Recent changes to Home

WikiPage Home modified by mike cannon

mike cannon — Wed, 02 Nov 2011 21:49:56 -0000

--- v4 
+++ v5 
@@ -1,13 +1,12 @@
-to build it from linux you do this:
-svn checkout svn://svn.code.sf.net/p/diskperf/code/trunk diskperf-code
-cd diskperf-code
+to build on linux you do this:
+svn checkout svn://svn.code.sf.net/p/diskperf/code/trunk diskperf-code
+cd diskperf-code
 make
 
 to build on solaris:
 svn checkout svn://svn.code.sf.net/p/diskperf/code/trunk diskperf-code
 cd diskperf-code
 cc -m64 -O -o diskperf diskperf.c
-
 
 diskperf argument descriptions:
 -b “buffer size” amount of data per transfer

WikiPage Home modified by mike cannon

mike cannon — Wed, 02 Nov 2011 21:49:15 -0000

--- v3 
+++ v4 
@@ -1,3 +1,14 @@
+to build it from linux you do this:
+svn checkout svn://svn.code.sf.net/p/diskperf/code/trunk diskperf-code
+cd diskperf-code
+make
+
+to build on solaris:
+svn checkout svn://svn.code.sf.net/p/diskperf/code/trunk diskperf-code
+cd diskperf-code
+cc -m64 -O -o diskperf diskperf.c
+
+
 diskperf argument descriptions:
 -b “buffer size” amount of data per transfer
 -c “count” number of transfers

WikiPage Home modified by mike cannon

mike cannon — Wed, 02 Nov 2011 16:54:40 -0000

--- v2 
+++ v3 
@@ -7,12 +7,18 @@
 -r number of files to read per process
 -s each process will utilize a separate directory
 
-Common usage with diskperf:
-diskperf -b 1m -c 10240 -w 1 -d -p 1
-
+Common usage with diskperf for streaming throughput:
+diskperf -b 1m -c 10240 -w 1 -d -p 1
+
 1MB IOs will be transferred 10240 yielding a file size of 10 GB.
 Both diskperf and IOzone yield statistically similar results when run with this command sets:
 diskperf -b 1m -c 10240 -w 1 -d -p 1
 iozone -i 1 -c -e -w -r 1024k -s 10g -t 1 -+n -I
 
 Diskperf is not highly compressible data, and makes interesting tests on systems that do dedupe or with tape drives that auto compress data.
+
+When looking to test metadata operations as such as file creates diskperf can be used as follows:
+time diskperf -w 1000000 -c 0 -p 1
+
+This will create one million 0k files in the current directory.  Increasing the process count to two and with the addition of the -s parameter will cause two processes to create a million files in two separate directories.
+time diskperf -w 1000000 -c 0 -p 2 -s

WikiPage Home modified by mike cannon

mike cannon — Wed, 02 Nov 2011 16:34:46 -0000

--- v1 
+++ v2 
@@ -1,5 +1,18 @@
-Welcome to your wiki!
-
-This is the default page, edit it as you see fit. To add a page simply reference it within brackets, e.g.: [SamplePage].
-
-The wiki uses [Markdown](/p/diskperf/wiki/markdown_syntax/) syntax.
+diskperf argument descriptions:
+-b “buffer size” amount of data per transfer
+-c “count” number of transfers
+-d to force direct io (only supported on some system, default is off.)
+-p number of process, default is 1
+-w number of files to write per process
+-r number of files to read per process
+-s each process will utilize a separate directory
+
+Common usage with diskperf:
+diskperf -b 1m -c 10240 -w 1 -d -p 1
+
+1MB IOs will be transferred 10240 yielding a file size of 10 GB.
+Both diskperf and IOzone yield statistically similar results when run with this command sets:
+diskperf -b 1m -c 10240 -w 1 -d -p 1
+iozone -i 1 -c -e -w -r 1024k -s 10g -t 1 -+n -I
+
+Diskperf is not highly compressible data, and makes interesting tests on systems that do dedupe or with tape drives that auto compress data.

WikiPage Home modified by mike cannon

mike cannon — Wed, 02 Nov 2011 15:42:06 -0000

Welcome to your wiki! This is the default page, edit it as you see fit. To add a page simply reference it within brackets, e.g.: [SamplePage]. The wiki uses [Markdown](/p/diskperf/wiki/markdown_syntax/) syntax.