{"id":50216,"date":"2023-09-26T18:01:37","date_gmt":"2024-02-03T16:52:27","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e9%80%9a%e8%bf%87-astradb-cassandra-%e5%ae%9e%e7%8e%b0%e5%90%91%e9%87%8f%e6%90%9c%e7%b4%a2-%e9%80%9a%e8%bf%87%e6%9c%80%e5%b0%91%e7%9a%84%e4%bb%a3%e7%a0%81%e8%bf%9b%e8%a1%8c%e7%90%86%e8%a7%a3\/"},"modified":"2024-05-04T01:41:45","modified_gmt":"2024-05-03T17:41:45","slug":"%e9%80%9a%e8%bf%87-astradb-cassandra-%e5%ae%9e%e7%8e%b0%e5%90%91%e9%87%8f%e6%90%9c%e7%b4%a2-%e9%80%9a%e8%bf%87%e6%9c%80%e5%b0%91%e7%9a%84%e4%bb%a3%e7%a0%81%e8%bf%9b%e8%a1%8c%e7%90%86%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e9%80%9a%e8%bf%87-astradb-cassandra-%e5%ae%9e%e7%8e%b0%e5%90%91%e9%87%8f%e6%90%9c%e7%b4%a2-%e9%80%9a%e8%bf%87%e6%9c%80%e5%b0%91%e7%9a%84%e4%bb%a3%e7%a0%81%e8%bf%9b%e8%a1%8c%e7%90%86%e8%a7%a3\/","title":{"rendered":"\u901a\u8fc7 AstraDB\/Cassandra \u5b9e\u73b0\u5411\u91cf\u641c\u7d22-\u901a\u8fc7\u6700\u5c11\u7684\u4ee3\u7801\u8fdb\u884c\u7406\u89e3"},"content":{"rendered":"<h1>\u9996\u5148<\/h1>\n<h2>\u662f\u4ec0\u9ebc\uff1f<\/h2>\n<p>\u672c\u6587\u7684\u76ee\u7684\u662f\u4ec0\u9ebc\uff1f<\/p>\n<p>\u4f60\u662f\u5426\u4e86\u89e3\u5411\u91cf\u641c\u7d22\uff1f<\/p>\n<p>\u5728\u8fd9\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u4eec\u5047\u8bbe\u8bfb\u8005\u5df2\u7ecf\u5bf9&#8221;\u5411\u91cf\u641c\u7d22&#8221;\u6709\u4e00\u5b9a\u4e86\u89e3\uff0c\u5e76\u65e8\u5728\u4ecb\u7ecd\u4e00\u79cd\u65b0\u7684\u6267\u884c\u8be5\u64cd\u4f5c\u7684\u65b9\u6cd5\u3002\u6211\u4eec\u5e0c\u671b\u80fd\u591f\u7b80\u6d01\u660e\u4e86\u5730\u4f20\u8fbe\u7ed9\u6280\u672f\u4eba\u5458\u6240\u9700\u7684\u5b9e\u8d28\u6027\u4fe1\u606f\uff0c\u4ee5\u5e2e\u52a9\u4ed6\u4eec\u5efa\u7acb\u4e00\u4e2a\u5177\u4f53\u7684\u6982\u5ff5\u3002<\/p>\n<p>\u8bf7\u5c06\u4ee5\u4e0b\u5185\u5bb9\u7528\u4e2d\u6587\u8fdb\u884c\u91cd\u8ff0\uff0c\u53ea\u9700\u8981\u4e00\u4e2a\u9009\u9879\uff1a\u5047\u8bbe\u8bfb\u8005\u5df2\u7ecf\u6709\u5bf9Cassandra\u548cAstraDB\u7684\u57fa\u672c\u7406\u89e3\u3002<\/p>\n<p>\u901a\u904e\u95b1\u8b80\u9019\u7bc7\u6587\u7ae0\uff1a<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30d9\u30af\u30c8\u30eb\u691c\u7d22\u306e\u5b9f\u884c\u306b\u3064\u3044\u3066\u3001\u4ed6\u306e\u30c6\u30af\u30ce\u30ed\u30b8\u30fc\u3067\u306e\u7d4c\u9a13\u306e\u3042\u308b\u4eba\u306f\u3001\u65b0\u3057\u3044\u5b9f\u884c\u624b\u6bb5\u3068\u3057\u3066\u3001\u30a4\u30e1\u30fc\u30b8\u3092\u6301\u3064\u3053\u3068\u304c\u3067\u304d\u308b\u3067\u3057\u3087\u3046\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Cassandra\u3068Python\u30e9\u30a4\u30d6\u30e9\u30ea\u306b\u3064\u3044\u3066\u306e\u77e5\u8b58\u304c\u3042\u308c\u3070\u3001\u4f55\u304c\u304a\u3053\u306a\u308f\u308c\u3066\u3044\u308b\u304b\u3001\u3055\u3089\u306b\u5177\u4f53\u7684\u306b\u7406\u89e3\u3067\u304d\u308b\u3067\u3057\u3087\u3046\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">AstraDB\u306b\u3064\u3044\u3066\u306e\u77e5\u8b58\u3001\u3042\u308b\u3044\u306f\u95a2\u5fc3\u304c\u3042\u308c\u3070\u3001\u5b9f\u969b\u306bAstraDB\u3092\u4f7f\u3063\u3066\u3001\u30d9\u30af\u30c8\u30eb\u691c\u7d22\u3092\u5b9f\u884c\u3059\u308b\u3053\u3068\u3082\u96e3\u3057\u304f\u306a\u3044\u3067\u3057\u3087\u3046\u3002<\/ul>\n<h1>\u4ecb\u7ecd\uff082023\u5e746\u6708\uff09<\/h1>\n<h3>Apache