I'm curious about this observation: If I do a find
search on the root directory, it ordinarily takes a minute or two
-- as one would expect if it were examining everything afresh.
But if I follow that up with a different find search on the
root, it finishes in a few seconds.
Does find cache file system information and reuse it under
certain conditions?* Or does Linux itself cache some sort of
information from an initial search that a subsequent search
benefits from?
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09-15-2012, 11:16 PM
John Hupp
Does the "find" command cache file system info?
I'm curious about this observation: If I do a find
search on the root directory, it ordinarily takes a minute or two
-- as one would expect if it were examining everything afresh.
But if I follow that up with a different find search on the
root, it finishes in a few seconds.
Does find cache file system information and reuse it under
certain conditions?* Or does Linux itself cache some sort of
information from an initial search that a subsequent search
benefits from?
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09-15-2012, 11:22 PM
Joshua Smith
Does the "find" command cache file system info?
Find doesn't cache per se but the file system does.*
--Josh SmithKD8HRX
Email/jabber: juicewvu@gmail.comPhone: 304.237.9369(c)
Sent from my iPhone
On Sep 15, 2012, at 7:16 PM, John Hupp <ubuntu@prpcompany.com> wrote:
I'm curious about this observation: If I do a find
search on the root directory, it ordinarily takes a minute or two
-- as one would expect if it were examining everything afresh.
But if I follow that up with a different find search on the
root, it finishes in a few seconds.
Does find cache file system information and reuse it under
certain conditions?* Or does Linux itself cache some sort of
information from an initial search that a subsequent search
benefits from?
--
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Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-users
--
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09-15-2012, 11:33 PM
John Hupp
Does the "find" command cache file system info?
That's good to know.* Thanks!
On 9/15/2012 7:22 PM, Joshua Smith
wrote:
Find doesn't cache per se but the file system does.*
On Sep 15, 2012, at 7:16 PM, John Hupp <ubuntu@prpcompany.com>
wrote:
I'm curious about this observation: If I do a
find search on the root directory, it ordinarily takes a
minute or two -- as one would expect if it were examining
everything afresh.
But if I follow that up with a different find search
on the root, it finishes in a few seconds.
Does find cache file system information and reuse it
under certain conditions?* Or does Linux itself cache
some sort of information from an initial search that a
subsequent search benefits from?
--
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ubuntu-users@lists.ubuntu.com
Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-users
--
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09-15-2012, 11:36 PM
John Hupp
Does the "find" command cache file system info?
Josh Smith from the Ubuntu mail
list responded: "Find doesn't cache per se but the file system
does."
On 9/15/2012 6:28 PM, John Hupp wrote:
I'm curious about this observation: If I do a find
search on the root directory, it ordinarily takes a minute or
two -- as one would expect if it were examining everything
afresh.
But if I follow that up with a different find search on the
root, it finishes in a few seconds.
Does find cache file system information and reuse it under
certain conditions?* Or does Linux itself cache some sort of
information from an initial search that a subsequent search
benefits from?
--
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09-16-2012, 04:06 PM
Liam Proven
Does the "find" command cache file system info?
On 16 September 2012 00:16, John Hupp <ubuntu@prpcompany.com> wrote:
> I'm curious about this observation: If I do a find search on the root
> directory, it ordinarily takes a minute or two -- as one would expect if it
> were examining everything afresh.
>
> But if I follow that up with a different find search on the root, it
> finishes in a few seconds.
>
> Does find cache file system information and reuse it under certain
> conditions? Or does Linux itself cache some sort of information from an
> initial search that a subsequent search benefits from?
This is precisely what a disk cache is *for*. It is the purpose of its
existence. It caches the indices of, well, pretty much all the
directories of your disk, so next time, the search is purely in
memory.
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09-16-2012, 04:54 PM
John Hupp
Does the "find" command cache file system info?
Thanks.* Josh Smith made pretty
much the same astute observation.
On 9/16/2012 12:06 PM, Liam Proven
wrote:
On 16 September 2012 00:16, John Hupp <ubuntu@prpcompany.com> wrote:
I'm curious about this observation: If I do a find search on the root
directory, it ordinarily takes a minute or two -- as one would expect if it
were examining everything afresh.
But if I follow that up with a different find search on the root, it
finishes in a few seconds.
Does find cache file system information and reuse it under certain
conditions? Or does Linux itself cache some sort of information from an
initial search that a subsequent search benefits from?
This is precisely what a disk cache is *for*. It is the purpose of its
existence. It caches the indices of, well, pretty much all the
directories of your disk, so next time, the search is purely in
memory.
--
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Does the "find" command cache file system info?
