Nick, Amanda does not, as far as I know, allow backups to write to multiple drives concurrently. It can switch tape in a jukebox and it can swap to a second drive unit when the first is full, but concurrent writing isn't a feature I'm aware of.
At my site I've done something that I believe is similar to what Joshua has done. I have an amanda server with two amanda configs, to avoid conficts, because they run at the same time, and because I wanted to avoid rebuilding binaries with non-standard sockets, I run one where all DLE are local to the server and one where the amanda-clients are all not-on-the-server. Within each config amanda does the scheduling but I'm able to make rapid use of two drives concurrently. FYI, these are LTO drives in 9 slot jukeboxes. On Sat, Apr 09, 2005 at 03:13:54PM -0500, Nick Jones wrote: > Wouldn't it still be more efficient to let AMANDA's planner take care of > which backups go to which drives and at what times? > > > -- > Nick > -----Original Message----- > From: Joshua Baker-LePain [mailto:[EMAIL PROTECTED] > Sent: Saturday, April 09, 2005 3:06 PM > To: Nick Jones > Cc: amanda-users@amanda.org > Subject: RE: Large Amanda installations > > On Sat, 9 Apr 2005 at 9:15am, Nick Jones wrote > > > As it stands (and as far as I know) the only way to tape to multiple > > drives simultaneously is to use "juke" in conjunction with AMANDA. > > Native support for a multi-slot and multi-drive changer would be nice. > Thanks. > > That's not exactly true. I use both drives in my changer simply by running > two configs simultaneously. To some extent, it's just an added level of > parallelization. When I had only one drive and was using 'runtapes=2', the > backups sometimes ran well into the day. With two drives, two configs, and > runtapes=1, they're always done in the early AM. > > As to the original question, I've got ~4.8TB of used space over 4 servers > (out of ~5.2GB formatted space), and back it up using a 2 drive, 19 slot > AIT3 changer. With a new 6TB server arriving Monday, I'm looking hard at > LTO3 changers... > > -- > Joshua Baker-LePain > Department of Biomedical Engineering > Duke University > > --- 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
