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Re: [ADSM-L] Is TSM for VE 7.1.1.1 pagefile aware? Is it contrained to a single process per datamover? What constitutes a successful backup?
2015-03-02 14:37:03
Hello Steve,
There's no mention of pagefile 'awareness'
in the documentation, so it's safe to say that the backup will consist
of all changed blocks, regardless of what's stored on them. As for
threaded behavior, I've pinned all the cores on my datamover during heavy
parallel backups using deduplication, so while it may only register as
a single process in the Task Manager, it seems clear that TSM is acting
like a multi-threaded application. As for your last point, I don't
know why IBM changed the status codes for VM schedules from 'Failed' to
'Completed' but I suspect it has something to do with VMWare's abysmal
ability to create quiesced snapshots on a consistent basis.
We backup ~500 VMs on a daily basis
and usually have 4-5 failures, all due to quiescing errors. I guess
IBM got tired of customer complaints that their VM backup schedules 'always
failed' and quietly changed the status code to make the product look a
little better.
__________________________
Matthew McGeary
Technical Specialist - Operations
PotashCorp
T: (306) 933-8921
www.potashcorp.com
From:
"Schaub, Steve"
<Steve_Schaub AT BCBST DOT COM>
To:
ADSM-L AT VM.MARIST DOT EDU
Date:
03/02/2015 11:24 AM
Subject:
[ADSM-L] Is
TSM for VE 7.1.1.1 pagefile aware? Is it contrained to a single process
per datamover? What constitutes a successful backup?
Sent by:
"ADSM:
Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
1. Is VE pagefile aware? I.E.
is it smart enough to know not to bother backing up changed blocks from
within the pagefile.sys file?
2. It appears to me that a given datamover only uses
a single Windows process, even for multiple concurrent backups. That
would seem to constrain it to a single core. Can someone confirm/deny?
If it is, does it make sense to define multiple datamovers per "proxy
server" in order to take advantage of multi-core machines?
3. Why do schedules with failed VM backups show "successful"?
02/28/2015 02:37:11 Total number of virtual machines failed: 4
02/28/2015 02:37:11 Total number of virtual machines processed: 375
02/28/2015 02:37:11 Scheduled event 'VE_INCR_N01_BCBST_DM02' completed
successfully.
Thanks,
Steve Schaub
Systems Engineer II, Backup/Recovery
Blue Cross Blue Shield of Tennessee
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