Re: Performance

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I last used GlusterFS around early 3.6. I could get great results for streaming large files. I was seeing up to 700MB/s with a DD test. Small file/metadata access wasn't right for our use, but for VMs it should be fine with a bit of tuning.

On 31 October 2016 15:33:06 GMT+00:00, Joe Julian <joe@xxxxxxxxxxxxxxxx> wrote:
On 10/31/2016 08:29 AM, Alastair Neil wrote:
What version of Gluster?  Are you using glusterfs or nfs mount?  Any other traffic on the network, is the cluster quiescent apart from your dd test?


What type of volume?

It does seem slow.  I have a three server cluster, using straight xfs over 10G with Gluster 3.8 and glusterfs mounts and I see:

[root@sb-c 192.168.10.49:VM]# sync; dd if=/dev/zero of=nfsp2 bs=1M count=1024; sync
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB) copied, 11.3322 s, 94.8 MB/s
[root@sb-c 192.168.10.49:VM]# sync; dd if=/dev/zero of=nfsp2 bs=1M count=10240; sync
10240+0 records in
10240+0 records out
10737418240 bytes (11 GB) copied, 117.854 s, 91.1 MB/s

this is on a cluster serving 5 ovirt nodes and about 60 running VMs.



On 25 October 2016 at 12:50, Service Mail <ciclopeblu@xxxxxxxxx> wrote:
Hello,

I have the following setup:

3x zfs raidz2 servers with a single gluster 3.8 replicated volume across a 10G network

Everything is working fine however performance looks very poor to me:


root@Client:/test_mount# sync; dd if=/dev/zero of=nfsp2 bs=1M count=1024; sync
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB, 1.0 GiB) copied, 32.1786 s, 33.4 MB/s

root@Client:/test_mount# sync; dd if=/dev/zero of=nfsp2 bs=1M count=10240; sync
10240+0 records in
10240+0 records out
10737418240 bytes (11 GB, 10 GiB) copied, 301.563 s, 35.6 MB/s

Are those reading normal? Where should I look to increase performance?

Thanks,

Ciclope




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