We initially had a single copypool for multiple storage pools:
Storage pools for WINNT, AIX,, NT archives, various AIX Archives,
SYSBACKS.
However, from reading on the list and considering if we had a fire
where the primary pool was, I thought recovery considerations in the
absence of the primary pool data required that the copypool be organized
for faster recovery. So I have broken the copypool into AIX backups, AIX
archives (including SYSBACKS, NT backups and NT archives. I haven't
noticed an overall increase in reclamations, and the archive copypool is
rather static since the files in that copypool do not retire that
often.
>>> Steve_Harris AT HEALTH.QLD.GOV DOT AU 08/04/03 06:41PM >>>
FWIW
I've got three pools on 3590E drives and a mix of J and K tapes
(20/40GB raw)
One is for large backups from our SAP system (150GB raw each, about
55GB compressed at the drives). Because of their size reclamation is
unproductive in this pool.
One is for log term (> 6 months) archives. Most of this is the monthly
archives that management insists we do and are kept for 400 days, but
some of it is "retain forever". The data on these tapes tends to expire
all at once so that reclamation is quite efficient when run infrequently
- once a month or so.
One is for the rest. I try to let as much data expire as possible. I
only run reclaims on this pool once per week and set the reclaim
percentage at 80%, because the most efficient reclaim is the one you
don't do. Average tape utilization on full tapes in this pool is about
47% at the moment.
So, the best mix depends not on the source of your data, but on its
expiry characteristics. In general a single pool works well, but where
there are specific cases it can be wise to split them out.
HTH
Steve Harris
AIX and TSM Admin
Queensland Health, Brisbane Australia
>>> znoriega AT ADNOC DOT COM 04/08/2003 19:28:05 >>>
Hi to all,
What is the best practice of using copy storage pool for offsite tapes?
In
our site, we used different copy storage pools for archive, backup and
tdp
backups, but it too expensive in terms of media used. Space
reclamation
also takes all the drives if they are running on the same. Can I use
one
copy storage pool for all? Any help from you is really appreciated.
Thanks
Zosimo Noriega
***********************************************************************************
This email, including any attachments sent with it, is confidential and
for the sole use of the intended recipients(s). This confidentiality is
not waived or lost, if you receive it and you are not the intended
recipient(s), or if it is transmitted/received in error.
Any unauthorised use, alteration, disclosure, distribution or review of
this email is prohibited. It may be subject to a statutory duty of
confidentiality if it relates to health service matters.
If you are not the intended recipients(s), or if you have received this
e-mail in error, you are asked to immediately notify the sender by
telephone or by return e-mail. You should also delete this e-mail
message and destroy any hard copies produced.
***********************************************************************************
|
