On 10/11/2011 09:49 PM, Terry Cumaranatunge wrote:
Hello,
If you set a ttl and expire a column, I've read that this eventually
turns into a tombstone and will be cleaned out by the GC. Are
expirations considered a form of delete that still requires a node
repair to be run in gc_grace_period seconds? The operations guide says
you have to run node repair if you have deletes, so I'm trying to find
out if we can upsert the column with expirations using a ttl=1 to
substitute deletes. The node repair operations is very intensive in
our environment and causes a significant performance degradation on
the system.
Thanks
No - if you only use TTL to expire data, and no actual deletes or
updates on the ttl, then you generally do not need to do a nodetool repair.
I run two clusters that have rolling data sets relying on TTL that have
been running for months without any issues and have never run nodetool
repair.
-Eric
