Elasticsearch-删除索引并重新创建索引 [英] Elasticsearch - Delete index and re-create index

问题描述

如果我删除具有大数据的索引并在执行创建索引后立即创建索引(相同的索引名称)会发生什么情况?插入文件?

What Happen if I delete a index that has big data and right after executed create index (same index name) & insert document?

弹性搜索将保证有序进行吗?或有某种方式可以通过大规模传播?

Elastic search will guarantee to proceed orderly? or somehow there is passible to mass it up?

推荐答案

这将按预期工作.我假设您担心数据的删除将花费很长时间，并且您可能在Elasticsearch完成删除旧索引之前重新创建相同的索引名称?

This will work as expected. I assume you are concerned that the deletion of the data will take a long time and you might recreate the same index name before Elasticsearch finished removing the old one?

实际上，文件系统上没有使用索引名，而是为每个索引分配了一个UUID，用于存储(至少在5.x中).请参阅以下有关5.5.0的示例:

Actually, index names are not used on the filesystem and every index gets assigned a UUID instead, which is used for storage (at least in 5.x). See the following example on 5.5.0:

$ curl -XPUT -u "elastic:changeme" localhost:9200/test
{"acknowledged":true,"shards_acknowledged":true}

$ curl -XGET -u "elastic:changeme" localhost:9200/_cat/indices/test?v
health status index uuid                   pri rep docs.count docs.deleted store.size pri.store.size
yellow open   test  lwk6SME0SGaits-l2Y-DJg   5   1          0            0       810b           810b

$ ls /var/lib/elasticsearch/nodes/0/indices/lwk6SME0SGaits-l2Y-DJg/
0/      1/      2/      3/      4/      _state/ 

$ curl -XDELETE -u "elastic:changeme" localhost:9200/test
{"acknowledged":true}

$ curl -XPUT -u "elastic:changeme" localhost:9200/test
{"acknowledged":true,"shards_acknowledged":true}

$ curl -XGET -u "elastic:changeme" localhost:9200/_cat/indices/test?v
health status index uuid                   pri rep docs.count docs.deleted store.size pri.store.size
yellow open   test  cCJAB5i-Qjes7OUUo1m63w   5   1          0            0       810b           810b

$ ls /var/lib/elasticsearch/nodes/0/indices/cCJAB5i-Qjes7OUUo1m63w/
0  1  2  3  4  _state

$ ls /var/lib/elasticsearch/nodes/0/indices/lwk6SME0SGaits-l2Y-DJg/
ls: cannot access '/var/lib/elasticsearch/nodes/0/indices/lwk6SME0SGaits-l2Y-DJg/': No such file or directory

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