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Storage Performance
By: David Chisholm (dmchisho@learn.senecac.on.ca)
*'''Read:''' The amount of data that can be read from the storage medium per second.*'''Write:''' The amount of data that can be written to the storage medium per second.*'''Access:''' Time required for a computer to process data from the processor and then retrieve the required data from a storage medium. ===Cost=== Since '''NFS''' and '''iSCSI''' are both network storage solutions they have no cost in themselves, but rely on network storage on a remote server. This price is simply the cost of the drives that will be installed in the remote storage server. A USB connected PATA or SATA drive requires both a hard drive and a '''PATA/SATA''' to '''USB''' interface such as an external drive enclosure. * '''NFS:''' Free (Uses existing storage)* '''iSCSI:''' Free (Uses existing storage)* '''USB PATA:''' ~$100 CAD ===Pictures===http://david-chisholm.no-ip.org/networkdiagram.jpg =Approach= ===How did we conduct our testing?=== *Benchmark using a linux untiliy called '''Bonnie++''' written by Russell Coker.*The Benchmark was run 3 times on each medium, the results were then averaged together.*The command used is as follows:
bonnie++ -d <location> -s 2048 -u root
===What happened while you worked on was the problem? You had multiple iterations -- what happened at each milestone? Did you go down the wrong path and have process we used to start over? What barriers did you encounterchoose our benchmarking solution?===
<tr>
<th>Percentage Increase</th>
<th>CPU Usage</th>
</tr>
<td align="center">0%</td>
<td align="center">24%</td>
</tr>
<tr>
<td align="center">NFS</td>
<td align="center">43,363 KB/s</td>
<td align="center">50%</td>
<td align="center">16%</td>
</tr>
<tr>
<td align="center">iSCSI</td>
<td align="center">9%</td>
<td align="center">30%</td>
</tr>
</table>
<tr>
<th>Percentage Increase</th>
<th>CPU Usage</th>
</tr>
<tr>
<td align="center">PATA</td>
<td align="center">0%</td>
<td align="center">10%</td>
</tr>
<tr>
<td align="center">NFS</td>
<td align="center">51,789 KB/s</td>
<td align="center">99%</td>
<td align="center">85%</td>
</tr>
<tr>
<td align="center">127%</td>
<td align="center">84%</td>
</tr>
</table>
==Access==
<table border="1" cellspacing="1" width="0%">
<tr>
<th></th>
<th>Access (per second)</th>
<th>Percentage Increase</th>
<th>CPU Usage</th>
</tr>
<tr>
<td align="center">PATA</td>
<td align="center">121</td>
<td align="center">0%</td>
<td align="center">0%</td>
</tr>
<tr>
<td align="center">NFS</td>
<td align="center">1201</td>
<td align="center">1000%</td>
<td align="center">35%</td>
</tr>
<tr>
<td align="center">iSCSI</td>
<td align="center">2514</td>
<td align="center">2077%</td>
<td align="center">44%</td>
</tr>
</table>
=Links=
* Access Time - http://en.wikipedia.org/wiki/Access_time
* cDOT iSCSI - http://zenit.senecac.on.ca/wiki/index.php/Fedora_ARM_Secondary_Architecture/iSCSI
* Pictures
**http://www.business-strategy-innovation.com/uploaded_images/Innovation-Process-799858.jpg
**http://david-chisholm.no-ip.org/networkdiagram.jpg
**http://www.paladinretrieval.net/hard%20drive.jpg
**http://david-chisholm.no-ip.org/bonnie.jpg
**http://thumbs.dreamstime.com/thumb_122/1171633495w0G6A0.jpg
**http://exportabel.files.wordpress.com/2009/10/train_wreck_at_montparnasse_1895.jpg