OperationsGuide/clickhouse-zookeeper/zookeeper-installation.md

[lesandie]

• https://docs.altinity.com/operationsguide/clickhouse-zookeeper/zookeeper-installation/#applications-to-install

  Install the following applications in your servers:
  zookeeper (3.4.9 or later)
  netcat

Change to zookeeper (3.7.1 or later)

• https://docs.altinity.com/operationsguide/clickhouse-zookeeper/zookeeper-installation/#reduce-snapshots

  # To avoid seeks ZooKeeper allocates space in the transaction log file in blocks of preAllocSize kilobytes.
  # The default block size is 64M. One reason for changing the size of the blocks is to reduce the block size
  # if snapshots are taken more often. (Also, see snapCount).
  preAllocSize=65536
  # ZooKeeper logs transactions to a transaction log. After snapCount transactions are written to a log file a
  # snapshot is started and a new transaction log file is started. The default snapCount is 10,000.
  snapCount=10000

Change this to:

# The default block size is 64M. One reason for changing the size of the blocks is to reduce the block size
# if snapshots are taken more often. (Also, see snapCount).
preAllocSize=65536
# ZooKeeper logs transactions to a transaction log. After snapCount transactions are written to a log file a
# snapshot is started and a new transaction log file is started. The default snapCount is 100000.
snapCount=10000

# Don't change the above unless you need to reduce the snapshot size. Default values should be ok for different use cases:
# preAllocSize=131072
# snapCount=3000000