Hello Mark,
Not sure what version of glibc Wheezy has, but try to make sure you have
one that supports syncfs (you'll also need a semi-new kernel, 3.0+
should be fine).
Wheezy has a fairly recent kernel :
# uname -a
Linux ceph-osd-0 3.2.0-3-amd64 #1 SMP Mon Jul 23 02:45:17 UTC 2012
x86_64
...@ledeuns.net
Cc: ceph-devel@vger.kernel.org
Envoyé: Mercredi 22 Août 2012 14:35:28
Objet: Re: Ceph performance improvement
On 08/22/2012 03:54 AM, Denis Fondras wrote:
Hello all,
Hello!
David had some good comments in his reply, so I'll just add in a couple
of extra thoughts
On Wed, Aug 22, 2012 at 9:23 AM, Denis Fondras c...@ledeuns.net wrote:
Are you sure your osd data and journal are on the disks you think? The
/home paths look suspicious -- especially for journal, which often
should be a block device.
I am :)
...
-rw-r--r-- 1 root root 1048576000 août 22
On Wed, Aug 22, 2012 at 06:29:12PM +0200, Tommi Virtanen wrote:
(...)
Your journal is a file on a btrfs partition. That is probably a bad
idea for performance. I'd recommend partitioning the drive and using
partitions as journals directly.
Hi Tommi,
can you please teach me how to use the
On Wed, Aug 22, 2012 at 12:12 PM, Dieter Kasper (KD)
d.kas...@kabelmail.de wrote:
Your journal is a file on a btrfs partition. That is probably a bad
idea for performance. I'd recommend partitioning the drive and using
partitions as journals directly.
can you please teach me how to use the
On 22/08/12 22:24, David McBride wrote:
On 22/08/12 09:54, Denis Fondras wrote:
* Test with dd from the client using CephFS :
# dd if=/dev/zero of=testdd bs=4k count=4M
17179869184 bytes (17 GB) written, 338,29 s, 50,8 MB/s
Again, the synchronous nature of 'dd' is probably severely affecting
