Re: [zfs-discuss] Instructions for ignoring ZFS write cache flushing on intelligent arrays

2006-12-16 Thread Gregory Shaw
That sounds like a really good idea. If you trust your high-end arrays (EMC, Engenio, HDS, Sun, etc.), I would think that a pool- level don't-fsync-ZIL would be very beneficial. As stated in the article, doing this on a storage solution without battery backed cache is a very bad idea. How

Re: [zfs-discuss] Instructions for ignoring ZFS write cache flushing on intelligent arrays

2006-12-16 Thread Richard Elling
Jeremy Teo wrote: On 12/16/06, Richard Elling <[EMAIL PROTECTED]> wrote: Jason J. W. Williams wrote: > Hi Jeremy, > > It would be nice if you could tell ZFS to turn off fsync() for ZIL > writes on a per-zpool basis. That being said, I'm not sure there's a > consensus on that...and I'm sure not s

Re: [zfs-discuss] Instructions for ignoring ZFS write cache flushing on intelligent arrays

2006-12-16 Thread Torrey McMahon
Jeremy Teo wrote: Are there actually storage arrays with battery backed cache that *don't* allow themselves to be configured to ignore cache flush commands? The arrays/controllers that LSI makes are well known for being extremely configurable. I would presume that most arrays you find on the

Re: [zfs-discuss] Instructions for ignoring ZFS write cache flushing on intelligent arrays

2006-12-16 Thread Torrey McMahon
Richard Elling wrote: Jason J. W. Williams wrote: Hi Jeremy, It would be nice if you could tell ZFS to turn off fsync() for ZIL writes on a per-zpool basis. That being said, I'm not sure there's a consensus on that...and I'm sure not smart enough to be a ZFS contributor. :-) The behavior is a