On Thu, Aug 1, 2013 at 9:45 AM, majianpeng majianp...@gmail.com wrote:
On Wed, Jul 31, 2013 at 3:32 PM, majianpeng majianp...@gmail.com wrote:
[snip]
Test case
A: touch file
dd if=file of=/dev/null bs=5M count=1 iflag=direct
B: [data(2M)|hole(2m)][data(2M)]
dd if=file of=/dev/null
On Thu, Aug 1, 2013 at 2:30 PM, majianpeng majianp...@gmail.com wrote:
On Thu, Aug 1, 2013 at 9:45 AM, majianpeng majianp...@gmail.com wrote:
On Wed, Jul 31, 2013 at 3:32 PM, majianpeng majianp...@gmail.com wrote:
[snip]
Test case
A: touch file
dd if=file of=/dev/null bs=5M count=1
Hi,
i still have recovery issues with cuttlefish. After the OSD comes back
it seem to hang for around 2-4 minutes and then recovery seems to start
(pgs in recovery_wait start to decrement). This is with ceph 0.61.7. I
get a lot of slow request messages an hanging VMs.
What i noticed today is
Hello,
Sorry for the late answer as I was travelling lately.
The LFS works has been in a heavy state of work in progress by Peter
(in CC) and others there is some documentation in this review :
https://review.openstack.org/#/c/30051/
(summarized in Pete's gist here
From: Sha Zhengju handai@taobao.com
Following we will begin to add memcg dirty page accounting around
__set_page_dirty_
{buffers,nobuffers} in vfs layer, so we'd better use vfs interface to avoid
exporting
those details to filesystems.
Signed-off-by: Sha Zhengju handai@taobao.com
---
Hi,
Did anyone get a chance to look at this change?
Any comments/feedback/ridicule would be appreciated.
Cheers, David
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Hi,
I've opened a pull request with some additional fixes for this issue:
https://github.com/ceph/ceph/pull/478
Danny
Am 30.07.2013 09:53, schrieb Erik Logtenberg:
Hi,
This patch adds two buildrequires to the ceph.spec file, that are needed
to build the rpms under Fedora. Danny Al-Gaaf
Second this. Also for long-lasting snapshot problem and related
performance issues I may say that cuttlefish improved things greatly,
but creation/deletion of large snapshot (hundreds of gigabytes of
commited data) still can bring down cluster for a minutes, despite
usage of every possible
Hi Sam,
When the acting set changes order two chunks for the same object may co-exist
in the same placement group. The key should therefore also contain the chunk
number.
That's probably the most sensible comment I have so far. This document is
immensely useful (even in its current state)
DELETE can always be rolled forward, but there may be other operations
in the log that can't be (like an append). So we need to be able to
roll it back (I think) perform_write, read, try_rollback probably
don't matter to backfill, scrubbing. You are correct, we need to
include the chunk number
On 01/08/2013 18:42, Loic Dachary wrote:
Hi Sam,
When the acting set changes order two chunks for the same object may co-exist
in the same placement group. The key should therefore also contain the chunk
number.
That's probably the most sensible comment I have so far. This document
On Thu, 1 Aug 2013, David Disseldorp wrote:
Hi,
Did anyone get a chance to look at this change?
Any comments/feedback/ridicule would be appreciated.
Sorry, not yet--and Greg just headed out for vacation yesterday. It's on
my list to look at when I have some time tonight or tomorrow,
We've tagged and pushed out packages for another release candidate for
Dumpling. At this point things are looking very good. There are a few
odds and ends with the CLI changes but the core ceph functionality is
looking quite stable. Please test!
Packages are available in the -testing repos:
On Thu, 1 Aug 2013, Yan, Zheng wrote:
On Thu, Aug 1, 2013 at 7:51 PM, Sha Zhengju handai@gmail.com wrote:
From: Sha Zhengju handai@taobao.com
Following we will begin to add memcg dirty page accounting around
__set_page_dirty_
{buffers,nobuffers} in vfs layer, so we'd better use
Can you reproduce and attach the ceph.log from before you stop the osd
until after you have started the osd and it has recovered?
