Hi,
I've never really understood how to make use of the amanda.conf
parameter 'taper-parallel-write'.
I have this tape library with 2 LTO6 tape drives and in the amanda
(3.4.2) config storage section I have set taper-parallel-write=2 along
with defines for the 2 drives in the tpchanger definition:
define device "lto6-drive-0" {
tapedev "tape:/dev/nst0"
device-property "BLOCK_SIZE" "2 mbytes"
}
define device "lto6-drive-1" {
tapedev "tape:/dev/nst1"
device-property "BLOCK_SIZE" "2 mbytes"
}
define changer "neo-t48" {
tpchanger "chg-robot:/dev/changer"
changerfile "/opt/amanda/etc/amanda/neo-t48-state"
property "tape-device" "0=lto6-drive-0" "1=lto6-drive-1"
property "use-slots" "1-48"
property "eject-before-unload" "yes"
property "eject-delay" "20s"
property "unload-delay" "2s"
property "load-poll" "5s poll 20s until 180s"
property "status-interval" "5s"
}
tpchanger "neo-t48"
define storage "bic-storage" {
...
taper-parallel-write=2
tpchanger "neo-t48"
}
Yet I don't see amanda using the 2 drives at the same time. Right now
there is an amdump running with a few dumps lying in the holdddisk but
only taper running...amstatus shows, among other things:
tutor172:/raid/data0 20170213213001 0 2075520m dump done, writing (17206m
done (0.83%)) (1+11:59:48)
tutor172:/raid/data2 20170213213001 0 2091096m dump done, wait for writing
tutor172:/raid/data6 20170213213001 0 2074167m wait for dumping
tutor172:/raid/data7 20170213213001 0 2080428m dumping (35488m done
(1.71%)) (1+11:59:48)
taped : 29 6717716m 4026246m (166.85%) ( 54.41%)
tape 1 : 27 3900014m 3900014m (162.35%) NEO-T48-B00029 (45 parts)
tape 2 : 2 2817702m 2817702m (117.29%) NEO-T48-B00030 (14 parts)
7 dumpers idle : no-diskspace
bic-storage qlen: 1
0: writing (tutor172:/raid/data0)
Maybe there is an interaction with other parameters that nullify its
value. Any hints what I'm doing wrong and I could make that second drive
go?
Thanks,
jf
