Re: Changer policy
I use tpchanger chg-disk# VTAPES the tape-changer glue script # This changer script is based on a directory structure like: # slot_root_dir -| # |- info # |- data - slot1 # |- slot1 # |- slot2 # |- ... # |- slotn # where 'slot_root_dir' is the tapedev 'file:xxx' parameter and # 'n' is the tapecycle parameter. # # To use this driver, just put the line 'tpchanger chg-disk' in # your amanda.conf. Gerrit
Re: Changer policy
Hi Gerrit, I use tpchanger chg-disk# VTAPES the tape-changer glue script So do I, for the n first vtapes in the first disk, but chg-disk cannot access the vtapes n+1 t0 2n that are on the second disk: this second disk should be manually loaded first. Olivier
Re: Changer policy
On Thu, Aug 21, 2008 at 8:55 AM, Olivier Nicole [EMAIL PROTECTED] wrote: Does it exist a changer that allow the manual change of a caroussel, so I don't have to redesign everything from scratch? (I mean the Amanda phylosophy, not the exact way to load/eject a caroussel or mout/unmout a disk). I *think* that chg-manual will do what you want, perhaps with a little bit of tweaking to recognize when vtapes are on the same disk. This is a fairly common use-case, so if you're working against 2.6.0, I'm sure a lot of other people would like to see your solution. Dustin -- Storage Software Engineer http://www.zmanda.com
Re: Changer policy
On Thu, Aug 21, 2008 at 07:55:26PM +0700, Olivier Nicole wrote: Hi, I have a brand new Amanda server, that uses virtual tapes. My virtual tapes are set on external hard disks, but I can only physically connect one disk at a time. I uses runtapes 5. So I can end up in a situation where I have 2 vtapes left one a disk, and where I must change disk in the middle of a dump. I beleive this is close to the situation of a tape caroussel, where one wants to reload the caroussel in the middle of a dump. I'd like to know if the model bellow makes sense with Amanda, does it break the general idea or not? Will it work if I write a changer that would wait for manual change of the disk? The dumps would finish to the holding disks and the taper would wait for manual change of the disk before finishing to write on the tape (wait would be several hours). I see that amcheck physically tries to access the tapes, so in a situation with 2 tapes left on a disk and 3 tapes from the new disk, amcheck would request the user tou change disk, that is not really necessary, is there any other command that is likely to access the changer (beside the amdump/amflush and restore). My setup is probably similar except I have 2 usb drives plus some space on the hard disk for my vtapes. However I don't typically unplug the external drives. My changer slots are actually symbolic links to the actual location of the mounted vtapes. If a drive were off line (or more frequently in my case too full) amanda just looks for the next available vtape. If none are available it finishes to the holding disk like you suggest. I wonder if an modified changer script is even needed. If you have the auto flush parameter set in amanda.conf, the next time you run amdump it will check the holding disk and begin flushing the old dumps immediately. I think this begins even while estimates are being done. So just bring online the other drive and let amanda do its thing next amdump. Is there a command to get the label of the tape loaded in the tape device? From memory, amtape ... show or current. Does it exist a changer that allow the manual change of a caroussel, so I don't have to redesign everything from scratch? (I mean the Amanda phylosophy, not the exact way to load/eject a caroussel or mout/unmout a disk). I was running an HP SureStore DDS3 changer for a long while. It uses a 6 tape magazine and I adapted to its size by dumping weekdays and Sunday night for the weekend. But I had 7 magazines of tapes and never noted a changer script that automatically or manually tried to deal with magazines/caroussels. -- Jon H. LaBadie [EMAIL PROTECTED] JG Computing 12027 Creekbend Drive (703) 787-0884 Reston, VA 20194 (703) 787-0922 (fax)
Re: Changer policy
Oliver, The simple answer is to use chg-manual, which waits for operator intervention. You will have to adjust a symlink as well as the disk connections. If it is possible to script the disk switch, you should be able to write a changer script that does what you want. --Ian On Thursday 21 August 2008 08:55:26 Olivier Nicole wrote: Hi, I have a brand new Amanda server, that uses virtual tapes. My virtual tapes are set on external hard disks, but I can only physically connect one disk at a time. I uses runtapes 5. So I can end up in a situation where I have 2 vtapes left one a disk, and where I must change disk in the middle of a dump. I beleive this is close to the situation of a tape caroussel, where one wants to reload the caroussel in the middle of a dump. I'd like to know if the model bellow makes sense with Amanda, does it break the general idea or not? Will it work if I write a changer that would wait for manual change of the disk? The dumps would finish to the holding disks and the taper would wait for manual change of the disk before finishing to write on the tape (wait would be several hours). I see that amcheck physically tries to access the tapes, so in a situation with 2 tapes left on a disk and 3 tapes from the new disk, amcheck would request the user tou change disk, that is not really necessary, is there any other command that is likely to access the changer (beside the amdump/amflush and restore). Is there a command to get the label of the tape loaded in the tape device? Does it exist a changer that allow the manual change of a caroussel, so I don't have to redesign everything from scratch? (I mean the Amanda phylosophy, not the exact way to load/eject a caroussel or mout/unmout a disk). Best regards, Olivier -- Wiki for Amanda documentation: http://wiki.zmanda.com/
