Hi !!
Well this matter has been discussed on numerous occasions on this mailing
list. My first suggestion would be to quickly move on to the TSM 5.1 Ver.
it has a lots of new features incorporated. The following points may be
useful for you to probability convince your management to stay with TSM.
TSM is off-course a market leader in its playing field and 90% of the
fortune 500 companies use TSM to manage their business critical data.
Veritas may be a market leader but their presence is mainly in the
Workgroup environments.

Please consider the following points.

1.Catalog information in TSM is stored in the RDBMS, hence there is no
limit for the number of clients you backup using a single TSM server,
imagine backing up  Millions  files and saving the information on a text
based file..!! restore will take ages...!!
2. Hierarchal Storage Management, Managing the available disk space
efficiently by moving the unused files for the disk to the Magnetic Media
(Cheaper) Storage cost/MB is reduced.
3.Migration of data without depending on the type of media class used, TSM
can migrate data shamelessly between different class of medias.
4.Progressive Incremental backup, no periodic full backups.
5. TSM uses database and recoverylog, which can be mirrored for high
availability which can be used to alternate volume switching.
6.TSM each transaction undergoes a two phase commit, thus ensuring the
perfect backup.
7. Varitas multiplexing is good for backup but what about the restore,
restore time is considerably increased due to the splitting of the data.
8. TSM has the checkpoint for restartable restores, you can restart the
failed restores form the point of failure.
9. Check on the versioning capabilities of Veritas, TSM provided a very
useful versioning tool to control the number of versions for a particular
file.
10.TSM is a Single product, thus there are no hassles of integrating
different modules.
11.TSM is a Desktop to Datacentre scalable product.
12.TSM has number of Client Server communication protocols compared to the
limited number of Veritas.
13. Tape expiry is at save set level, that means you cannot treat different
files differently.
14. Additional modules for Mobile backup, TSM the modules is built-in.

Want more please feel free to contact.

Best Regards
Prashant Gadikar





                      Kelvin Tan
                      <ktan@TABLIMITED.        To:       ADSM-L AT VM.MARIST 
DOT EDU
                      COM.AU>                  cc:
                      Sent by: "ADSM:          Subject:  Veritas Enterprise 
Netbackup 4.5
                      Dist Stor
                      Manager"
                      <[email protected]
                      .EDU>


                      10/18/2002 10:59
                      AM
                      Please respond to
                      "ADSM: Dist Stor
                      Manager"





Hi Gurus

At the moment we are using TSM 4.2 but the management is looking at Veritas
Enterprise Netbackup and I have to convince them about staying put with
TSM.  Has anybody move from TSM to Veritas Enterprise Netbackup 4.5 running
on Unix??   Any advantages Veritas has over TSM?  If TSM is that good how
come it does not dominate the backup market?  I have read the report of
Veritas vs TSM but that is on Intel and related to version 3.

Hope somebody can enlightened me.

Thanks.

Kelvin Tan


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