This is out of pure curiosity.
DB 11.2.0.3 EE on OEL 5.6 (64bit) + Adv. Compression
TSM for MML
Both disk and sbt_tape are configured for compressed backupsets
compression algorithm is configured for 'HIGH'
If I backup to disk, it takes 1.5hrs and produces a 10GB backup piece.
If I backup to tape, it takes 5hrs and produces a 27GB backup piece.
Watching "top", it seems like 1 core runs @ 100% with most of that (>90%) being "user" (ie not I/O bound or wait)
(backing up the 10GB backup piece to tape takes <2 min over a 1GigE link)
Has anybody else seen this type of size difference when they do a compressed backup to disk vs tape?
Is this suppose to happen?
Should I be concerned?
Many thanks for any information,
MK