Yes, stopping the cluster for a couple of weeks ~February is not a problem.
Jacek
> On Jan 15, 2016, at 1:55 AM, Fabrice Jammes <[log in to unmask]> wrote:
>
> Hi Yvan,
>
> Thanks again for CC-IN2P3 excellent support on this cluster (which is currently the biggest Qserv cluster in the world by an order of magnitude :-))
>
> On my side, I think CentOS 7.x would be an excellent choice because it is supported by Docker install procedure.
> Jacek, do you agree if CC-IN2P3 stop cluster, around February, for one ot two weeks in order to upgrade to CentOS 7 before our 200TB tests?
>
> If yes, CC-IN2P3 enginner could start upgrading ccqserv124 to CentOS 7 next week, in order to train for total cluster upgrade.
>
> Thanks in advance for your answer.
>
> Fabrice
>
> On 01/14/2016 10:22 PM, Yvan Calas wrote:
>>> On 14 Jan 2016, at 11:17, Fabrice Jammes <[log in to unmask]> wrote:
>>>
>>>>> So could you please try to upgrade kernel on ccqserv{125...149}, and then John could try to launch again its code and see if it still produce kernel panic.
>>>> Just to be sure... Kernel upgrade on ccqserv{100..124} or on ccqserv{125..149}?
>>>>
>>>>
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>>> Please upgrade kernel on:
>>>
>>> ccqserv{125..149}
>> This afternoon, we tried to upgrade the kernel on ccqserv149 first (kernel EPEL -> kernel-ml: "mainline stable" branch of The Linux Kernel Archives):
>>
>> $ uname -r
>> 4.4.0-1.el7.elrepo.x86_64
>>
>> Unfortunately it didn't work as expected because of some openafs issue (ELRepo no longer maintains openafs-related packages). We (mainly Ahmed, one of our sysadmins) will try to investigate further. However, if it still doesn't work, we may decide to reinstall this node with CentOS 7.
>>
>> More news asap,
>>
>> Yvan
>>
>>
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