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NAME
       nfsometer - NFS performance measurement tool

SYNOPSIS
       nfsometer [options] [mode] [[<server:path>] [workloads...]]

DESCRIPTION
       nfsometer  is  a  performance  measurement  framework  for running workloads and reporting
       results across NFS protocol versions, NFS options and Linux NFS client implementations

MODES
       Basic usage (no mode specified):

	nfsometer <server:path> [workloads...]

	 This will fetch needed files, run traces, and generate reports,
	 same as running the the 'fetch', 'trace' and 'report' stages.

       Advanced usage (specify modes):

	nfsometer list

	   List the contents of the results directory.

	nfsometer workloads

	   List available and unavailable workloads.

	nfsometer notes

	   Edit the notes file of the results directory. These notes will
	   be displayed in report headers.

	nfsometer loadgen <server:path> <workload>

	   Run in loadgen mode: don't record any stats, just loop over
	   <workload> against <server:path>.  Only one -o option is allowed.
	   Use the -n option to run multuple instances of the loadgen workload.
	   When running more than one instance, the intial start times are
	   staggered.

	nfsometer fetch [workloads...]

	   Fetch all needed files for the specified workload(s).  If no
	   workloads are specified, all workloads are fetched.
	   Fetched files are only downloaded once and are cached for
	   future runs.

	nfsometer trace <server:path> [workloads...]

	   Run traces against <server:path>.  The traces run will be:
	   (options + always options + tags) X (workloads) X (num runs)
	   This will only run traces that don't already exist in the results
	   directory.

	nfsometer report

	   Generate all reports available from the results directory.

	nfsometer example

	   Show examples from man page

OPTIONS
	-r <dir>, --resultdir=<dir>
	    The directory used to save results.  default: '/home/dros/nfsometer_results'

	-o <mount.nfs options>, --options=<mount.nfs options>
	    Mount options to iterate through.  This option may	be  used  multiple  times.   Each
	    mount option must have a version specified.

	-a <mount.nfs options>, --always-options=<mount.nfs options>
	    Options added to every trace.  This option may be used multiple times.

	-t <tags>, --tag=<tags>
	    Tag all new traces with 'tags'.  This option may be used multiple times.

	-n <num runs>, --num-runs=<num runs>
	    Number of runs for each trace of <options> X <tags> X <workloads> default: 1

	--serial-graphs
	    Generate  graphs  inline  while  generating  reports.   Useful for debugging graphing
	    issues.

	--rand
	    Randomize the order of traces

	-h, --help
	    Show the help message

EXAMPLES
       Example 1: See what workloads are available

	 $ nfsometer workloads

	 This command lists available workloads and will tell you why
	 workloads are unavailable (if any exist).

       Example 2: Compare cthon, averaged over 3 runs,
		  across nfs protocol versions

	  nfsometer -n 3 server:/export cthon

	 This example uses the default for -o: "-o v3 -o v4 -o v4.1".
	 To see the results, open results/index.html in a web browser.

       Example 3: Compare cthon, averaged over 3 runs,
		  between v3 and v4.0 only

	 nfsometer -n 3 -o v3 -o v4 server:/export cthon

	 This example specifies v3 and v4 only.
	 To see the results, open results/index.html in a web browser.

       Example 4: Compare two kernels running iozone workload, averaged
		  over 2 runs, across all nfs protocol versions

	 nfsometer can compare two (or more) kernel versions, but
	 has no way of building, installing or booting new kernels.
	 It's up to the user to install new kernels.
	 In order for these kernels to be differentiated, 'uname -a'
	 must be different.

	  1) boot into kernel #1

	  2) nfsometer -n 2 server:/export iozone

	  3) boot into kernel #2

	  4) nfsometer -n 2 server:/export iozone

	  5) open results/index.html in a web browser

	 To see the results, open results/index.html in a web browser.

       Example 5: Using tags

	 Tags (the -t option) can be used to mark nfsometer runs as
	 occurring with some configuration not captured by mount options
	 or detectable tags, such as different sysctl settings (client side),
	 different server side options, or different network conditions.

	 1) set server value foo to 2.3

	 2) nfsometer -o v4 -o v4.1 -t foo=2.3

	 3) set server value foo to 10

	 4) nfsometer -o v4 -o v4.1 -t foo=10

	 What is passed to -t is entirely up to the user - it will not be
	 interpreted or checked by nfsometer at all, so be careful!

	 To see the results, open results/index.html in a web browser.

       Example 6: Always options

	 The -o flag specifies distinct option sets to run, but sometimes
	 there are options that should be present in each.  Instead of
	 writing each one out, you can use the -a option:

	 nfsometer -o v3 -o v4 -a sec=krb5 server:/export iozone

	 this is equivalent to:

	 nfsometer -o v3,sec=krb5 -o v4,sec=krb5 server:/export iozone

       Example 7: Using the "custom" workload

	 A main use case of nfsometer is the "custom" workload - it allows
	 the user to specify the command that nfsometer is to run.

	 NOTE: the command's cwd (current working directory) is the runroot
	       created on the server.

	 export NFSOMETER_CMD="echo foo > bar"
	 export NFSOMETER_NAME="echo"
	 export NFSOMETER_DESC="Writes 4 bytes to a file"
	 nfsometer server:/export custom

	 This will run 3 traces (v3, v4, v4.1) against server:/export of
	 the command: echo foo > bar.

       Example 8: Using the loadgen mode

	Loadgen runs several instances of a workload without capturing
	traces. The idea is that you use several clients to generate
	load, then another client to measure performance of a loaded
	server. The "real" run of nfsometer (not loadgen) should mark
	the traces using the -t option.

	1) On client A, run the cthon workload to get a baseline of
	   a server without any load.

	  nfsometer trace server:/export cthon

	2) When that's done, start loadgen on client B:

	  nfsometer -n 10 loadgen server:/export dd_100m_1k

	   This runs 10 instances of dd_100m_1k workload on server:/export.
	   It can take several minutes to start in an attempt to stagger
	   all the workload instances.

	3) once all instances are started, run the "real" nfsometer
	   trace on client A.  Use the -t option to mark the traces
	   as having run under load conditions:

	  nfsometer -t "10_dd" trace server:/export cthon

	4) Explain how the tests were set up in the result notes.
	   This should be run on client A (which has the traces:

	  nfsometer notes

	5) Now generate the reports:

	  nfsometer report

       Example 8: Long running nfsometer trace

	 The nfsometer.py script currently runs in the foreground.  As
	 such, it will be killed if the tty gets a hangup or the connection
	 to the client is closed.

	 For the time being, nfsometer should be run in a screen
	 session, or run with nohup and the output redirected to a file.

	  1) screen -RD
	  2) nfsometer -n 2 server:/export iozone
	  3) close terminal window (or ^A^D)
	  ...
	  4) reattach later with screen -RD
	  5) once nfsometer.py is done, results will be in results/index.html

SEE ALSO
       mountstats, nfsstats

BUGS
       No known bugs.

AUTHOR
       Weston Andros Adamson (dros@netapp.com)

nfsometer				       1.7					   man(1)
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