elasticsearch id

Resilience and Efficiency

Faster Restarts and Recoveries with Sequence IDs

One of the biggest features in the 6.0 release is sequence IDs,

which allows for operations-based shard recovery. Previously, 

if a node disconnected from the cluster because of a network problem or a node 

restart, each shard on the node would have to be resynced by comparing segment 

files with the primary shard and copying over any segments that were different. 

This could be a long and costly process, that made even rolling restarts of 

nodes very slow. With sequence IDs, each shard will be able to replay just the 

operations missing from that shard making the recovery process much more efficient.



使用序列ID更快地重新启动和恢复

6.0版本中最大的功能之一是序列ID，它允许基于操作的分片恢复。

以前，如果节点由于网络问题或节点重新启动而与群集断开连接，

则必须通过将段文件与主分片进行比较并复制任何不同的段来重新同步节点上的每个分片。

这可能是一个漫长而昂贵的过程，甚至使节点的滚动重启非常缓慢。使用序列ID，

每个分片将只能重放该分片中缺少的操作，从而使恢复过程更加高效。