Re: [Gluster-users] Performance

Mon, 31 Oct 2016 08:34:45 -0700 

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 <ciclope...@gmail.com 
<mailto:ciclope...@gmail.com>> 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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