On 05/05/2015 08:55 AM, Andrija Panic wrote:
> Hi,
>
> small update:
>
> in 3 months - we lost 5 out of 6 Samsung 128Gb 850 PROs (just few days in
> between of each SSD death) - cant believe it - NOT due to wearing out... I
> really hope we got efective series from suplier...
>
That's ridiculou
On 05/02/2015 02:53 AM, Matthew Monaco wrote:
> It looks like you can get a pretty good performance benefit from using ext4
> with
> an "external" SSD journal. Has anyone tried this with ceph? Take, for
> example, a
> system with a 3:1 HDD to SSD ratio. What are some
It looks like you can get a pretty good performance benefit from using ext4 with
an "external" SSD journal. Has anyone tried this with ceph? Take, for example, a
system with a 3:1 HDD to SSD ratio. What are some of your thoughts?
3 ceph journal partitions + 3 ext4 journal partitions per SSD for th
On 04/14/2015 08:45 AM, Jason Dillaman wrote:
> The C++ librados API uses STL strings so it can properly handle embedded
> NULLs. You can make a backup copy of rbd_children using 'rados cp'.
> However, if you don't care about the snapshots and you've already flattened
> the all the images, you cou
On 04/13/2015 03:17 PM, Jason Dillaman wrote:
> Yes, when you flatten an image, the snapshots will remain associated to the
> original parent. This is a side-effect from how librbd handles CoW with
> clones. There is an open RBD feature request to add support for flattening
> snapshots as well
On 04/13/2015 07:51 AM, Jason Dillaman wrote:
> Can you add "debug rbd = 20" to your config, re-run the rbd command, and
> paste a link to the generated client log file?
>
I set both rbd and rados log to 20
VOL=volume-61241645-e20d-4fe8-9ce3-c161c3d34d55
SNAP="$VOL"@snapshot-d535f359-503a-4eaf-9
I have a pool used for RBD in a bit of an inconsistent state. Somehow, through
OpenStack, the data associated with a child volume was deleted. If I try to
unprotect the snapshot, librbd complains there is at least one child. If I try
to list out the children, librbd errors out on looking up the ima
ournal partition and the rest a btrfs partition).
I just don't get the "by contrast." If the OSD is btrfs+rotational, then why
doesn't putting the journal on an SSD help (as much?) if writes are returned
after journaling?
> On Sun, Feb 8, 2015 at 8:48 PM, Matthew Monaco w
Hello!
*** Shameless plug: Sage, I'm working with Dirk Grunwald on this cluster; I
believe some of the members of your thesis committee were students of his =)
We have a modest cluster at CU Boulder and are frequently plagued by "requests
are blocked" issues. I'd greatly appreciate any insight or
