Excellent question! It is indeed filesystem-dependent. Such performance metrics are hard to come by, since there are so many variables, and to do a good apples-apples comparison, you need the same computer with the same disks and install multiple OS's. But it may not be necessary, really, to get such statistics. One can look at the filesystem architecture, directory handling semantics, and conclude one might be better than the other.
Unforatunally, I cannot provide specifics on JFS nor NTFS. However, ReiserFS and modern versions of ext2 (on filesystems created with -O DIR_INDEX), file creation and lookup are very fast; they both use a hash index to find files. So if you know the name of the file, it can be found almost instantly (as I understand it and have experienced). On older versions of ext2, things really started to slow down after the directory entry itself extended to one or more indirect blocks -- maybe 1000 or so.
You do know one way to store large amounts of files is to create a directory hierarchy that is keyed on the filenames themselves? So files named "ergo1802.txt" might be stored in:
I reinstalled my Linux box with RedHat 7.2 and used the ext3 journaling file system. This thing is a pig now. There isn't much running on the box, and performance is sad. (1 Reply)
Hi all, I have a php file that grabs xml, parses it and updates my db accordingly. I want to automate the execution of this process, rather than having to hit the url manually.
I have been looking into using cron to execute a script to do this, however i'm not exactly sure what command i would... (1 Reply)
hi,
in my application, i have set up to capture SIGINT and execute a handler.the problem is whenever i hit C-c, multiple SIGINT are sent to the application.I have blocked the SIGINT right after catching the first one but it is unsuccessful.Here is what i do :
jmp_buf main_loop;
int... (1 Reply)
I have a unix shell script (ex.sh) written.
How to find out how many users (incl. myself) have run this .sh ?
I can insert code snipet at top of script if need be.
- Ravi (2 Replies)
Hello,
I'm having trouble looking for info for SUSIE on this CVE-2012-4681.
This is basically the newest Java hit. It is mostly a web browser issue but I would like to see if the versions on our servers are vulnerable. I already found the pages/info for Solaris and RHEL.
Any help would be... (4 Replies)
Hello,
I'm having an issue with VNC. Security at work says that they scanned my servers (Solaris, RHEL, SLES) and found that you don't need a password to access a VNC session. I have tested this and you can't login to the VNC session without a password. Can someone tell what the Retina scanner... (1 Reply)
Hello,
I am looking to hit a URL using curl and click on submit button so that I can get the results. The below is the code
<input name="tos_accepted" id="tos_accepted" class="button" type="submit" value="Yes, I Agree"/>
<input name="tos_discarded" id="tos_discarded"... (1 Reply)
Hi Gurus,
I need to merge two files.
file1 (small file, only one line)
this is first linefile2 (large file)
abc
def
ghi
... I use below command to merge the file, since the file2 is really large file, the command read whole file2, the performance is not good.
cat file1 > file3... (7 Replies)
Discussion started by: green_k
7 Replies
LEARN ABOUT SUSE
jfs_fscklog
jfs_fscklog(8) Extract/Display JFS fsck Log jfs_fscklog(8)NAME
jfs_fscklog - extract a JFS fsck service log into a file and/or format and display the extracted file
SYNOPSIS
jfs_fscklog [ -d ] [ -e device ] [ -f output.file ] [ -p ] [ -V ]
DESCRIPTION
jfs_fscklog with option -e device extracts the contents of either the most recent or immediately prior (specified with option -p) JFS fsck
service log from the specified device, and writes the output to a file. The file name may be specified with the -f option, or the default
file name is <pwd>fscklog.new. If the -p option is used, the default file name is <pwd>fscklog.old.
jfs_fscklog with option -d formats and displays the contents of the extracted file.
jfs_fscklog with options -d and -e device extracts and displays the JFS fsck service log.
OPTIONS -d Format and display a previously extracted JFS fsck service log.
-e device
Extract the JFS fsck service log from device and store it in a file. (device is the special file name corresponding to the actual
device from which the fsck log will be extracted (e.g. /dev/hdb1 )).
-f file.name
Specify the file name, overriding the default file name. When used with -e device, file.name specifies the name of the file into
which the JFS fsck log will be extracted. When used with -d, file.name specifies the name of the extracted file whose contents will
be formatted and displayed.
file.name must be 127 characters or less in length.
file.name will be created in the present working directory unless it is fully qualified.
-p Extract the prior log (as opposed to the most recent log).
-V Print version information and exit (regardless of any other chosen options).
EXAMPLES
Extract the most recent JFS fsck log on /dev/hda5 into <pwd>fscklog.new:
jfs_fscklog -e /dev/hda5
Extract the most recent JFS fsck log on /dev/hdb3 into /temp/l9651107.log:
jfs_fscklog -e /dev/hdb3 -f /temp/l9651107.log
Display the JFS fsck log that was extracted into /temp/l9651107.log:
jfs_fscklog -d -f /temp/l9651107.log
Extract and display the previous JFS fsck log from /dev/hda8:
jfs_fscklog -e /dev/hda8 -d -p
REPORTING BUGS
If you find a bug in JFS or jfs_fscklog, please report it via the bug tracking system ("Report Bugs" section) of the JFS project web site:
http://jfs.sourceforge.net/
Please send as much pertinent information as possible, including any jfs_fscklog error messages and the complete output of running jfs_fsck
with the -v option on the JFS device.
SEE ALSO jfs_fsck(8), jfs_mkfs(8), jfs_tune(8), jfs_logdump(8), jfs_debugfs(8)AUTHOR
Barry Arndt (barndt@us.ibm.com)
jfs_fscklog is maintained by IBM.
See the JFS project web site for more details:
http://jfs.sourceforge.net/
October 28, 2002 jfs_fscklog(8)