =<\/span> open<\/span>(<\/span>obj_ptr<\/span>-><\/span>file_path<\/span>,<\/span> O_RDWR<\/span>);<\/span>\r\n\r\n  struct<\/span> stat<\/span> sb<\/span>;<\/span>\r\n  fstat<\/span>(<\/span>obj_ptr<\/span>-><\/span>fd<\/span>,<\/span> &<\/span>sb<\/span>);<\/span>\r\n  obj_ptr<\/span>-><\/span>file_size<\/span> =<\/span> sb<\/span>.<\/span>st_size<\/span>;<\/span>\r\n  obj_ptr<\/span>-><\/span>mmap<\/span> =<\/span> mmap<\/span>(<\/span>NULL<\/span>,<\/span> sb<\/span>.<\/span>st_size<\/span>,<\/span> PROT_READ<\/span> |<\/span> PROT_WRITE<\/span>,<\/span> MAP_SHARED<\/span>,<\/span> obj_ptr<\/span>-><\/span>fd<\/span>,<\/span> 0<\/span>);<\/span>\r\n\r\n  return<\/span> obj_ptr<\/span>;<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u9019\u662f\u4e00\u500b\u7528\u65bc\u4f7f\u7528Redis AOF\u7684\u51fd\u6578\u3002<\/p>\n
%%<\/span>writefile<\/span> -<\/span>a<\/span> fmmap<\/span>.<\/span>c<\/span>\r\n\r\nvoid<\/span> MAofRewrite<\/span>(<\/span>RedisModuleIO<\/span> *<\/span>aof<\/span>,<\/span> RedisModuleString<\/span> *<\/span>key<\/span>,<\/span> void<\/span> *<\/span>value<\/span>)<\/span>\r\n{<\/span>\r\n  char<\/span> buffer<\/span>[<\/span>0x200<\/span>];<\/span>\r\n  MMapObject<\/span> *<\/span>obj_ptr<\/span> =<\/span> (<\/span>MMapObject<\/span>*<\/span>)<\/span>value<\/span>;<\/span>\r\n  RedisModule_EmitAOF<\/span>(<\/span>aof<\/span>,<\/span> \"<\/span>MMAP<\/span>\"<\/span>,<\/span> \"<\/span>sc<\/span>\"<\/span>,<\/span>\r\n                      key<\/span>,<\/span>\r\n                      obj_ptr<\/span>-><\/span>file_path<\/span>);<\/span>\r\n  RedisModule_EmitAOF<\/span>(<\/span>aof<\/span>,<\/span> \"<\/span>MCLEAR<\/span>\"<\/span>,<\/span> \"<\/span>ss<\/span>\"<\/span>,<\/span> key<\/span>,<\/span> obj_ptr<\/span>-><\/span>file_path<\/span>);<\/span>\r\n  for <\/span>(<\/span>size_t<\/span> i<\/span> =<\/span> 0<\/span>;<\/span> i<\/span> <<\/span> obj_ptr<\/span>-><\/span>file_size<\/span>;<\/span> i<\/span> +=<\/span> sizeof<\/span>(<\/span>double<\/span>))<\/span> {<\/span>\r\n    double<\/span> value<\/span> =<\/span> *<\/span>(<\/span>double<\/span> *<\/span>)((<\/span>uint8_t<\/span>*<\/span>)<\/span>obj_ptr<\/span>-><\/span>mmap<\/span> +<\/span> i<\/span>);<\/span>\r\n    sprintf<\/span>(<\/span>buffer<\/span>,<\/span> \"<\/span>%.16f<\/span>\"<\/span>,<\/span> value<\/span>);<\/span>\r\n    RedisModule_EmitAOF<\/span>(<\/span>aof<\/span>,<\/span> \"<\/span>MADD<\/span>\"<\/span>,<\/span> \"<\/span>sbc<\/span>\"<\/span>,<\/span> key<\/span>,<\/span> buffer<\/span>);<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u53e6\u5916\uff0c\u8fd9\u662fRedis\u6a21\u5757\u6240\u9700\u7684\u5176\u4ed6\u51fd\u6570\u3002<\/p>\n