Caddandre\uff1aCEP-30\uff1a\u901a\u8fc7\u5b58\u50a8\u9644\u5c5e\u7d22\u5f15\u8fdb\u884c\u8fd1\u4f3c\u6700\u8fd1\u90bb\uff08ANN\uff09\u5411\u91cf\u641c\u7d22\u3002<\/h3>\n<p>&nbsp;<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d8ffb913a08637a6dab5c\/10-0.png\" alt=\"image.png\" \/><\/div>\n<p>\u72b6\u6001\u5df2\u66f4\u6539\u4e3a\u201c\u5df2\u91c7\u7eb3\u201d\u3002<\/p>\n<h3>AstraDB \u963f\u65af\u7279\u62c9\u6570\u636e\u5e93<\/h3>\n<p>\u4ee5\u4e0a\u7684\u529f\u80fd\u53ef\u4ee5\u7528\u4f5c\u9884\u89c8\u3002<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d8ffb913a08637a6dab5c\/14-0.png\" alt=\"image.png\" \/><\/div>\n<p>\u70b9\u51fb\u4e0a\u8ff0\u6309\u94ae\u521b\u5efa\u65b0\u7684\u6570\u636e\u5e93\uff0c\u5c06\u751f\u6210\u4e00\u4e2a\u9884\u89c8\u6a21\u5f0f\u7684\u6570\u636e\u5e93\uff0c\u5e76\u5728\u6982\u89c8\u9875\u9762\u4e2d\u663e\u793aVector Search\u6587\u6863\u7684\u94fe\u63a5\uff0c\u5982\u4e0b\u6240\u793a\u3002<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d8ffb913a08637a6dab5c\/16-0.png\" alt=\"image.png\" \/><\/div>\n<p>&nbsp;<\/p>\n<h1>\u5b9e\u8df5<\/h1>\n<h2>\u57fa\u672c\u7684\u6d41\u7a0b<\/h2>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u5c06\u503c\u5411\u91cf\u5316<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u6267\u884c\u6570\u636e\u96c6\u7684\u6ce8\u518c\u548c\u7d22\u5f15\u5316<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\u6267\u884c\u5411\u91cf\u641c\u7d22<\/ol>\n<h2>\u5c06\u503c\u8fdb\u884c\u5411\u91cf\u5316<\/h2>\n<p>\u5728\u8fd9\u91cc\uff0c\u6211\u4eec\u4f7f\u7528SentenceTransformers\u7684MiniLM\u3002<\/p>\n<p>&nbsp;<\/p>\n<pre class=\"post-pre\"><code>!pip sentence-transformers\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"kn\">from<\/span> <span class=\"n\">sentence_transformers<\/span> <span class=\"kn\">import<\/span> <span class=\"n\">SentenceTransformer<\/span>\r\n<span class=\"n\">transformer<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">SentenceTransformer<\/span><span class=\"p\">(<\/span><span class=\"sh\">'<\/span><span class=\"s\">sentence-transformers\/all-MiniLM-L6-v2<\/span><span class=\"sh\">'<\/span><span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"n\">embedding<\/span> <span class=\"o\">=<\/span> <span class=\"n\">transformer<\/span><span class=\"p\">.<\/span><span class=\"nf\">encode<\/span><span class=\"p\">(<\/span><span class=\"n\">text<\/span><span class=\"p\">).<\/span><span class=\"nf\">tolist<\/span><span class=\"p\">()<\/span>\r\n<\/code><\/pre>\n<h2>\u6ce8\u518c\u548c\u7d22\u5f15\u5316\u6570\u636e\u96c6<\/h2>\n<h3>\u6570\u636e\u8868\u5b9a\u4e49<\/h3>\n<p>\u5b58\u50a8\u5411\u91cf\u6570\u636e\u7684\u8868\u5b9a\u4e49\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"n\">session<\/span><span class=\"p\">.