Thanks Eric.  Do you have any information other than the following?

Potential enhancements for sequential-access disk pools
- Allow storage pools to span multiple file systems
- Support parallel migration from sequential-access pools
- Minimize fragmentation of file volumes to improve performance
- Exploit direct I/O, where applicable
- Add space trigger for automatic allocation of storage pool space
- Remove mount point limitations
- Candidate for 4Q2004

Will all of these be included in 5.3?

Thanks,

Tim
-----Original Message-----
From: Loon, E.J. van - SPLXM [mailto:Eric-van.Loon AT KLM DOT COM]
Sent: June 18, 2004 4:09 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: Tier'ed library

> Tivoli may be looking at this for futures?
As a matter of fact they will. Version 5.3 (expected 4th. quarter) will
address several disk-only implementation enhancements.
Kindest regards,
Eric van Loon
KLM Royal Dutch Airlines


-----Original Message-----
From: Rushforth, Tim [mailto:TRushforth AT WINNIPEG DOT CA]
Sent: Thursday, June 17, 2004 17:05
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: Tier'ed library


Using sequential-access File volumes with TSM seems to result in a lot of
file level fragmentation.  We are doing a mini-pilot with 25GB File volumes
for the storage pool volumes for some nodes.  These volumes end up very
fragmented (some of the files are in 9000 fragments).

This could have performance implications.

Tivoli may be looking at this for futures?

A VTL may address this.

I did a quick restore test of a node as follows:

36 GB restored
219,170 objects

On fragmented File Volumes:
Time 34.6 minutes
17.7 MB/sec

After defragmenting the file Volumes:
Time 21.9 minutes
27.9 MB/sec

It was not a controlled test as it was run on a production server so there
could have been other things affecting the two tests.

TSM Server 5.2.2.4 on Windows 2003
TSM Client 5.2.2.9 on Windows 2003

Tim Rushforth
City of Winnipeg
-----Original Message-----