-Sam
On Thu, Aug 1, 2013 at 1:22 AM, Stefan Priebe - Profihost AG
s.pri...@profihost.ag wrote:
Hi,
i still have recovery issues with cuttlefish. After the OSD comes
m 01.08.2013 20:34, schrieb Samuel Just:
Can you reproduce and attach the ceph.log from before you stop the osd
until after you have started the osd and it has recovered?
-Sam
Sure which log levels?
On Thu, Aug 1, 2013 at 1:22 AM, Stefan Priebe - Profihost AG
s.pri...@profihost.ag wrote:
For now, just the main ceph.log.
-Sam
On Thu, Aug 1, 2013 at 11:34 AM, Stefan Priebe s.pri...@profihost.ag wrote:
m 01.08.2013 20:34, schrieb Samuel Just:
Can you reproduce and attach the ceph.log from before you stop the osd
until after you have started the osd and it has recovered?
-Sam
It doesn't have log levels, should be in /var/log/ceph/ceph.log.
-Sam
On Thu, Aug 1, 2013 at 11:36 AM, Samuel Just sam.j...@inktank.com wrote:
For now, just the main ceph.log.
-Sam
On Thu, Aug 1, 2013 at 11:34 AM, Stefan Priebe s.pri...@profihost.ag wrote:
m 01.08.2013 20:34, schrieb Samuel
I am also seeing recovery issues with 0.61.7. Here's the process:
- ceph osd set noout
- Reboot one of the nodes hosting OSDs
- VMs mounted from RBD volumes work properly
- I see the OSD's boot messages as they re-join the cluster
- Start seeing active+recovery_wait, peering, and
Mike we already have the async patch running. Yes it helps but only
helps it does not solve. It just hides the issue ...
Am 01.08.2013 20:54, schrieb Mike Dawson:
I am also seeing recovery issues with 0.61.7. Here's the process:
- ceph osd set noout
- Reboot one of the nodes hosting OSDs
Hi,
I was wondering why there is no native Java implementation of librados.
I'm thinking about creating one and I'm thus looking for a documentation
of the RADOS protocol.
Also the way I see it librados implements the crush algorithm. Is there
a documentation for it?
Also an educated guess
Can you dump your osd settings?
sudo ceph --admin-daemon ceph-osd.osdid.asok config show
-Sam
On Thu, Aug 1, 2013 at 12:07 PM, Stefan Priebe s.pri...@profihost.ag wrote:
Mike we already have the async patch running. Yes it helps but only helps it
does not solve. It just hides the issue ...
Am
Hi Niklas,
The RADOS reference implementation in C++ is quite large. Reproducing
it all in another language would be interesting, but I'm curious if
wrapping the C interface is not an option for you? There are Java
bindings that are being worked on here:
https://github.com/wido/rados-java.
There
Hi Sam,
I'm under the impression that
https://github.com/athanatos/ceph/blob/wip-erasure-coding-doc/doc/dev/osd_internals/erasure_coding.rst#distinguished-acting-set-positions
assumes acting[0] stores all chunk[0], acting[1] stores all chunk[1] etc.
The chunk rank does not need to match the OSD
I think there are some tricky edge cases with the above approach. You
might end up with two pg replicas in the same acting set which happen
for reasons of history to have the same chunk for one or more objects.
That would have to be detected and repaired even though the object
would be missing
On Fri, 2 Aug 2013, majianpeng wrote:
cephfs . show_layout
layyout.data_pool: 0
layout.object_size: 4194304
layout.stripe_unit: 4194304
layout.stripe_count: 1
TestA:
dd if=/dev/urandom of=test bs=1M count=2 oflag=direct
dd if=/dev/urandom of=test bs=1M count=2 seek=4
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