I'm attempting to commit 7 TB of text to tape. It's presently stored in
a natively gzip-9 compressed zvol, weighing in at 1.7 TB.
My holding area is 5 TB, and is set to a native gzip-5 compression.
The functional difference between gzip-5 and gzip-9 is not very much:
Level 9 compression has a 4-8
Guy,
Are you also using amanda software compression?
Using compression on the holding disk is probably just a waste of CPU as
the data is compressed once and decompressed once, but if it the only
way it can fit in the holding disk.
If you use amanda software compression, then the data is com
I'd thought for both ZFS and the newer (LTO) tape drives
that HW-compression was determined on a block by block
basic (if enabled) so that expansion of data would not occur.
Granted, this does nothing to help with on CPU usage, but I'd
thought it did save, rather, preserve, storage volume.
On We
