Empty directory, large size and performance

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01-20-2012

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Empty directory, large size and performance

Hi,

I've some directory that I used as working directory for a program. At the end of the procedure, the content is deleted. This directory, when I do a ls -l, appears to still take up some space. After a little research, I've seen on a another board of this forum that it's not really taking space, but it's still reporting the inodes that it was using. Those inodes are marked as reusable so I don't loose any space.

My question is, does this affect the performance of the filesystem at all?
I know the easy solution is to erase the directory and recreate it.
But for my personal enlightenment I would really like to know.

Thanks in advance
Benoit Desmarais

bdx

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LEARN ABOUT HPUX

cachefslog

cachefslog(1M)															    cachefslog(1M)

NAME

       cachefslog - Cache File System logging

SYNOPSIS

       logfile| cachefs_mount_point

DESCRIPTION

       The  command is used to enable or disable logging for a cachefs_mount_point.  When the command is used without any options, it displays the
       logfile.  The logfile contains information on the operation performed on a cachefs_mount_point and statistics used by to  get  the  working
       set  size  of cache directory.  The specified logfile will contain information for all the CacheFS mount points using the same cache direc-
       tory.  A logfile and a cache directory have a 1-to-1 mapping; that is, even if a cache directory is removed and	recreated  with  the  same
       name, the logfile used in the previous instance of the cache directory cannot be reused with the new cache directory.

       Enabling  logging  may  have  performance  impact, even if minimal, on the operations for all the CacheFS mount points using the same cache
       directory.  The command is mainly used for debugging purposes.

   Options
       The following options are supported.  You must be a superuser to use the and options.

       Specify the logfile to be used.

       Halt logging.

   Operands
       cachefs_mount_point
		      A mount point of a cache file system.

RETURN VALUE

       returns the following values:

	      Success.

	      non-zero	An error occurred.

EXAMPLES

	      1.  Checking the logging of a directory.

	      This example checks if the CacheFS file system is being logged:

	      2.  Changing the logfile.

	      This example changes the logfile of to

	      3.  Verifying the change of a logfile.

	      This example verifies the change of the previous example:

	      4.  Halting the logging of a directory.

	      This example halts logging for the directory:

AUTHOR

       was developed by Sun Microsystems, Inc.

SEE ALSO

       cachefsstat(1M), cachefswssize(1M), cfsadmin(1M).

																    cachefslog(1M)

Red Hat