<br><br><div class="gmail_quote">On Tue, Feb 14, 2012 at 10:41 AM, <a href="mailto:mike@trausch.us">mike@trausch.us</a> <span dir="ltr"><<a href="mailto:mike@trausch.us">mike@trausch.us</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div class="im">On 02/14/2012 10:38 AM, Jim Kinney wrote:<br>
> I would be pretty happy with a hardware RAID controller that implemented<br>
> the kernel's RAID functions with a flashed fpga. That would be an ideal<br>
> rig to me. :-)<br>
<br>
</div>I doubt it would be anywhere as fast. :-)<br></blockquote><div><br>I disagree. The performance hit on software raid is in two locations: write and checksum. Software raid has to issue multiple writes and process them until completion where hardware raid offloads those interrupts from the kernel. Checksum issues are the other big cpu hog that can be offloaded for hardware RAID.<br>
<br>There are GHz speed FPGAs but high MHz is plenty sufficient as the IO is MHz anyway.<br><br>There's been talk for a while of FPGAs becoming more mainstream in commodity IT. Imagine the fun of a board chipset upgrade with a reflash! Conversely, imagine the nightmare of security with a trojaned chipset flash.<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 class="im"><br>
--- Mike<br>
<br>
--<br>
A man who reasons deliberately, manages it better after studying Logic<br>
than he could before, if he is sincere about it and has common sense.<br>
</div> --- Carveth Read, “Logic”<br>
<br>
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<br></blockquote></div><br><br clear="all"><br>-- <br>-- <br>James P. Kinney III<br><br>As long as the general population is passive, apathetic, diverted to
consumerism or hatred of the vulnerable, then the powerful can do as
they please, and those who survive will be left to contemplate the
outcome.<br>- <i><i><i><i>2011 Noam Chomsky<br><br><a href="http://heretothereideas.blogspot.com/" target="_blank">http://heretothereideas.blogspot.com/</a><br></i></i></i></i><br>