<div dir="ltr"><br><div class="gmail_extra"><br><br><div class="gmail_quote">On Mon, Apr 15, 2013 at 1:53 PM, Pietro Paolini <span dir="ltr"><<a href="mailto:pulsarpietro@aol.com" target="_blank">pulsarpietro@aol.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div class=""><div class="h5"><br>
On Apr 15, 2013, at 6:26 PM, <a href="mailto:Valdis.Kletnieks@vt.edu">Valdis.Kletnieks@vt.edu</a> wrote:<br>
<br>
> On Mon, 15 Apr 2013 16:24:17 +0200, Pietro Paolini said:<br>
>> I have to compare different filesystems options for an embedded platform<br>
><br>
> Step 0: Get an accurate list of what requirements the embedded platform<br>
> has. Is the storage flash based? Spinning oxide? What are the relative<br>
> read/write ratios (some systems will have almost no writes, but a Tivo<br>
> will have almost as many writes as reads (possibly more, even). What<br>
> sustained rates of file I/O and metadata activity will you expect?<br>
> Do you have a fairly high CPU budget and can afford more cycles, or are<br>
> you using a slower ARM and have to do it with as few cycles as possible?<br>
> How big will the filesystem be? How many meg/gig of data, and how many<br>
> files? Small numbers of honking-huge files, or zillions of 139 byte files?<br>
> Does the filesystem have to support TRIM or whiteouts? Plus any application<br>
> specific issues I may have overlooked...<br>
><br>
> Step 1: for i in $filesystems; do compare_specs($needed_specs, $i); done.<br>
><br>
> You get the idea.<br>
<br>
</div></div>Thanks for the smart question, I know the answer for some of them but I realised I have to<br>
do further investigation on regarding my system needs.<br>
<br>
Regarding the Step 1 : where do you usually find specs ? There is somethings like RFC for filesystem ?<br></blockquote><div><br></div><div>This is a pretty exhaustive list, but good as a starting point. <br><br><a href="http://en.wikipedia.org/wiki/Comparison_of_file_systems#Features">http://en.wikipedia.org/wiki/Comparison_of_file_systems#Features</a><br>
</div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
needed_specs=$() ? :-)<br>
<br>
Thanks<br>
<div class=""><div class="h5">Pietro.<br>
<br>
<br>
<br>
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</div></div></blockquote></div><br><br clear="all"><br>-- <br>Thanks -<br>Manish<br>
</div></div>