Re: VM nocow, should VM software set +C by default?

2014-02-25 Thread Justin Ossevoort
I think in principle: No. It is something that should be documented as advise in the VM software documentation. But things like storage management is the domain of the distribution or systems administrator. There might be a situation where the VM software can directly use a btrfs filesystem

Re: brtfs on top of dmcrypt with SSD. No corruption iff write cache off?

2012-02-22 Thread Justin Ossevoort
On 15/02/12 17:59, Hugo Mills wrote: It's a temporary location (6 months and counting) while kernel.org is static-pages-only. Hugo. Couldn't btrfs.wiki.kernel.org be made a CNAME for btrfs.ipv5.de for the time being until kernel.org is up and running? Or alternatively all requests

Re: [PATCH 7/7] btrfs: don't BUG_ON allocation errors in btrfs_drop_snapshot

2011-07-26 Thread Justin Ossevoort
On 25/07/11 23:10, Mark Fasheh wrote: On Fri, Jul 22, 2011 at 09:45:19AM +0900, Tsutomu Itoh wrote: (2011/07/22 4:48), Mark Fasheh wrote: In addition to properly handling allocation failure from btrfs_alloc_path, I also fixed up the kzalloc error handling code immediately below it.

Re: btrfs wishlist

2011-03-02 Thread Justin Ossevoort
On 02/03/11 10:05, Thomas Bellman wrote: Will the stripe *width* be configurable? If I have something like a Sun Thor with 48 drives, I would probably not be entirely comfortable having 46 drives data and 2 drives parity; too little redundancy for my tastes. 2 drives parity per 10 drives

Re: Update to Project_ideas wiki page

2010-11-18 Thread Justin Ossevoort
On 18/11/10 15:31, Bart Noordervliet wrote: On Wed, Nov 17, 2010 at 19:07, Gordan Bobic gor...@bobich.net wrote: Since BTRFS is already doing some relatively radical things, I would like to suggest that RAID5 and RAID6 be deemed obsolete. RAID5 isn't safely usable for arrays bigger than about

Re: Intermittent no space errors

2010-07-29 Thread Justin Ossevoort
Hello, Pherhaps it would be a good idea to add a tracepoint before each return ENOSPC? It shouldn't matter too much since a reasonable assumption would be that filesystems aren't running out of space most of the time. And you can use 'perf' for more insight in these cases without recompiling the