NDMPSTAT(8) Maintenance Commands and Procedures NDMPSTAT(8)
NAME
ndmpstat - show NDMP backup progress statistics
SYNOPSIS
ndmpstat [
tapes] [
interval [
count]]
DESCRIPTION
The
ndmpstat utility reports Network Data Management Protocol (NDMP)
statistics, among which are NDMP worker threads, disk IO, tape IO,
files operation, performance, and backup activity.
ndmpstat reports the aggregate statistics for all tapes and disks. In
order to obtain statistics for specific tape devices, the tape device
name should be passed as argument to the utility.
When invoked,
ndmpstat begins its display with a one-line summary of
the NDMP daemon activity since the NDMP service was invoked.
Display Fields
The fields in
ndmpstat output are described as follows:
wthr Report the number of worker threads in each of the four
following states:
r the number of worker threads running
w the number of blocked worker threads that are waiting for
resources such as I/O and paging
b the number of backup operations currently running
r the number of restore operations currently running
file Report on usage of filesystem.
rd the number of files being read
wr the number of files being written
disk Report the number of disk operations per interval.
rd the number of disk blocks being read
wr the number of disk blocks being written
tape Report the number of tape operations per interval. There are
slots for up to four tapes, labeled with a single number. The
number indicates the name of the device under
/dev/rmt.
rd the number of tape blocks being read
wr the number of tape blocks being written
bytes Report the number of bytes transferred. This is the aggregate
value of both tape and disk devices. The number is in kilobytes.
rd the number of kilobytes being read
wr the number of kilobytes being written
perf Displays a rough estimate of performance of the backup/restore
operation in megabytes per second.
bk backup performance
rs restore performance
prcnt Display the comparative usage of resources, in percent.
dsk disk I/O time
tpe tape I/O time
otr other time (memory or idle)
See
EXAMPLES.
OPERANDS
The following operands are supported:
count Specifies the number of times that the statistics display
is repeated.
tape Specifies which tapes are to be given priority in the
output. A command line is limited to a maximum of four
tape devices. A common tape name is
/dev/rmt/n, where
n is an integer.
interval Specifies the number of seconds over which
ndmpstat summarizes activity. The specified interval remains in
effect till the command is terminated.
EXAMPLES
Example 1: Using ndmpstat
The following command displays a summary of NDMP daemon activity at
five-second intervals.
example%
ndmpstat 5 wthr file disk tape bytes perf prcnt
r w b r rd wr rd wr rd wr rd wr bk rs dsk tpe otr
1 0 3 6 50 9 1250 0 32544 4455 42335 3234 5 4 20 40 40
1 0 0 1 1 0 128 0 0 128 64 64 1 0 0 80 20
1 0 0 1 2 0 128 0 0 0 64 0 1 0 80 0 20
1 0 0 1 1 0 128 0 0 0 64 0 1 0 80 0 20
1 0 0 1 3 0 128 0 0 0 64 0 0 0 80 0 20
1 0 0 1 1 0 128 0 0 128 64 64 1 0 0 80 20
^C
example%
ATTRIBUTES
See
attributes(7) for descriptions of the following attributes:
+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Interface Stability | See below |
+--------------------+-----------------+
Invocation is evolving. Human readable output is unstable.
SEE ALSO
attributes(7),
iostat(8),
mpstat(8),
ndmpadm(8),
ndmpd(8)NOTES
Performance numbers are not accurate and are rounded up at the
MB/sec. boundary.
June 21, 2007 NDMPSTAT(8)
