On Sunday 16 November 2003 01:18, Danny Ybarra wrote:
>I'm new to amanda but I read that amanda now spans
>multiple tapes. How do you set that up on a Dell 132T
>LTO Autoloader? I also want to use that feature on a
>regular single HP DAT drive.
>
Amanda can use more than one tape, however it cannot span a single
disklist entry to two or more tapes. Each disklist entry must be
smaller than 1 tape.
I'm watching amanda use 2 tapes here, and just saw it switch to the
next tape. Unforch, the file it failed on was over half a tape, so
it wasted about 1.5 gigs in changing the tapes. Looks like I'll need
to re-arrange that entry into 2 or 3 to make it into smaller pieces.
I'm seeing, in the status reports, that amanda seems to be ignoreing
my dumporder "STSTSTST", as its often been seen to do a 70 meg DLE, a
600Mb DLE, then a 2.1Gb DLE and a 1.1Gb DLE, in that order while
filling up a teeny 4Gb tape which wound up with:
dumped : 12 7721415k 7503717k (102.90%) ( 22.21%)
wait for writing: 8 3018755k 2801057k (107.77%) ( 8.68%)
wait to flush : 0 0k 0k (100.00%) ( 0.00%)
writing to tape : 1 2296810k 2296810k (100.00%) ( 6.61%)
failed to tape : 0 0k 0k ( 0.00%) ( 0.00%)
taped : 3 2405850k 2405850k (100.00%) ( 6.92%)
tape 1 : 3 2405850k 2405850k DailySet1-28
tape 2 : 0 0k 0k DailySet1-01
which says I'll have to run a flush in the morning as its going to EOT
the second tape with quite a bit left in /dumps. 3018755k+2296810k
will be about a 1.6Gb overflow, and my indice saver will fail with
EOT.
Suggested change to planner algorythm: When runtapes is >1, juggle
the order to achieve a best fit within the tapetypes capacity as
entered in amanda.conf, overriding the 'dumporder' specified, setting
up a seperate list for each allowed tape.
And even greater modifcation would be to write that amount of data,
then change tapes even without hitting EOT, thereby saving the time
and wear on the drive it wastes in writing till EOT is encountered
before doing the tape change. In this case it would have saved about
an 1 hr & 9 mins, or used that time to put about another gigabyte of
smaller DLE's on the first tape used tonight.
Just my $0.02. That, and another buck, might get you a cuppa most
places :-)
--
Cheers, Gene
AMD K6-III@500mhz 320M
Athlon1600XP@1400mhz 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.
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