1)  Just put it in the preferred slot, according to the NOW site docs for your box.<br>2)  You can use the priority command to set a volume to keep/reuse/never status in PAM  (very nice)<br>3)  Cache Age, is next to...useless.  It used to mean something, back in 5.0 and earlier...but you wanna use <br>
<br><div class="gmail_quote">On Mon, Dec 12, 2011 at 2:39 PM, Fletcher Cocquyt <span dir="ltr">&lt;<a href="mailto:fcocquyt@stanford.edu">fcocquyt@stanford.edu</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div style="word-wrap:break-word">We are taking delivery of a couple flash cache cards (512Gb demo units)  soon.<div>I plan to install them in our standby 3270 cluster then present several cache enabled volumes for various benchmark us cases (Oracle, VMware, Web etc)</div>
<div><br></div><div> Qs:</div><div>1 - how easy/hard is the physical installation? Any gotchas to avoid?</div><div>2 - can I enable / disable caching on the volumes to help define the benefit flash cache is providing?</div>
<div>3 - how do I best monitor the flash cache metrics (I use cacti to graph &quot;Cache Age&quot; currently)..so..</div></div></blockquote><div><br><br>Check the wafl:wafl:read_io_* stats.  That will show WHERE requested blocks are being service from:<br>
 <br>wafl:wafl:read_io_type.cache:95%<br>wafl:wafl:read_io_type.ext_cache:4%<br>wafl:wafl:read_io_type.disk:0%<br><br>Put that together with PAM stats using the stats command to review the status of the ext_cache_obj counters..and you will learn and see a lot.  :)<br>
<br><br><br><br> <br></div><blockquote class="gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div style="word-wrap:break-word"><div><br></div><div>thanks</div><div><br>
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<font face="Lucida Grande"><font size="5"><span style="font-size:11pt">-- <br></span></font></font><font face="Verdana, Helvetica, Arial"><span style="font-size:9pt">Fletcher Cocquyt<br>Principal Engineer<br>Information Resources and Technology (IRT)<br>
Stanford University School of Medicine<br></span></font><span style="font-size:9pt"><font face="Times New Roman"></font></span><font face="Times New Roman"><span></span><span></span><span></span><span></span><span><img src="cid:3400566414_12470137" height="51" width="185"></span><span style="border-collapse:separate;color:rgb(0,0,0);font-family:Helvetica;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:-webkit-auto;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;font-size:medium"><span style="font-family:&#39;Times New Roman&#39;"><span style="border-collapse:separate;color:rgb(0,0,0);font-family:Helvetica;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:-webkit-auto;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;font-size:medium"><span style="font-family:&#39;Times New Roman&#39;"><span style="border-collapse:separate;color:rgb(0,0,0);font-family:Helvetica;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:-webkit-auto;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;font-size:medium"><div>
<span style="font-size:9pt"><font face="Verdana, Helvetica, Arial">Email: <font color="#0000FF"><u><a>fcocquyt@stanford.edu</a></u></font> <br>Phone: <a href="tel:%28650%29%20724-7485" value="+16507247485" target="_blank">(650) 724-7485</a></font></span></div>
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