[Gluster-users] using a preferred node ?

[Mathieu Chateau]

Hello Ravi,

thanks for clearing things up.

Anything on the roadmap that would help my case?

Cordialement,
Mathieu CHATEAU
http://www.lotp.fr

2015-06-08 6:37 GMT+02:00 Ravishankar N <ravishankar at redhat.com>:

>
>
> On 06/06/2015 12:49 AM, Mathieu Chateau wrote:
>
> Hello,
>
>  sorry to bother again but I am still facing this issue.
>
>  client still looks on the "other side" and not using the node declared
> in fstab:
> prd-sta-sto01:/gluster-preprod /mnt/gluster-preprod glusterfs
> defaults,_netdev,backupvolfile-server=prd-sta-sto02 0 0
>
>  I expect client to use sto01 and not sto02 as it's available.
>
>
> Hi Mathieu,
> When you do lookups (`ls` etc), they are sent to both bricks of the
> replica. If you write to a file, the write is also sent to both bricks.
> This is how it works. Only reads are served from the local brick.
> -Ravi
>
>
>
>  If I add a static route to break connectivity to sto02 and do a "df", I
> have around 30s before it works.
> Then it works ok.
>
>  Questions:
>
>    - How to force node to stick as possible with one specific (local)
>    node ?
>    - How to know where a client is currently connected?
>
> Thanks for your help :)
>
>
>  Cordialement,
> Mathieu CHATEAU
> http://www.lotp.fr
>
> 2015-05-11 7:26 GMT+02:00 Mathieu Chateau <mathieu.chateau at lotp.fr>:
>
>> Hello,
>>
>>  thanks for helping :)
>>
>>  If gluster server is rebooted, any way to make client failback on node
>> after reboot ?
>>
>>  How to know which node is using a client ? I see TCP connection to both
>> node
>>
>>  Regards,
>>
>>  Cordialement,
>> Mathieu CHATEAU
>> http://www.lotp.fr
>>
>> 2015-05-11 7:13 GMT+02:00 Ravishankar N <ravishankar at redhat.com>:
>>
>>>
>>>
>>> On 05/10/2015 08:29 PM, Mathieu Chateau wrote:
>>>
>>> Hello,
>>>
>>>  Short way: Is there any way to define a preferred Gluster server ?
>>>
>>>  Long way:
>>> I have the following setup (version 3.6.3) :
>>>
>>>  Gluster A  <==> VPN <==> Gluster B
>>>
>>>  Volume is replicated between A and B.
>>>
>>>  They are in same datacenter, using a 1Gb/s connection, low latency
>>> (0.5ms)
>>>
>>>  I have gluster clients in lan A & B.
>>>
>>>  When doing a "ls" on big folder (~60k files), both gluster node are
>>> used, and so it need 9mn instead on 1mn if only the local gluster is
>>> reachable.
>>>
>>>
>>>  Lookups (and writes of course) from clients are sent to both  bricks
>>> because AFR uses the result of the lookup to select which brick to read
>>> from if there is a pending heal etc.
>>> If the file is clean on both A and B, then reads are always served from
>>> the local brick. i.e. reads on clients mounted on A will be served from the
>>> brick in A (and likewise for B).
>>>
>>> Hope that helps,
>>> Ravi
>>>
>>>
>>>   It's HA setup, application is present on both side. I would like a
>>> master/master setup, but using only local node as possible.
>>>
>>>
>>>  Regards,
>>> Mathieu CHATEAU
>>> http://www.lotp.fr
>>>
>>>
>>>  _______________________________________________
>>> Gluster-users mailing listGluster-users at gluster.orghttp://www.gluster.org/mailman/listinfo/gluster-users
>>>
>>>
>>>
>>
>
>
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