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From:Stewart Smith Date:October 11 2007 2:53pm
Subject:Re: [patch 0/8] WL4081 NDB Compressed LCP and Backup
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On Thu, 2007-10-11 at 18:45 +1000, stewart@stripped 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@stripped
Mobile: +61 4 3 8844 332

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

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Thread
[patch 0/8] WL4081 NDB Compressed LCP and Backupstewart11 Oct
  • [patch 4/8] WL4081: read compressed backup filesstewart11 Oct
  • [patch 3/8] WL4081: Add compressed file support to AsyncFile (azio) and support compressed backups.stewart11 Oct
  • [patch 1/8] WL4081: Copy azio for NDBstewart11 Oct
  • [patch 6/8] WL4081: Add support to AsyncFile for reading zlib compressed files.stewart11 Oct
  • [patch 5/8] WL4081: add support for *storing* compressed LCPstewart11 Oct
  • [patch 8/8] WL4081 Futz with mtr ndb config to enable compressed lcp, backup and O_DIRECTstewart11 Oct
  • [patch 7/8] WL4081 Allow use of direct IO (O_DIRECT) with aziostewart11 Oct
  • [patch 2/8] WL4081: Make azio build for NDBstewart11 Oct
  • Re: [patch 0/8] WL4081 NDB Compressed LCP and BackupStewart Smith11 Oct