<\/span><span class=\"nf\">execute<\/span><span class=\"p\">(<\/span><span class=\"sa\">f<\/span><span class=\"sh\">\"\"\"<\/span><span class=\"s\">CREATE TABLE IF NOT EXISTS vector_preview.products_table\r\n(product_id int,\r\n chunk_id int,\r\n \r\n product_name text,\r\n description text,\r\n price text,\r\n \r\n description_embedding vector&lt;float, 384&gt;,\r\n \r\n PRIMARY KEY (product_id, chunk_id))<\/span><span class=\"sh\">\"\"\"<\/span><span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<h3>\u6307\u6807\u5b9a\u4e49<\/h3>\n<p>\u521b\u5efa\u7d22\u5f15\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"n\">session<\/span><span class=\"p\">.<\/span><span class=\"nf\">execute<\/span><span class=\"p\">(<\/span><span class=\"sa\">f<\/span><span class=\"sh\">\"\"\"<\/span><span class=\"s\">CREATE CUSTOM INDEX IF NOT EXISTS minilm_desc ON vector_preview.products_table (description_embedding) USING <\/span><span class=\"sh\">'<\/span><span class=\"s\">org.apache.cassandra.index.sai.StorageAttachedIndex<\/span><span class=\"sh\">'\"\"\"<\/span><span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<h3>\u6570\u636e\u5f55\u5165<\/h3>\n<pre class=\"post-pre\"><code><span class=\"n\">query<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">SimpleStatement<\/span><span class=\"p\">(<\/span>\r\n                <span class=\"sa\">f<\/span><span class=\"sh\">\"\"\"<\/span><span class=\"s\">\r\n                INSERT INTO vector_preview.products_table\r\n                (product_id, chunk_id, product_name, description, price, description_embedding)\r\n                VALUES (%s, %s, %s, %s, %s, %s)\r\n                <\/span><span class=\"sh\">\"\"\"<\/span>\r\n            <span class=\"p\">)<\/span>\r\n    <span class=\"nf\">display<\/span><span class=\"p\">(<\/span><span class=\"n\">row<\/span><span class=\"p\">)<\/span>\r\n\r\n    <span class=\"n\">session<\/span><span class=\"p\">.<\/span><span class=\"nf\">execute<\/span><span class=\"p\">(<\/span><span class=\"n\">query<\/span><span class=\"p\">,<\/span> <span class=\"p\">(<\/span><span class=\"n\">product_id<\/span><span class=\"p\">,<\/span> <span class=\"n\">chunk_id<\/span><span class=\"p\">,<\/span> <span class=\"n\">product_name<\/span><span class=\"p\">,<\/span> <span class=\"n\">description<\/span><span class=\"p\">,<\/span> <span class=\"n\">pricevalue<\/span><span class=\"p\">,<\/span> <span class=\"n\">embedding<\/span><span class=\"p\">))<\/span>\r\n<\/code><\/pre>\n<h2>\u6267\u884c\u5411\u91cf\u641c\u7d22<\/h2>\n<pre class=\"post-pre\"><code><span class=\"n\">query<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">SimpleStatement<\/span><span class=\"p\">(<\/span>\r\n    <span class=\"sa\">f<\/span><span class=\"sh\">\"\"\"<\/span><span class=\"s\">\r\n    SELECT *\r\n    FROM demo.products_table\r\n    ORDER BY description_embedding ANN OF <\/span><span class=\"si\">{<\/span><span class=\"n\">embedding<\/span><span class=\"si\">}<\/span><span class=\"s\"> LIMIT 5;\r\n    <\/span><span class=\"sh\">\"\"\"<\/span>\r\n    <span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"n\">results<\/span> <span class=\"o\">=<\/span> <span class=\"n\">session<\/span><span class=\"p\">.