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From Kai Wang <dep...@gmail.com>
Subject lots of tombstone after compaction
Date Mon, 07 Dec 2015 23:46:57 GMT
I bulkloaded a few tables using CQLSStableWrite/sstableloader. The data are
large amount of wide rows with lots of null's. It takes one day or two for
the compaction to complete. sstable count is at single digit. Maximum
partition size is ~50M and mean size is ~5M. However I am seeing frequent
read query timeouts caused by tombstone_failure_threshold (100000). These
tables are basically read-only. There're no writes.

I just kicked off compaction on those tables using nodetool. Hopefully it
can remove those tombstones. But is it normal to have these many tombstones
after the initial compactions? Is this related to the fact the original
data has lots of nulls?

Thanks.

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