[Gluster-users] Bandwidth and latency requirements

[Colin Coe]

Apologies for the late reply.

Further to this, if my Linux clients are connecting uing glusterfs-fuse and
I have my volumes defined like this:
dc1srv1:/gv_fileshare dc2srv1:/gv_fileshare dc1srv2:/gv_fileshare
dc2srv2:/gv_fileshare (replica 2)

How do I ensure that clients in dc1 prefer dc1srv1 and dc1srv2 while
clients in dc2 prefer the dc2 servers?

Is it simply a matter of ordering in /etc/fstab?

Thanks


On Fri, Sep 29, 2017 at 2:29 PM, Karan Sandha <ksandha at redhat.com> wrote:

> It was simple emulation of network packets on the port of the server node
> using tc tool tc qdisc add dev <port> root netem delay <time>ms. The
> files were created using dd tool (in-built in linux) and mkdir. Post the
> IO's we verified with no pending heals.
>
>
> Thanks & Regards
>
>
> On Thu, Sep 28, 2017 at 2:06 PM, Arman Khalatyan <arm2arm at gmail.com>
> wrote:
>
>> Interesting table Karan!,
>> Could you please tell us how you did  the benchmark? fio or iozone
>> orsimilar?
>>
>> thanks
>> Arman.
>>
>> On Wed, Sep 27, 2017 at 1:20 PM, Karan Sandha <ksandha at redhat.com> wrote:
>>
>>> Hi Collin,
>>>
>>> During our arbiter latency testing for completion of ops we found the
>>> below results:-  an arbiter node in another data centre and both the data
>>> bricks in the same data centre,
>>>
>>> 1) File-size 1 KB (10000 files )
>>> 2) mkdir
>>>
>>>
>>> Latency
>>>
>>> 5ms
>>>
>>> 10ms
>>>
>>> 20ms
>>>
>>> 50ms
>>>
>>> 100ms
>>>
>>> 200ms
>>>
>>> Ops
>>>
>>> Create
>>>
>>> 755 secs
>>>
>>> 1410 secs
>>>
>>> 2717 secs
>>>
>>> 5874 secs
>>>
>>> 12908 sec
>>>
>>> 26113 sec
>>>
>>> Mkdir
>>>
>>> 922 secs
>>>
>>> 1725 secs
>>>
>>> 3325 secs
>>>
>>> 8127 secs
>>>
>>> 16160 sec
>>>
>>> 30079 sec
>>>
>>>
>>> Thanks & Regards
>>>
>>> On Mon, Sep 25, 2017 at 5:40 AM, Colin Coe <colin.coe at gmail.com> wrote:
>>>
>>>> Hi all
>>>>
>>>> I've googled but can't find an answer to my question.
>>>>
>>>> I have two data centers.  Currently, I have a replica (count of 2 plus
>>>> arbiter) in one data center but is used by both.
>>>>
>>>> I want to change this to be a distributed replica across the two data
>>>> centers.
>>>>
>>>> There is a 20Mbps pipe and approx 22 ms latency. Is this sufficient?
>>>>
>>>> I really don't want to do the geo-replication in its current form.
>>>>
>>>> Thanks
>>>>
>>>> CC
>>>>
>>>> _______________________________________________
>>>> Gluster-users mailing list
>>>> Gluster-users at gluster.org
>>>> http://lists.gluster.org/mailman/listinfo/gluster-users
>>>>
>>>
>>>
>>>
>>> --
>>>
>>> KARAN SANDHA
>>>
>>> ASSOCIATE QUALITY ENGINEER
>>>
>>> Red Hat Bangalore <https://www.redhat.com/>
>>>
>>> ksandha at redhat.com    M: 9888009555     IM: Karan on @irc
>>> <https://red.ht/sig>
>>> TRIED. TESTED. TRUSTED. <https://redhat.com/trusted>
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>>
>>
>
>
> --
>
> KARAN SANDHA
>
> ASSOCIATE QUALITY ENGINEER
>
> Red Hat Bangalore <https://www.redhat.com/>
>
> ksandha at redhat.com    M: 9888009555     IM: Karan on @irc
> <https://red.ht/sig>
> TRIED. TESTED. TRUSTED. <https://redhat.com/trusted>
> @redhatnews <https://twitter.com/redhatnews>   Red Hat
> <https://www.linkedin.com/company/red-hat>   Red Hat
> <https://www.facebook.com/RedHatInc>
>
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