[zfs-discuss] Re: Optimal strategy (add or replace disks) to build a cheap and raidz?

2007-05-06 Thread Christian Rost
I've an EX-3403 Marvell 88SX6081 Controller. Unfortunately it is revision 07 which seems to be not supported until now. I don't see any disks ... :-( This is already discussed here: http://www.opensolaris.org/jive/thread.jspa?threadID=13533 This message posted from opensolaris.org

[zfs-discuss] Re: Re: recovered state after system crash

2007-05-06 Thread kyusun Chang
So what are your concerns here? Correctness or performance? It is not about correctness. In journaling filesystems, builders seems to pick either recover all filesystem transactions up to the point of crash or you may lose last few transactions, or make it an option (e.g. VxFS delayed log).

Re: [zfs-discuss] Optimal strategy (add or replace disks) to build a cheap and raidz?

2007-05-06 Thread Harold Ancell
Date: Sat, 05 May 2007 08:17:41 -0700 From: Richard Elling [EMAIL PROTECTED] Harold Ancell wrote: At 04:41 AM 5/5/2007, Christian Rost wrote: For what and when to buy, I observe two things: at some point you HAVE to buy something; with disks exceeding Moores Law (aren't they

[zfs-discuss] does every fsync() require O(log n) platter-writes?

2007-05-06 Thread Adam Megacz
After reading through the ZFS slides, it appears to be the case that if ZFS wants to modify a single data block, if must rewrite every block between that modified block and the uberblock (root of the tree). Is this really the case? If so, does this mean that every commit operation (ie every

Re: [zfs-discuss] does every fsync() require O(log n) platter-writes?

2007-05-06 Thread Neil . Perrin
Adam Megacz wrote: After reading through the ZFS slides, it appears to be the case that if ZFS wants to modify a single data block, if must rewrite every block between that modified block and the uberblock (root of the tree). Is this really the case? That is true when commiting the

Re: [zfs-discuss] Re: does every fsync() require O(log n) platter-writes?

2007-05-06 Thread Neil . Perrin
Adam Megacz wrote: Ah, okay. The slides I read said that in ZFS there is no journal -- not needed (slide #9): http://www.opensolaris.org/os/community/zfs/docs/zfs_last.pdf I guess the slides are out of date in light of the ZFS Intent Log journal? Yes , I can understand your confusion.