Re: [Dovecot] performance of maildir on ocfs2

2010-05-26 Thread Timo Sirainen
On Sat, 2010-05-01 at 04:44 +0300, luben karavelov wrote: > 1st. There is some problem with imap + quota plugin. the corresponding logs: > > May 1 03:46:33 rho2 dovecot: imap(lu...@test.dpv.bg): Panic: file > index-transaction.c: line 145 (index_transaction_rollback): assertion > failed: (box->

Re: [Dovecot] performance of maildir on ocfs2

2010-04-30 Thread luben karavelov
On 1.05.2010 00:32, Timo Sirainen wrote: v1.2 dbox is similar to v2.0's dbox, but not identical. v2.0 dbox is simpler and faster. Also dbox and mdbox are different, although they share some code. http://wiki.dovecot.org/MailboxFormat/dbox Anyway, v2.0 is supposed to be able to read v1.2's db

Re: [Dovecot] performance of maildir on ocfs2

2010-04-30 Thread Timo Sirainen
On 1.5.2010, at 0.25, luben karavelov wrote: > My tests and benchmarks were done using v1.2.11. May be I should make some > benchmarks for mdbox also using dovecot v2. My understanding is that dbox > is forward compatible with mdbox and there will be no need to convert > mailboxes from dbox to mdb

Re: [Dovecot] performance of maildir on ocfs2

2010-04-30 Thread luben karavelov
On 29.04.2010 21:02, Timo Sirainen wrote: On Mon, 2010-04-26 at 15:51 +0300, karavelov wrote: 3. My understanding is that OCFS2 uses a global lock for move/rename. As you know, Maildir format uses a lot of such operations. I think that dbox format (dovecot native) will be better choice, bec

Re: [Dovecot] performance of maildir on ocfs2

2010-04-29 Thread Timo Sirainen
On Mon, 2010-04-26 at 15:51 +0300, karavelov wrote: > 3. My understanding is that OCFS2 uses a global lock for move/rename. > As you know, Maildir format uses a lot of such operations. I think > that > dbox format (dovecot native) will be better choice, because there are > no file moves/renames. I

Re: [Dovecot] performance of maildir on ocfs2

2010-04-26 Thread luben karavelov
On 26.04.2010 21:42, Philipp Snizek wrote: So bottom line is to use a filesystem such as XFS, distribute and dedicate mailboxes to a number of backend imap servers optimally with direct access to the storage and do imap proxying and loadbalancing in front of those servers. Then you should

Re: [Dovecot] performance of maildir on ocfs2

2010-04-26 Thread Philipp Snizek
On 26.04.2010 14:51, karavelov wrote: On 26.04.2010 14:37, mailingli...@belfin.ch wrote: Hi, I would like to run my imap service on a active-active cluster. I wonder how well OCFS2 performs in read and write with millions of smallest files involved. Has anybody got any experience? Thanks John

Re: [Dovecot] performance of maildir on ocfs2

2010-04-26 Thread karavelov
On 26.04.2010 14:37, mailingli...@belfin.ch wrote: Hi, I would like to run my imap service on a active-active cluster. I wonder how well OCFS2 performs in read and write with millions of smallest files involved. Has anybody got any experience? Thanks John I have some experience. I have d