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PUT _cluster/settings { "persistent" : { "cluster.routing.rebalance.enable":
"none",##允许在一个节点上发生多少并发传入分片恢复。 默认为2。 ##多数为副本
"cluster.routing.allocation.node_concurrent_incoming_recoveries":2,
##允许在一个节点上发生多少并发传出分片恢复,默认为2. ## 多数为主分片
"cluster.routing.allocation.node_concurrent_outgoing_recoveries":2,
##为上面两个的统一简写 "cluster.routing.allocation.node_concurrent_recoveries":2,
##在通过网络恢复副本时,节点重新启动后未分配的主节点的恢复使用来自本地 磁盘的数据。 ##这些应该很快,因此更多初始主要恢复可以在同一节点上并行发生。
默认为4。 "cluster.routing.allocation.node_initial_primaries_recoveries":4,
##允许执行检查以防止基于主机名和主机地址在单个主机上分配同一分片的多个实例。 ##默认为false,表示默认情况下不执行检查。
此设置仅适用于在同一台计算机上启动多个节点的情况。这个我的理解是如果设置为false,
##则同一个节点上多个实例可以存储同一个shard的多个副本没有容灾作用了
"cluster.routing.allocation.same_shard.host":true } }