Greetings!
We are using Amanda to backup an NFS-server with roughly 100GB of data
and a DLT IV tape drive. We are now in the process of installing a
dedicated backup server to do the job running Debian Linux. We built
the latest stable Amanda (amanda-2.4.2p2) on it, which seems to be
working fine in our "test" environment. Before we put it to production
use, however, I would like to know whether the size of the "tapebufs"
variable makes a big difference in performance. The server has the
following specs:
800 Mhz Intel PIII
768 Mb RAM
A 36 GB holding disk (we plan to include a 100Gb LVM, once we bring the old
server offline).
The default value "tapebufs 20" = 640Kb seems a bit low. What would you
suggest as a reasonable value. The test configuration is as follows:
####################################################################
#
# Technical specifications for dumps.
#
####################################################################
inparallel 4
netusage 2000 Kbps
dumpcycle 1 week
runspercycle 5
tapecycle 40 tapes
bumpsize 200 Mb
bumpdays 1
bumpmult 4
etimeout 600
dtimeout 1800
ctimeout 30
tapebufs 40
runtapes 1
####################################################################
#
# Tapetype definitions.
#
####################################################################
define tapetype DLT {
comment "DLT IV"
length 20000 mbytes
filemark 2000 kbytes
speed 1536 kbytes
}
Any feedback on these values would be greatly appreciated (hopefully I
have not overlooked to include some important piece of information :-).
Regards,
Lari Huttunen
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| Lari Huttunen | +358 50 338 0759 | http://www.helsinki.fi/~lshuttun |
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