CASSANDRA Operations and Administration 2

Question 1

What is the 'sstableloader' tool used for in Cassandra?

Accepted Answer

Bulk-loading existing SSTable files into a running Cassandra cluster

Answer

sstableloader streams one or more SSTable files into a live cluster, automatically handling token distribution so data lands on the correct nodes.

Question 2

What Cassandra tool can be used to inspect the contents of an SSTable file without starting a Cassandra node?

Accepted Answer

sstabledump

Answer

sstabledump serializes the contents of an SSTable to JSON format so you can inspect partition data, tombstones, and metadata without running a live node.

Question 3

In a Cassandra cluster, what does 'bootstrap' refer to?

Accepted Answer

The process by which a new node joins the ring and streams its assigned data from existing nodes

Answer

During bootstrap, a new node contacts the seed nodes, receives its token assignments, and streams the corresponding data from current owners before becoming fully operational.

Question 4

What does the 'nodetool assassinate' command do?

Accepted Answer

Forcefully removes a node that is stuck in a leaving/joining state from the ring

Answer

nodetool assassinate is used as a last resort to forcefully remove a node that is stuck in the ring (e.g., in LEAVING state) when normal decommission has failed.

Question 5

What is the purpose of running 'nodetool upgradesstables' after a Cassandra version upgrade?

Accepted Answer

Rewrites all SSTables into the current version's format to take advantage of format improvements

Answer

upgradesstables rewrites SSTables into the latest SSTable format version, enabling new compression, indexing, and performance features introduced in the upgraded version.

CASSANDRA - Apache Cassandra Database Practice Test

CASSANDRA - Apache Cassandra Database Practice Test

CASSANDRA Operations and Administration 2