[GRLUG] NOT LINUX - hybrid drives

[Bob Kline]

On Sat, Nov 10, 2012 at 11:43 AM, John-Thomas Richards <jtr at jrichards.org>wrote:

> On Sat, Nov 10, 2012 at 11:18:46AM -0500, Bob Kline wrote:
> > 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=B003NSBF32mains
> > > 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.
>
> Methinks Bob & Jon maddog Hall were in kindergarten together.
>
> :)


Ah, yup. Let's just say my future
is largely behind me now....

But as Einstein said, "time is an
illusion, if a persistent one."

   -- Bob
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