Comment posted How to delete million of files on busy Linux servers (Work out Argument list too long) by .
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1) Why bash loop does not slow disk, compared to find? What about adding sleep to perl? 2) >keeping millions of files within the same directory is very stupid Is the following true: Even deleted files in directory reduce ext3 performance of ls. It reads inodes marked as free, which were not free. It takes time, compared to virgin inodes.
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You can even use rsync command to delete millions of files in linux by syncing with a blank directory.
View CommentView CommentThe below post does a study on file deletion.
http://www.slashroot.in/which-is-the-fastest-method-to-delete-files-in-linux
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For me the bash loop seems to work best on my production server – trying to get rid of millions of session files.
View CommentView CommentThanks for sharing your solutions – the find method simply couldnt do it because of the amount of files.
I can also recommend the rsync method from mohan
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Can you explain why you call stat() prior to unlink?
# perl -e ‘for(){((stat)[9]<(unlink))}'
This "tip" is being parroted around the internet by people who don't understand what its for, and my reasonably thorough testing indicates the stat() call slows it down.
http://www.quora.com/Linux-why-stat+unlink-can-be-faster-than-a-single-unlink/answer/Kent-Fredric?__snids__=658761123&__nsrc__=2#
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Try “Long Path Tool ” is also useful in situations where you see these error messages: Cannot read from source file or disk, there has been a sharing violation, cannot delete file or folder, the file name you specified is not valid or too long, the source or destination file may be in use and many other file managing errors.
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you might want to try moving all the non-related files outside the directory, and give it one shot: rm -rf DIR
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a even better way is: write a tool in c to remove the files, you can hard-encode the direcory path in the code, and sleep periodically, to avoid stressing the server.
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You're making it far too complex to yourself.
Just execute 'rm -f [yourneeds] &' and set process priority to a lower digi, using 'nice'.
Find the process id (pid) with 'ps' and give it a new priority:
ps -o pid,comm,nice -p 594 # replace 594 with your process id / pid
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By the way, some Linux flavours also hold the 'nice' and 'renice' command. Check your MAN-pages if your version has them.
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Hey Marco,
Thanks for the hint about renice and nice, that’s pretty adequate.
Best,
Georgi
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You're making it far too complex to yourself.
Just execute 'rm -f [yourneeds] &' and set process priority to a lower digi, using ''renice'.
Find the 'nice'for your process id (pid) with 'ps' :
ps -o pid,comm,nice -p 594 # replace 594 with your process id / pidThen set the new priority for the process ID:
renice 10 -p 595 # replace 594 with your process id / pidIt is even possible to start the process as a 'nice'process:
nice -n 10 rm -f [yourneeds]and renice it afterwards using 'renice'.
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If you need to delete a pattern contained in all files (e.g. delete just some of the files) you can use this command: cd /path/to/directory/; find . -type f -mtime +5 -print |grep -i 'WF_LOG_'| xargs rm -f
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