%%<\/span>writefile<\/span> -<\/span>a<\/span> fmmap<\/span>.<\/span>c<\/span>\r\n\r\nsize_t<\/span> MMemUsage<\/span>(<\/span>const<\/span> void<\/span> *<\/span>value<\/span>)<\/span>\r\n{<\/span>\r\n  const<\/span> MMapObject<\/span> *<\/span>obj_ptr<\/span> =<\/span> value<\/span>;<\/span>\r\n  return<\/span> obj_ptr<\/span>-><\/span>file_size<\/span>;<\/span>\r\n}<\/span>\r\n\r\nvoid<\/span> MDigest<\/span>(<\/span>RedisModuleDigest<\/span> *<\/span>md<\/span>,<\/span> void<\/span> *<\/span>value<\/span>)<\/span>\r\n{<\/span>\r\n  REDISMODULE_NOT_USED<\/span>(<\/span>md<\/span>);<\/span>\r\n  REDISMODULE_NOT_USED<\/span>(<\/span>value<\/span>);<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5236\u4f5c\u4e00\u4e2a\u7528\u4e8e\u521b\u5efaRedis\u547d\u4ee4\u7684\u5b8f\u3002<\/p>\n
%%<\/span>writefile<\/span> -<\/span>a<\/span> fmmap<\/span>.<\/span>c<\/span>\r\n\r\n#define CREATE_CMD(name, tgt, attr, key_pos, key_last)                     \\\r\n<\/span>  do<\/span> {<\/span>                                                                     \\\r\n    if <\/span>(<\/span>RedisModule_CreateCommand<\/span>(<\/span>ctx<\/span>,<\/span> name<\/span>,<\/span> tgt<\/span>,<\/span> attr<\/span>,<\/span> key_pos<\/span>,<\/span> key_last<\/span>,<\/span> \\\r\n                                  1<\/span>)<\/span> !=<\/span> REDISMODULE_OK<\/span>)<\/span> {<\/span>                  \\\r\n      return<\/span> REDISMODULE_ERR<\/span>;<\/span>                                              \\\r\n    }<\/span>                                                                      \\\r\n  }<\/span> while <\/span>(<\/span>0<\/span>);<\/span>\r\n\r\n<\/code><\/pre>\n
\u5728\u52a0\u8f7d\u6a21\u5757\u65f6\u8c03\u7528\u7684\u51fd\u6570\uff0c\u7528\u4e8e\u51c6\u5907\u6a21\u5757\u3002\u5728\u8fd9\u91cc\uff0c\u5c06\u6bcf\u4e2a\u547d\u4ee4\u4e0e\u6267\u884c\u8be5\u547d\u4ee4\u7684\u51fd\u6570\u7ed1\u5b9a\u5728\u4e00\u8d77\u3002<\/p>\n
%%<\/span>writefile<\/span> -<\/span>a<\/span> fmmap<\/span>.<\/span>c<\/span>\r\n\r\nint<\/span> RedisModule_OnLoad<\/span>(<\/span>RedisModuleCtx<\/span> *<\/span>ctx<\/span>,<\/span> RedisModuleString<\/span> **<\/span>argv<\/span>,<\/span> int<\/span> argc<\/span>)<\/span>\r\n{<\/span>\r\n  REDISMODULE_NOT_USED<\/span>(<\/span>argv<\/span>);<\/span>\r\n  REDISMODULE_NOT_USED<\/span>(<\/span>argc<\/span>);<\/span>\r\n\r\n  RedisModule_Init<\/span>(<\/span>ctx<\/span>,<\/span> \"<\/span>FuchiMMap<\/span>\"<\/span>,<\/span> 1<\/span>,<\/span> REDISMODULE_APIVER_1<\/span>);<\/span>\r\n\r\n  RedisModuleTypeMethods<\/span> tm<\/span> =<\/span> {.