cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Oleg Proudnikov <ol...@cloudorange.com>
Subject Re: Question regarding major compaction.
Date Tue, 01 May 2012 20:00:28 GMT
Henrik Schröder <skrolle <at> gmail.com> writes:

> But what's the difference between doing an extra read from that 
> One Big File, than doing an extra read from whatever SSTable 
> happen to be largest in the course of automatic minor compaction?

There is this note regarding major compaction in the tuning guide:

"once you run a major compaction, automatic minor compactions are no longer
triggered frequently forcing you to manually run major compactions on a routine
basis"

I think, this means that unless you run major compactions regularly, the number
of sstables will naturally grow leading to incremental degradation in read
performance for update workloads.

Oleg





Mime
View raw message