On Monday 17 November 2003 04:32, Paul Bijnens wrote: >Danny Ybarra wrote: >> I found this statement in the WHATS.NEW file. Can you >> explain what it means? Sorry for being such a newbie >> but I really want to start using Amanda. >> >> * MULTIPLE TAPES IN ONE RUN >> [ ... ] > >Funny that I'm always pointing people to read the files in the docs/ >directory, while only now I notice the WHATS.NEW is rather old. >It should have been nice if the items in the file were marked with >a version number for which the item applies. > >Current status (2.4.4p1) is that multiple tapes are fully supported. >Using more tapes is done by using a changer glue script. There are >different changer scripts. Some are for real changers (chg-scsi, >chg-zd-mtx,...). >You can also use a human changer if you only one tape device >(chg-manual). Or you can view multiple tape drives as a changer >with the chg-multi script. >There is even an feature called "RAIT", where you can stripe your >backups simultaneously over multiple tapes, include a redundancy >stripe, just like RAID for disks. > >If you have only one tapedrive and no "human" changer available at > dump time, but you do have a large holdingdisk, you can dump to one > tape at night, keeping the overflow on disk, and flushing it to > tape in the morning. > >May I point you to some new feature to help fill the tapes to 100%: >see "taperalgo" and some explanation to get it to work decently: > >http://marc.theaimsgroup.com/?l=amanda-users&m=106277015010167&w=2 > >(Gene: the above link explains how to avoid the behaviour you're > seeing in your setup.)
Great, Paul. I've now added this to my amanda.conf. Many thanks for the pointer. And since I now have reduced my disk count by one, I reduced the dumpers by one too, which should help serialize things. I do use spindle numbers too, so I doubt the dumper count reduction will slow it down any in actual fact. And I hear it changing to the third tape right now. (slow DDS2 drive ): >From a status report: dumped : 56 11384400k 11193857k (101.70%) ( 92.68%) wait for writing: 38 3014138k 2816212k (107.03%) ( 24.54%) wait to flush : 0 0k 0k (100.00%) ( 0.00%) writing to tape : 1 624620k 624620k (100.00%) ( 5.08%) failed to tape : 0 0k 0k ( 0.00%) ( 0.00%) taped : 17 7745642k 7753025k ( 99.90%) ( 63.05%) tape 1 : 12 3951602k 3958985k DailySet1-03 tape 2 : 5 3794040k 3794040k DailySet1-04 tape 3 : 0 0k 0k DailySet1-05 4 dumpers idle : not-idle So whats left should fit on tape 3. And by tomorrow nights finish, I should be done playing catchup. -- Cheers, Gene AMD [EMAIL PROTECTED] 320M [EMAIL PROTECTED] 512M 99.27% setiathome rank, not too shabby for a WV hillbilly Yahoo.com attornies please note, additions to this message by Gene Heskett are: Copyright 2003 by Maurice Eugene Heskett, all rights reserved.
