Hi, Thank you for your reply. I'm sorry but I don't think so. This storage is fast, because it is a SSD based storage, and I can read/write to it with fast performance. I know, in virtual environment the I/O always slowest than on physical, but here I have a very large difference. Also, I use ext4 FS.
Thanks Tibor ----- 2015. szept.. 8., 0:40, Alex McWhirter alexmcwhir...@triadic.us írta: > Unless you're using a caching filesystem like zfs, then you're going to be > limited by how fast your storage back end can actually right to disk. Unless > you have a quite large storage back end, 10gbe is probably faster than your > disks can read and write. > > On Sep 7, 2015 4:26 PM, Demeter Tibor <tdeme...@itsmart.hu> wrote: >> >> Hi All, >> >> I have to create a test environment for testing purposes, because we need to >> testing our new 10gbe infrastructure. >> One server that have a 10gbe nic - this is the vdsm host and ovirt portal. >> One server that have a 10gbe nic - this is the storage. >> >> Its connected to each other throught a dlink 10gbe switch. >> >> Everything good and nice, the server can connect to storage, I can make and >> run >> VMs, but the storage performance from inside VM seems to be 1Gb/sec only. >> I did try the iperf command for testing connections beetwen servers, and it >> was >> 9.40 GB/sec. I have try to use hdparm -tT /dev/mapper/iscsidevice and also it >> was 400-450 MB/sec. I've got same result on storage server. >> >> So: >> >> - hdparm test on local storage ~ 400 mb/sec >> - hdparm test on ovirt node server through attached iscsi device ~ 400 Mb/sec >> - hdparm test from inside vm on local virtual disk - 93-102 Mb /sec >> >> The question is : Why? >> >> ps. I Have only one ovirtmgmt device, so there are no other networks. The >> router >> is only 1gbe/sec, but i've tested and the traffic does not going through >> this. >> >> Thanks in advance, >> >> Regards, > > Tibor _______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
