/2009 22:47
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Re: [ADSM-L] collocation increases tape mounts while backup
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On Dec 17, 2009, at 5:31 PM, Steven Langdale wrote
We are using an IBM3584 and don't use any kind of collocation. We have found
the migration process from diskpool to tape collocates data by node and
therefore already does a decent job of grouping node data together.
The only time you may see better performance with collocation is with a
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[ADSM-L] collocation increases tape mounts while backup
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We are using an IBM3584 and don't use any kind of collocation. We have
found the migration process from diskpool to tape collocates
On Dec 17, 2009, at 5:31 PM, Steven Langdale wrote:
In that case you must be using collocation (albeit by accident).
Not really... Remember that, within Migpr, migration operates
serially by node, and thus you get a certain amount of same-node data
clumped together on sequential media.
Depending on how you set up your collocation (File Systems, Server or Server
Group). If you chose collocation by file system then you would mount a tape
for each file sys, if you set by server then a mount per server etc ...
Hope that helps.
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From: ADSM: Dist Stor Manager [mailto:ads...@vm.marist.edu] On Behalf Of
gardenia28
Sent: Tuesday, November 24, 2009 12:37 AM
To: ADSM-L@VM.MARIST.EDU
Subject: [ADSM-L] collocation increases tape mounts while backup
Hi,
I find by applying collocation concept, the no.of tape mount increases
while
I am not sure if collocating a copy pool is beneficial. It seems like the
copy pool as a disaster recovery pool would be ideal to collocate, but
if you send off tapes every day you end up with a fragmented set of
tapes for each collocation unit anyway. To clean that up would require
bringing
: ADSM: Dist Stor Manager [mailto:ads...@vm.marist.edu] On Behalf Of
David E Ehresman
Sent: Tuesday, November 24, 2009 11:35 AM
To: ADSM-L@VM.MARIST.EDU
Subject: Re: [ADSM-L] collocation increases tape mounts while backup
I am not sure if collocating a copy pool is beneficial. It seems like
Hi,
I find by applying collocation concept, the no.of tape mount increases while
taking backup...
Could anyone justify it or explain me why it is so?
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|This was sent by subhashinipanchaksha...@gmail.com via Backup Central.
The benefit of collocation is in restore time, because tape mounts will be
reduces for restoring each client. If there are not enough tape drives
defined in TSM server, more tape mount during backup is natural.
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