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20040505: modificatoins to LDM scour script



>From: "Karen Cooper" <address@hidden>
>Organization: NOAA/National Severe Storms Laboratory
>Keywords:  200405051451.i45Ep0tK004901 IDD CRAFT hardware

Karen, Robert, et. al.,

>FYI: regarding the scour script.
>
>On linux a simple modification to the scour script can allow you to 
>remove files on the order of minutes (instead of the default days).   It 
>also works on Solaris if you install gfind and use it as opposed to the 
>Solaris find command.
>
>The change is:
>
>original:
>  find . -type f -mtime +$FINDAGE -name "$pattern" -exec rm -f {} \;) \
> 
>new:
>  find . -type f -mmin +$FINDAGE -name "$pattern" -exec rm -f {} \;) \
>
>The just modify your scour settings to be minutes not days.
>
>This has worked very well on many of my systems where I ony keep 1-4 
>hours of data at a time.

A different change you can make to ~ldm/bin/scour makes it much more
efficient and is supported on all platforms:

change:

                 find . -type f -mtime +$FINDAGE -name "$pattern" \
                     -exec rm -f {} \;) && touch "$edir/.scour$pattern"

to:
                 find . -type f -mtime +$FINDAGE -name "$pattern" \
                     -print | xargs rm -f ) && touch "$edir/.scour$pattern"

Here a list of files to be deleted will be passed to 'xargs' which will run
'rm -f'.  'xargs' will break up the command line into as many pieces
it needs to do all of the scouring.  The original scour code execs
'rm -f' for each file that is to be deleted.

The modified 'scour' can be found in the pub/ldm/scour directory
of anonymous FTP on our FTP server, ftp.unidata.ucar.edu.

The modification listed above will be included in future LDM releases
(it is not in ldm-6.0.14 or ldm-6.0.15).

>address@hidden
>Phone:405-366-0434     
>Cell:405-834-8559
>SAIC/Systems Analyst
>National Severe Storms Laboratory

Cheers,

Tom
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