Re: Data Deduplication with the help of an online filesystem check

2009-05-05 Thread Heinz-Josef Claes
On Tue, 5 May 2009 07:29:45 +1000 Dmitri Nikulin dniku...@gmail.com wrote: On Tue, May 5, 2009 at 5:11 AM, Heinz-Josef Claes hjcl...@web.de wrote: Hi, during the last half year I thought a little bit about doing dedup for my backup program: not only with fixed blocks (which is implemented),

Re: Data Deduplication with the help of an online filesystem check

2009-05-05 Thread Thomas Glanzmann
Hello Jan, * Jan-Frode Myklebust janfr...@tanso.net [090504 20:20]: thin or shallow clones sounds more like sparse images. I believe linked clones is the word for running multiple virtual machines off a single gold image. Ref, the VMware View Composer section of: not exactly. VMware has one

BUG at fs/buffer.c:2933 during umount

2009-05-05 Thread Christian Kujau
Hi, I could not find this anywhere else reported, so here we go: creating a new btrfs filesystem (btrfs-progs-unstable from git) and mounting it succeeds, unmounting however fails with the kernel messages attached to this mail. After that, I can still read and write to the btrfs mount, but

Re: BUG at fs/buffer.c:2933 during umount

2009-05-05 Thread Chris Mason
On Tue, 2009-05-05 at 12:23 -0700, Christian Kujau wrote: Hi, I could not find this anywhere else reported, so here we go: creating a new btrfs filesystem (btrfs-progs-unstable from git) and mounting it succeeds, unmounting however fails with the kernel messages attached to this mail.

Re: BUG at fs/buffer.c:2933 during umount

2009-05-05 Thread Christian Kujau
On Tue, 5 May 2009, Chris Mason wrote: Somehow xen is turning a barrier request into an IO error. That's really quite strange, but you can mount -o nobarrier. Thanks for the quick reply - yes, that helped. So, is that something I should report to the Xen folks? These other filesystems I can

Re: BUG at fs/buffer.c:2933 during umount

2009-05-05 Thread Chris Mason
On Tue, 2009-05-05 at 12:51 -0700, Christian Kujau wrote: On Tue, 5 May 2009, Chris Mason wrote: Somehow xen is turning a barrier request into an IO error. That's really quite strange, but you can mount -o nobarrier. Thanks for the quick reply - yes, that helped. So, is that something I