On 14/02/17 12:18 PM, Jean-Francois Malouin wrote:
> 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
I suppose it is: taper-parallel-write 2 # there is = sign in amanda.conf
> tpchanger "neo-t48"
> }
You define the storage, but do you tell amanda to use it?
storage "bic-storage"
There is many parameters amanda use t dermine if another tape is required:
tapetype length
flush-threshold-*
taperflush
...
Jean-Louis
>
> 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
