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