[GRLUG] NOT LINUX - hybrid drives

[Bob Kline]

On Sat, Nov 10, 2012 at 11:03 AM, Adam Tauno Williams <
awilliam at whitemice.org> wrote:

> Bob Kline <bob.kline at gmail.com> wrote:
> >
> http://www.amazon.com/gp/product/ref=pe_172730_26630760_pe_b2/?ASIN=B003NSBF32 mains
> on spinning rust in the SSD case).
>
> >Conceptually, the "sticky bit" in file
> >permissions was intended for just that
> >purpose,
>
> I think the sticky bit was more about trying to control caching.
>

Do tell:

**
The sticky bit was introduced in the Fifth
Edition<http://en.wikipedia.org/wiki/Research_Unix> of
Unix for use with pure executable files. When set, it instructed the operating
system <http://en.wikipedia.org/wiki/Operating_system> to retain the text
segment <http://en.wikipedia.org/wiki/Text_segment> of the program in swap
space <http://en.wikipedia.org/wiki/Virtual_memory> after the
process<http://en.wikipedia.org/wiki/Process_(computing)> 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
**

>From http://en.wikipedia.org/wiki/Sticky_bit

The sticky bit might have evolved
into something more, but the concept
dates to the days when memory and
hard drive space was very limited.

   -- Bob




>
> --
> Adam Tauno Williams, LPI1 / NCLA
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