<div dir="ltr"><font color="#000099"><font face="tahoma,sans-serif">As Prof. Ganger said your workload is very heavy. In other words, the trace file issue IO request very fast, i.e faster than a real system. You may double check the unit (s, ms) of the time in your traces. Also you can scale requests time with in a parameter in disksim parv file. Please refer to disksim manual for this time scaling parameter.</font></font><div>
<font color="#000099"><font face="tahoma,sans-serif"></font></font><font class="Apple-style-span" color="#000099" face="tahoma, sans-serif"><br></font><div>Alireza Haghdoost<br>Graduate Student <br>Department of Computer Engineering<br>
Sharif University of Technology<br><a href="http://ce.sharif.edu/~haghdoost">http://ce.sharif.edu/~haghdoost</a><br>Phone: (98) (21) 6616 6689<br><br><br>
<br><br><div class="gmail_quote">2011/2/9 Peyman Behzadnia <span dir="ltr"><<a href="mailto:pbehzadn@mail.usf.edu">pbehzadn@mail.usf.edu</a>></span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div>Thanks Greg.</div>
<div> </div>
<div>I appreciate if someone has an idea about parameters&configurations to fix this error? Has anybody had a similiar situatio before?</div>
<div> </div>
<div>Best,</div>
<div>Peyman<br><br></div>
<div class="gmail_quote">---------- Forwarded message ----------<br>From: <b class="gmail_sendername">Greg Ganger</b> <span dir="ltr"><<a href="mailto:ganger@ece.cmu.edu" target="_blank">ganger@ece.cmu.edu</a>></span><br>
Date: Tue, Feb 8, 2011 at 7:42 PM<br>
Subject: Re: [Disksim-users] How to Fix the Saturation Error Due to Heavy Workload!<br>To: Peyman Behzadnia <<a href="mailto:pbehzadn@mail.usf.edu" target="_blank">pbehzadn@mail.usf.edu</a>><br>Cc: Greg Ganger <<a href="mailto:ganger@ece.cmu.edu" target="_blank">ganger@ece.cmu.edu</a>><br>
<br><br><br>No, I'm sorry, but I can't know that. Look at the throughput you see<br>with less intense worklaods to project what it is capable of doing.
<div>
<div></div>
<div><div class="im"><br><br>Good luck,<br><br>Greg<br><br><br>On Tue, 8 Feb 2011, Peyman Behzadnia wrote:<br><br>
</div><blockquote style="border-left:#ccc 1px solid;margin:0px 0px 0px 0.8ex;padding-left:1ex" class="gmail_quote">Dear Greg,<br><br>Thanks for your comment.<br>Can you please let me know how to increase the tolerance of the simulated<br>
system through configurations and parameters? My system includes 10 disks<br>each connected to one bus and one controller and these are connected to one<br>higher level bus, controller and finally the driver.<br><br>Thanks<br>
Peyman<div><div></div><div class="h5"><br><br>On Tue, Feb 8, 2011 at 7:30 PM, Greg Ganger <<a href="mailto:ganger@ece.cmu.edu" target="_blank">ganger@ece.cmu.edu</a>> wrote:<br><br>
<blockquote style="border-left:#ccc 1px solid;margin:0px 0px 0px 0.8ex;padding-left:1ex" class="gmail_quote"><br>The saturation error happens because the workload is heavier than the<br>simualted storage system can handle... not because the simulator itself<br>
can't keep up.<br><br>Good luck,<br><br>Greg<br><br><br><br>On Tue, 8 Feb 2011, Peyman Behzadnia wrote:<br><br>Dear All,<br>
<blockquote style="border-left:#ccc 1px solid;margin:0px 0px 0px 0.8ex;padding-left:1ex" class="gmail_quote"><br>This is Peyman Behzadnia, a PhD student in Computer Science & Engineering.<br>I'm contacting you guys regarding the 'Saturation Error' of the disksim.<br>
<br>I've run a simulation on top of the disksim4 in which i have to feed the<br>simulator with my ascii-format workload with high intensity (100-700<br>requests per second). The problem is that the disksim has constantly given<br>
the saturation error: the simulation stopped due to saturation. I have<br>re-checked all of the detailed parameters in my parameter file and also<br>have<br>tested my workload with the sample parameter files provided by the<br>
disksim.<br>But, it gives the same error. When i decrease the intensity into 1 request<br>per 1-2seconds, it works well.<br>I personally do not believe that such disk simulator can not even handle<br>20<br>requests per second. It might be something about a configuration. I<br>
appreciate if somebody can give me a hint or comment about how to fix this<br>saturation error.<br><br>Best,<br>Peyman<br><br><br></blockquote></blockquote><br></div></div></blockquote></div></div></div><br>
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