<\/span>version<\/span> =<\/span> REDISMODULE_TYPE_METHOD_VERSION<\/span>,<\/span>\r\n                               .<\/span>rdb_load<\/span> =<\/span> MRdbLoad<\/span>,<\/span>\r\n                               .<\/span>rdb_save<\/span> =<\/span> MRdbSave<\/span>,<\/span>\r\n                               .<\/span>aof_rewrite<\/span> =<\/span> MAofRewrite<\/span>,<\/span>\r\n                               .<\/span>mem_usage<\/span> =<\/span> MMemUsage<\/span>,<\/span>\r\n                               .<\/span>free<\/span> =<\/span> MFree<\/span>,<\/span>\r\n                               .<\/span>digest<\/span> =<\/span> MDigest<\/span>};<\/span>\r\n\r\n  MMapType<\/span> =<\/span> RedisModule_CreateDataType<\/span>(<\/span>ctx<\/span>,<\/span> \"<\/span>FuchiMMap<\/span>\"<\/span>,<\/span> 0<\/span>,<\/span> &<\/span>tm<\/span>);<\/span>\r\n\r\n  \/\/<\/span> MMAP<\/span> key<\/span> file_path<\/span>\r\n  CREATE_CMD<\/span>(<\/span>\"<\/span>MMAP<\/span>\"<\/span>,<\/span> MMap_RedisCommand<\/span>,<\/span> \"<\/span>write fast<\/span>\"<\/span>,<\/span> 1<\/span>,<\/span> 1<\/span>);<\/span>\r\n\r\n  \/\/<\/span> VCLEAR<\/span> key<\/span>\r\n  CREATE_CMD<\/span>(<\/span>\"<\/span>VCLEAR<\/span>\"<\/span>,<\/span> VClear_RedisCommand<\/span>,<\/span> \"<\/span>write fast<\/span>\"<\/span>,<\/span> 1<\/span>,<\/span> 1<\/span>);<\/span>\r\n\r\n  \/\/<\/span> VADD<\/span> key<\/span> value<\/span> [<\/span>value<\/span> ...]<\/span>\r\n  CREATE_CMD<\/span>(<\/span>\"<\/span>VADD<\/span>\"<\/span>,<\/span> VAdd_RedisCommand<\/span>,<\/span> \"<\/span>write fast<\/span>\"<\/span>,<\/span> 1<\/span>,<\/span> 1<\/span>);<\/span>\r\n\r\n  \/\/<\/span> VGET<\/span> key<\/span> index<\/span>\r\n  CREATE_CMD<\/span>(<\/span>\"<\/span>VGET<\/span>\"<\/span>,<\/span> VGet_RedisCommand<\/span>,<\/span> \"<\/span>readonly fast<\/span>\"<\/span>,<\/span> 1<\/span>,<\/span> 1<\/span>);<\/span>\r\n\r\n  \/\/<\/span> VMGET<\/span> key<\/span> index<\/span> [<\/span>index<\/span> ...]<\/span>\r\n  CREATE_CMD<\/span>(<\/span>\"<\/span>VMGET<\/span>\"<\/span>,<\/span> VMGet_RedisCommand<\/span>,<\/span> \"<\/span>readonly fast<\/span>\"<\/span>,<\/span> 1<\/span>,<\/span> 1<\/span>);<\/span>\r\n\r\n  \/\/<\/span> VSET<\/span> key<\/span> index<\/span> value<\/span> [<\/span>index<\/span> value<\/span> ...]