Re: [patch 0/8] WL4081 NDB Compressed LCP and Backup

On Thu, 2007-10-11 at 18:45 +1000, stewart@mysql.com wrote:
> Performance
> -----------
> Slight performance degredation at the moment. Investigating.

Can be "solved" by changing the compression level in azio to Z_BEST_SPEED instead of the default. This gets us back to within a GCP time of uncompressed backup with only minimal extra space used to store backup (a couple of percent).

I'd love to try Brian's aio patch for azio though.... that could help speed things up. If it does, we can have yet more threads using CPU time :)

I'd love to test on a system somewhere with decent IO (several hundred MB/sec).... anyone got one?

-- 
Stewart Smith, Senior Software Engineer
MySQL AB, www.mysql.com
Office: +14082136540 Ext: 6616
VoIP: 6616@sip.us.mysql.com
Mobile: +61 4 3 8844 332

Jumpstart your cluster:
http://www.mysql.com/consulting/packaged/cluster.html


application/pgp-signature attachment: This is a digitally signed message part