Deleting a million of files .. Post: 302897598

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Top Forums UNIX for Dummies Questions & Answers Deleting a million of files .. Post 302897598 by rbatte1 on Tuesday 15th of April 2014 04:55:42 AM

04-15-2014

Moderator

If actual elapse time is critical because of ongoing processing, could I suggest:-

Code:

mv /path /path-to-del
mkdir -m 777 /path
chown user:group /path

Doing this will be a near instantaneous operation and then with the directory renamed and a new empty one created, your processing can continue whilst you dispose of what is now called /path-to-del at your leisure.

The -m 777 on the mkdir sets the permissions for the directory. The user:group on the chown sets both the owner and group in one operation, rather than having to do a chown and a chgrp

I might be way off course, but I was confused as to why the timing matters so much. If you still want a choice for your original question, I would go with rm -f /path

Another alternate might be available if this is a filesystem you can unmount for a few moments:-

Code:

umount /path
newfs your-options /dev/logical-volume
mount /path

You don't give us an OS or any clue about what devices the disks are on, so I've tried to be generic here. You make have to use mkfs, crfs, fscreate or other things depending what you are running. Of course, this may not be an option.

I hope that these suggestions might help.

Robin
Liverpool/Blackburn
UK

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LEARN ABOUT DEBIAN

dpns-mkdir

DPNS-MKDIR(1)							DPNS User Commands						     DPNS-MKDIR(1)

NAME

       dpns-mkdir - make DPNS directory in the name server

SYNOPSIS

       dpns-mkdir [-m mode] [-p] path...

DESCRIPTION

       dpns-mkdir creates the specified DPNS directories in the name server.

       This  requires  write permission in the parent directory.  The owner ID and group ID of the new directories are set to the requestor's real
       user ID and group ID, respectively.

       path   specifies the DPNS pathname.  If path does not start with /, it is prefixed by the content of the DPNS_HOME environment variable.

       The dpns-mkdir command has the following options:

       -m     specifies the mode to be used.  Default mode is 777.

       -p     creates all the non-existing parent directories first.  The mode set for the created intermediate directories is the logical differ-
	      ence between 0777 and the user umask but at least 0300.

EXIT STATUS

       This program returns 0 if the operation was successful or >0 if the operation failed.

SEE ALSO

       Castor_limits(4), dpns_chmod(3), dpns_mkdir(3), dpns_umask(3)

AUTHOR

       LCG Grid Deployment Team

DPNS
							   $Date: 2001/10/04 12:12:54 $ 					     DPNS-MKDIR(1)