{"id":397138,"date":"2021-03-18T15:33:40","date_gmt":"2021-03-18T07:33:40","guid":{"rendered":"http:\/\/4563.org\/?p=397138"},"modified":"2021-03-18T15:33:40","modified_gmt":"2021-03-18T07:33:40","slug":"nebula-storage-2-0-%e5%ad%98%e5%82%a8%e6%a0%bc%e5%bc%8f","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=397138","title":{"rendered":"Nebula Storage 2.0 \u5b58\u50a8\u683c\u5f0f"},"content":{"rendered":"
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Nebula Storage 2.0 \u5b58\u50a8\u683c\u5f0f <\/h1>\n

<\/p>\n

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\u8cc7\u6df1\u5927\u4f6c : NebulaGraph <\/span> <\/i> 8<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
<\/p>\n

\"Nebula<\/p>\n

\u968f\u7740 2.0 \u5404\u7248\u672c\u7684\u9646\u7eed\u53d1\u5e03\uff0cNebula Graph \u8fce\u6765\u4e86\u4e00\u7cfb\u5217\u7684\u6539\u52a8\uff0c\u5728\u5b58\u50a8\u65b9\u9762\uff0c\u5f71\u54cd\u6700\u5927\u7684\u6539\u52a8\u5c31\u662f\u5e95\u5c42\u7f16\u7801\u683c\u5f0f\u8fdb\u884c\u4e86\u4fee\u6539<\/strong>\u3002Nebula Graph \u7684\u5e95\u5c42\u5b58\u50a8\u662f\u57fa\u4e8e KV \u4fdd\u5b58\u5728 RocksDB \u4e2d\uff0c\u672c\u6587\u5c06\u4ecb\u7ecd\u65b0\u8001\u7f16\u7801\u683c\u5f0f\u7684\u5dee\u5f02\uff0c\u4ee5\u53ca\u4e3a\u4ec0\u4e48\u8981\u4fee\u6539\u5b58\u50a8\u683c\u5f0f\u7b49\u4e00\u7cfb\u5217\u95ee\u9898\u3002<\/p>\n

1.0 \u7248\u672c\u7684\u683c\u5f0f<\/h2>\n

\u6211\u4eec\u5148\u7b80\u5355\u56de\u987e\u4e0b 1.0 \u7248\u672c\u7684\u7f16\u7801\u683c\u5f0f\uff0c\u4e0d\u719f\u6089\u7684\u53ef\u4ee5\u53c2\u8003\u8fd9\u7bc7\u535a\u5ba2\u300a Nebula \u67b6\u6784\u5256\u6790\u7cfb\u5217\uff08\u4e00\uff09\u56fe\u6570\u636e\u5e93\u7684\u5b58\u50a8\u8bbe\u8ba1\u300b\u3002\u7531\u4e8e\u5728 1.0 \u7248\u672c\u4e2d\uff0c\u70b9\u7684 ID \u53ea\u80fd\u591f\u7528\u6574\u578b\u6765\u8868\u793a\uff0c\u6240\u4ee5\u5e95\u5c42\u6240\u6709 VertexID \u90fd\u662f\u4ee5 int64 \u6765\u4fdd\u5b58\u7684\u3002<\/p>\n