<\/span><span class=\"nf\">execute<\/span><span class=\"p\">(<\/span><span class=\"n\">query<\/span><span class=\"p\">)<\/span>\r\n<span class=\"n\">top_5_products<\/span> <span class=\"o\">=<\/span> <span class=\"n\">results<\/span><span class=\"p\">.<\/span><span class=\"n\">_current_rows<\/span>\r\n\r\n<span class=\"k\">for<\/span> <span class=\"n\">row<\/span> <span class=\"ow\">in<\/span> <span class=\"n\">top_5_products<\/span><span class=\"p\">:<\/span>\r\n  <span class=\"nf\">print<\/span><span class=\"p\">(<\/span><span class=\"sa\">f<\/span><span class=\"sh\">\"\"\"<\/span><span class=\"si\">{<\/span><span class=\"n\">row<\/span><span class=\"p\">.<\/span><span class=\"n\">product_id<\/span><span class=\"si\">}<\/span><span class=\"s\">, <\/span><span class=\"si\">{<\/span><span class=\"n\">row<\/span><span class=\"p\">.<\/span><span class=\"n\">product_name<\/span><span class=\"si\">}<\/span><span class=\"s\">, <\/span><span class=\"si\">{<\/span><span class=\"n\">row<\/span><span class=\"p\">.<\/span><span class=\"n\">description<\/span><span class=\"si\">}<\/span><span class=\"s\">, <\/span><span class=\"si\">{<\/span><span class=\"n\">row<\/span><span class=\"p\">.<\/span><span class=\"n\">price<\/span><span class=\"si\">}<\/span><span class=\"se\">\\n<\/span><span class=\"sh\">\"\"\"<\/span><span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<h2>\u6700\u540e<\/h2>\n<p>\u672c\u7bc7\u6587\u7ae0\u7684\u64b0\u5199\u4e3b\u8981\u662f\u4e3a\u4e86\u6574\u7406\u6211\u81ea\u5df1\u7684\u7406\u89e3\uff0c\u4f46\u662f\u6211\u610f\u8bc6\u5230\u53ef\u80fd\u6709\u5f88\u591a\u4eba\u4f1a\u8ba4\u4e3a\u89e3\u91ca\u4e0d\u591f\u53cb\u5584\u3002\u7136\u800c\uff0c\u6b63\u5982\u6211\u5728\u5f00\u5934\u6574\u7406\u7684\u90a3\u6837\uff0c\u5982\u679c\u6211\u4eec\u80fd\u591f\u5efa\u7acb\u8d77\u524d\u63d0\uff0c\u6211\u5e0c\u671b\u5185\u5bb9\u4f20\u8fbe\u5f97\u66f4\u52a0\u7b80\u6d01\u660e\u4e86\u3002<\/p>\n<h2>\u8865\u5145\uff082023\u5e747\u670819\u65e5\uff09<\/h2>\n<h3>AstraDB \u7684\u5411\u91cf\u641c\u7d22\u529f\u80fd\u5df2\u7ecf\u6b63\u5f0f\u63a8\u51fa\u3002<\/h3>\n<p>2023\u5e747\u670818\u65e5\uff0c\u6211\u4eec\u5728\u4e0a\u8ff0\u4e2d\u4ecb\u7ecd\u7684AstraDB\u7684\u5411\u91cf\u641c\u7d22\u529f\u80fd\u5df2\u7ecf\u8f6c\u4e3a\u6b63\u5f0f\u53ef\u7528\uff0c\u5e76\u53ef\u5728\u751f\u4ea7\u73af\u5883\u4e2d\u4f7f\u7528\u3002<\/p>\n<h3>\u793a\u4f8b\/\u6559\u7a0b<\/h3>\n<p>\u5728\u4e0b\u65b9\u7684GitHub\u5b58\u50a8\u5e93\u4e2d\uff0c\u6211\u4eec\u516c\u5f00\u4e86\u53ef\u4ee5\u9a8c\u8bc1\u5176\u8fd0\u884c\u60c5\u51b5\u7684\u6837\u672c\/\u6559\u7a0b\uff08\u89e3\u91ca\u548c\u8bc4\u8bba\u63d0\u4f9b\u4e86\u82f1\u8bed\u548c\u65e5\u8bed\uff09\uff0c\u8be5\u6837\u672c\/\u6559\u7a0b\u662fApache Cassandra\u7684\u5411\u91cf\u641c\u7d22\u6269\u5c55\u529f\u80fd\uff0c\u4ec5\u4ecb\u7ecd\u4e86\u5176\u7cbe\u534e\u3002<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u9996\u5148 \u662f\u4ec0\u9ebc\uff1f \u672c\u6587\u7684\u76ee\u7684\u662f\u4ec0\u9ebc\uff1f 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