<\/span>\r\n  CREATE_CMD<\/span>(<\/span>\"<\/span>VSET<\/span>\"<\/span>,<\/span> VSet_RedisCommand<\/span>,<\/span> \"<\/span>write fast<\/span>\"<\/span>,<\/span> 1<\/span>,<\/span> 1<\/span>);<\/span>\r\n\r\n  \/\/<\/span> VSIZE<\/span> key<\/span>\r\n  CREATE_CMD<\/span>(<\/span>\"<\/span>VSIZE<\/span>\"<\/span>,<\/span> VSize_RedisCommand<\/span>,<\/span> \"<\/span>readonly fast<\/span>\"<\/span>,<\/span> 1<\/span>,<\/span> 1<\/span>);<\/span>\r\n\r\n  \/\/<\/span> VPOP<\/span> key<\/span>\r\n  CREATE_CMD<\/span>(<\/span>\"<\/span>VPOP<\/span>\"<\/span>,<\/span> VPop_RedisCommand<\/span>,<\/span> \"<\/span>write fast<\/span>\"<\/span>,<\/span> 1<\/span>,<\/span> 1<\/span>);<\/span>\r\n\r\n  return<\/span> REDISMODULE_OK<\/span>;<\/span>\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
\u8fd9\u662f\u7528\u4e8e\u6784\u5efa\u6e90\u4ee3\u7801\u7684Makefile\u3002<\/p>\n
%%<\/span>writefile<\/span> Makefile<\/span>.<\/span>fmmap<\/span>\r\n\r\nSHOBJ_CFLAGS<\/span> ?<\/span>=<\/span> -<\/span>W<\/span> -<\/span>Wall<\/span> -<\/span>fno<\/span>-<\/span>common<\/span> -<\/span>g<\/span> -<\/span>ggdb<\/span> -<\/span>std<\/span>=<\/span>c99<\/span> -<\/span>O2<\/span>\r\nSHOBJ_LDFLAGS<\/span> ?<\/span>=<\/span> -<\/span>shared<\/span>\r\n\r\n.<\/span>SUFFIXES<\/span>:<\/span> .<\/span>c<\/span> .<\/span>so<\/span> .<\/span>xo<\/span> .<\/span>o<\/span>\r\n\r\nall<\/span>:<\/span> fmmap<\/span>.<\/span>so<\/span>\r\n\r\n.<\/span>c<\/span>.<\/span>xo<\/span>:<\/span>\r\n\t$<\/span>(<\/span>CC<\/span>)<\/span> -<\/span>I<\/span>.<\/span> $<\/span>(<\/span>CFLAGS<\/span>)<\/span> $<\/span>(<\/span>SHOBJ_CFLAGS<\/span>)<\/span> -<\/span>fPIC<\/span> -<\/span>c<\/span> $<\/span><<\/span> -<\/span>o<\/span> $<\/span>@<\/span>\r\n\r\nfmmap<\/span>.<\/span>xo<\/span>:<\/span> ..<\/span>\/<\/span>redismodule<\/span>.<\/span>h<\/span>\r\n\r\nfmmap<\/span>.<\/span>so<\/span>:<\/span> fmmap<\/span>.<\/span>xo<\/span>\r\n\t$<\/span>(<\/span>LD<\/span>)<\/span> -<\/span>o<\/span> $<\/span>@<\/span> $<\/span>^<\/span> $<\/span>(<\/span>SHOBJ_LDFLAGS<\/span>)<\/span> $<\/span>(<\/span>LIBS<\/span>)<\/span> -<\/span>lc<\/span>\r\n\r\nclean<\/span>:<\/span>\r\n\trm<\/span> -<\/span>rf<\/span> *<\/span>.<\/span>xo<\/span> *<\/span>.<\/span>so<\/span>\r\n<\/code><\/pre>\n
\u8fdb\u884c\u6a21\u5757\u7684\u6784\u5efa\u3002<\/p>\n
!<\/span>make<\/span> -<\/span>f<\/span> Makefile<\/span>.<\/span>fmmap<\/span>\r\n!<\/span>ls<\/span> fmmap<\/span>.<\/span>so<\/span>\r\n<\/code><\/pre>\n
cc -I.  -W -Wall -fno-common -g -ggdb -std=c99 -O2 -fPIC -c fmmap.c -o fmmap.xo\r\nld -o fmmap.so fmmap.xo -shared  -lc\r\nfmmap.so\r\n<\/code><\/pre>\n
\u6211\u5c06\u5b89\u88c5Redis\u3002<\/p>\n
!<\/span>sudo<\/span> yes<\/span> |<\/span> add<\/span>-<\/span>apt<\/span>-<\/span>repository<\/span> ppa<\/span>:<\/span>redislabs<\/span>\/<\/span>redis<\/span>\r\n!<\/span>sudo<\/span> apt<\/span>-<\/span>get<\/span> update<\/span>\r\n!<\/span>sudo<\/span> apt<\/span>-<\/span>get<\/span> install<\/span> redis<\/span>\r\n<\/code><\/pre>\n
