Ah thanks Jonathan, this is yet again a great explanation to get me started.
Will do some digging. Thanks allot!
On Wed, Sep 8, 2010 at 12:30 PM, Jonathan Ellis wrote:
> it looks to me like you are describing "compaction causes a lot of
> i/o." see http://wiki.apache.org/cassandra/MemtableSSTab
it looks to me like you are describing "compaction causes a lot of
i/o." see http://wiki.apache.org/cassandra/MemtableSSTable#Compaction
things you can do about the extra i/o:
- increase memtable sizes (if you haven't done this yet you should,
by 10x or so)
- reduce compaction priority (see
htt
This link describe ganglia / cassandra graphing.
http://mysqldba.blogspot.com/2010/09/cassandra-and-ganglia.html
I ran into a problem illustrated here.
http://www.flickr.com/photos/dathan/4971255111/
This screen shot shows a huge spike of transport exceptions between the
hours of 12:15 - to 1:3
