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Full Discussion: Not able to delete log file
Operating Systems Solaris Not able to delete log file Post 302865241 by Don Cragun on Friday 18th of October 2013 03:40:40 AM
Old 10-18-2013
Quote:
Originally Posted by solaris_1977
jlliagre, when I do do "cat soa.out", it was taking very long time to give output, so I did Ctlr+C and came out. This made me think that data is still so big here, even after nullify it. Am I wrong here ?
In future, what will be best to nullify it again, without taking application downtime ?
If you're going to use cat filename, you have a huge file and cat will read every byte of it. If you look at du filename, the number of disk blocks used to store the contents of the file may be small (as I explained before).

You haven't told us anything about what this application does nor why it is writing gigabytes into a file that the people using the application don't want to see. If you have a process that your users say you have to run continuously and it writes gigabytes of logs that no one wants to see, you can choose one of several options (including, but not limited to):
  1. Get the people to wrote the application to change it.
  2. Restart it regularly (and rotate or delete the log files while it is stopped).
  3. Buy bigger disks to hold all of the data you nobody wants.
  4. Patch the kernel to set the O_APPEND flag in the kernel table entry for the file descriptor involved and truncate it the way you're doing it now.
  5. Refuse to run an application that fills up your filesystems with huge amounts of unwanted data until your users provide a version of the application that work correctly.
  6. Try changing the log file to be a symlink pointing to /dev/null the next time you reboot your system before you start the application. (If the application removes or rotates log files when it restarts, this won't work.)
 

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LEARN ABOUT OPENSOLARIS

gnomevfs-cat

gnomevfs-cat(1) 						   User Commands						   gnomevfs-cat(1)

NAME

       gnomevfs-cat - print a file to standard output using the VFS system

SYNOPSIS

       gnomevfs-cat URI

DESCRIPTION

       gnomevfs-cat is obsolete.  It has been superseded by gvfs-cat.  See gvfs-cat(1).

       gnomevfs-cat prints a file to standard output using the virtual file system to access the file via a URI.

OPERANDS

       The following operands are supported:

       URI	       Specifies the file location in standard URI format.

EXAMPLES

       Example 1: Cat a File From a Web Server

       example% gnomevfs-cat http://www.sun.com

       Example 2: Cat a Local File

       example% gnomevfs-cat file:///home/user/README.txt

ENVIRONMENT VARIABLES

       See environ(5) for descriptions of the following environment variables: NLSPATH.

EXIT STATUS

       The exit value 0 is returned regardless of success or failure.

FILES

       The following files are used by this application:

       /usr/bin/gnomevfs-cat   Executable to print a file to standard output using the VFS system

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWgnome-vfs		   |
       +-----------------------------+-----------------------------+
       |Interface stability	     |Obsolete Volatile 	   |
       +-----------------------------+-----------------------------+

SEE ALSO

       gnomevfs-copy(1), gnomevfs-info(1), gnomevfs-ls(1), gnomevfs-mkdir(1), gvfs-cat(1), attributes(5), environ(5)

NOTES

       Written by Stephen Browne, Sun Microsystems Inc., 2004.

SunOS 5.11							    14 May 2008 						   gnomevfs-cat(1)
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