\u5c06\u914d\u7f6e\u6587\u4ef6\u8fdb\u884c\u7f16\u5199\u3002<\/p>\n
%%<\/span>writefile<\/span> -<\/span>a<\/span> \/<\/span>etc<\/span>\/<\/span>redis<\/span>\/<\/span>redis<\/span>.<\/span>conf<\/span>\r\nenable<\/span>-<\/span>module<\/span>-<\/span>command<\/span> yes<\/span>\r\nloadmodule<\/span> \/<\/span>content<\/span>\/<\/span>redis<\/span>-<\/span>stable<\/span>\/<\/span>src<\/span>\/<\/span>modules<\/span>\/<\/span>fmmap<\/span>.<\/span>so<\/span>\r\n<\/code><\/pre>\n
\u8fd0\u884cRedis\u3002<\/p>\n
!<\/span>service<\/span> redis<\/span>-<\/span>server<\/span> start<\/span>\r\n<\/code><\/pre>\n
Starting redis-server: redis-server.\r\n<\/code><\/pre>\n
\u68c0\u67e5\u662f\u5426\u6b63\u5728\u8fd0\u884cRedis\u3002<\/p>\n
!<\/span>sleep<\/span> 1<\/span>\r\n!<\/span>ps<\/span> aux<\/span> |<\/span> grep<\/span> redis<\/span> |<\/span> grep<\/span> -<\/span>v<\/span> grep<\/span>\r\n<\/code><\/pre>\n
redis       3195  0.0  0.0  59132  6380 ?        Ssl  01:21   0:00 \/usr\/bin\/redis-server 127.0.0.1:6379\r\n<\/code><\/pre>\n
\u6211\u4eec\u5c06\u51c6\u5907\u4e00\u4e2a\u6587\u4ef6\u5199\u5165\u7684\u4f4d\u7f6e\u3002<\/p>\n
!<\/span>mkdir<\/span> \/<\/span>content<\/span>\/<\/span>db<\/span>\r\n!<\/span>chmod<\/span> 777<\/span> \/<\/span>content<\/span>\/<\/span>db<\/span>\r\n<\/code><\/pre>\n
\u5c06\u6587\u4ef6\u6620\u5c04\u5230\u6570\u636e\u5e93\u4e2d\u3002\u8fd4\u56de\u503c\u4e3a\u6570\u5b57\u6570\u91cf\uff0c\u56e0\u4e3a\u662f\u65b0\u7684\uff0c\u6240\u4ee5\u4e3a0\u3002<\/p>\n
!<\/span>echo<\/span> \"<\/span>MMAP db \/content\/db\/file.mmap<\/span>\"<\/span> |<\/span> redis<\/span>-<\/span>cli<\/span>\r\n<\/code><\/pre>\n
(integer) 0\r\n<\/code><\/pre>\n
\u786e\u8ba4file.mmap\u6587\u4ef6\u5df2\u7ecf\u521b\u5efa\u3002\u4f46\u6587\u4ef6\u5927\u5c0f\u4ecd\u4e3a0\u3002<\/p>\n
!<\/span>ls<\/span> -<\/span>l<\/span> \/<\/span>content<\/span>\/<\/span>db<\/span>\r\n<\/code><\/pre>\n
total 0\r\n-rw------- 1 redis redis 0 Jun 20 01:21 file.mmap\r\n<\/code><\/pre>\n
\u6211\u5c1d\u8bd5\u6dfb\u52a0\u4e00\u4e2a\u503c\u3002\u8fd4\u56de\u503c\u662f\u6dfb\u52a0\u7684\u6570\u5b57\u6570\u91cf\u3002<\/p>\n
!<\/span>echo<\/span> \"<\/span>VADD db 0.0<\/span>\"<\/span> |<\/span> redis<\/span>-<\/span>cli<\/span>\r\n<\/code><\/pre>\n
(integer) 1\r\n<\/code><\/pre>\n
\u53ef\u4ee5\u786e\u8ba4\u6587\u4ef6\u5927\u5c0f\u5df2\u7ecf\u589e\u52a0\u52308\u5b57\u8282\u3002<\/p>\n
!<\/span>ls<\/span> -<\/span>l<\/span> \/<\/span>content<\/span>\/<\/span>db<\/span>\r\n<\/code><\/pre>\n
