Re: [gpfsug-discuss] Upgrading kernel on RHEL

Tue, 29 Nov 2016 13:03:13 -0800

Full disclosure
 
in my case I added this udev rule, reboot and be happy (I have no other storage than SAN XIV in this case)
 
 cat /etc/udev/rules.d/54-custom.rules
KERNEL=="sd*",RUN+="/bin/sh -c '/bin/echo 1024 > /sys/block/%k/queue/max_sectors_kb'"
 

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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: Luis Bolinches/Finland/IBM@IBMFI
Sent by: [email protected]
To: [email protected]
Cc: [email protected]
Subject: Re: [gpfsug-discuss] Upgrading kernel on RHEL
Date: Tue, Nov 29, 2016 10:57 PM
 
Its been around in certain cases, some kernel <-> storage combination get hit some not
 
 
 
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 ;)
 

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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 <[email protected]>
Sent by: [email protected]
To: gpfsug main discussion list <[email protected]>
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 <[email protected]> wrote:
 
Seen that one on 6.8 too
 
teh 4096 does NOT work if storage is XIV then is 1024
 

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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" <[email protected]>
Sent by: [email protected]
To: [email protected]
Cc: [email protected]
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:  
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 - [email protected]
 
 
 
----- Original message -----
From: "Luis Bolinches" <[email protected]>
Sent by: [email protected]
To: [email protected]
Cc: [email protected]
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" <[email protected]>
Sent by: [email protected]
To: "'[email protected]'" <[email protected]>
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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Ellei edellä ole toisin mainittu: / Unless stated otherwise above:
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Business ID, Y-tunnus: 0195876-3
Registered in Finland
 
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Ellei edellä ole toisin mainittu: / Unless stated otherwise above:
Oy IBM Finland Ab
PL 265, 00101 Helsinki, Finland
Business ID, Y-tunnus: 0195876-3
Registered in Finland
 
_______________________________________________
gpfsug-discuss mailing list
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Ellei edellä ole toisin mainittu: / Unless stated otherwise above:
Oy IBM Finland Ab
PL 265, 00101 Helsinki, Finland
Business ID, Y-tunnus: 0195876-3
Registered in Finland

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