{"id":34478,"date":"2024-01-05T05:58:53","date_gmt":"2023-07-17T18:08:50","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%bd%93%e7%bc%93%e5%ad%98%e6%9c%8d%e5%8a%a1%e5%99%a8%e8%b7%9d%e7%a6%bb%e8%be%83%e8%bf%9c%ef%bc%8c%e5%bb%b6%e8%bf%9f%e4%bc%9a%e5%a2%9e%e5%8a%a0%e5%90%97%ef%bc%9f%e6%88%91%e5%b0%9d%e8%af%95%e4%bd%bf\/"},"modified":"2024-05-04T16:56:00","modified_gmt":"2024-05-04T08:56:00","slug":"%e5%bd%93%e7%bc%93%e5%ad%98%e6%9c%8d%e5%8a%a1%e5%99%a8%e8%b7%9d%e7%a6%bb%e8%be%83%e8%bf%9c%ef%bc%8c%e5%bb%b6%e8%bf%9f%e4%bc%9a%e5%a2%9e%e5%8a%a0%e5%90%97%ef%bc%9f%e6%88%91%e5%b0%9d%e8%af%95%e4%bd%bf","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%bd%93%e7%bc%93%e5%ad%98%e6%9c%8d%e5%8a%a1%e5%99%a8%e8%b7%9d%e7%a6%bb%e8%be%83%e8%bf%9c%ef%bc%8c%e5%bb%b6%e8%bf%9f%e4%bc%9a%e5%a2%9e%e5%8a%a0%e5%90%97%ef%bc%9f%e6%88%91%e5%b0%9d%e8%af%95%e4%bd%bf\/","title":{"rendered":"\u5f53\u7f13\u5b58\u670d\u52a1\u5668\u8ddd\u79bb\u8f83\u8fdc\uff0c\u5ef6\u8fdf\u4f1a\u589e\u52a0\u5417\uff1f\u6211\u5c1d\u8bd5\u4f7f\u7528ping\u548ctcpdump\u8fdb\u884c\u8ba1\u7b97"},"content":{"rendered":"

\u8fd9\u662f\u4ec0\u4e48\uff1f<\/h1>\n

\u5728\u6211\u7684\u7cfb\u7edf\u4e2d\uff0c\u4ece\u524d\u7aef\u670d\u52a1\u5668\u5230memcached\u670d\u52a1\u5668\u7684\u8fde\u63a5\u6b21\u6570\u76f8\u5f53\u591a\u3002\u5728\u6570\u636e\u4e2d\u5fc3\u4e2d\uff0c\u4ee5\u524d\u524d\u7aef\u670d\u52a1\u5668\u548c\u7f13\u5b58\u670d\u52a1\u5668\u90fd\u5728\u540c\u4e00\u7247\u6bb5\u4e2d\uff0c\u7269\u7406\u4e0a\u4e5f\u5f88\u8fd1\u3002\u7531\u4e8e\u67d0\u79cd\u60c5\u51b5\uff0c\u5fc5\u987b\u66ff\u6362\u670d\u52a1\u5668\uff0c\u6682\u65f6\u5c06\u5176\u653e\u5728\u4e0d\u540c\u7684\u7247\u6bb5\u4e2d\uff0c\u7269\u7406\u4e0a\u4e5f\u66f4\u8fdc\uff0c\u5e76\u4e14\u4e2d\u95f4\u4f1a\u6709\u4e00\u4e9b\u4ea4\u6362\u673a\u548c\u8def\u7531\u5668\u3002\u8fd9\u53ef\u80fd\u5bfc\u81f4\u4ece\u65b0\u7684\u524d\u7aef\u670d\u52a1\u5668\u8fde\u63a5\u5230\u65e7\u7684memcached\u670d\u52a1\u5668\u65f6\u5b58\u5728\u5ef6\u8fdf\u95ee\u9898\u3002\u4ece\u7f51\u7edc\u7684\u89d2\u5ea6\u6765\u770b\uff0c\u8fd9\u662f\u5426\u4f1a\u5728\u5e94\u7528\u7a0b\u5e8f\u7684\u54cd\u5e94\u6027\u80fd\u65b9\u9762\u6210\u4e3a\u95ee\u9898\uff0c\u6216\u8005\u4e0e\u73b0\u5728\u76f8\u6bd4\u5b9e\u9645\u4e0a\u5e76\u4e0d\u91cd\u8981\uff0c\u6211\u5728\u5224\u65ad\u4e4b\u524d\u8003\u8651\u7684\u4e00\u4e9b\u5907\u5fd8\u5f55\u3002<\/p>\n

\u6d4b\u91cf<\/h1>\n

\u6d4b\u91cf\u7684\u65b9\u5f0f<\/h3>\n

\u53d6\u5f97ping\u7684time\u7684100\u6b21\u5e73\u5747\u3002
\nping\u7684time\u662f\u4ec0\u4e48\u610f\u601d\uff1f\u8bf7\u53c2\u8003\u94fe\u63a5\uff1ahttps:\/\/linuxjm.osdn.jp\/html\/netkit\/man8\/ping.8.html<\/p>\n