total 4\r\n-rw------- 1 redis redis 8 Jun 20 01:21 file.mmap\r\n<\/code><\/pre>\n
\u8ba9\u6211\u4eec\u5c06\u547d\u4ee4\u5199\u5165\u6587\u4ef6\u5e76\u6267\u884c\u4e00\u4e0b\u3002<\/p>\n
%%<\/span>writefile<\/span> command<\/span>\r\nvadd<\/span> db<\/span> 0.1<\/span>\r\nvadd<\/span> db<\/span> 0.2<\/span>\r\nvadd<\/span> db<\/span> 0.3<\/span>\r\nvadd<\/span> db<\/span> 0.4<\/span>\r\nvadd<\/span> db<\/span> 0.5<\/span>\r\nvadd<\/span> db<\/span> 0.6<\/span>\r\nvadd<\/span> db<\/span> 0.7<\/span>\r\nvadd<\/span> db<\/span> 0.8<\/span>\r\nvadd<\/span> db<\/span> 0.9<\/span>\r\nvsize<\/span> db<\/span>\r\n<\/code><\/pre>\n
\u8fd0\u884c\u540e\uff0c\u60a8\u4f1a\u53d1\u73b0\u6ce8\u518c\u6570\u5df2\u7ecf\u8fbe\u5230\u4e8610\u4e2a\u3002<\/p>\n
!<\/span>redis<\/span>-<\/span>cli<\/span> <<\/span> command<\/span>\r\n<\/code><\/pre>\n
(integer) 1\r\n(integer) 1\r\n(integer) 1\r\n(integer) 1\r\n(integer) 1\r\n(integer) 1\r\n(integer) 1\r\n(integer) 1\r\n(integer) 1\r\n(integer) 10\r\n<\/code><\/pre>\n
\u6587\u4ef6\u5927\u5c0f\u589e\u52a0\u5230\u4e8680\u4e2a\u5b57\u8282\u3002<\/p>\n
!<\/span>ls<\/span> -<\/span>l<\/span> \/<\/span>content<\/span>\/<\/span>db<\/span>\r\n<\/code><\/pre>\n
total 4\r\n-rw------- 1 redis redis 80 Jun 20 01:21 file.mmap\r\n<\/code><\/pre>\n
\u60a8\u53ef\u4ee5\u5728\u4e00\u4e2a\u547d\u4ee4\u4e2d\u8fdb\u884c\u591a\u4e2a\u6dfb\u52a0\uff0c\u8fd4\u56de\u6dfb\u52a0\u7684\u503c\u7684\u6570\u91cf\u3002<\/p>\n
!<\/span>echo<\/span> \"<\/span>VADD db 1.0 1.1 1.2 1.3 1.4 1.5<\/span>\"<\/span> |<\/span> redis<\/span>-<\/span>cli<\/span>\r\n<\/code><\/pre>\n
(integer) 6\r\n<\/code><\/pre>\n
\u6211\u5c1d\u8bd5\u63d0\u53d6\u503c\u3002<\/p>\n
!<\/span>echo<\/span> \"<\/span>VGET db 5<\/span>\"<\/span> |<\/span> redis<\/span>-<\/span>cli<\/span>\r\n<\/code><\/pre>\n
\"0.5\"\r\n<\/code><\/pre>\n
\u5982\u679c\u5b58\u5728\u591a\u4e2a\u60c5\u51b5\uff0c\u60c5\u51b5\u5982\u4e0b\u3002\u7531\u4e8e\u6d6e\u70b9\u6570\u5b58\u5728\u8bef\u5dee\u3002<\/p>\n
!<\/span>echo<\/span> \"<\/span>VMGET db 1 2 3 4 5<\/span>\"<\/span> |<\/span> redis<\/span>-<\/span>cli<\/span>\r\n<\/code><\/pre>\n
1) \"0.10000000000000001\"\r\n2) \"0.20000000000000001\"\r\n3) \"0.29999999999999999\"\r\n4) \"0.40000000000000002\"\r\n5) \"0.5\"\r\n<\/code><\/pre>\n
\u60a8\u4e5f\u53ef\u4ee5\u6539\u53d8\u503c\u3002\u5c0650\u8d4b\u7ed9db[5]\uff0c\u5c06100\u8d4b\u7ed9db[10]\u3002VSET\u7684\u8fd4\u56de\u503c\u662f\u5df2\u66f4\u6539\u7684\u4f4d\u7f6e\u6570\u91cf\u3002<\/p>\n
!<\/span>echo<\/span> \"<\/span>VSET db 5 50 10 100<\/span>\"<\/span> |<\/span> redis<\/span>-<\/span>cli<\/span>\r\n!<\/span>echo<\/span> \"<\/span>VMGET db 5 10<\/span>\"<\/span> |<\/span> redis<\/span>-<\/span>cli<\/span>\r\n<\/code><\/pre>\n
