Re: [zfs-discuss] ZFS ... open source moving forward?

2010-12-24 Thread Martin Matuska
Tim Cook cook.ms> writes: > You are not a court of law, and that statement has not been tested.  It is your opinion and nothing more.  I'd appreciate if every time you repeated that statement, you'd preface it with "in my opinion" so you don't have people running around believing what they're doi

Re: [zfs-discuss] Looking for 3.5" SSD for ZIL

2010-12-24 Thread Richard Elling
On Dec 22, 2010, at 8:57 PM, Bill Werner wrote: >>> got it attached to a UPS with very conservative >> shut-down timing. Or >>> are there other host failures aside from power a >> ZIL would be >>> vulnerable too (system hard-locks?)? >> >> Correct, a system hard-lock is another example... > > H

Re: [zfs-discuss] SAS/short stroking vs. SSDs for ZIL

2010-12-24 Thread Phil Harman
On 24/12/2010 18:21, Richard Elling wrote: Latency is what matters most. While there is a loose relationship between IOPS and latency, you really want low latency. For 15krpm drives, the average latency is 2ms for zero seeks. A decent SSD will beat that by an order of magnitude. And the cl

Re: [zfs-discuss] SAS/short stroking vs. SSDs for ZIL

2010-12-24 Thread Richard Elling
On Dec 23, 2010, at 2:25 AM, Stephan Budach wrote: > as I have learned from the discussion about which SSD to use as ZIL drives, I > stumbled across this article, that discusses short stroking for increasing > IOPs on SAS and SATA drives: > > http://www.tomshardware.com/reviews/short-stroking-hd

Re: [zfs-discuss] SAS/short stroking vs. SSDs for ZIL

2010-12-24 Thread Edward Ned Harvey
> From: Frank Lahm [mailto:frankl...@googlemail.com] > > With Netatalk for AFP he _is_ running a database: any AFP server needs > to maintain a consistent mapping between _not reused_ catalog node ids > (CNIDs) and filesystem objects. Luckily for Apple, HFS[+] and their > Cocoa/Carbon APIs provide

Re: [zfs-discuss] stupid ZFS question - floating point operations

2010-12-24 Thread Garrett D'Amore
Thanks for the clarification. I guess I need to go back and figure out how ZFS crypto keying is performed. I guess most likely the key is generated from some sort of one-way hash from a passphrase? - Garrett -Original Message- From: Darren J Moffat [mailto:darren.mof...@oracle.com]