[Gluster-users] Performance

[Alex Crow]

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 at julianfamily.org> 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 at 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 at 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 at gmail.com 
>> <mailto:ciclopeblu at 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 at 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 at 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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>>
>>
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>
>
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