On Jan 16, 2010, at 4:09 AM, Mehdi Salehi wrote:
Hi, What happens if the migration threshold of a storage pool is reached while clients are sending their backups to TSM server? If this happens, the storage pool should read and write simultaneously which impacts backup performance.
What storage pool implementation are you thinking of? The usual Disk type arrival pool has intrinsic overhead in block management, plus logically contiguous blocks likely being rather randomly distributed over the disk area, slowing access. Caching aggravates things. A disk pool should always be sized to accommodate normal daily loading, so migration can be avoided during the client backups period. If its tape type, you have no simultaneous read/write problems. :-) Richard Sims
