Did you tweak some options belonging to the performance translator, such as io-thread-count? If not, try to increase it to 64 from 16 (default).
--
On Mon, Dec 8, 2014 at 12:10 PM, Andrew Smith <smith.andrew.james@xxxxxxxxx> wrote:
QDR Infiniband has a max theoretical input of 40Gbits, or about 4GB/s.
My LSI controller RAID controllers typically deliver about 0.5-1.0 GB/s
for direct disk access.
I have tested it many ways. I typically start jobs on many clients and
measure the total network bandwidth on the servers by monitoring the
totals in /proc/net/dev or just count the bytes on the clients. I can’t
get more than about 300MB/s from each server. With a single job on
a single client, I can’t get more than about 100-150MB/s.
On Dec 7, 2014, at 9:15 PM, Franco Broi <franco.broi@xxxxxxxxxx> wrote:
>
> Our theoretical peak throughput is about 4Gbytes/sec or 4 x 10Gbits/Sec,
> you can see from the graph that the maximum recorded is 3.6GB/Sec. This
> was probably during periods of large sequential IO.
>
> We have a small cluster of clients (10) with 10Gbit ethernet but the
> majority of our machines (130) have gigabit. The throughput maximum for
> the 10Gbit connected machines was just over 3GBytes/Sec with individual
> machines recording about 800MB/Sec.
>
> We can easily saturate our 10Gbit links on the servers as each JBOD is
> capable of better than 500MB/Sec but with mixed sequential/random access
> it seems like a good compromise.
>
> We have another 2 server Gluster system with the same specs and we get
> 1.8GB/Sec reads and 1.1GB/Sec writes.
>
> What are you using to measure your throughput?
>
> On Sun, 2014-12-07 at 20:52 -0500, Andrew Smith wrote:
>> I have a similar system with 4 nodes and 2 bricks per node, where
>> each brick is a single large filesystem (4TB x 24 RAID 6). The
>> computers are all on QDR Infinband with Gluster using IPOIB. I
>> have a cluster of Infiniband clients that access the data on the
>> servers. I can only get about 1.0 to 1.2 GB/s throughput with my
>> system though. Can you tell us the peak throughput that you are
>> getting. I just don’t have a sense of what I should expect from
>> my system. A similar Luster setup could achieve 2-3 GB/s, which
>> I attributed to the fact that it didn’t use IPOIB, but instead used
>> RDMA. I’d really like to know if I am wrong here and there is
>> some configuration I can tweak to make things faster.
>>
>> Andy
>>
>> On Dec 7, 2014, at 8:43 PM, Franco Broi <franco.broi@xxxxxxxxxx> wrote:
>>
>>> On Fri, 2014-12-05 at 14:22 +0000, Kiebzak, Jason M. wrote:
>>>> May I ask why you chose to go with 4 separate bricks per server rather than one large brick per server?
>>>
>>> Each brick is a JBOD with 16 disks running RAIDZ2. Just seemed more
>>> logical to keep the bricks and ZFS filesystems confined to physical
>>> hardware units, ie I could disconnect a brick and move it to another
>>> server.
>>>
>>>>
>>>> Thanks
>>>> Jason
>>>>
>>>> -----Original Message-----
>>>> From: gluster-users-bounces@xxxxxxxxxxx [mailto:gluster-users-bounces@xxxxxxxxxxx] On Behalf Of Franco Broi
>>>> Sent: Thursday, December 04, 2014 7:56 PM
>>>> To: gluster-users@xxxxxxxxxxx
>>>> Subject: A year's worth of Gluster
>>>>
>>>>
>>>> 1 DHT volume comprising 16 50TB bricks spread across 4 servers. Each server has 10Gbit Ethernet.
>>>>
>>>> Each brick is a ZOL RADIZ2 pool with a single filesystem.
>>>
>>>
>>> _______________________________________________
>>> Gluster-users mailing list
>>> Gluster-users@xxxxxxxxxxx
>>> http://supercolony.gluster.org/mailman/listinfo/gluster-users
>>
>
>
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