[Dovecot] size of "m.XXX" in mdbox

[Timo Sirainen]

What does "doveconf | grep mdbox" say? This isn't normal..

On 6.1.2011, at 0.33, Joan Moreau wrote:

> 
> 
> so, why after a dsync from sdbox to mdbox, I have 100 000's of files of
> about 20k ? (and not 2MB !)
> 
> -rw-r--r-- 1 mailusers mail  21K 2011-01-03 02:47 m.1
> -rw-r--r-- 1 mailusers mail  17K 2011-01-03 02:47 m.10
> -rw-r--r-- 1 mailusers mail  20K 2011-01-03 02:47 m.100
> -rw-r--r-- 1 mailusers mail  20K 2011-01-03 02:51 m.1000
> -rw-r--r-- 1 mailusers mail  14K 2011-01-03 03:35 m.10000
> -rw-r--r-- 1 mailusers mail  19K 2011-01-03 09:04 m.100000
> -rw-r--r-- 1 mailusers mail 174K 2011-01-03 09:04 m.100001
> -rw-r--r-- 1 mailusers mail 175K 2011-01-03 09:04 m.100002
> -rw-r--r-- 1 mailusers mail  19K 2011-01-03 09:04 m.100003
> -rw-r--r-- 1 mailusers mail  19K 2011-01-03 09:04 m.100004
> -rw-r--r-- 1 mailusers mail  19K 2011-01-03 09:04 m.100005
> -rw-r--r-- 1 mailusers mail  17K 2011-01-03 09:04 m.100006
> -rw-r--r-- 1 mailusers mail  19K 2011-01-03 09:04 m.100007
> -rw-r--r-- 1 mailusers mail  18K 2011-01-03 09:04 m.100008
> -rw-r--r-- 1 mailusers mail  19K 2011-01-03 09:04 m.100009
> -rw-r--r-- 1 mailusers mail  14K 2011-01-03 03:35 m.10001
> -rw-r--r-- 1 mailusers mail  20K 2011-01-03 09:04 m.100010
> -rw-r--r-- 1 mailusers mail  19K 2011-01-03 09:04 m.100011
> -rw-r--r-- 1 mailusers mail  18K 2011-01-03 09:05 m.100012
> -rw-r--r-- 1 mailusers mail  17K 2011-01-03 09:05 m.100013
> -rw-r--r-- 1 mailusers mail  20K 2011-01-03 09:05 m.100014
> -rw-r--r-- 1 mailusers mail 173K 2011-01-03 09:05 m.100015
> -rw-r--r-- 1 mailusers mail  18K 2011-01-03 09:05 m.100016
> -rw-r--r-- 1 mailusers mail  19K 2011-01-03 09:05 m.100017
> -rw-r--r-- 1 mailusers mail  18K 2011-01-03 09:05 m.100018
> -rw-r--r-- 1 mailusers mail  18K 2011-01-03 09:05 m.100019
> -rw-r--r-- 1 mailusers mail  14K 2011-01-03 03:35 m.10002
> -rw-r--r-- 1 mailusers mail 177K 2011-01-03 09:05 m.100020
> -rw-r--r-- 1 mailusers mail  20K 2011-01-03 09:05 m.100021
> -rw-r--r-- 1 mailusers mail  18K 2011-01-03 09:05 m.100022
> -rw-r--r-- 1 mailusers mail  52K 2011-01-03 09:05 m.100023
> -rw-r--r-- 1 mailusers mail  18K 2011-01-03 09:05 m.100024
> -rw-r--r-- 1 mailusers mail 177K 2011-01-03 09:05 m.100025
> -rw-r--r-- 1 mailusers mail  19K 2011-01-03 09:05 m.100026
> 
> 
> On Thu, 6 Jan 2011 00:15:30 +0200, Timo Sirainen wrote:
> 
>> On 6.1.2011, at 0.07, Joan Moreau wrote:
>> 
>>> How to tune the size of each "m.xxx" file in mdbox format , in order to
>>> optimize the ratio size/number of files ? (I can see for instance more
>>> than 100 000 files in one directory due to very large mailbox size)
>> mdbox_rotate_size setting sets the max size of one mdbox file. There's
>> really no ratio setting.. It would be difficult since as more messages
>> get added more files would have to be merged, which would generate extra
>> disk I/O, and typically people care about disk I/O rather than the inode
>> count.
>> 
>>> If such parameter exists, what is the typical value ?
>> Default is 2 MB files.
>