    \n
  • \u70b9\u7684\u683c\u5f0f<\/li>\n<\/ul>\n

    \"Nebula<\/p>\n

      \n
    • \u8fb9\u7684\u683c\u5f0f<\/li>\n<\/ul>\n

      \"Nebula<\/p>\n

      \u7ed9\u5b9a\u4efb\u4f55\u4e00\u4e2a VertexID\uff0c\u7ecf\u8fc7 hash\uff0c\u53ef\u4ee5\u5f97\u5230\u5bf9\u5e94\u7684 PartID\uff0c\u56e0\u6b64\u5bf9\u4e8e\u4e00\u4e2a\u70b9\u548c\u8fd9\u4e2a\u70b9\u7684\u6240\u6709\u8fb9\uff08\u8fb9\u7528\u8d77\u70b9\u8ba1\u7b97 hash \uff09\uff0c\u90fd\u4f1a\u6620\u5c04\u5230\u540c\u4e00\u4e2a\u5206\u7247\u4e2d\u3002\u9700\u8981\u6307\u51fa\u7684\u662f\uff0c\u5728 1.0 \u7248\u672c\u4e2d\uff0c\u70b9\u548c\u8fb9\u7684\u7b2c\u4e00\u4e2a\u5b57\u8282\u7684 Type \u662f\u76f8\u540c\u7684<\/strong>\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u5bf9\u4e8e\u4e00\u4e2a\u70b9\u800c\u8a00\uff0c\u5b83\u7684\u6240\u6709 tag \u5e76\u6ca1\u6709\u5728\u7269\u7406\u4e0a\u8fde\u7eed\u4fdd\u5b58\uff0c\u6bd4\u5982\u53ef\u80fd\u662f\u5982\u4e0b\u4fdd\u5b58\u7684\u3002\u5bf9\u4e8e\u8fd9\u4e2a src \u8fd9\u4e2a\u70b9\u7684\u4e09\u4e2a tag \uff08 tag1 tag2 tag3)\uff0c\u5b9e\u9645\u4e0a\u53ef\u80fd\u4f1a\u88ab\u5176\u4ed6\u8fb9\u9694\u5f00\u3002<\/p>\n

      \"Nebula<\/p>\n

      \u8fd9\u4e2a\u683c\u5f0f\u80fd\u591f\u6ee1\u8db3 1.0 \u7edd\u5927\u591a\u6570\u63a5\u53e3\u7684\u9700\u8981\uff0c\u6bd4\u5982 fetch<\/code> \u548c go<\/code> \u90fd\u53ea\u9700\u8981\u6307\u5b9a\u5bf9\u5e94\u524d\u7f00\uff0c\u5c31\u80fd\u83b7\u53d6\u5bf9\u5e94\u6570\u636e\u3002<\/p>\n

      2.0 \u7248\u672c\u7684\u683c\u5f0f<\/h2>\n

      \u5728 GA \u4e4b\u524d\u53d1\u5e03\u7684\u7248\u672c\uff0c\u5e95\u5c42\u5b58\u50a8\u683c\u5f0f\u5176\u5b9e\u548c 1.0 \u662f\u57fa\u672c\u76f8\u540c\u7684\u3002\u5982\u679c VertexID \u662f\u6574\u578b\uff0c\u548c 1.0 \u683c\u5f0f\u5b8c\u5168\u4e00\u81f4\u3002\u800c\u5982\u679c VertexID \u7c7b\u578b\u652f\u6301 string\uff0c\u5219\u4ece\u5360\u7528 8 \u4e2a\u5b57\u8282\u7684 int64 \u6539\u6210\u4e86\u56fa\u5b9a\u957f\u5ea6\u7684 FIXED_STRING<\/code>\uff0c\u957f\u5ea6\u9700\u8981\u7528\u6237\u5728 create space<\/code> \u65f6\u5019\u6307\u5b9a\u957f\u5ea6\u3002\u5bf9\u4e8e\u4e0d\u8db3\u7684\u957f\u5ea6\u7cfb\u7edf\u81ea\u52a8\u4f7f\u7528 \u0000<\/code> \u8865\u9f50\uff0c\u800c\u8d85\u8fc7\u6307\u5b9a\u957f\u5ea6\u7684 VertexID \u4f1a\u76f4\u63a5\u62a5\u9519\u3002<\/p>\n

      \u5728 GA \u7248\u672c\u4e2d\uff0c\u6211\u4eec\u5bf9\u5e95\u5c42\u5b58\u50a8\u683c\u5f0f\u8fdb\u884c\u4e86\u82e5\u5e72\u6539\u52a8\uff0c\u56e0\u6b64\u8fd9\u6b21\u7248\u672c\u5347\u7ea7\u65f6\u9700\u8981\u901a\u8fc7\u5347\u7ea7\u5de5\u5177\uff0c\u5c06\u539f\u6709\u683c\u5f0f\u7684\u6570\u636e\u8f6c\u6362\u4e3a\u65b0\u683c\u5f0f\u7684\u6570\u636e\u3002\u5982\u4e0b\u662f\u5728 2.0 GA \u7248\u672c\u4e2d\u91c7\u7528\u7684\u5b58\u50a8\u683c\u5f0f\u3002<\/p>\n

