Cassandra servers prior to version 2.1 used Log4j for logging purposes; however, from version 2.1 onwards, they use the Logback library. Cassandra logs its various activities in the
system.log file. Logging configuration can be adjusted as per our requirements using the
logback.xml file based on the Cassandra server version you're using. The
nodetool cfstats command provides statistics of a column family, such as memtable uses, SSTable count, and Bloom filter usage. Read/write latencies for a column family can be tracked using the
nodetool cfhistogram utility. The
cfhistograms command gives distribution data about latencies, partition sizes, and SSTable count. Bloom filter accuracy can be adjusted to suit our ...