\u8fdb\u884c\u5f80\u8fd4\u65f6\u95f4\u548c\u4e22\u5305\u6570\u636e\u7684\u7edf\u8ba1\u8ba1\u7b97\u3002<\/p><\/blockquote>\n

\u6240\u4ee5\uff0c\u53ea\u662f\u5f80\u8fd4\u7684\u65f6\u95f4\u3002<\/p>\n

\u5728TCP\u4e2d\uff0c\u5ef6\u8fdf\u662f\u4ec0\u4e48\uff1f\u5728TCP\u4e2d\uff0c\u6bcf\u4e2a\u6570\u636e\u5305\u90fd\u4f1a\u8fdb\u884cACK\uff0c\u56e0\u6b64\u5982\u679c\u8981\u53d1\u9001\u7684\u6570\u636e\u5927\u5c0f\u8f83\u5927\uff0c\u6570\u636e\u5305\u6570\u91cf\u589e\u52a0\uff0c\u5219\u6574\u4f53\u4e0a\u6bcf\u4e2a\u6570\u636e\u5305\u7684\u5ef6\u8fdf\u5c31\u4f1a\u79ef\u7d2f\u3002\u56e0\u6b64\uff0c\u53ef\u4ee5\u8ba4\u4e3aping\u7684\u5f80\u8fd4\u65f6\u95f4\u589e\u52a0\u76f4\u63a5\u5bfc\u81f4\u4e86\u54cd\u5e94\u65f6\u95f4\u7684\u5ef6\u8fdf\u3002<\/p>\n

\u8fdb\u884c\u6d4b\u8bd5\u3002<\/h3>\n

\u5728\u540c\u4e00\u6bb5\u843d\u4e2d\u6709\u4e24\u53f0\u670d\u52a1\u5668\uff0c\u4e00\u53f0\u662f\u65e7\u524d\u7aef\u670d\u52a1\u5668\uff08hoge-old-web\uff09\uff0c\u53e6\u4e00\u53f0\u662f\u65e7\u7f13\u5b58\u670d\u52a1\u5668\uff08hoge-cache\uff09\u3002<\/p>\n