      2.0 \u7248\u672c\u5b58\u50a8\u683c\u5f0f<\/h3>\n
        \n
      • \u70b9\u7684\u683c\u5f0f<\/li>\n<\/ul>\n

        \"Nebula<\/p>\n

          \n
        • \u8fb9\u7684\u683c\u5f0f<\/li>\n<\/ul>\n

          \"Nebula<\/p>\n

          \u548c 1.0 \u5b58\u50a8\u683c\u5f0f\u5bf9\u6bd4<\/h3>\n

          \"Nebula<\/p>\n

          \"Nebula<\/p>\n

          \u5176\u4e2d\u6709\u51e0\u4e2a\u6bd4\u8f83\u5927\u7684\u6539\u52a8:<\/p>\n

            \n
          1. VertexID \u7684\u957f\u5ea6\u5982\u524d\u6587\u6240\u8bf4\uff0c\u4ece\u56fa\u5b9a\u7684 8 \u5b57\u8282\uff0c\u4fee\u6539\u4e3a n \u4e2a\u5b57\u8282\u3002VertexID \u7c7b\u578b\u4e3a\u6574\u578b\u65f6\uff0cn \u4e3a 8\uff0cVertexID \u7c7b\u578b\u4e3a string \u7c7b\u578b\u65f6\uff0cn \u4e3a\u6307\u5b9a\u957f\u5ea6\u3002<\/li>\n
          2. \u70b9\u53bb\u6389\u4e86 1.0 \u7684\u65f6\u95f4\u6233\u3002\u8fb9\u5c06 1.0 \u65f6\u95f4\u6233\u6539\u4e3a\u4e86\u4e00\u4e2a\u5b57\u8282\u7684\u5360\u4f4d\u7b26\u3002<\/li>\n
          3. \u5bf9\u4e8e\u70b9\u548c\u8fb9\u7684\u7b2c\u4e00\u4e2a\u5b57\u8282\uff0c\u4e0d\u518d\u4f7f\u7528\u540c\u4e00\u4e2a Type<\/strong>\uff0c\u5728\u7269\u7406\u4e0a\u70b9\u548c\u8fb9\u8fdb\u884c\u4e86\u5206\u79bb\u3002<\/li>\n<\/ol>\n

            \u8fd9\u4e9b\u6539\u52a8\u4e3b\u8981\u662f\u57fa\u4e8e\u4ee5\u4e0b\u51e0\u70b9\u8fdb\u884c\u8003\u8651\u7684\uff1a<\/p>\n

              \n
            1. VertexID \u6539\u53d8\u4e3b\u8981\u662f\u4e3a\u4e86\u652f\u6301 string ID \u540c\u65f6\u517c\u5bb9 1.0 \u7248\u672c int ID \u3002\u5728 storage \u4e2d\uff0c\u628a VertexID \u90fd\u5904\u7406\u4e3a bytes\uff0c\u53ea\u5728\u8fd4\u56de\u7ed3\u679c\u65f6\u6839\u636e space \u7684\u8bbe\u7f6e\u4e0d\u540c\uff0c\u8fd4\u56de\u76f8\u5e94\u7c7b\u578b\u7684 VertexID \u3002
              \n
              \n

