[gpfsug-discuss] Upgrading kernel on RHEL

Nathan Harper nathan.harper at cfms.org.uk
Tue Nov 29 20:59:45 GMT 2016 

Ah, so an issue with the NSD nodes, as opposed the clients?


> On 29 Nov 2016, at 20:56, Luis Bolinches <luis.bolinches at fi.ibm.com> wrote:
> 
> Its been around in certain cases, some kernel <-> storage combination get hit some not
>  
> Scott referenced it here https://www.ibm.com/developerworks/community/wikis/home?lang=en#!/wiki/General+Parallel+File+System+%28GPFS%29/page/Storage+with+GPFS+on+Linux
>  
> https://access.redhat.com/solutions/2437991
>  
> It happens also on 7.2 and 7.3 ppc64 (not yet on the list of "supported") it does not on 7.1. I can confirm this at least for XIV storage, that it can go up to 1024 only.
>  
> I know the FAQ will get updated about this, at least there is a CMVC that states so.
>  
> Long short, you create a FS, and you see all your paths die and recover and die and receover and ..., one after another. And it never really gets done. Also if you boot from SAN ... well you can figure it out ;)
>  
> 
> --
> Ystävällisin terveisin / Kind regards / Saludos cordiales / Salutations
> 
> Luis Bolinches
> Lab Services
> http://www-03.ibm.com/systems/services/labservices/
> 
> IBM Laajalahdentie 23 (main Entrance) Helsinki, 00330 Finland
> Phone: +358 503112585
> 
> "If you continually give you will continually have." Anonymous
>  
>  
> ----- Original message -----
> From: Nathan Harper <nathan.harper at cfms.org.uk>
> Sent by: gpfsug-discuss-bounces at spectrumscale.org
> To: gpfsug main discussion list <gpfsug-discuss at spectrumscale.org>
> Cc:
> Subject: Re: [gpfsug-discuss] Upgrading kernel on RHEL
> Date: Tue, Nov 29, 2016 10:44 PM
>  
> This is the first I've heard of this max_sectors_kb issue, has it already been discussed on the list? Can you point me to any more info?
> 
>  
> 
>> On 29 Nov 2016, at 19:08, Luis Bolinches <luis.bolinches at fi.ibm.com> wrote:
>>  
>> Seen that one on 6.8 too
>>  
>> teh 4096 does NOT work if storage is XIV then is 1024
>>  
>> 
>> --
>> Ystävällisin terveisin / Kind regards / Saludos cordiales / Salutations
>> 
>> Luis Bolinches
>> Lab Services
>> http://www-03.ibm.com/systems/services/labservices/
>> 
>> IBM Laajalahdentie 23 (main Entrance) Helsinki, 00330 Finland
>> Phone: +358 503112585
>> 
>> "If you continually give you will continually have." Anonymous
>>  
>>  
>> ----- Original message -----
>> From: "Kevin D Johnson" <kevindjo at us.ibm.com>
>> Sent by: gpfsug-discuss-bounces at spectrumscale.org
>> To: gpfsug-discuss at spectrumscale.org
>> Cc: gpfsug-discuss at spectrumscale.org
>> Subject: Re: [gpfsug-discuss] Upgrading kernel on RHEL
>> Date: Tue, Nov 29, 2016 8:48 PM
>>  
>> I have run into the max_sectors_kb issue and creating a file system when moving beyond 3.10.0-327 on RH 7.2 as well.  You either have to reinstall the OS or walk the kernel back to 327 via:
>> 
>> https://access.redhat.com/solutions/186763
>>  
>> Kevin D. Johnson, MBA, MAFM
>> Spectrum Computing, Senior Managing Consultant
>> 
>> IBM Certified Deployment Professional - Spectrum Scale V4.1.1
>> IBM Certified Deployment Professional - Cloud Object Storage V3.8
>> IBM Certified Solution Advisor - Spectrum Computing V1
>>  
>> 720.349.6199 - kevindjo at us.ibm.com
>>  
>>  
>>  
>> ----- Original message -----
>> From: "Luis Bolinches" <luis.bolinches at fi.ibm.com>
>> Sent by: gpfsug-discuss-bounces at spectrumscale.org
>> To: gpfsug-discuss at spectrumscale.org
>> Cc: gpfsug-discuss at spectrumscale.org
>> Subject: Re: [gpfsug-discuss] Upgrading kernel on RHEL
>> Date: Tue, Nov 29, 2016 5:20 AM
>>  
>> My 2 cents
>>  
>> And I am sure different people have different opinions.
>>  
>> New kernels might be problematic.
>>  
>> Now got my fun with RHEL 7.3 kernel and max_sectors_kb for new FS. Is something will come to the FAQ soon. It is already on draft not public.
>>  
>> I guess whatever you do .... get a TEST cluster and do it there first, that is better the best advice I could give.
>>  
>> 
>> --
>> Ystävällisin terveisin / Kind regards / Saludos cordiales / Salutations
>> 
>> Luis Bolinches
>> Lab Services
>> http://www-03.ibm.com/systems/services/labservices/
>> 
>> IBM Laajalahdentie 23 (main Entrance) Helsinki, 00330 Finland
>> Phone: +358 503112585
>> 
>> "If you continually give you will continually have." Anonymous
>>  
>>  
>> ----- Original message -----
>> From: "Sobey, Richard A" <r.sobey at imperial.ac.uk>
>> Sent by: gpfsug-discuss-bounces at spectrumscale.org
>> To: "'gpfsug-discuss at spectrumscale.org'" <gpfsug-discuss at spectrumscale.org>
>> Cc:
>> Subject: [gpfsug-discuss] Upgrading kernel on RHEL
>> Date: Tue, Nov 29, 2016 11:59 AM
>>  
>> All,
>> 
>>  
>> 
>> As a general rule, when updating GPFS to a newer release, would you perform a full OS update at the same time, and/or update the kernel too?
>> 
>>  
>> 
>> Just trying to gauge what other people do in this respect. Personally I’ve always upgraded everything at once – including kernel. Am I looking for trouble?
>> 
>>  
>> 
>> Cheers
>> 
>> Richard
>> 
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