(integer) 2\r\n1) \"50\"\r\n2) \"100\"\r\n<\/code><\/pre>\n
\u5c06\u5217\u8868\u7684\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u5f39\u51fa\u5e76\u5220\u9664\u3002<\/p>\n
!<\/span>echo<\/span> \"<\/span>VSIZE db<\/span>\"<\/span> |<\/span> redis<\/span>-<\/span>cli<\/span>\r\n!<\/span>echo<\/span> \"<\/span>VGET db 15<\/span>\"<\/span> |<\/span> redis<\/span>-<\/span>cli<\/span>\r\n!<\/span>echo<\/span> \"<\/span>VPOP db<\/span>\"<\/span> |<\/span> redis<\/span>-<\/span>cli<\/span>\r\n!<\/span>echo<\/span> \"<\/span>VSIZE db<\/span>\"<\/span> |<\/span> redis<\/span>-<\/span>cli<\/span>\r\n<\/code><\/pre>\n
(integer) 16\r\n\"1.5\"\r\n\"1.5\"\r\n(integer) 15\r\n<\/code><\/pre>\n
\u505c\u6b62Redis\u5e76\u91cd\u65b0\u542f\u52a8\u3002<\/p>\n
!<\/span>service<\/span> redis<\/span>-<\/span>server<\/span> stop<\/span>\r\n!<\/span>service<\/span> redis<\/span>-<\/span>server<\/span> start<\/span>\r\n<\/code><\/pre>\n
Stopping redis-server: redis-server.\r\nStarting redis-server: redis-server.\r\n<\/code><\/pre>\n
\u5373\u4f7f\u91cd\u65b0\u542f\u52a8\uff0c\u503c\u4ecd\u7136\u4fdd\u6301\u4e0d\u53d8\u3002<\/p>\n
!<\/span>echo<\/span> \"<\/span>VSIZE db<\/span>\"<\/span> |<\/span> redis<\/span>-<\/span>cli<\/span>\r\n<\/code><\/pre>\n
(integer) 15\r\n<\/code><\/pre>\n
\u5220\u9664\u6570\u636e\u5e93\u540e\uff0c\u53ea\u9700\u8981\u91cd\u65b0\u6620\u5c04\uff0c\u6587\u4ef6\u4ecd\u7136\u4fdd\u6301\u539f\u6837\uff0c\u56e0\u6b64\u53ef\u4ee5\u83b7\u53d6\u503c\u3002<\/p>\n
!<\/span>echo<\/span> \"<\/span>KEYS *<\/span>\"<\/span> |<\/span> redis<\/span>-<\/span>cli<\/span>\r\n!<\/span>echo<\/span> \"<\/span>DEL db<\/span>\"<\/span> |<\/span> redis<\/span>-<\/span>cli<\/span>\r\n!<\/span>echo<\/span> \"<\/span>KEYS *<\/span>\"<\/span> |<\/span> redis<\/span>-<\/span>cli<\/span>\r\n!<\/span>ls<\/span> -<\/span>l<\/span> \/<\/span>content<\/span>\/<\/span>db<\/span>\/<\/span>\r\n!<\/span>echo<\/span> \"<\/span>MMAP dba \/content\/db\/file.mmap<\/span>\"<\/span> |<\/span> redis<\/span>-<\/span>cli<\/span>\r\n!<\/span>echo<\/span> \"<\/span>VGET dba 5<\/span>\"<\/span> |<\/span> redis<\/span>-<\/span>cli<\/span>\r\n<\/code><\/pre>\n
1) \"db\"\r\n(integer) 1\r\n(empty array)\r\ntotal 4\r\n-rw------- 1 redis redis 120 Jun 20 01:21 file.mmap\r\n(integer) 15\r\n\"50\"\r\n<\/code><\/pre>\n
\u8981\u6e05\u9664\u5185\u5bb9\u5c31\u8981\u8fd9\u6837\u505a\u3002<\/p>\n
!<\/span>echo<\/span> \"<\/span>VCLEAR dba<\/span>\"<\/span> |<\/span> redis<\/span>-<\/span>cli<\/span>\r\n!<\/span>echo<\/span> \"<\/span>VSIZE dba<\/span>\"<\/span> |<\/span> redis<\/span>-<\/span>cli<\/span>\r\n<\/code><\/pre>\n
