[Dovecot] Question about directory hashing
Hello
I have been reading http://wiki.dovecot.org/MailLocation and http://wiki.dovecot.org/Variables and I do not fully understand the directory hashing feature. I want to migrate > 70.000 users from Sun Messaging to Dovecot using imapsync. I have tested with mail_location=maildir:/buzones/us.es/%1Hu/%2.1u/%n but I get the following directory tree:
-- 0 |-- - |-- 1 |-- 2 |-- 3 |-- 8 |-- _ |-- a |-- ab |-- b |-- c |-- d |-- e |-- ev |-- f |-- g |-- h |-- i |-- ie |-- is |-- j |-- jb |-- jj |-- jp |-- js |-- k |-- l |-- m |-- mb |-- n |-- o |-- p |-- pp |-- q |-- r |-- rm |-- s |-- t |-- u |-- v |-- w |-- x |-- y -- z
The ideal directory layout should be the following:
First directory level: Letters from a to z
Second directory level: Numbers from 0 to 200
Third directory level: %n (username without @domain)
How can I achive this directory layout (or other optimized for 70.000 users) . I use ext3 on Red Hat Enterprise Linux 5 with directory indexes on.
Regards
Javier de MiguelOn pe, 2010-06-11 at 08:16 +0200, Javier de Miguel Rodríguez wrote:
mail_location=maildir:/buzones/us.es/%1Hu/%2.1u/%n but I get the following directory tree:
`-- 0 |-- - |-- 1 |-- 2 ..
Numbers with %H work in a special way (actually I had completely forgotten about this):
%H - take a 32bit hash of the variable and return it as hex. You can also limit the hash value. For example %256Hu gives values 0..ff. You might want padding also, so %2.256Hu gives 00..ff. This can be useful for example in dividing users automatically to multiple partitions.
The ideal directory layout should be the following: First directory level: Letters from a to z Second directory level: Numbers from 0 to 200 Third directory level: %n (username without @domain)
That's not possible, but you could have the same number of directories with: %2.26Hn/%2.200Hn/%n
participants (2)
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Javier de Miguel Rodríguez
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Timo Sirainen