Question-: If you wanted to take the backup of entire cluster SSTable then you would have to use parallel ssh to take the snapshot? A. True B. False
Answer: A
Explanation: when you have to take the backup of the entire cluster SSTable, then you need to run the snapshot command on each node in the cluster. And to initiate the same command on each node in the cluster we can take the benefit from the parallel ssh utility, which can invoke the same command on multiple nodes in parallel.
Question-: Please map the following
A. nodetool cleanup B. nodetool snapshot C. nodetool cleansnapshot
nodetool cleanup : Invalid replicas would be removed nodetool snapshot : Taking the snapshot of SSTable nodetool cleansnapshot : Delete all the snapshot on the node
Question-: Incremental backups flush the memtable to SSTable in the backup directory of the keyspace data directory. A. True B. False
Answer: A
Explanation: when incremental backups are enabled in every time memtable flush happens a hard link would be created to a backup Directory in the keyspace data directory. This backup should be store offsite without transferring snapshot. However, to create complete combined snapshot you need to combine snapshot of the memtable as well as of the snapshot SS cable. Keep in mind incremental backups are not automatically cleaned you have to setup a process to clean the incremental backup snapshots.