Cassandra operations

Install

emisar pack install validates the pack and verifies its content hash before copying it into /etc/emisar/packs. The --hash below pins the install to the exact bytes on this page — a tampered copy is rejected. After install, reload the runner; it re-reads the catalog and advertises every action.

content hash: sha256:88748618f06a03c2cdd253a28bf792206a9a157e01877fe16503073ec789fa5a

sudo emisar pack install cassandra \
  --hash sha256:88748618f06a03c2cdd253a28bf792206a9a157e01877fe16503073ec789fa5a \
  --dest /etc/emisar/packs

# Reload so the runner re-reads the catalog:
sudo systemctl reload emisar

• cassandra.analyze_disk_pressure script low

  Analyze Cassandra disk pressure

• cassandra.cqlsh_describe_keyspace exec low

  cqlsh -e "DESCRIBE KEYSPACE <ks>"

• cassandra.cqlsh_describe_schema exec low

  cqlsh -e "DESCRIBE SCHEMA"

• cassandra.cqlsh_list_keyspaces exec low

  cqlsh -e "DESCRIBE KEYSPACES"

• cassandra.cqlsh_list_roles exec low

  cqlsh -e "LIST ROLES"

• cassandra.cqlsh_system_peers exec low

  SELECT * FROM system.peers_v2

• cassandra.cqlsh_system_size_estimates exec low

  SELECT * FROM system.size_estimates

• cassandra.nodetool_assassinate exec critical

  nodetool assassinate <address>

• cassandra.nodetool_cleanup exec high

  nodetool cleanup [ks]

• cassandra.nodetool_clearsnapshot exec high

  nodetool clearsnapshot -t <name>

• cassandra.nodetool_compact exec high

  nodetool compact <ks> [table]

• cassandra.nodetool_compactionhistory exec low

  nodetool compactionhistory

• cassandra.nodetool_compactionstats exec low

  Cassandra compaction statistics

• cassandra.nodetool_decommission exec critical

  nodetool decommission

• cassandra.nodetool_describecluster exec low

  nodetool describecluster

• cassandra.nodetool_describering exec low

  nodetool describering <keyspace>

• cassandra.nodetool_drain exec critical

  nodetool drain

• cassandra.nodetool_failuredetector exec low

  nodetool failuredetector

• cassandra.nodetool_flush exec high

  nodetool flush [ks] [table]

• cassandra.nodetool_getcompactionthroughput exec low

  nodetool getcompactionthroughput

• cassandra.nodetool_getconcurrentcompactors exec low

  nodetool getconcurrentcompactors

• cassandra.nodetool_getendpoints exec low

  nodetool getendpoints <ks> <table> <key>

• cassandra.nodetool_getlogginglevels exec low

  nodetool getlogginglevels

• cassandra.nodetool_gossipinfo exec low

  nodetool gossipinfo

• cassandra.nodetool_info exec low

  nodetool info

• cassandra.nodetool_invalidatecountercache exec medium

  nodetool invalidatecountercache

• cassandra.nodetool_invalidatekeycache exec medium

  nodetool invalidatekeycache

• cassandra.nodetool_invalidaterowcache exec medium

  nodetool invalidaterowcache

• cassandra.nodetool_listsnapshots exec low

  nodetool listsnapshots

• cassandra.nodetool_netstats exec low

  nodetool netstats

• cassandra.nodetool_proxyhistograms exec low

  nodetool proxyhistograms

• cassandra.nodetool_rebuild exec high

  nodetool rebuild [source_dc]

• cassandra.nodetool_removenode exec critical

  nodetool removenode <host-id>

• cassandra.nodetool_repair exec high

  Cassandra repair

• cassandra.nodetool_ring exec low

  nodetool ring [keyspace]

• cassandra.nodetool_setcompactionthroughput exec medium

  nodetool setcompactionthroughput <MB/s>

• cassandra.nodetool_setlogginglevel exec medium

  nodetool setlogginglevel <logger> <level>

• cassandra.nodetool_snapshot exec medium

  nodetool snapshot -t <name> [ks]

• cassandra.nodetool_status exec low

  Cassandra node ring status

• cassandra.nodetool_stop_compaction exec high

  nodetool stop <operation>

• cassandra.nodetool_tablehistograms exec low

  nodetool tablehistograms <ks> <table>

• cassandra.nodetool_tablestats exec low

  Cassandra table stats

• cassandra.nodetool_tpstats exec low

  Cassandra thread pool stats

• cassandra.nodetool_verify exec medium

  nodetool verify [ks] [table]

• cassandra.nodetool_version exec low

  nodetool version