Kandalf ®
2015-Oct-16 20:42 UTC
[Gluster-users] gluster 3.7.5 low speed on write and heavy load
If I write with DD in linux locally to the same cluster node... or via network I
have 120MB/s. the full speed of te 1 Gbps.But if I write to an RAW Image File...
like vmdk in vmware... I have average of 20-40MB/s only.
On Friday, October 16, 2015 11:31 PM, Alastair Neil <ajneil.tech at
gmail.com> wrote:
I'm getting confused, 120 mb/s is less that 20 MB/s ?unless you mean
120MB/s?
On 16 October 2015 at 16:26, Kandalf ? <tinuro at yahoo.com> wrote:
No, is real speed. From any computer linux or esxi if I write via NFS with dd
utility I have this speed. But if I try to write to one raw file like esxi does
in vmdk, than the speed drops to 20-40mb/s. So my issue is low speed when I
write into raw image file (using losetup and DD on linux , or esxi vmdk - vm
guest)
On Friday, October 16, 2015 8:31 PM, Alastair Neil <ajneil.tech at
gmail.com> wrote:
is that a typo 120mb/s?? Is this volume replica 2 or distributed or both?
On 16 October 2015 at 08:05, Kandalf ? <tinuro at yahoo.com> wrote:
Hi,
I have 2 server with centos 7 and I want to make a replicate storage cluster for
the esxi.In both server I have 4 disk in raid 5 mdadm. The write speed on that
device is ~250-300MB/s all the time.I create xfs file system on the mdadm and I
exported that gluster volume via native fuse nfs v3 to the esxi.Read seed is
great but when I try to write to the guest vms I see 20-40MB/s only. I try the
test also with gluster distributed with only one brick to one server. If I take
one dd write from esxi to the cluster I receive 120mb/s the full ethernet link
speed. I also try to mount to linux that volumes and try dd write and the write
speed is 120mb/s.But if I try to mount an raw file image with losetup, or use
vmdk files, and if I write to them, the speed is 20-40MB/s and I see 12 load on
linux.Can someone help me?
Thanks!
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Kandalf ®
2015-Oct-16 20:43 UTC
[Gluster-users] gluster 3.7.5 low speed on write and heavy load
I also tried more gluster version but the same situation.If I use iscsi for
example to export a raw image... I have 120MB/s write speed.
On Friday, October 16, 2015 11:42 PM, Kandalf ? <tinuro at yahoo.com>
wrote:
If I write with DD in linux locally to the same cluster node... or via network
I have 120MB/s. the full speed of te 1 Gbps.But if I write to an RAW Image
File... like vmdk in vmware... I have average of 20-40MB/s only.
On Friday, October 16, 2015 11:31 PM, Alastair Neil <ajneil.tech at
gmail.com> wrote:
I'm getting confused, 120 mb/s is less that 20 MB/s ?unless you mean
120MB/s?
On 16 October 2015 at 16:26, Kandalf ? <tinuro at yahoo.com> wrote:
No, is real speed. From any computer linux or esxi if I write via NFS with dd
utility I have this speed. But if I try to write to one raw file like esxi does
in vmdk, than the speed drops to 20-40mb/s. So my issue is low speed when I
write into raw image file (using losetup and DD on linux , or esxi vmdk - vm
guest)
On Friday, October 16, 2015 8:31 PM, Alastair Neil <ajneil.tech at
gmail.com> wrote:
is that a typo 120mb/s?? Is this volume replica 2 or distributed or both?
On 16 October 2015 at 08:05, Kandalf ? <tinuro at yahoo.com> wrote:
Hi,
I have 2 server with centos 7 and I want to make a replicate storage cluster for
the esxi.In both server I have 4 disk in raid 5 mdadm. The write speed on that
device is ~250-300MB/s all the time.I create xfs file system on the mdadm and I
exported that gluster volume via native fuse nfs v3 to the esxi.Read seed is
great but when I try to write to the guest vms I see 20-40MB/s only. I try the
test also with gluster distributed with only one brick to one server. If I take
one dd write from esxi to the cluster I receive 120mb/s the full ethernet link
speed. I also try to mount to linux that volumes and try dd write and the write
speed is 120mb/s.But if I try to mount an raw file image with losetup, or use
vmdk files, and if I write to them, the speed is 20-40MB/s and I see 12 load on
linux.Can someone help me?
Thanks!
_______________________________________________
Gluster-users mailing list
Gluster-users at gluster.org
http://www.gluster.org/mailman/listinfo/gluster-users
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