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From Rene Kochen <rene.koc...@schange.com>
Subject minor compaction and delete expired column-tombstones
Date Fri, 14 Sep 2012 18:32:55 GMT
Hi all,

Does minor compaction delete expired column-tombstones when the row is
also present in another table which is not subject to the minor
compaction?

Example:

Say there are 5 SStables:

- Customers_0 (10 MB)
- Customers_1 (10 MB)
- Customers_2 (10 MB)
- Customers_3 (10 MB)
- Customers_4 (30 MB)

A minor compaction is triggered which will compact the similar sized
tables 0 to 3. In these tables is a customer record with key "C1" with
an expired column tombstone. Customer "C1" is also present in table 4.
Will the minor compaction delete the column (i.e. will the tombstone
be present in the newly created table)?

Thanks,

Rene

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