What tape drive are you emulating? Do you have a current version of the
atape driver on your AIX server? TSM server on AIX uses the atape
driver rather than the TSM drivers.
David Ehresman
>>> Pawlos Gizaw <Pawlos.Gizaw AT SANOFI-AVENTIS DOT COM> 4/30/2009 12:39 PM
>>>
Does anyone use TS7569G with TSM 5.4 running on AIX 5.2. This devices
works fine on HPUX 11 v3 with TSM 5.5 by emulating ATL P300. But we are
trying to test on AIX server the cfgmgr created all the devices files
for the tape drives but not able to get the device file for media
changer. We tried from smitty using Tivoli Storage Manager Devices and
still not able to define it ....TSM Define Methods didnt/couldnt define
any devices !!!!
Thanks
Pawlos
-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf
Of Hart, Charles A
Sent: Thursday, March 19, 2009 10:34 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: [ADSM-L] SV: VTL and Dedup ( TS7569G)
As many say your mileage may vary.... You can positively impact the
Dedupe factor by ...
1) No Client Side Compressions (Compressed files always have unique
Sig)
2) No Client Side Encryption (TSM or OS) - Encrypted Data is always
unique like compressed data.
3) If you have more than one VTL each with its own repository - do your
best to keep like data together (i.e. all Unix / Oracle data to one VTL,
all Windows based Data on 2nd VTL etc .... If would have 200+ Windows
OS's you'll see some Deduping...
4) Of course the Dedup for full DB backups gets much higher (21
Versions of Fulls we avg 15:1) Our challenge has become I/O not space.
5) According to our VTL vendor the RMAN Files per set option should be
@ 1(Files perset allows Oracle to mix data backup streams there by
creating unique data...
Good luck on your venture looks like the TS7569G (IBM Protectier?) same
we are using... The most challenging aspect of any VTL is capacity
planning assuming you have solid retention policies that are followed
...
Regards
Charles
-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf
Of Christian Svensson
Sent: Thursday, March 19, 2009 7:42 AM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: [ADSM-L] SV: VTL and Dedup ( TS7569G)
Hi Martin,
The 1st Backup will probably don't do any major save for you. It always
depend on what kind of data you backup.
What we normally see is saving on Archive Data and TDP Data. Everything
else is most of the time unique data and you will not see any saving.
Dedup is a major saving for other backup software such Legato and NBU
not for TSM because you are using Incremental forever.
Best Regards
Christian Svensson
Cell: +46-70-325 1577
E-mail: Christian.Svensson AT cristie DOT se
Skype: cristie.christian.svensson
________________________________________
Från: ADSM: Dist Stor Manager [ADSM-L AT VM.MARIST DOT EDU] för Sabar
Martin Hasiholan Panggabean [Sabar.Hasiholan AT METRODATA.CO DOT ID]
Skickat: den 19 mars 2009 13:09
Till: ADSM-L AT VM.MARIST DOT EDU
Ämne: VTL and Dedup ( TS7569G)
Hi,
Does anyone here has been implementing or know how Dedup works in TSM
using TS7569G ? Let say I have 100 TB of data and backup to this VTL. On
the 1st attempt of backup / full backup, will this data size decrease on
the VTL
BR,
Martin P
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