l stripe has to be
> read or write.
>
> Cheers
>
> --
> Cédric Lemarchand
>
> > Le 5 juin 2014 à 22:56, Timofey Koolin a écrit :
> >
> > Do for every read/write rbd read/write full block of data (4MB) or rbd can
> > read/wite part of block?
> >
>
Do for every read/write rbd read/write full block of data (4MB) or rbd can
read/wite part of block?
For example - I have a 500MB file (database) and need random read/write by
blocks about 1-10Kb.
Do for every read 1 Kb rbd will read 4MB from hdd?
for write?
___
Is this mean about I can stop updates for any potential downtime operation,
then update to next release without downtime?
> On Tue, Apr 29, 2014 at 01:13:25PM +0200, Wido den Hollander wrote:
>> When you go from the major release to another one there is no
>> problem. Dumpling -> Emperor -> Firef
tor
instance.
Similar incompatible changes was few times. You can find it by word “protocol”
on the release notes page.
I want reserve storage for the situation when rolling update with incompatible
components will fail.
>
>
>> Le 28 avr. 2014 à 17:59, Timofey Koolin a écrit :
04/28/2014 05:59 PM, Timofey Koolin wrote:
>> Is a setting for change the behavior to return read error instead of block
>> read?
>>
>> I think it is more reasonable behavior because it is similar to bad block on
>> HDD: it can’t be read.
>>
>> Or may b
monitors
1 down monitor
2 old monitors.
> On 04/28/2014 02:35 PM, Timofey Koolin wrote:
>> What will happened if RBD lose all copied of data-block and I read the block?
>>
>
> The read to the object will block until a replica comes online to serve it.
>
> Remember this w
What will happened if RBD lose all copied of data-block and I read the block?
Context:
I want use RDB as main storage with replication factor 1 and drbd for
replication on non rbd storage by client side.
For example:
Computer1:
1. connect rbd as /dev/rbd15
2. use rbd as disk for drbd
Computer2:
ample
-backups).
2013/9/18 Laurent Barbe
> Sorry, I don't really know where is the problem.
> I hope someone from the mailing you will be able to respond. I am
> interested to understand.
>
> Laurent
>
> Le 18/09/2013 18:08, Timofey Koolin a écrit :
>
>>
Is lost journal mean that I lost all data from this osd?
And I must have HA (raid-1 or similar) journal storage if I use data
without replication?
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Blog: www.rekby.ru
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I use ceph 0.67.2.
When I start
ceph-osd -i 0
or
ceph-osd -i 1
it start one process, but it process open few tcp-ports, is it normal?
netstat -nlp | grep ceph
tcp0 0 10.11.0.73:6789 0.0.0.0:* LISTEN
1577/ceph-mon - mon
tcp0 0 10.11.0.73:6800
in ceph 0.67
cat /opt/ceph/current/bin/ceph | head -n 1
#!/usr/bin/python
if /usr/bin/python is python 3 I have error:
ceph auth get-or-create client.admin
File "/opt/ceph/current/bin/ceph", line 192
print '\n', s, '\n', '=' * len(s)
it is syntax of python2.
I propose change #!/usr/bin/pyt
, Oliver Daudey wrote:
>
>> Hey Timofey,
>>
>> On za, 2013-09-07 at 18:52 +0400, Timofey Koolin wrote:
>> > Is anywhere documentation for manual install/modify ceph cluster
>> > WITHOUT ceph-deploy?
>>
>> There used to be a 5 minute quick start
Is anywhere documentation for manual install/modify ceph cluster WITHOUT
ceph-deploy?
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I have read about support image format 2 in 3.9 kernel.
Is 3.9/3.10 kernel support rbd images format 2 now (I need connect to
images, cloned from snapshot)?
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Is way to know real size of rbd image and rbd snapshots?
rbd ls -l write declared size of image, but I want to know real size.
--
Blog: www.rekby.ru
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Is way to exclusive map rbd?
For example - I map on host A, then I try map it on host B. I want fail
map on host B while it mapped to host A.
I read about lock command, I want atomic lock and mount rbd for one host
and auto unlock it when host A fail.
--
Blog: www.rekby.ru
_
ceph -v
ceph version 0.61.3 (92b1e398576d55df8e5888dd1a9545ed3fd99532)
mount.ceph l6:/ /ceph -o name=admin,secret=...
mount error 12 = Cannot allocate memory
I have cluster with 1 mon, 2 osd, ipv6 network.
rbd work fine.
--
Blog: www.rekby.ru
___
cep
Is snapshot time depend from image size?
Do snapshot create consistent state of image for moment at start snapshot?
For example if I have file system on don't stop IO before start snapshot -
Is it worse than turn of power during IO?
--
Blog: www.rekby.ru
_
I have test cluster
3 node:
1 - osd.0 mon.a mds.a
2 - osd.1
3 - empty
I create osd.2:
node1# ceph osd create
node3# mkdir /var/lib/ceph/osd/ceph-2
node3# mkfs.xfs /dev/sdb
node3# mount /dev/sdb /var/lib/ceph/osd/ceph-2
node3# ceph-osd -i 2 --mkfs --mkkey
copy keyring from node 3 to node 1 in ro
Can anybody repeat is test in own production cluster?
2013/4/4 Timofey Koolin
> I have centos 6.3 with kernel 3.8.4-1.el6.elrepo.x86_64 from elrepo.org.
> Cephfs mount with kernel module.
>
> [root@localhost t1]# wget
> http://joomlacode.org/gf/download/frsrelease/17965/784
I have centos 6.3 with kernel 3.8.4-1.el6.elrepo.x86_64 from elrepo.org.
Cephfs mount with kernel module.
[root@localhost t1]# wget
http://joomlacode.org/gf/download/frsrelease/17965/78413/Joomla_3.0.3-Stable-Full_Package.tar.gz
[root@localhost t1]# time tar -zxf Joomla_3.0.3-Stable-Full_Package.t
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