ZFS doing insane I/O reads

2012-02-27 Thread Ram
I just deployed zfs on my newer cyrus servers. These servers get less than 2000 mails per hour and around 400 concurrent pop/imap connections I have seen that even if there is no incoming pop or imap connection still there is large amount of READ happenning on the zfs partitions. Is this

Re: ZFS doing insane I/O reads

2012-02-27 Thread Eric Luyten
On Mon, February 27, 2012 11:10 am, Ram wrote: I just deployed zfs on my newer cyrus servers. These servers get less than 2000 mails per hour and around 400 concurrent pop/imap connections I have seen that even if there is no incoming pop or imap connection still there is large amount of

Re: how to authenticate on localhost without password?

2012-02-27 Thread Dan White
On 02/26/12 12:36 -0500, Brian J. Murrell wrote: Subject might be a bit misleading but here is the problem... I have a cyrus imap server serving a userbase. Of course with any mail system comes the issue of handling spam. My users each have two folders in their account: Junk and Not Junk

Re: how to authenticate on localhost without password?

2012-02-27 Thread Dan White
On 02/27/12 10:32 -0600, Dan White wrote: Another option would be to utilize SASL EXTERNAL authentication to authenticate your users, locally, based on peercred. Cyrus IMAP does not currently have support for external auth, but I'm attaching a Linux specific patch, against cyrus 2.3.12, which

Re: ZFS doing insane I/O reads

2012-02-27 Thread Ram
On 02/27/2012 04:16 PM, Eric Luyten wrote: On Mon, February 27, 2012 11:10 am, Ram wrote: I just deployed zfs on my newer cyrus servers. These servers get less than 2000 mails per hour and around 400 concurrent pop/imap connections I have seen that even if there is no incoming pop or imap

Re: ZFS doing insane I/O reads

2012-02-27 Thread Pascal Gienger
Le 28/02/2012 07:13, Ram a écrit : This is a 16GB Ram server running Linux Centos 5.5 64 bit. There seems to be something definitely wrong .. because all the memory on the machine is free. (I dont seem to have fsstat on my server .. I will have to get it compiled ) ZFS as FUSE? We have