[Dovecot] Expected size of index-files?
Benjamin R. Haskell
dovecot at benizi.com
Fri Feb 8 18:37:39 EET 2008
> Tobias Balle-Petersen schreef:
>> Hello...
>>
>> Im considering moving my index-files to a RAID1. How big do these
>> files get? What should I plan for?
>>
>> Thanks,
>> Tobias
>>
> since 1 july 2007 i store all mails to this list in 1 folder
> (Maildir-format)
>
> the size of this (and the indexes) is:
> 31M cur
> 80K dovecot.index
> 6.8M dovecot.index.cache
> 44K dovecot.index.log
> 136K dovecot.index.log.2
> 4.0K dovecot-keywords
> 164K dovecot-uidlist
> 4.0K new
> 4.0K tmp
>
> so, on average maybe 20%-30% of the size of your messages ?
>
>
On Fri, 8 Feb 2008, Jan van den Berg wrote:
> That's actually quite a lot.
> Consider you run 100k+ mailboxes (1GB each) and you would move to
> Dovecot this will be a huge chunk out of your storage.
> Is using dovecot index files really that much faster than running
> ":INDEX=MEMORY" ? Where could I find some benchmarks about this?
>
> Cheers,
>
> Jan
>
I think a lot would depend on your average message size. Here's another
data point. At my old company's server:
43,438 messages
2,350,260,769 bytes
per-message ~ 54K
~3,000 folders:
486 dovecot-keywords
2675 dovecot-uidlist
2967 dovecot.index
2456 dovecot.index.cache
2967 dovecot.index.log
183 dovecot.index.log.2
251 maildirfolder
26 subscriptions
total non-message file sizes:
93,010,227 bytes
/ 2,350,260,769 bytes
=~ 3.9 percent
And, taking into account what Timo wrote about it being client-dependent,
most of the users there are using Outlook.
Best,
Ben
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