[myuser@hoge-old-web ~]$  ping -c 100 xx.xx.xx.xx > .\/tmp_to_hoge-cache_ping\r\n[myuser@hoge-old-web ~]$ grep \"time=\"  .\/tmp_to_hoge-cache_ping > .\/tmp_to_hoge-cache_latency\r\n[myuser@hoge-old-web ~]$ awk '{print $(NF-1)}' tmp_to_hoge-cache_latency | awk -F'=' '{sum+=$2} END{print sum\/NR}'\r\n0.14284\r\n<\/code><\/pre>\n
\u5927\u7ea60.14\u6beb\u79d2<\/p>\n
\u65b0\u7684front\u670d\u52a1\u5668\uff08hoge-new-web\uff09=\u300b\u65e7\u7684cache\u670d\u52a1\u5668\uff08hoge-cache\uff09<\/p>\n
[root@hoge-new-web ~]# ping -c 100 xx.xx.xx.xx > .\/tmp_to_hoge-cache_ping\r\n[root@hoge-new-web ~]# grep \"time=\"  .\/tmp_to_hoge-cache_ping > .\/tmp_to_hoge-cache_latency\r\n[root@hoge-new-web check_latency]# awk '{print $(NF-1)}' tmp_to_hoge-cache_latency | awk -F'=' '{sum+=$2} END{print sum\/NR}'\r\n0.16793\r\n<\/code><\/pre>\n
\u5927\u7ea60.16\u6beb\u79d2<\/p>\n
Differential<\/h4>\n
0.16793\u51cf\u53bb0.14284\u7b49\u4e8e0.02509\u6beb\u79d2\u3002
\n\u6362\u7b97\u6210\u767e\u5206\u6bd4\uff1a
\n0.02509\u9664\u4ee50.14284\u518d\u4e58\u4ee5100\u7b49\u4e8e17\uff05\u3002<\/p>\n
\u5f53\u8bbf\u95ee\u524d\u7aef\u65f6\uff0cmemcached\u88ab\u9891\u7e41\u8c03\u7528\u4e86\u591a\u5c11\u6b21\uff1f<\/h4>\n
\u8c03\u7528\u4ee3\u7801\u4e2d\u7f13\u5b58\u65b9\u6cd5\u7684\u6b21\u6570\u5f88\u91cd\u8981\uff0c\u4f46\u8981\u8003\u8651\u6574\u4e2a\u5ef6\u8fdf\uff0c\u91cd\u8981\u7684\u662f\u77e5\u9053\u6709\u591a\u5c11\u6570\u636e\u5305\u88ab\u53d1\u9001\u3002\u56e0\u6b64\uff0c\u6211\u60f3\u7528tcpdump\u6765\u786e\u8ba4\u53d1\u9001\u4e86\u591a\u5c11\u6570\u636e\u5305\u3002<\/p>\n
myuser@hoge-dev-web [~ ] $ sudo tcpdump -i eth0 > .\/tmp_tcpdump_to_memcache\r\ntcpdump: verbose output suppressed, use -v or -vv for full protocol decode\r\nlistening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes\r\n^C7136 packets captured\r\n7136 packets received by filter   \/\/ \u5168\u90e8\u3067\u3053\u308c\u3060\u3051\u306e\u30d1\u30b1\u30c3\u30c8\u304c1\u30ea\u30af\u30a8\u30b9\u30c8\u3067\u901a\u3063\u305f\r\n0 packets dropped by kernel\r\n<\/code><\/pre>\n
\u5728\u5176\u4e2d\u8fde\u63a5\u5230memcached\u7684\u662f\u4ec0\u4e48\uff1f<\/p>\n
myuser@hoge-dev-web [~ ] $ grep \"xx.xx.xx.xx.11211 >\" tmp_tcpdump_to_memcache -c\r\n1579\r\n<\/code><\/pre>\n
\u6765\u81eamemcached\u7684\u6570\u636e\u5305\u67091579\u4e2a\u8bf7\u6c42\u3002\uff08\u8fd4\u56de\u4e5f\u6709\u76f8\u540c\u6570\u91cf\u7684\u6570\u636e\u5305\u3002\u7531\u4e8eping\u7684\u65f6\u95f4\u662fRTT\uff0c\u6240\u4ee5\u53ea\u9700\u8981\u77e5\u9053\u901a\u8fc7\u5176\u4e2d\u4e00\u6761\u8def\u5f84\u7684\u6b21\u6570\u5373\u53ef\u3002\uff09<\/p>\n
\u6700\u5927\u5ef6\u8fdf\u4f1a\u589e\u957f\u591a\u4e45\uff1f<\/h4>\n
\u6bcf\u4e2a\u6570\u636e\u5305\u7684\u5ef6\u8fdf\u4e3a0.02509\u6beb\u79d2*1579=39.6\u6beb\u79d2\u3002\u51e0\u4e4e\u6ca1\u6709\u8bef\u5dee\uff0c\u770b\u8d77\u6765\u4e0d\u9700\u8981\u592a\u5728\u610f\u3002<\/p>\n
\u603b\u7ed3<\/h1>\n
\u8fd9\u6b21\u7684\u4e8b\u60c5\uff0c\u4f60\u4e0d\u9700\u8981\u592a\u5728\u610f\u5ef6\u8fdf\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u8fd9\u662f\u4ec0\u4e48\uff1f \u5728\u6211\u7684\u7cfb\u7edf\u4e2d\uff0c\u4ece\u524d\u7aef\u670d\u52a1\u5668\u5230memcached\u670d\u52a1\u5668\u7684\u8fde\u63a5\u6b21\u6570\u76f8\u5f53\u591a\u3002\u5728\u6570\u636e\u4e2d\u5fc3\u4e2d\uff0c\u4ee5\u524d\u524d\u7aef\u670d\u52a1\u5668 […]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-34478","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\n\u5f53\u7f13\u5b58\u670d\u52a1\u5668\u8ddd\u79bb\u8f83\u8fdc\uff0c\u5ef6\u8fdf\u4f1a\u589e\u52a0\u5417\uff1f\u6211\u5c1d\u8bd5\u4f7f\u7528ping\u548ctcpdump\u8fdb\u884c\u8ba1\u7b97 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u5f53\u7f13\u5b58\u670d\u52a1\u5668\u8ddd\u79bb\u8f83\u8fdc\uff0c\u5ef6\u8fdf\u4f1a\u589e\u52a0\u5417\uff1f\u6211\u5c1d\u8bd5\u4f7f\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u5f53\u7f13\u5b58\u670d\u52a1\u5668\u8ddd\u79bb\u8f83\u8fdc\uff0c\u5ef6\u8fdf\u4f1a\u589e\u52a0\u5417\uff1f\u6211\u5c1d\u8bd5\u4f7f\u7528ping\u548ctcpdump\u8fdb\u884c\u8ba1\u7b97\" \/>\n<meta property=\"og:description\" content=\"\u8fd9\u662f\u4ec0\u4e48\uff1f \u5728\u6211\u7684\u7cfb\u7edf\u4e2d\uff0c\u4ece\u524d\u7aef\u670d\u52a1\u5668\u5230memcached\u670d\u52a1\u5668\u7684\u8fde\u63a5\u6b21\u6570\u76f8\u5f53\u591a\u3002\u5728\u6570\u636e\u4e2d\u5fc3\u4e2d\uff0c\u4ee5\u524d\u524d\u7aef\u670d\u52a1\u5668 […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u5f53\u7f13\u5b58\u670d\u52a1\u5668\u8ddd\u79bb\u8f83\u8fdc\uff0c\u5ef6\u8fdf\u4f1a\u589e\u52a0\u5417\uff1f\u6211\u5c1d\u8bd5\u4f7f\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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