Re: [zfs-discuss] UFS on zvol Cache Questions...

2008-02-11 Thread Roch - PAE
Priming the cache for ZFS should work at least after boot When freemem is large; any read block will make it to cache. Post boot when memory is primed with something else (what?) then it gets more difficult for both UFS and ZFS to guess what to keep in caches. Did you try priming ZFS after boot ?

Re: [zfs-discuss] UFS on zvol Cache Questions...

2008-02-08 Thread Brad Diggs
Hello Darren, Please find responses in line below... On Fri, 2008-02-08 at 10:52 +, Darren J Moffat wrote: > Brad Diggs wrote: > > I would like to use ZFS but with ZFS I cannot prime the cache > > and I don't have the ability to control what is in the cache > > (e.g. like with the directio U

Re: [zfs-discuss] UFS on zvol Cache Questions...

2008-02-08 Thread Darren J Moffat
Brad Diggs wrote: > I would like to use ZFS but with ZFS I cannot prime the cache > and I don't have the ability to control what is in the cache > (e.g. like with the directio UFS option). Why do you believe you need that at all ? What do you do to "prime" the cache with UFS and what benefit do