About reading and writing to files
rdm at cfcl.com
Fri May 30 01:30:50 PDT 2003
At 3:04 AM -0500 5/30/03, Bingrui Foo wrote:
>I'm wondering in freeBSD, if I have a directory with 10,000 files, or
>maybe even 100,000 files, each about 5 kb long. Wondering will reading and
>writing to any one of these files in C be affected by the sheer number of
>these files? Will the access time be affected significantly?
>Just wondering because not sure whether I should put these data in a
>database or just use files with unique names.
>Also will separating the files into many directories help?
Looking up .../x/12/34/56 can be done in logarithmic time (i.e., look up
.../x/12, then .../x/12/34, then .../x/12/34/56); looking up
.../y/123456 (unless some optimization has been added) will require a
through the directory. In short, don't go there...
email: rdm at cfcl.com; phone: +1 650-873-7841
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