Amplot
reads an
amdump
output file that Amanda generates each run (e.g.
amdump.1)
and translates the information into a
picture format that may be used to determine how your installation
is doing and if any parameters need to be changed.
Amplot
also prints out
amdump
lines that it either does not
understand or knows to be warning or error lines
and a summary of the start, end and total time for each backup image.
Amplot
is a shell script that executes an
awk
program
(amplot.awk)
to scan the
amdump
output file.
It then executes a
gnuplot
program
(amplot.g)
to generate the graph.
The
awk
program is written in an enhanced version of awk,
such as GNU awk
(gawk
version 2.15 or later) or
nawk.
During execution,
amplot
generates a few temporary files that
gnuplot
uses.
These files are deleted at the end of execution.
See the
amanda(8)
man page for more details about Amanda.
OPTIONS
-c
Compress
amdump_files
after plotting.
-e
Extend the X (time) axis if needed.
-g
Direct
gnuplot
output directly to the X11 display (default).
-p
Direct postscript output to file
YYYYMMDD.ps
(opposite of
-g).
-l
Generate landscape oriented output.
-t T
Set the right edge of the plot to be
T
hours.
The
amdump_files
may be in various compressed formats
(compress,
gzip,
pact,
compact).
INTERPRETATION
The figure is divided into a number of regions.
There are titles on the top that show important statistical information
about the configuration and from this execution of
amdump.
In the figure, the X axis is time, with 0 being the moment
amdump
was started.
The Y axis is divided into 5 regions:
QUEUES:
How many backups have not been started,
how many are waiting on space in the holding disk
and how many have been transferred successfully to tape.
%BANDWIDTH:
Percentage of allowed network bandwidth in use.
HOLDING DISK:
The higher line depicts space allocated on the holding disk to
backups in progress and completed backups waiting to be written to tape.
The lower line depicts the fraction of the holding disk containing completed
backups waiting to be written to tape including the file currently being
written to tape.
The scale is percentage of the holding disk.
TAPE:
Tape drive usage.
%DUMPERS:
Percentage of active dumpers.
The idle period at the left of the graph is time
amdump
is asking the machines how much data they are going to dump.
This process can take a while if hosts are down
or it takes them a long time to generate estimates.
AUTHOR
Olafur Gudmundsson ogud@tis.com
Trusted Information Systems
formerly at University of Maryland, College Park
BUGS
Reports lines it does not recognize, mainly error cases but some are
legitimate lines the program needs to be taught about.
