any way to commit idle tasks in unix? Post: 302168553

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Top Forums UNIX for Advanced & Expert Users any way to commit idle tasks in unix? Post 302168553 by fabulous2 on Monday 18th of February 2008 11:23:06 PM

02-19-2008

Registered User

Quote:

Originally Posted by System Shock

Question: why would you "commit" idle processes before benchmarking, when in real life whatever you are benchmarking would probably have to run when these idle process run?

Why? Reproducibility of results.

Generally, when you publish benchmarks, you do so running no other programs. You may also try to turn off many background services/processes/whatever.

You do this so that other people running your benchmark on the same hardware are more likely to get the same result as you.

The more stuff besides your actual benchmark that can possibly be running during benchmarking, the less reproducible your results become.

The exception to these comments are when you specifically want to see how your task runs on a loaded system of some kind, but this is less common.

If unix simply lacks the functionality that windows has in this area--fine. Idle tasks suddenly running in the middle of your benchmark is usually a rare event. Its certainly more important that you do obvious simple things like make sure that no other non-idle tasks are running. But having an api for committing idle tasks like windows does certainly is icing on the cake, as it can eliminate the rare possibility.

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LEARN ABOUT DEBIAN

redis-benchmark

REDIS-BENCHMARK(1)					      General Commands Manual						REDIS-BENCHMARK(1)

NAME

       redis-benchmark - Benechmark a Redis instance

SYNOPSIS

       redis-benchmark [-h <host>] [-p <port>] [-c <clients>] [-n <requests]> [-k <boolean>]

DESCRIPTION

       Redis  is a key-value database. It is similar to memcached but the dataset is not volatile and other datatypes (such as lists and sets) are
       natively supported.

OPTIONS

       -h hostname
	      Server hostname (default 127.0.0.1)

       -p hostname
	      Server port (default 6379)

       -c clients
	      Number of parallel connections (default 50)

       -n requests
	      Total number of requests (default 10000)

       -d size
	      Data size of SET/GET value in bytes (default 2)

       -k boolean
	      1=keep alive 0=reconnect (default 1)

       -r keyspacelen
	      Use random keys for SET/GET/INCR, random	values	for  SADD  Using  this	option	the  benchmark	will  get/set  keys  in  the  form
	      mykey_rand000000012456  instead of constant keys, the <keyspacelen> argument determines the max number of values for the random num-
	      ber. For instance if set to 10 only rand000000000000 - rand000000000009 range will be allowed.

       -q     Quiet. Just show query/sec values

       -l     Loop. Run the tests forever

       -I     Idle mode. Just open N idle connections and wait.

       -D     Debug mode. more verbose.

AUTHOR

       redis-benchmark was written by Salvatore Sanfilippo.

       This manual page was written by Chris Lamb <lamby@debian.org> for the Debian project (but may be used by others).

								   June 28, 2010						REDIS-BENCHMARK(1)