in fact what I want is to speed up my backup so i moved my tape charger to the biggest server, now I have a /amanda with 160 GB of free space. I thought that HW compression would also speed up my backup.
thanks again
Frederic Medery System Administrator
LexUM, University of Montreal
Brian Cuttler wrote:
Fred,
Fact The options are not exclusive. You can SW compress on the client or on the server or in the HW having nothing to do with the choice of dump v tar.
Opinion HW compression is great if you are trying to save CPU on the client or server, but doesn't allow you to estimate tape usage as well since amanda doesn't learn from the drive what the compression ratios are for the file systems you are dumping.
er, I should say the DLE - disk list entries, since tar allows you to put to tape (or disk file) things other than "partitions".
YMMV
On Mon, Aug 23, 2004 at 02:52:29PM -0400, Frederic Medery wrote:
Hello, I'm using amanda with IBM 3581 tapechanger, my tapetypes.conf is :
# IBM LTO Ultrium 3581 tape Charger define tapetype IBM-LTO3581 { comment "IBM LTO Ultrium 3581 (Hardware Compression off)" length 100608 mbytes filemark 0 kbytes speed 13120 kps }
I'm gonna use dump instead of tar so I want to enable hardware compression, but I can'y find any in the amanda doc ?
Some Hints ??
Thanks !!!!
-- Frederic Medery System Administrator
LexUM, University of Montreal
--- Brian R Cuttler [EMAIL PROTECTED] Computer Systems Support (v) 518 486-1697 Wadsworth Center (f) 518 473-6384 NYS Department of Health Help Desk 518 473-0773