              \u4e3a\u4ec0\u4e48 string ID \u8981\u4f7f\u7528 FIXED_STRING ? \u5982\u679c\u4e0d\u4f7f\u7528\u56fa\u5b9a\u957f\u5ea6\uff0c\u5219\u65e0\u6cd5\u4f7f\u7528\u524d\u7f00\u8fdb\u884c\u626b\u63cf\u3002\u901a\u8fc7\u957f\u5ea6\u4e0d\u8db3\u8865\u9f50\uff0c\u4f7f\u5f97\u6240\u6709\u70b9\u4e4b\u95f4\u548c\u8fb9\u4e4b\u95f4\u7684\u5404\u4e2a\u524d\u7f00\u957f\u5ea6\u76f8\u540c\uff0c\u4ece\u800c\u8fdb\u884c\u76f8\u5e94\u7684\u524d\u7f00\u67e5\u8be2\u3002<\/p>\n<\/blockquote>\n<\/li>\n

            2. \u53bb\u6389\u65f6\u95f4\u6233\u4e3b\u8981\u662f\u56e0\u4e3a\u4fdd\u5b58\u591a\u7248\u672c\u6570\u636e\u4f1a\u5f71\u54cd\u6027\u80fd\uff0c\u53e6\u5916\u4e00\u6bb5\u65f6\u95f4\u5185\u6682\u65f6\u4e0d\u8003\u8651\u505a MVCC \u7684\u76f8\u5173\u5de5\u4f5c\u3002
              \n
              \n

              \u5728\u8fb9\u91cc\u9762\u8fd8\u4fdd\u7559\u4e00\u4e2a\u5b57\u8282\u7684\u5360\u4f4d\u7b26\uff0c\u4e3b\u8981\u662f\u7559\u7ed9 TOSS \uff08 transaction on storage side \uff09\u4f7f\u7528\u3002\u4e3b\u8981\u7528\u4e8e\u6807\u8bc6\u4e00\u6761\u8fb9\u7684\u51fa\u8fb9\u548c\u5165\u8fb9\u662f\u5426\u5b8c\u6574\u63d2\u5165\u4e86\uff0c\u8fd9\u91cc\u4e0d\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u540e\u7eed\u4f1a\u6709\u5176\u4ed6\u6587\u7ae0\u8fdb\u884c\u8be6\u5c3d\u7684\u5206\u6790\u3002<\/p>\n<\/blockquote>\n<\/li>\n

            3. \u70b9\u548c\u8fb9\u5206\u79bb\u7684\u597d\u5904\u4e3b\u8981\u662f\u80fd\u591f\u65b9\u4fbf\u5feb\u901f\u62ff\u67d0\u4e2a\u70b9\u7684\u6240\u6709 tag \uff08\u5728 Cypher \u7684 MATCH<\/code> \u8bed\u53e5\u4e2d\u5927\u91cf\u4f7f\u7528\uff09\u3002\u5982\u679c\u6309\u539f\u5148\u540c\u4e00 Type + VertexID<\/code> \u524d\u7f00\u626b\u63cf\uff0c\u7531\u4e8e\u70b9\u8fb9\u53ef\u80fd\u63ba\u6742\u5728\u4e00\u8d77\uff0c\u4f1a\u6781\u5927\u5f71\u54cd\u6027\u80fd\u3002\u800c Type \u5206\u79bb\u4e4b\u540e\uff0c\u6309 VertexType + VertexID<\/code> \u524d\u7f00\u626b\u63cf\uff0c\u53ef\u4ee5\u5feb\u901f\u83b7\u53d6\u6240\u6709 tag \u3002
              \n
              \n

              \u5728 1.0 \u7248\u672c\u4e2d\uff0c\u7531\u4e8e\u6ca1\u6709\u53d6\u67d0\u4e2a\u70b9\u7684\u6240\u6709 tag \u7684\u9700\u6c42\uff0c\u56e0\u6b64\u70b9\u548c\u8fb9\u53ef\u4ee5\u6309\u540c\u4e00\u4e2a\u524d\u7f00\u4fdd\u5b58\u3002\u4e0d\u8fc7\u5728\u4ee3\u7801\u5c42\u9762\uff0c\u8fd8\u662f\u6709\u4e0d\u5c0f\u5f71\u54cd\uff0c\u4f8b\u5982 fetch \u63a5\u53e3\u5728 1.0 \u662f\u6309 VertexID \u7684\u524d\u7f00\u53bb\u626b\u63cf\u7684\uff0c\u5bf9\u4e8e\u8d85\u7ea7\u5927\u70b9\u6765\u8bf4\u53d6 tag \u6027\u80fd\u6bd4\u8f83\u5dee\u3002\u53e6\u5916\u5982\u679c\u4f7f\u7528 storage \u63d0\u4f9b\u7684 scan \u63a5\u53e3\uff0c\u60f3\u8981\u83b7\u53d6\u5168\u56fe\u7684\u6240\u6709\u70b9\uff0c\u5b9e\u9645\u662f\u626b\u63cf\u4e86\u6574\u4e2a RocksDB \u3002<\/p>\n<\/blockquote>\n<\/li>\n<\/ol>\n

