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 >>> [EMAIL PROTECTED] 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. ***********************************************************************************
