Re: [ccache] ccache's cleanup algorithm

[Joel Rosdahl]

Hi Scott,

In ccache's cleanup.c module, the comments say that files are deleted from
> the cache on a LRU basis.  However, the code refers to mtime, not atime, so
> it appears that ccache is, in reality, using a Least Recently *Modified* basis
> upon which to expire files from the cache.  Is that really what ccache does?
> Or did I miss something?


Yes, mtime is updated on a cache hit, looks for calls to the update_mtime
function.

-- Joel
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Re: [ccache] ccache's cleanup algorithm

[Scott Bennett]

Scott Bennett  wrote:

>  In ccache's cleanup.c module, the comments say that files are deleted
> from the cache on a LRU basis.  However, the code refers to mtime, not atime,
> so it appears that ccache is, in reality, using a Least Recently *Modified*
> basis upon which to expire files from the cache.  Is that really what ccache
> does?  Or did I miss something?  If it's really using LRM instead of LRU,
> can anyone explain why?
>  I am not susbscribed to this list, so please be sure to copy me in
> directly on any replies.  Thanks in advance!
>
 Oops.  After discovering the hard way that the list is not completely
open (i.e., a subscription is required in order to post), I subscribed and
then reattempted to post what I had tried to post earlier, but forgot to
delete the final request above.  Just ignore it; there's no need to send a
copy to me directly.  Sorry for any confusion.


  Scott Bennett, Comm. ASMELG, CFIAG
**
* Internet:   bennett at sdf.org   *xor*   bennett at freeshell.org  *
**
* "A well regulated and disciplined militia, is at all times a good  *
* objection to the introduction of that bane of all free governments *
* -- a standing army."   *
*-- Gov. John Hancock, New York Journal, 28 January 1790 *
**

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[ccache] ccache's cleanup algorithm

[Scott Bennett]

 In ccache's cleanup.c module, the comments say that files are deleted
from the cache on a LRU basis.  However, the code refers to mtime, not atime,
so it appears that ccache is, in reality, using a Least Recently *Modified*
basis upon which to expire files from the cache.  Is that really what ccache
does?  Or did I miss something?  If it's really using LRM instead of LRU,
can anyone explain why?
 I am not susbscribed to this list, so please be sure to copy me in
directly on any replies.  Thanks in advance!


  Scott Bennett, Comm. ASMELG, CFIAG
**
* Internet:   bennett at sdf.org   *xor*   bennett at freeshell.org  *
**
* "A well regulated and disciplined militia, is at all times a good  *
* objection to the introduction of that bane of all free governments *
* -- a standing army."   *
*-- Gov. John Hancock, New York Journal, 28 January 1790 *
**

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