Thanks Ron for the reply

Its actually moot as the back end is XIV behind SVCs.  But the SAN guys
like to allocate standard size luns and my DB luns are all a bit small for
their liking, so if I could get the same multithread effect by allocating
one big lun, with multiple AIX VGs on it, that would be happiness.

Regards

Steve.


On 16 July 2014 13:05, Ron Delaware <ron.delaware AT us.ibm DOT com> wrote:

> Steven,
>
> The logical volumes are not dedicated disks in most cases, which means
> that other applications may be using the same disks at the same time. With
> our new "TSM Server Blueprint" standards, TSM database's over 1TB require
> 16 luns.
>
> You can go to this link to find out more
>
>
> https://www.ibm.com/developerworks/community/wikis/home?lang=en#!/wiki/Tivoli%20Storage%20Manager/page/NEW%20-%20Tivoli%20Storage%20Manager%20Blueprint%20-%20%20Improve%20the%20time-to-value%20of%20your%20deployments
>
>
>
> Best Regards,
>
> _________________________________________________________
> * Ronald C. Delaware*
> IBM Level 2 - IT Plus Certified Specialist – Expert
> IBM Corporation | Tivoli Software
> IBM Certified Solutions Advisor - Tivoli Storage
> IBM Certified Deployment Professional
> Butterfly Solutions Professional
> 916-458-5726 (Office
> 925-457-9221 (cell phone)
>
> email: *ron.delaware AT us.ibm DOT com* <ron.delaware AT us.ibm DOT com>
>
> From:        Steven Harris <steve AT STEVENHARRIS DOT INFO>
> To:        ADSM-L AT vm.marist DOT edu
> Date:        07/15/2014 06:55 PM
> Subject:        [ADSM-L] Lun versus logical volume for DB volumes
> Sent by:        "ADSM: Dist Stor Manager" <ADSM-L AT vm.marist DOT edu>
> ------------------------------
>
>
>
> Hi,
>
> I've specced a design for a new TSM server and as recommended have
> specified multiple luns for the database.  The folklore is that DB2 will
> start one thread per lun so for a big database you use 8 luns and hence get
> 8 threads.
>
> My AIX guy is asking whether I really need 8 luns or will 8 AIX logical
> volumes have the same effect.
>
> Does anyone know or can tell me where to look?
>
> Thanks
>
> Steve.
>
> Steven Harris
> TSM Admin
> Canberra Australia
>
>
>