Re: [Users] Creation of preallocated disk with Gluster replication

Adding gluster-users. On 01/02/2014 08:50 PM, gregoire.leroy(a)retenodus.net 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