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我正在使用 ElasticSearch 1.7.2 版。我想在策展人的帮助下拍一张快照。我按照链接了解它给了我一个增量快照，但我没有得到我的索引的任何增量快照。

我有 1 个索引test，包含 50,000 个文档。我已经对该索引进行了快照。在同一索引中插入 100,000 个文档后，我再次对该索引进行了快照。但是当我检查它时，它在我的两个快照中显示了相同的数据。

它们之间有什么区别？我不认为它是增量的。请帮帮我。

PS：我只想备份剩下的10万，不是全部数据。

输出GET /_snapshot/my_backup/_all：

{
 "snapshots": [
   {
     "snapshot": "curator-20160509052605",
     "version_id": 1070199,
     "version": "1.7.1",
     "indices": [
        "jal"
     ],
     "state": "SUCCESS",
     "start_time": "2016-05-09T05:26:05.735Z",
     "start_time_in_millis": 1462771565735,
     "end_time": "2016-05-09T05:26:06.282Z",
     "end_time_in_millis": 1462771566282,
     "duration_in_millis": 547,
     "failures": [],
     "shards": {
        "total": 5,
        "failed": 0,
        "successful": 5
     }
  },
  {
     "snapshot": "curator-20160509055355",
     "version_id": 1070199,
     "version": "1.7.1",
     "indices": [
        "jal"
     ],
     "state": "SUCCESS",
     "start_time": "2016-05-09T05:53:55.824Z",
     "start_time_in_millis": 1462773235824,
     "end_time": "2016-05-09T05:53:56.737Z",
     "end_time_in_millis": 1462773236737,
     "duration_in_millis": 913,
     "failures": [],
     "shards": {
        "total": 5,
        "failed": 0,
        "successful": 5
     }
  },
  {
     "snapshot": "curator-20160509060002",
     "version_id": 1070199,
     "version": "1.7.1",
     "indices": [
        "jal"
     ],
     "state": "SUCCESS",
     "start_time": "2016-05-09T06:00:02.282Z",
     "start_time_in_millis": 1462773602282,
     "end_time": "2016-05-09T06:00:03.602Z",
     "end_time_in_millis": 1462773603602,
     "duration_in_millis": 1320,
     "failures": [],
     "shards": {
        "total": 5,
        "failed": 0,
        "successful": 5
     }
   }
 ]
 }
4

2 回答 2

1

获取增量快照的不是 Curator，而是 Elasticsearch。而“增量”的意思并不是文档（数据本身）的差异。增量是指磁盘上的段（文件）。

此外，Elasticsearch 会定期合并段。这意味着它需要一系列几乎相同大小的更小（或更大）的段，并将它们合并到一个更大的段中。在创建较大的段之后，ES 正在删除较小的段。

因此，在您添加了 100000 个文档之后，很可能 ES 已经合并了您的旧段（包含前 50k 个文档的段），现在这组段可能是全新的。在这种情况下，当然新快照几乎不包含任何旧段。

要真正测试这一点，在完成索引后，拍摄快照。然后添加 10 个左右的文档，或者更改其中的 10 个，然后再拍摄另一个快照。新快照的大小应该非常小。

于 2016-05-11T06:43:32.613 回答
0 
{
 "snapshots": [
   {
     "snapshot": "curator-20160509052605",
     "version_id": 1070199,
     "version": "1.7.1",
     "indices": [
        "jal"
     ],
     "state": "SUCCESS",
     "start_time": "2016-05-09T05:26:05.735Z",
     "start_time_in_millis": 1462771565735,
     "end_time": "2016-05-09T05:26:06.282Z",
     "end_time_in_millis": 1462771566282,
     "duration_in_millis": 547,
     "failures": [],
     "shards": {
        "total": 5,
        "failed": 0,
        "successful": 5
     }
  },
  {
     "snapshot": "curator-20160509055355",
     "version_id": 1070199,
     "version": "1.7.1",
     "indices": [
        "jal"
     ],
     "state": "SUCCESS",
     "start_time": "2016-05-09T05:53:55.824Z",
     "start_time_in_millis": 1462773235824,
     "end_time": "2016-05-09T05:53:56.737Z",
     "end_time_in_millis": 1462773236737,
     "duration_in_millis": 913,
     "failures": [],
     "shards": {
        "total": 5,
        "failed": 0,
        "successful": 5
     }
  },
  {
     "snapshot": "curator-20160509060002",
     "version_id": 1070199,
     "version": "1.7.1",
     "indices": [
        "jal"
     ],
     "state": "SUCCESS",
     "start_time": "2016-05-09T06:00:02.282Z",
     "start_time_in_millis": 1462773602282,
     "end_time": "2016-05-09T06:00:03.602Z",
     "end_time_in_millis": 1462773603602,
     "duration_in_millis": 1320,
     "failures": [],
     "shards": {
        "total": 5,
        "failed": 0,
        "successful": 5
     }
   }
 ]
 }
于 2016-05-11T10:27:48.247 回答