Cassandra自带一个nodetool工具，安装目录/bin/nodetool
nodetool help：帮助信息
[cassandra@node3 bin]$ ./nodetool help
usage: nodetool [(-p <port> | --port <port>)] [(-h <host> | --host <host>)]
[(-pwf <passwordFilePath> | --password-file <passwordFilePath>)]
[(-pw <password> | --password <password>)]
[(-u <username> | --username <username>)] <command> [<args>]
The most commonly used nodetool commands are:
assassinate Forcefully remove a dead node without re-replicating any data. Use as a last resort if you cannot removenode
bootstrap Monitor/manage node's bootstrap process
cleanup Triggers the immediate cleanup of keys no longer belonging to a node. By default, clean all keyspaces
clearsnapshot Remove the snapshot with the given name from the given keyspaces. If no snapshotName is specified we will remove all snapshots
compact Force a (major) compaction on one or more tables or user-defined compaction on given SSTables
compactionhistory Print history of compaction
compactionstats Print statistics on compactions
decommission Decommission the *node I am connecting to*
describecluster 打印集群信息
describering Shows the token ranges info of a given keyspace
disableautocompaction Disable autocompaction for the given keyspace and table
disablebackup Disable incremental backup
disablebinary Disable native transport (binary protocol)
disablegossip Disable gossip (effectively marking the node down)
disablehandoff Disable storing hinted handoffs
disablehintsfordc Disable hints for a data center
disablethrift Disable thrift server
drain Drain the node (stop accepting writes and flush all tables)
enableautocompaction Enable autocompaction for the given keyspace and table
enablebackup Enable incremental backup
enablebinary Reenable native transport (binary protocol)
enablegossip Reenable gossip
enablehandoff Reenable future hints storing on the current node
enablehintsfordc Enable hints for a data center that was previsouly disabled
enablethrift Reenable thrift server
failuredetector Shows the failure detector information for the cluster
flush Flush one or more tables
garbagecollect Remove deleted data from one or more tables
gcstats Print GC Statistics
getcompactionthreshold Print min and max compaction thresholds for a given table
getcompactionthroughput Print the MB/s throughput cap for compaction in the system
getconcurrentcompactors Get the number of concurrent compactors in the system.
getendpoints Print the end points that owns the key
getinterdcstreamthroughput Print the Mb/s throughput cap for inter-datacenter streaming in the system
getlogginglevels 打印日志级别
getsstables Print the sstable filenames that own the key
getstreamthroughput Print the Mb/s throughput cap for streaming in the system
gettimeout Print the timeout of the given type in ms
gettraceprobability Print the current trace probability value
gossipinfo 打印这个节点通过gossip向其他节点传递的参数
help 打印帮助信息
info 打印节点信息
invalidatecountercache Invalidate the counter cache
invalidatekeycache Invalidate the key cache
invalidaterowcache Invalidate the row cache
join Join the ring
listsnapshots Lists all the snapshots along with the size on disk and true size.
move Move node on the token ring to a new token
netstats Print network information on provided host (connecting node by default)
pausehandoff Pause hints delivery process
proxyhistograms Print statistic histograms for network operations
rangekeysample Shows the sampled keys held across all keyspaces
rebuild Rebuild data by streaming from other nodes (similarly to bootstrap)
rebuild_index A full rebuild of native secondary indexes for a given table
refresh Load newly placed SSTables to the system without restart
refreshsizeestimates Refresh system.size_estimates
reloadlocalschema Reload local node schema from system tables
reloadtriggers Reload trigger classes
relocatesstables Relocates sstables to the correct disk
removenode Show status of current node removal, force completion of pending removal or remove provided ID
repair Repair one or more tables
replaybatchlog Kick off batchlog replay and wait for finish
resetlocalschema Reset node's local schema and resync
resumehandoff Resume hints delivery process
ring 查看token环信息
scrub Scrub (rebuild sstables for) one or more tables
setcachecapacity Set global key, row, and counter cache capacities (in MB units)
setcachekeystosave Set number of keys saved by each cache for faster post-restart warmup. 0 to disable
setcompactionthreshold Set min and max compaction thresholds for a given table
setcompactionthroughput Set the MB/s throughput cap for compaction in the system, or 0 to disable throttling
setconcurrentcompactors Set number of concurrent compactors in the system.
sethintedhandoffthrottlekb Set hinted handoff throttle in kb per second, per delivery thread.
setinterdcstreamthroughput Set the Mb/s throughput cap for inter-datacenter streaming in the system, or 0 to disable throttling
setlogginglevel 动态设置日志级别
setstreamthroughput Set the Mb/s throughput cap for streaming in the system, or 0 to disable throttling
settimeout Set the specified timeout in ms, or 0 to disable timeout
settraceprobability Sets the probability for tracing any given request to value. 0 disables, 1 enables for all requests, 0 is the default
snapshot Take a snapshot of specified keyspaces or a snapshot of the specified table
status 打印集群信息
statusbackup Status of incremental backup
statusbinary Status of native transport (binary protocol)
statusgossip 打印gossip状态
statushandoff 打印当前节点storing future hints状态
statusthrift 打印thrift服务状态
stop Stop compaction
stopdaemon Stop cassandra daemon
tablehistograms Print statistic histograms for a given table
tablestats 打印表统计信息
toppartitions Sample and print the most active partitions for a given column family
tpstats 打印线程池统计信息
truncatehints Truncate all hints on the local node, or truncate hints for the endpoint(s) specified.
upgradesstables Rewrite sstables (for the requested tables) that are not on the current version (thus upgrading them to said current version)
verify Verify (check data checksum for) one or more tables
version 打印cassandra版本
viewbuildstatus Show progress of a materialized view build
See 'nodetool help <command>' for more information on a specific command.
来源：https://www.cnblogs.com/yuxiaohao/p/12269484.html