<br><br><div class="gmail_quote">On Sat, Nov 10, 2012 at 11:03 AM, Adam Tauno Williams <span dir="ltr"><<a href="mailto:awilliam@whitemice.org" target="_blank">awilliam@whitemice.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div class="im">Bob Kline <<a href="mailto:bob.kline@gmail.com">bob.kline@gmail.com</a>> wrote:<br>
><a href="http://www.amazon.com/gp/product/ref=pe_172730_26630760_pe_b2/?ASIN=B003NSBF32" target="_blank">http://www.amazon.com/gp/product/ref=pe_172730_26630760_pe_b2/?ASIN=B003NSBF32</a> mains on spinning rust in the SSD case).</div>

<div class="im"><br>
>Conceptually, the "sticky bit" in file<br>
>permissions was intended for just that<br>
>purpose,<br>
<br>
</div>I think the sticky bit was more about trying to control caching.<br></blockquote><div><br></div><div>Do tell:</div><div><br></div><div>**</div><div><span style="font-family:sans-serif;font-size:13px;line-height:19px;background-color:rgb(255,255,255)">The sticky bit was introduced in the </span><a href="http://en.wikipedia.org/wiki/Research_Unix" title="Research Unix" style="text-decoration:none;color:rgb(11,0,128);background-image:none;background-color:rgb(255,255,255);font-family:sans-serif;font-size:13px;line-height:19px">Fifth Edition</a><span style="font-family:sans-serif;font-size:13px;line-height:19px;background-color:rgb(255,255,255)"> of Unix for use with pure executable files. When set, it instructed the </span><a href="http://en.wikipedia.org/wiki/Operating_system" title="Operating system" style="text-decoration:none;color:rgb(11,0,128);background-image:none;background-color:rgb(255,255,255);font-family:sans-serif;font-size:13px;line-height:19px">operating system</a><span style="font-family:sans-serif;font-size:13px;line-height:19px;background-color:rgb(255,255,255)"> to retain the </span><a href="http://en.wikipedia.org/wiki/Text_segment" title="Text segment" class="mw-redirect" style="text-decoration:none;color:rgb(11,0,128);background-image:none;background-color:rgb(255,255,255);font-family:sans-serif;font-size:13px;line-height:19px">text segment</a><span style="font-family:sans-serif;font-size:13px;line-height:19px;background-color:rgb(255,255,255)"> of the program in </span><a href="http://en.wikipedia.org/wiki/Virtual_memory" title="Virtual memory" style="text-decoration:none;color:rgb(11,0,128);background-image:none;background-color:rgb(255,255,255);font-family:sans-serif;font-size:13px;line-height:19px">swap space</a><span style="font-family:sans-serif;font-size:13px;line-height:19px;background-color:rgb(255,255,255)"> after the </span><a href="http://en.wikipedia.org/wiki/Process_(computing)" title="Process (computing)" style="text-decoration:none;color:rgb(11,0,128);background-image:none;background-color:rgb(255,255,255);font-family:sans-serif;font-size:13px;line-height:19px">process</a><span style="font-family:sans-serif;font-size:13px;line-height:19px;background-color:rgb(255,255,255)"> exited. This speeds up subsequent executions by allowing the kernel to make a single operation of moving the program from swap to real memory. Thus, frequently-used programs like editors would load noticeably faster</span></div>
<div>**</div><div><br></div><div>From <a href="http://en.wikipedia.org/wiki/Sticky_bit">http://en.wikipedia.org/wiki/Sticky_bit</a></div><div><br></div><div>The sticky bit might have evolved </div><div>into something more, but the concept</div>
<div>dates to the days when memory and</div><div>hard drive space was very limited.</div><div><br></div><div>   -- Bob</div><div><br></div><div><br></div><div><br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div class="im"> <br>
<br>
--<br>
</div>Adam Tauno Williams, LPI1 / NCLA<br>
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