<div>I understand Jeremy and Kris point of view (BTW Kris, astlinux rocks!!)</div>
<div> </div>
<div>However the main question was not aswered (or i didn't get it, did I ?)</div>
<div> </div>
<div>If I use a Disk on Module that has 2million hours MTBF and a Read/Write lifecycle of 2million times, then, How many days/weeks/months/years will take to do 2million read/write cycles?</div>
<div>which leads to my second question.</div>
<div>How do I measure/count the read and writes a normal linux system running asterisk does during a day, so I can extrapolate that in terms of time? Is there an utility?</div>
<div> </div>
<div>Example: if I setup system XYZ with asterisk, then load this magical utility/procedure that counts how many writes the filesystem has done to / or to /,/tmp,/var and after 24 hours the utility/procedure says: 10thousand writes, then, I will do
</div>
<div>10thousand writes a day multiplied by 200 days = 2 millions</div>
<div>Obviously this means I will not use a RAM disk and I want to write to the module everytime</div>
<div> </div>
<div>Then i will assume that the Disk on a Module will die after 200 days. Or am I completely and horribly misunderstanding the "2million Read/Write LifeCyle" advertised by Disk-on-Module companies?</div>
<div> </div>
<div>Example:</div>
<div><a href="http://www.pqi.com.tw/product2.asp?oid=140&cate1=143&PROID=34">http://www.pqi.com.tw/product2.asp?oid=140&cate1=143&PROID=34</a></div>
<div>‧MTBF:2,000,000 Hours<br>‧R/W Cycle:2,000,000 Times<br> </div>
<div>I want to understand if that's what they mean.</div>
<div> </div>
<div>I fully understand that such media will have a longer life cycle if i only read from it and keep writes to a mimimum, for example: writing dialpan changes.</div>
<div> </div>
<div>The whole idea comes from doing a mini itx with no moving parts offering voicemail stored in a disk-on-module and astlinux in a CF and a RAM Disk large enough to do processing on RAM before saving to CF or to disk-on-module when needed.
</div>
<div> </div>
<div>Thanks again for you comments,</div>
<div> </div>
<div> <br><br> </div>
<div><span class="gmail_quote">On 10/6/06, <b class="gmail_sendername">Kristian Kielhofner</b> <<a href="mailto:kris@krisk.org">kris@krisk.org</a>> wrote:</span>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">Kristian Kielhofner wrote:<br>><br>> Erick,<br>><br>> Or.... Just use AstLinux which kind of does what Jeremy described :)
<br>><br>> <a href="http://www.astlinux.org">http://www.astlinux.org</a><br>><br>><br>> P.S. - I am the creator of AstLinux<br>><br>> --<br>> Kristian Kielhofner<br><br> Sorry to reply to my own post, but there seems to have been some
<br>confusion in what I said here. To completely clear it up, Astlinux only<br>writes to flash in these circumstances:<br><br>1) You update the configs.<br><br>2) You update AstLinux.<br><br>3) You are using voicemail and people leave voicemail. (most flash
<br>seems to last "long enough" given typical voicemail usage patterns)<br><br>4) If you have the PERSISTLOG option enabled, I will save syslogs to<br>flash (not RAM - the default). Users are warned about this, and it is
<br>not the default.<br><br>5) astdb is stored in flash, so depending on your needs, SIP<br>registrations and/or dundi keys may get written here periodically. I<br>might make an option similar to PERSISTLOG to disable this.
<br><br> Also, you have the option of using a hard drive or alternate flash<br>device for ALL writes. Boot from flash, run from HD. Do whatever works<br>best for you and your application.<br><br>--<br>Kristian Kielhofner
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<br>Erick Perez<br>Panama Sistemas<br>Integradores de Telefonia IP y Soluciones Para Centros de Datos<br>Panama, Republica de Panama<br>Cel Panama. +(507) 6694-4780<br>------------------------------------------------------------