On /home/blast

From: Michael Kohl (kohlm@mit.edu)
Date: Fri Dec 23 2005 - 12:04:06 EST


Hi,

here's my opinion on a short-term and long-term solution for /home/blast:
I don't think that increasing the size of the user directory helps.
Instead it will get even worse very soon as people become careless (like
free expansion of gas).

+very short term: clean up!
+short term: move inactive users to bud18
+long term: introduce quota system (hopefully not necessary)

!!! The user directories /home/blast should only contain data that needs
     to be backed up regularly!!!

Therefore, people should be well aware that any raw or crunched data or
excessive log output shall be stored in the scratch areas. Admittedly, I
belong to the GB-users, too. Nevertheless, on the long term I would favor
a quota system over an increase of useless beackups.

If you are afraid of data loss when storing data on scratch disks, you
should consider mirroring relevant directories with a second location by
using the "rsync" utility:

E.g., to mirror all your files from the directory bud01:/scratch/username
with bud02:/scratch/username, type

bud01:> cd /scratch/username
bud01:> rsync -nauvzlRe ssh ./* bud02:/scratch/username

Leave away the "n" option when you're confident in what you're doing.
Rsync will only copy those files that are either newer or that do not
exist yet. See "man rsync" for further options.

I'm using rsync for a daily backup of my laptop and can sleep very well.

  $ du -sc /home/blast/* 2>/dev/null | sort -n
  0 /home/blast/abs
  0 /home/blast/blast
  4 /home/blast/USAGE.LOG
  8 /home/blast/abr
  8 /home/blast/sktobler
  16 /home/blast/lost+found
  28 /home/blast/hxiang
  108 /home/blast/ransom
  288 /home/blast/coda
  504 /home/blast/mbutler
  516 /home/blast/wc
  640 /home/blast/amamo
  764 /home/blast/claudiag
  828 /home/blast/arnesen
  1108 /home/blast/rapaport
  1396 /home/blast/nsavvinv
  1876 /home/blast/lherman
  2220 /home/blast/buuren
  2448 /home/blast/doug
  2596 /home/blast/alarcon
  4008 /home/blast/palarczyk
  4256 /home/blast/jalthouse
  6092 /home/blast/sbauer
  6340 /home/blast/grubes
  6976 /home/blast/kmike
  13988 /home/blast/wchall
  16900 /home/blast/maxcht
  16976 /home/blast/lmgoggin
  17524 /home/blast/vodhanel
  18196 /home/blast/almgren
  18564 /home/blast/sthong
  20856 /home/blast/flan
  28068 /home/blast/kovash
  32916 /home/blast/zapoian
  35952 /home/blast/tsentalovich
  38556 /home/blast/zwart
  41936 /home/blast/zhangchi
  48916 /home/blast/zilong
  55420 /home/blast/zhengyi
  56232 /home/blast/jvieregg
  57460 /home/blast/maurik
  66368 /home/blast/cbdandrea
  76220 /home/blast/ezyryder
  85260 /home/blast/bibek
  85808 /home/blast/alicrocker
  88136 /home/blast/jmpavel
  90964 /home/blast/jrc
  96728 /home/blast/mcsziget
  120368 /home/blast/kboddy
  121756 /home/blast/franklin
  122820 /home/blast/kdow
  125580 /home/blast/ddutta
  156540 /home/blast/nikolas
  190180 /home/blast/msteadman
  201944 /home/blast/edsix
  212760 /home/blast/cmgreene
  214336 /home/blast/rfatemi
  221332 /home/blast/agoodhue
  236164 /home/blast/dsflash
  265756 /home/blast/mcilhany
  269340 /home/blast/seely
  276496 /home/blast/martina
  313144 /home/blast/shariton
  321648 /home/blast/egeis
  325512 /home/blast/dukedoc02
  362568 /home/blast/clasie
  398248 /home/blast/cvsroot
  408044 /home/blast/ajmasch
  418976 /home/blast/amosser
  425124 /home/blast/chris2
  425424 /home/blast/elog
  456716 /home/blast/degrush
  481980 /home/blast/tong
  659884 /home/blast/vziskin
  673000 /home/blast/hasell
  679032 /home/blast/akdogan
  690788 /home/blast/hauke
  717772 /home/blast/tavi
  975452 /home/blast/tps
  1160628 /home/blast/wangxu
  1190484 /home/blast/karpiusp
  1295580 /home/blast/kohlm
  2617704 /home/blast/adrian
  18884056 total

Regards and merry Christmas,

    Michael

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