(integer) 15\r\n(integer) 0\r\n<\/code><\/pre>\n
\u6587\u4ef6\u5927\u5c0f\u5c06\u53d8\u4e3a\u96f6\u3002<\/p>\n
!<\/span>ls<\/span> -<\/span>l<\/span> \/<\/span>content<\/span>\/<\/span>db<\/span>\/<\/span>\r\n<\/code><\/pre>\n
total 0\r\n-rw------- 1 redis redis 0 Jun 20 01:21 file.mmap\r\n<\/code><\/pre>\n
\u5220\u9664dba\u3002<\/p>\n
!<\/span>echo<\/span> \"<\/span>DEL dba<\/span>\"<\/span> |<\/span> redis<\/span>-<\/span>cli<\/span>\r\n<\/code><\/pre>\n
(integer) 1\r\n<\/code><\/pre>\n
\u4f7f\u7528Python\u521b\u5efa\u4e00\u4e2a\u5305\u542b100\u4e2adouble\u7684\u6587\u4ef6\u3002<\/p>\n
import<\/span> struct<\/span>\r\nwith<\/span> open<\/span>(<\/span>'<\/span>\/content\/db\/file.mmap<\/span>'<\/span>,<\/span> '<\/span>wb<\/span>'<\/span>)<\/span> as<\/span> fout<\/span>:<\/span>\r\n    for<\/span> i<\/span> in<\/span> range<\/span>(<\/span>100<\/span>):<\/span>\r\n        fout<\/span>.<\/span>write<\/span>(<\/span>struct<\/span>.<\/span>pack<\/span>(<\/span>'<\/span>d<\/span>'<\/span>,<\/span> i<\/span>))<\/span>\r\n<\/code><\/pre>\n
\u6620\u5c04\u6587\u4ef6\u5e76\u67e5\u770b\u5176\u5185\u5bb9\u3002<\/p>\n
!<\/span>echo<\/span> \"<\/span>mmap db \/content\/db\/file.mmap<\/span>\"<\/span> |<\/span> redis<\/span>-<\/span>cli<\/span>\r\n!<\/span>echo<\/span> \"<\/span>vsize db<\/span>\"<\/span> |<\/span> redis<\/span>-<\/span>cli<\/span>\r\n!<\/span>echo<\/span> \"<\/span>vmget db 1 3 5 7 9<\/span>\"<\/span> |<\/span> redis<\/span>-<\/span>cli<\/span>\r\n<\/code><\/pre>\n
(integer) 100\r\n(integer) 100\r\n1) \"1\"\r\n2) \"3\"\r\n3) \"5\"\r\n4) \"7\"\r\n5) \"9\"\r\n<\/code><\/pre>\n
\u505c\u6b62 Redis\u3002\u6ca1\u6709 redis-server\u3002<\/p>\n
!<\/span>echo<\/span> \"<\/span>shutdown<\/span>\"<\/span> |<\/span> redis<\/span>-<\/span>cli<\/span>\r\n!<\/span>sleep<\/span> 1<\/span>\r\n!<\/span>ps<\/span> aux<\/span> |<\/span> grep<\/span> redis<\/span>\r\n<\/code><\/pre>\n
root        3338  0.0  0.0   6904  3172 ?        S    01:21   0:00 \/bin\/bash -c ps aux | grep redis\r\nroot        3340  0.0  0.0   6444   724 ?        S    01:21   0:00 grep redis\r\n<\/code><\/pre>\n
\u6587\u4ef6\u4ecd\u7136\u5b58\u5728\u3002<\/p>\n
!<\/span>ls<\/span> -<\/span>l<\/span> \/<\/span>content<\/span>\/<\/span>db<\/span>\r\n<\/code><\/pre>\n
total 4\r\n-rw------- 1 redis redis 800 Jun 20 01:21 file.mmap\r\n<\/code><\/pre>\n
\u5b8c\u5168\u7ffb\u8bd1\uff1a\u4ee5\u4e0a\u5c31\u662f\u5168\u90e8\u3002
\n\u7b80\u5316\u8868\u8fbe\uff1a\u5c31\u662f\u8fd9\u4e9b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
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