              \u9664\u4e86\u70b9\u548c\u8fb9\u7684\u683c\u5f0f\u76f8\u5173\u6539\u52a8\u4e4b\u5916\uff0c\u7d22\u5f15\u7684\u683c\u5f0f\u5176\u5b9e\u4e5f\u6709\u6240\u6539\u53d8\u3002<\/p>\n

              \u4e00\u65b9\u9762\u662f 2.0 \u652f\u6301 NULL<\/code> \u540e\uff0c\u7d22\u5f15\u4e5f\u9700\u8981\u80fd\u591f\u8868\u793a\u5bf9\u5e94\u7684\u8bed\u4e49\u3002\u53e6\u4e00\u65b9\u9762\u662f\u5728 1.0 \u7684\u7248\u672c\u4e2d\uff0c\u5bf9\u4e8e\u7d22\u5f15\u4e2d string \u7684\u5b57\u6bb5\u7684\u5904\u7406\uff0c\u5b9e\u9645\u662f\u6309\u53d8\u957f string \u5904\u7406\u3002\u56e0\u6b64\u5728 LOOKUP<\/code> \u8bed\u53e5\u4e2d\u53ea\u8981\u4f7f\u7528\u4e86\u5e26 string \u5b57\u6bb5\u7684\u7d22\u5f15\uff0c\u5c31\u53ea\u80fd\u4f7f\u7528\u7b49\u503c\u67e5\u8be2\u3002\u800c\u5728 2.0 \u7684\u7248\u672c\u4e2d\uff0c\u7d22\u5f15\u7684 string \u5b57\u6bb5\u548c\u6570\u636e\u4e2d\u7684 VertexID \u4e00\u6837\uff0c\u4f7f\u7528\u56fa\u5b9a\u957f\u5ea6\u7684 FIXED_STRING\uff0cLOOKUP<\/code> \u8bed\u53e5\u4e2d\u5e26 string \u5b57\u6bb5\u7684\u7d22\u5f15\u80fd\u591f\u4f7f\u7528\u8303\u56f4\u67e5\u8be2\uff0c\u4f8b\u5982 LOOKUP ON index1 WHERE col > \"aaa\"<\/code>\u3002\u6709\u5173\u7d22\u5f15\u90e8\u5206\u7684\u529f\u80fd\u548c\u4fee\u6539\uff0c\u540e\u7eed\u4e5f\u4f1a\u518d\u6709\u5176\u4ed6\u6587\u7ae0\u4ecb\u7ecd\u3002<\/p>\n

              \u4ee5\u4e0a\uff0c\u4e3a\u672c\u6b21 Nebula Storage 2.0 \u5b58\u50a8\u683c\u5f0f\u8bb2\u89e3\u3002<\/p>\n

              \u559c\u6b22\u8fd9\u7bc7\u6587\u7ae0\uff1f\u6765\u6765\u6765\uff0c\u7ed9\u6211\u4eec\u7684 GitHub \u70b9\u4e2a star \u8868\u9f13\u52b1\u5566~~ <\/p><\/div>\n

              \u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (0<\/span>) <\/div>\n
              <\/div>\n<\/p><\/div>\n<\/p><\/div>\n
                \n
              • \n","protected":false},"excerpt":{"rendered":"

                Nebula Storage 2.…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/397138"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=397138"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/397138\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=397138"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=397138"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=397138"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}