Hello,
Do you need more informations about this issue ? Do you think this
problem is likely to show up in other cases ? I mean, is that an
expected behaviour with my environment, or is it unexpected ?
Is there a way to limit the bandwidth usage for creation of
pre-allocated disk so that it doesn't impact production ?
Thank you,
Regards,
Grégoire
Le 2014-01-02 17:42, Vijay Bellur a écrit :
Adding gluster-users.
On 01/02/2014 08:50 PM, gregoire.leroy@xxxxxxxxxxxxx wrote:
Hello,
I have a Gluster volume in distributed/replicated mode. I have 2
hosts.
When I try to create a VM with a preallocated disk, it uses 100% of
the
available CPU and bandwidth (I have 1 Gigabit network card).
The result is I can't even create a preallocated disk because the
engine
detects a network failure.
I get that kind of messages in /var/log/messages :
"
Jan 2 14:13:54 localhost sanlock[3811]: 2014-01-02 14:13:54+0100
167737
[3811]: s4 kill 21114 sig 15 count 1
Jan 2 14:13:54 localhost wdmd[3800]: test failed rem 51 now 167737
ping
167718 close 167728 renewal 167657 expire 167737 client 3811
sanlock_ef4978d6-5711-4e01-a0ec-7ffbd9 cdbe5d:1
"
And that in the Ovirt Gui :
"
2014-janv.-02, 15:35 Operation Add-Disk failed to complete.
2014-janv.-02, 15:35 Storage Pool Manager runs on Host HOST2 (Address:
X.X.X.X).
2014-janv.-02, 15:35 Invalid status on Data Center GlusterSewan.
Setting
Data Center status to Non Responsive (On host HOST2, Error: done).
2014-janv.-02, 15:35 State was set to Up for host HOST2.
2014-janv.-02, 15:33 Used Network resources of host HOST2 [98%]
exceeded
defined threshold [95%].
2014-janv.-02, 15:33 Add-Disk operation of test_Disk1 was initiated on
VM test by admin@internal.
I understand that the creation of a 10 Go disk image generates a lot
of
traffic, but is there a way to limit it so that it doesn't have an
impact on the production ? Furthermore, Why does it use so much CPU
ressources ? I can see on my monitoring graph a big peak of CPU usage
when I launched the operation (probably until 100%).
Do you happen to notice what is consuming CPU? Since the same cluster
does both virtualization and storage, a GigE network might get
saturated very quickly. Is it possible to separate out the management
and data/gluster traffic in this setup?
Regards,
Vijay
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