--On Thursday, October 30, 2003 20:25:26 +0100 Paul Bijnens <[EMAIL PROTECTED]> wrote:
> > Frank Smith wrote: >> If you have plenty of holding disk space and no changer you might >> prefer to not use chg-manual and lie about your tape length. I'm sure >> someone will correct me if I'm wrong (I don't use chg-manual), but I > > :-) > > Never lie to amanda. She hates it. > I use chg-multi (two drives) and tell manda that she can use 3 tapes > (runtapes 3). With these parameters Amanda writes two tapes at night, > and dumps the rest to holdingdisk, which I flush manually on monday > morning on the third tape. (This works also for one drive.) > Note: you have to set the reserve parameter to something else than > the default 100 (= reserve 100% of the holdingdisk for incrementals > when dumping in degraded mode because you ran out of tape) > for this work. > > >> think with chg-manual and a small holdingdisk Amanda pauses the >> backups while it waits for a new tape. If you run it overnight and >> don't change tapes until the morning, part of your backups will be >> run after you change the tape, and you may not want the load on your >> servers and network during the day (plus your filesystems may be more >> active). If you say your tape is much longer than it is, Amanda will >> hit EOT and continue doing the backups to holdingdisk. You can then >> run amflush the next morning after changing tapes without impacting >> any other servers. > > If you lie to Amanda, she might as well think that some DLE would fit > on this exagerated tape, but which physically does not fit on the real > tape length. Also the newer parameter like 'taperalgo largestfit' > would not work. I didn't realize you could set runtapes > 1 without specifying a changer, so your method would make better use of the tapes. If your DLE doesn't fit on a tape, whether you lie about the length or not won't make it fit. But your points are valid and I stand corrected. Frank -- Frank Smith [EMAIL PROTECTED] Systems Administrator Voice: 512-374-4673 Hoover's Online Fax: 512-374-4501
