Kandalf ®
2015-Oct-16 20:26 UTC
[Gluster-users] gluster 3.7.5 low speed on write and heavy load
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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Alastair Neil
2015-Oct-16 20:31 UTC
[Gluster-users] gluster 3.7.5 low speed on write and heavy load
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 > > > > >-------------- next part -------------- An HTML attachment was scrubbed... URL: <http://www.gluster.org/pipermail/gluster-users/attachments/20151016/9c9f3193/attachment.html>