es-解除硬盘超过80%限制

es节点所在的磁盘空间不够用的时候，es会将改节点上面的索引标位只读，不能向改索引写入数据，默认当磁盘空间超过85%，我们可以使用下面的命令调整磁盘空间比例为95%

 [WARN ][o.e.c.r.a.DiskThresholdMonitor] [Nii770G] flood stage disk watermark [95%] exceeded on [Nii770GyRDC4Xu99SOLKJw][Nii770G][C:\elasticsearch-6.2.4\data\nodes\0] free: 2.5gb[3.1%], all indices on this node will marked read-only

PUT /_cluster/settings
{
  "transient": {
    "cluster.routing.allocation.disk.watermark.low": "90%",
    "cluster.routing.allocation.disk.watermark.high": "95%",
    "cluster.info.update.interval": "1m"
  }
}

persistent表示为永久修改，重启以后也会保存设置
transient表示临时修改，重启以后不会保存设置
"cluster.info.update.interval": "1m" #时间间隔 现在是1分钟，默认是30s

配置文件永久修改

#解除硬盘限制超过80%无法创建索引
cluster.routing.allocation.disk.threshold_enabled: false