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Full Discussion: Disk Usage - Space Used
Top Forums Shell Programming and Scripting Disk Usage - Space Used Post 302339170 by Festus Hagen on Thursday 30th of July 2009 02:16:44 AM
Old 07-30-2009
Disk Usage - Space Used
Hi all,

FreeBSD7.1 @ sh.

In a backup script I am trying to get the blocks used by the backup once completed.

I am using the function:
Code:
#!/bin/sh
spaceused()
{
 du -d 0 "${1}" | awk -F"[ \t]+" '{ print $1 }
}

to return the blocks used of said directory and contents.

Via. command line it works perf, However in the backup script it returns exactly double the blocks used ...
ie: if there are 459552 blocks used it returns 919104!

If I include "-h" (as below) it does return the correct value.
Code:
#!/bin/sh
spaceused()
{
  du -h -d 0 "${1}" | awk -F"[ \t]+" '{ print $1 }
}

I am calling it like:
Code:
USED=$(spaceused /the/directory)
echo "Blocks used: ${USED}"

This baffles me, Any ideas why this happens.

Ultimately I'm after the bytes used.

Thanks All!

-Enjoy
fh : )_~
 

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LEARN ABOUT OPENSOLARIS

ndmpstat

ndmpstat(1M)						  System Administration Commands					      ndmpstat(1M)

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 indi-
	   cates 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 com-
		   mand 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(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWndmpu 		   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |See below 		   |
       +-----------------------------+-----------------------------+

       Invocation is evolving. Human readable output is unstable.

SEE ALSO

       iostat(1M), mpstat(1M), ndmpd(1M), ndmpadm(1M), attributes(5)

NOTES

       Performance numbers are not accurate and are rounded up at the MB/sec. boundary.

SunOS 5.11							    21 Jun 2007 						      ndmpstat(1M)
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