Elasticsearch的一些api随记：修订间差异

来自三线的随记
可视化wikitext
小无编辑摘要
小无编辑摘要
第14行： 第14行：
  /_cat/nodes?v
  /_cat/nodes?v


=== Get master node ===
===Get master node===
  /_cat/master?v
  /_cat/master?v


第87行： 第87行：
====get indices and order by number of replicas====
====get indices and order by number of replicas====
  /_cat/indices?health=green&v&s=rep:asc,store.size:desc,index
  /_cat/indices?health=green&v&s=rep:asc,store.size:desc,index
  [[分类:Elasticsearch]]
 
 
=== Demo ===
 
==== 对于有大量索引的刚重启的es集群 ====
(主分片在1w-2w)
 
如果需要加快集群恢复速度，可以结合es节点资源监控图，观测节点cpu压力，以及cpu IO wait
 
适当通过update cluster settings接口动态增加node_initial_primaries_recoveries (Defaults to <code>4</code>)
 
和 node_concurrent_recoveries
 
(A shortcut to set both <code>cluster.routing.allocation.node_concurrent_incoming_recoveries</code> and <code>cluster.routing.allocation.node_concurrent_outgoing_recoveries</code>  
 
Defaults to <code>2</code>)数值
 
通过使用 cluster settings + include_defaults=true 筛选查到当前配置值
 
 
减少集群从red状态到yellow状态的耗时：增加索引副本数量，增加node_initial_primaries_recoveries值
 
 
减少集群从yellow状态到green状态的耗时：增加 node_concurrent_recoveries 值
 
 
可以通过访问 <code>/_cluster/allocation/explain</code> 接口查到阻碍集群 to green(yellow)的原因
[[分类:Elasticsearch]]
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{{DEFAULTSORT:api随记}}

2021年4月15日 (四) 02:18的版本

Health

/_cat/health

/_cluster/health

Indices health

/_cat/indices?health=red&v&s=store.size:desc,index

/_cat/indices?health=yellow&v&s=store.size:desc,index

/_cat/indices?health=green&v&s=store.size:desc,index

Nodes

/_cat/nodes?v

Get master node

/_cat/master?v

Cluster allocation explain related

/_cat/shards/index_name-*?v&s=state,index&h=index,shard,prirep,state,docs,store,ip,node,unassigned.reason

/_cluster/allocation/explain

Shards

/_cat/shards

/_cat/shards?index=index_name


Thread pool related

https://www.elastic.co/guide/en/elasticsearch/reference/current/cat-thread-pool.html 

/_cluster/settings?pretty&include_defaults=true | grep processors

get maximum number of threads info

curl "127.1:9200/_cat/thread_pool?v&h=ip,node_name,id,name,max,size,queue_size,queue,active,rejected&pretty"


Cluster settings

/_cluster/settings?include_defaults=true&pretty

/_cluster/settings?include_defaults=true

primaries recovery settings

{
    "transient": {
        "cluster": {
            "routing": {
                "allocation": {
                    "node_initial_primaries_recoveries": 10,
                    "node_concurrent_incoming_recoveries": null,
                    "node_concurrent_outgoing_recoveries": null,
                    "node_concurrent_recoveries": 20
                }
            }
        }
    }
}
- new version shard allocation config
cluster.routing.allocation.node_concurrent_recoveries
# es 6.8.2
# PUT /_cluster/settings
{
    "persistent": {
        "cluster": {
            "routing": {
                "allocation": {
                    "node_initial_primaries_recoveries": 8
                }
            }
        }
    }
}


Index settings

modify the number of replicas in bulk

{
  "index" : {
    "number_of_replicas" : 1
  }
}

get indices and order by number of replicas

/_cat/indices?health=green&v&s=rep:asc,store.size:desc,index


Demo

对于有大量索引的刚重启的es集群

(主分片在1w-2w)

如果需要加快集群恢复速度，可以结合es节点资源监控图，观测节点cpu压力，以及cpu IO wait

适当通过update cluster settings接口动态增加node_initial_primaries_recoveries (Defaults to 4)

和 node_concurrent_recoveries

(A shortcut to set both cluster.routing.allocation.node_concurrent_incoming_recoveries and cluster.routing.allocation.node_concurrent_outgoing_recoveries

Defaults to 2)数值

通过使用 cluster settings + include_defaults=true 筛选查到当前配置值


减少集群从red状态到yellow状态的耗时：增加索引副本数量，增加node_initial_primaries_recoveries值


减少集群从yellow状态到green状态的耗时：增加 node_concurrent_recoveries 值


可以通过访问 /_cluster/allocation/explain 接口查到阻碍集群 to green(yellow)的原因

取自“https://wiki.sanxian.tech/index.php?title=Elasticsearch的一些api随记&oldid=978”