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@(#)README 1.6 89/07/07 Legato Systems, Inc.
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This directory contains the source for the nhfsstone (pronounced
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n-f-s-stone, the "h" is silent) NFS load generating program. This
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version of the program can only be compiled on 4.x BSD based UNIX
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nhfsstone is used on an NFS client to generate an artificial load
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with a particular mix of NFS operations. It reports the average
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response time of the server in milliseconds per call and the load in
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calls per second. The program adjusts its calling patterns based on
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the client's kernel NFS statistics and the elapsed time. Load can be
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generated over a given time or number of NFS calls. See the "nhfsstone.1"
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manual page for more details.
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The files in this directory are:
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DISCLAIMER legal requirements
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Makefile Makefile used to build nhfsstone
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nhfsstone.c source file
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nhfsstone.1 manual page
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nhfsrun shell script to run nhfsstone over multiple loads
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nhfsnums shell script to convert nhfsrun output to plot(5)
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nhfsgraph shell script to create a graph from nhfsnums output
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The file "nhfsstone.1" is a manual page that describes how to use the
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nhfsstone program. To look at it type "nroff -man nhfsstone.1".
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To build an executable type "make nhfsstone". To install it, become
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super-user and then type "make install". This will strip the
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executable, set the group to "kmem" and set the setgid bit. If your
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site requires different installation of programs that read /dev/kmem
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you may have to use different ownership or permissions. Make install
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will also set the execute bits on the shell scripts nhfsrun, nhfsnums
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To run an nhfsstone test, create a parent test directory on a filesystem
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that is NFS mounted, cd to that directory and type "nhfsstone". This will
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do a run with the default settings, load = 30 calls/sec, 5000 calls,
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If you want to spread the load across several server disks, first
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figure out on the server which disk partitions are exported as which
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filesystems. If you don't already have more than one of these
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filesystems mounted on your test client you can mount them in temporary
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locations, like /mnt. Create test directories on these filesystems so
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that the load will be distributed according to the simulation that you
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want to run (for example, you might put 4 test directories on the
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filesystem where the diskless client's root and swap live, and 2 on the
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home directories filesystem, and one on the executables filesystem).
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Now create a parent test directory cd to it, and make symbolic links
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with the names testdir0, testdir1, ... testdir6, that point to the
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real test directories. Finally, run nhfsstone from the parent test
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If you are doing the test from a diskless machine, putting half of the
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test directories in /tmp or /usr/tmp and running the test from your
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home directory will simulate real diskless load patterns fairly well.
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To do a run over multiple load levels, edit the shell script "nhfsrun" and
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set the shell variables "START", "END", and "INCR" to be the correct
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starting and ending loads, and load increment. The script will iterate
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from START to END with an increment of INCR, run nhfsstone at each
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load level, and put the output in the file "run.out". The output file
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name can be changed by editing the nhfsrun script and changing the
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"OUTFILE" variable or by passing a file name suffix on the command line:
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This produces the output file "run.xysd".
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The script "nhfsnums" takes the output from nhfsrun and converts it
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into plot(5) format so that it can be graphed using graph(1) and other
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tools. It takes its input either from files given on the command line
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nhfsnums [numsfile] ...
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If file names are given, the suffix of each name (the part after the
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".") is used as the line label for the set of numbers produced (see
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"nhfsgraph" takes the output from nhfsnums and passes it to graph(1)
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with the right arguments to produce PostScript output for a labeled
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graph. The nhfsgraph script can be used as a filter:
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nhfsnums run.* | nhfsgraph | lpr
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This program is provided free of charge to anyone who wants it provided
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certain conditions are met (see DISCLAIMER file for more details).
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If you would like to receive regular information and bug fixes please
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send your name, and both your Email and U.S. mail addresses to:
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Palo Alto, California 94306
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nhfsstone-request@legato.com or uunet!legato.com!nhfsstone-request
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and we will add your name to the nhfsstone mailing list. Comments and bug
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reports should be sent to:
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nhfsstone@legato.com or uunet!legato.com!nhfsstone
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utils/nhfsstone/README
