Rob Banz rob at
Sat Dec 1 12:27:17 EST 2007

I enabled it a few weeks ago before I left UMBC, and it certainly  
seemed to help write performance on the ZFS pool -- we started seeing  
the larger batched writes on those devices, instead of a constant  
stream of itty bity IOs caused by the constant fsync'ing.

If you feel that your filesystem/buffercache will do a good job at  
writing things out to disk, and you've got battery-backed cache on  
your storage, you should be relatively well off.


On Nov 30, 2007, at 19:59, Vincent Fox wrote:

> How "unsafe" is setting in imapd.conf
> skiplist_unsafe: 1
> Our /var/cyrus/imap filesystem is on a ZFS mirror set on
> arrays with dual controllers so OS and/or hardware
> corruption is remote.
> The application can scramble it but that can happen
> whether we have sync or not eh?
> Anything I am missing?
> ----
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