HBase 动态配置
从HBase 1.0.0 版本开始，你可以在不重新启动服务器的情况下更改配置的子集。在 HBase shell 中，有新的操作符，update_config 以及 update_all_config，它们会提示服务器或所有服务器重新加载配置。
当前正在运行的服务器中，只能更改所有配置的子集。以下是这些支持动态更改的配置：
| Key |
|---|
| hbase.ipc.server.fallback-to-simple-auth-allowed |
| hbase.cleaner.scan.dir.concurrent.size |
| hbase.regionserver.thread.compaction.large |
| hbase.regionserver.thread.compaction.small |
| hbase.regionserver.thread.split |
| hbase.regionserver.throughput.controller |
| hbase.regionserver.thread.hfilecleaner.throttle |
| hbase.regionserver.hfilecleaner.large.queue.size |
| hbase.regionserver.hfilecleaner.small.queue.size |
| hbase.regionserver.hfilecleaner.large.thread.count |
| hbase.regionserver.hfilecleaner.small.thread.count |
| hbase.regionserver.flush.throughput.controller |
| hbase.hstore.compaction.max.size |
| hbase.hstore.compaction.max.size.offpeak |
| hbase.hstore.compaction.min.size |
| hbase.hstore.compaction.min |
| hbase.hstore.compaction.max |
| hbase.hstore.compaction.ratio |
| hbase.hstore.compaction.ratio.offpeak |
| hbase.regionserver.thread.compaction.throttle |
| hbase.hregion.majorcompaction |
| hbase.hregion.majorcompaction.jitter |
| hbase.hstore.min.locality.to.skip.major.compact |
| hbase.hstore.compaction.date.tiered.max.storefile.age.millis |
| hbase.hstore.compaction.date.tiered.incoming.window.min |
| hbase.hstore.compaction.date.tiered.window.policy.class |
| hbase.hstore.compaction.date.tiered.single.output.for.minor.compaction |
| hbase.hstore.compaction.date.tiered.window.factory.class |
| hbase.offpeak.start.hour |
| hbase.offpeak.end.hour |
| hbase.oldwals.cleaner.thread.size |
| hbase.procedure.worker.keep.alive.time.msec |
| hbase.procedure.worker.add.stuck.percentage |
| hbase.procedure.worker.monitor.interval.msec |
| hbase.procedure.worker.stuck.threshold.msec |
| hbase.regions.slop |
| hbase.regions.overallSlop |
| hbase.balancer.tablesOnMaster |
| hbase.balancer.tablesOnMaster.systemTablesOnly |
| hbase.util.ip.to.rack.determiner |
| hbase.ipc.server.max.callqueue.length |
| hbase.ipc.server.priority.max.callqueue.length |
| hbase.ipc.server.callqueue.type |
| hbase.ipc.server.callqueue.codel.target.delay |
| hbase.ipc.server.callqueue.codel.interval |
| hbase.ipc.server.callqueue.codel.lifo.threshold |
| hbase.master.balancer.stochastic.maxSteps |
| hbase.master.balancer.stochastic.stepsPerRegion |
| hbase.master.balancer.stochastic.maxRunningTime |
| hbase.master.balancer.stochastic.runMaxSteps |
| hbase.master.balancer.stochastic.numRegionLoadsToRemember |
| hbase.master.loadbalance.bytable |
| hbase.master.balancer.stochastic.minCostNeedBalance |
| hbase.master.balancer.stochastic.localityCost |
| hbase.master.balancer.stochastic.rackLocalityCost |
| hbase.master.balancer.stochastic.readRequestCost |
| hbase.master.balancer.stochastic.writeRequestCost |
| hbase.master.balancer.stochastic.memstoreSizeCost |
| hbase.master.balancer.stochastic.storefileSizeCost |
| hbase.master.balancer.stochastic.regionReplicaHostCostKey |
| hbase.master.balancer.stochastic.regionReplicaRackCostKey |
| hbase.master.balancer.stochastic.regionCountCost |
| hbase.master.balancer.stochastic.primaryRegionCountCost |
| hbase.master.balancer.stochastic.moveCost |
| hbase.master.balancer.stochastic.maxMovePercent |
| hbase.master.balancer.stochastic.tableSkewCost |