Re: LANfree to multiple tape drives concurrently

[Jim Young]

Hi
 
In the case of a simple filesystem backup (BA), set the RESOURCEUTILIZATION 
parameter in the client dsm.opt/sys file to allow for multiple mounts and set 
the MAXIMUM MOUNT POINTS (maxnummp) in the Node config to allow for how many 
drives you want to let them use.
 
I tend to set it like this for my four drive clients.
 
update node NODENAME maxnummp 4
 
Add this to dsm.sys file in the Windows world or dsm.opt for Unix.  
resourceutilization 10  
 
This page explains the setting a littl better than I could as the numbering 
system is just strange.
 
http://publib.boulder.ibm.com/infocenter/tsminfo/v6/index.jsp?topic=%2Fcom.ibm.itsm.perf.doc%2Fr_opt_client_resourceutilization.html
 
Hope that helps
 
Cheers
 
Jim
 
 
Jim Young 
Tivoli Team Leader
Cattles Group IT.
Extension: 22424
Direct Dial: 0845 5438331
Mobile: 07790 035 173
Email: jimyo...@cattles.co.uk 

 ezzo...@gmail.com 26/03/2012 06:31 

The problem is that changes are not gradual. Files are actually monthly
backups coming from other backup software like Acronis, BackupExec and even
native MS SQL backup files (yes, it is weird!) . I don't think journal
could help a lot, because there are not many files, but some large ones.

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Re: LANfree to multiple tape drives concurrently

[Mehdi Salehi]

Thank you

LANfree to multiple tape drives concurrently

[Mehdi Salehi]

Hi,
Can a TSM client (BA or TDP) be configured to use multiple tape drives
concurrently? A filesystem with tens of Terabytes of incremental data
should be backed up which evidently takes lots of hours with a single LTO4
drive. Say there are enough ports/paths/ISLs available to support at least
two parallel backup sessions from the client to the library. The source
disk's read performance is approximately twice the write performance of a
tape drive.

Thank you

Re: LANfree to multiple tape drives concurrently

[Stefan Folkerts]

Yes it can, if it is just one filesystem you will have to manually split it
in the TSM BA configuration but this can also be done.
I am not sure if it is going to be faster than a backup via disk, that will
depend on the size and the amount of the files to be backed up I think.
How many files are there and what is your changerate on the data in amount
of files and TB's?
I am sure you know about the BA journaling feature, that could be a life
saver when you have large amounts of files and you are on a supported
filesystem  platform.


On Sun, Mar 25, 2012 at 4:30 PM, Mehdi Salehi ezzo...@gmail.com wrote:

 Hi,
 Can a TSM client (BA or TDP) be configured to use multiple tape drives
 concurrently? A filesystem with tens of Terabytes of incremental data
 should be backed up which evidently takes lots of hours with a single LTO4
 drive. Say there are enough ports/paths/ISLs available to support at least
 two parallel backup sessions from the client to the library. The source
 disk's read performance is approximately twice the write performance of a
 tape drive.

 Thank you

Re: LANfree to multiple tape drives concurrently

[Mehdi Salehi]

The problem is that changes are not gradual. Files are actually monthly
backups coming from other backup software like Acronis, BackupExec and even
native MS SQL backup files (yes, it is weird!) . I don't think journal
could help a lot, because there are not many files, but some large ones.