You can back up a Cassandra cluster, both data and commit logs, on demand.
Procedure
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From the navigation pane, go to Protect > Big data.
The Big data page appears.
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In the row for the cluster, click the action button
, and then click Back up.The Select backup level dialog box appears.
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For Backup level, select the backup type.
To back up logs along with the data, select both the Log and Data check boxes.
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Click OK.