Hi
Some Cassandra nodes could have rows that are associated with tokens
that aren't owned by those nodes anymore as a result of expansion, this
data will remain until a cleanup compaction is run.
We would like to know the best way to calculate the amount (or close to)
of data that is essentially dead data on each node to determine how much
disk space will be freed once the expansion is complete. One possible
approach we considered is to identify the rows no longer owned by each
node and their size by scanning the sstables.
- Determine disc space that will be freed after expansion c... Cameron Gandevia
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