Paulo Motta created CASSANDRA-17588:
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Summary: "Total TrueDiskSpaceUsed" computation does not include
manifest and schema files
Key: CASSANDRA-17588
URL: https://issues.apache.org/jira/browse/CASSANDRA-17588
Project: Cassandra
Issue Type: Bug
Components: Local/Snapshots
Reporter: Paulo Motta
This is the output of {{nodetool listsnapshots}}:
{noformat}
Snapshot Details:
Snapshot name Keyspace name Column family name True size Size
on disk Creation time Expiration time
test ks indexed_table 1.1 KiB 21.22
KiB 2022-04-26T19:13:20.102Z
test ks my_table 960 bytes 10.76
KiB 2022-04-26T19:13:20.102Z
dropped-1650997415751-my_table ks my_table 989 bytes 989
bytes 2022-04-26T18:23:35.751Z
Total TrueDiskSpaceUsed: 0 KiB
{noformat}
Total TrueDiskSpaceUsed does not match the sum of "true size on disk" of all
snapshots.
The reason for this is because {{Total TrueDiskSpaceUsed}} computation does not
include the size of snapshot schema and manifest files.
We should fix the {{Total TrueDiskSpaceUsed}} computation to include the the
size of snapshot schema and manifest files, so it will look like this:
{noformat}
Snapshot Details:
Snapshot name Keyspace name Column family name True size Size
on disk Creation time Expiration time
test ks indexed_table 1.1 KiB 21.22
KiB 2022-04-26T19:13:20.102Z
test ks my_table 960 bytes 10.76
KiB 2022-04-26T19:13:20.102Z
dropped-1650997415751-my_table ks my_table 989 bytes 989
bytes 2022-04-26T18:23:35.751Z
Total TrueDiskSpaceUsed: 3 KiB
{noformat}
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