Re: [zfs-discuss] ZFS and databases

2006-05-11 Thread Tao Chen
On 5/11/06, Peter Rival [EMAIL PROTECTED] wrote: Richard Elling wrote: Oracle will zero-fill the tablespace with 128kByte iops -- it is not sparse. I've got a scar. Has this changed in the past few years? Multiple parallel tablespace creates is usually a big pain point for filesystem /

Re: [zfs-discuss] ZFS and databases

2006-05-12 Thread Tao Chen
On 5/12/06, Roch Bourbonnais - Performance Engineering [EMAIL PROTECTED] wrote: From: Gregory Shaw [EMAIL PROTECTED] Regarding directio and quickio, is there a way with ZFS to skip the system buffer cache? I've seen big benefits for using directio when the data files have been

Fwd: Re: [zfs-discuss] 15 minute fdsync problem and ZFS: Solved

2006-06-23 Thread Tao Chen
I should copy this to the list.-- Forwarded message --On 6/23/06, Joe Little [EMAIL PROTECTED] wrote: I can post back to Roch what this latency is. I think the latency is aconstant regardless of the zil or not. all that I do by disabling thezil is that I'm able to submit larger

Re: Fwd: Re: [zfs-discuss] 15 minute fdsync problem and ZFS: Solved

2006-06-23 Thread Tao Chen
On 6/23/06, Richard Elling [EMAIL PROTECTED] wrote: comment on analysis below...Tao Chen wrote: === Top 5 Devices with largest number of I/Os === DEVICEREAD AVG.ms MBWRITE AVG.ms MBIOs SEEK -- -- - -- - sd16 0.340 4948 387.88413 4954 0% sd26 0.250

Re: [zfs-discuss] ZFS bechmarks w/8 disk raid - Quirky results, any thoughts?

2006-07-19 Thread Tao Chen
On 7/17/06, Jonathan Wheeler [EMAIL PROTECTED] wrote: Hi All,I've just built an 8 disk zfs storage box, and I'm in the testing phase before I put it into production. I've run into some unusual results, and I was hoping the community could offer some suggestions. I've bascially made the switch to

[zfs-discuss] Apple Time Machine

2006-08-07 Thread Tao Chen
I am reading the live coverage of WWDC keynote here:http://www.macrumorslive.com/web/They talked about a new feature in OS X/Leopard: Time Machine. Does it sound like instant snapshot and rollback to you?I don't know how else this can be implemented.10:37 am with time machine, you can get those

Re: [zfs-discuss] Apple Time Machine

2006-08-07 Thread Tao Chen
On 8/7/06, Tim Foster [EMAIL PROTECTED] wrote: David Magda wrote: Well, they've ported Dtrace: ..now built into Mac OS X Leopard. Xray. Because it's 2006.Uh right and they're actually shipping it in 2007. Apple marketing. Anyone want to start printing t-shirts:DTrace Time Machine in OpenSolaris.

Re: [zfs-discuss] Apple Time Machine

2006-08-07 Thread Tao Chen
On 8/7/06, Eric Schrock [EMAIL PROTECTED] wrote: On Mon, Aug 07, 2006 at 01:19:14PM -1000, David J. Orman wrote: (actually did they give OpenSolaris a name check at all when they mentioned DTrace ?) Nope, not that I can see. Apple's pretty notorious for that kind of oversight. I used to work

Re: [zfs-discuss] Apple Time Machine

2006-08-07 Thread Tao Chen
On 8/7/06, Robert Gordon [EMAIL PROTECTED] wrote: On Aug 7, 2006, at 7:17 PM, Tao Chen wrote: In terms of openness, Sun and Apple are going opposite directions IMHO, interesting situation :) TaoApple just released the Darwin Kernel code xnu-792-10.96the equivalent of 10.4.7 for intel machines

Re: [zfs-discuss] Apple Time Machine

2006-08-07 Thread Tao Chen
On 8/7/06, Bryan Cantrill [EMAIL PROTECTED] wrote: We've had a great relationship with Apple at the engineering level -- andindeed, Team DTrace just got back from dinner with the Apple engineersinvolved with the port.More details here:

Re: [zfs-discuss] ZFS write throttling

2008-02-15 Thread Tao Chen
On 2/15/08, Roch Bourbonnais [EMAIL PROTECTED] wrote: Le 15 févr. 08 à 11:38, Philip Beevers a écrit : [...] Obviously this isn't good behaviour, but it's particularly unfortunate given that this checkpoint is stuff that I don't want to retain in any kind of cache anyway - in fact,