No reduction in disk space after delete

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No reduction in disk space after delete

Ravi Agrawal


I configured parameter as follows –

Gc_grace_seconds = 1hour.

Tombstone threshold = 1%


1.       I deleted 33% of the existing data but I don’t see any change in disk space the next day (24 hrs). Column family had 24,000 rows and the number of partition keys per row is about 1million. Is there something in Cassandra log which could help me understand what’s going on?

2.       Also out of curiosity why do I see multiple entries for the same rowKey when I query “select * from table_name”?


Thanks in advance.