8 Nov
2011
8 Nov
'11
4:29 p.m.
Other important thing to consider is message expunging. With mdbox you are "delaying" the I/O associated with deleting e-mails. We have a nightly cronjob that expunge messages from mdboxes.
If you have en EVA (wich one? 4.400? 6.400? ) you also can consider RAID 1+0 or SSD for indexes. Indexes are hammered in mdbox.
Regards
JavierAm Dienstag, 8. November 2011, 15:15:39 schrieb Javier de Miguel Rodríguez:
Hi,
If you have CPU to spare, consider using zlib with mdbox. You aretrading CPU power (cheap) to get fewer IOPS (IOPS count is expensive).
Hey. This point is great. I hadn't realized that.
Sure. zlib will save IOPS and 2x6-CPUs aren't a problem. Good point -thanks.
compressed) and backup software is happier because there are few (100.000+ files with mdbox) to backup instead of several millions (Maildir) Yes, that#s the main reason why I want to switch to mbox. At the moment our roundtrip-time for the backup is> 24h...
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