03-03-2009
Performance Hit With Many Files
Is it slower to open or create a file in a directory with 1 million files than a directory with 1000 files? How much slower? Where can I find information about this?
I'm mainly concerned about JFS on AIX, but also NTFS on Windows Server. Is there a difference?
I'm trying to determine a good way to store a large number of files (2 million and growing about 200 K per year). Currently, I have them in six different directories, so it's about 300 K files per directory.
Thanks!
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LEARN ABOUT REDHAT
xchkdmp
xchkdmp(8) JFS utility - dump fsck.jfs log file xchkdmp(8)
NAME
xchkdmp - dump the contents of a JFS fsck log file created with xchklog
SYNOPSIS
xchkdmp [ -f input.file ] [ -V ]
DESCRIPTION
xchkdmp dumps the contents of a JFS fsck log file that was created by JFS utility xchklog. If no input file is specified, the default path
and file name (<pwd>fscklog.new) is used. The output is written to standard out.
OPTIONS
-f input.file
Specifies the input file name and path.
input.file must be 127 characters or less in length.
input.file will be read from the present working directory unless it is fully qualified.
-V Print version information and exit (regardless of any other chosen options).
EXAMPLES
Dump the contents of the fsck service log in <pwd>fscklog.new:
xchkdmp
Dump the contents of the fsck service log in /temp/l9651107.log:
xchkdmp -f /temp/l9651107.log
REPORTING BUGS
If you find a bug in JFS or xchkdmp , please report it via the bug tracking system ("Report Bugs" section) of the JFS project web site:
http://oss.software.ibm.com/jfs
Please send as much pertinent information as possible, including any xchkdmp error messages and the complete output of running fsck.jfs
with the -v option on the JFS device.
SEE ALSO
xchklog(8), mkfs.jfs(8), fsck.jfs(8), logdump(8), logredo(8), xpeek(8)
AUTHOR
Barry Arndt (barndt@us.ibm.com)
xchkdmp is maintained by IBM.
See the JFS project web site for more details:
http://oss.software.ibm.com/jfs
January 11, 2001 xchkdmp(8)