Packing the same data more than once sometimes results in a larger file
than you would have if it only had been packed once.
Jim
Alain Benveniste wrote:
Ce message est au format MIME. Comme votre programme de lecture de courriers ne comprend pas
ce format, il se peut que
-Original Message-
From: The IBM z/VM Operating System
[mailto:ib...@listserv.uark.edu] On Behalf Of Tom Duerbusch
Sent: Friday, May 01, 2009 10:21 AM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Re: Packing Methods
The reason to turn off 3590E hardware compression, is if you
having
12:30 PM
-Original Message-
From: The IBM z/VM Operating System
[mailto:ib...@listserv.uark.edu] On Behalf Of Tom Duerbusch
Sent: Friday, May 01, 2009 10:21 AM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Re: Packing Methods
The reason to turn off 3590E hardware compression, is if you
The reason to turn off 3590E hardware compression, is if you having
problems feeding the beast. You get faster backups if you can keep
the drive going.
An IBM 3590E writes to tape at 14 MBs. If hardware compression is
turned on and you are getting 3:1 compression, then you have to feed the
Richard,
You have the same questions I had when I started to put in place our DR
solution. We also have 3590E drives and I never tried to remove the hard
drive default compaction. I don¹t see a reason for that. Now choosing
software compaction is a must if you have enough cpu to do the work for
z/VM Operating System [mailto:ib...@listserv.uark.edu] On Behalf
Of Alain Benveniste
Sent: Thursday, April 30, 2009 4:25 AM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Re: Packing Methods
Richard,
You have the same questions I had when I started to put in place our DR
solution. We also have 3590E
If your main concern is impact on users and you have a speedy link between
the sites, then by all means use hardware compression only. If your link is
slow or there is other traffic on it, you may consider software compression
and then muzzle the backup application using priorities etc. I
