[Tornado-users] Tornado /home is nearly full

[Johan Raber]

Dear Tornado users,

The /home filesystem is nearly full and a situation like this can lead to
*very* unpredictable behaviour of the system. I must therefore urge you to
perform a cleanup to avoid the problems that are certain to arise. Many
people have in excess of 40GB in their home directory, which given the
#users/home_diskspace ratio is quite a lot. I would like to suggest that
everyone using more than 20GB in their home folder tries to do some
cleaning. You can find out how much you are using by checking the file
/home/diskinfo (figures are in MB).

I would firstly suggest you move non-critical data to the /nobackup
filesystems where space is available and secondly if you can compress
rarely-accessed, but presumably vital files, that would go some way. A
highly recommended way to safely move large numbers of files about in the
filesystem is to use rsync (contradictory as it may sound) and this is the
method I would recommend:

$ rsync -a /home/user/dir2move/ /nobackup/some_center/user/dir2move/
(copies the files in a safe manner between two directories)

Check that your files have been transferred using: $ diff -r
/home/user/dir2move /nobackup/some_center/user/dir2move
(Checks the directory listings recursively. There should be no output if
all is well)

Check that the sizes match:
$ du -smh /home/user/dir2move; du -smh /nobackup/some_center/user/dir2move
(Should be the same)

Do some checksumming on some files if you feel like it:
$ md5sum original_file copied_file

Lastly, but very important: Delete the original directories in the /home
filesystem.

If you require any help doing this, please do not hesitate to start a
support case on the subject matter.

Best regards,
Johan Raber

-- 
Johan Raber, PhD
Systems expert -- distributed computing
National Supercomputer Center, Linköping University
SE-581 83 LINKÖPING, SWEDEN