LARGE single-system Cyrus installs?

Ken Murchison murch at
Tue Nov 20 15:38:32 EST 2007

Pascal Gienger wrote:
> Rob Banz <rob at> wrote:
>> We went through a similar discussion last year in OpenAFS land, and
>> came the same conclusion -- basically, if your filesystem is
>> reasonably reliable (such as ZFS is), and you can trust your
>> underlying storage not to lose transactions that are in-cache during a
>> 'bad event', the added benefit of fsync() may be less than its
>> performance cost.
> Would'nt it be nice to have a configuration option to completely turn off 
> fsync() in Cyrus? If you want, with a BIG WARNING in the doc stating NOT TO 
> USE IT unless you know what you doing. :)

Its already in imapd.conf(8):


Kenneth Murchison
Systems Programmer
Project Cyrus Developer/Maintainer
Carnegie Mellon University

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