Introducing the DMF file archiver
What is the DMF File archiver:
The file archiver is a
combination of a very high performance disk system coupled with a large
high speed tape library:
35 TByte disk cache
(approximately
30 day cache).
automated robotics to handle
tape mounts.
The file archiver is designed
to be an archival repository for data. Workstation and pc/mac backups are
done on a separate system.
Only large files (greater than
4096 Bytes) are migrated to tape.
Two copies are made of all migrated
data and unix dumps are done everyday for the file system.
Getting an account: Email
wyoung@scripps.edu
How do you access the archiver:
Currently available on UNIX
machines (including Mac OSX) and Windows NT/2000/XP (PC usage see the
xdmf web page)
add /tsri/dmf/bin to your path
use dmf command:
beamish% dmf help
Commands Available
-------------------------
cat - displays
the contents of a file.
cd -
changes directory.
chgrp - changes the group
associated with a file.
chmod - change the protection
of a file.
cp -
copies file on archiver.
get - gets
a file from archiver.
echo - echos arguments.
(Useful for wildcards.)
head - prints the
first few lines of a file.
help - prints this
message.
ls -
lists files on archiver.
local - executes a command
on the local machine.
mkdir - makes a directory
on archiver.
more - display a
file in paged mode.
mv -
renames a file on archiver.
pwd - prints
current working directory.
quit - exits.
revision - prints the current
revision of dmf.
rm -
deletes a file from archiver.
rmdir - deletes an empty
directory from archiver.
store - stores a file
on archiver.
tail - prints the
last few lines of a file.
tar - create a tar
file, list or extracts tar file from archiver.
Creating a directory:
beamish% dmf mkdir results
Storing a file:
To store a tar file with results
in your results directory:
beamish% dmf put GB_RNA.tar results
storing GB_RNA.tar to dmf:/home/wyoung/results
Storing a directory:
atlas% dmf tar c new_results.tar
spider
creating /home/wyoung/new_results.tar
from spider
Listing contents:
beamish% dmf ls results
GB_RNA.tar
Listing tar files:
To list the contents of a tar
file stored on dmf:
atlas% dmf tar t new_results.tar
...
Restoring a file:
beamish% dmf get results/GB_RNA.tar
/tmp
getting dmf:/home/wyoung/results/GB_RNA.tar
to /tmp
Restoring a directory:
To restore a directory stored
as a tar file on dmf to you current directory:
atlas% dmf tar x new_results.tar
restoring /home/wyoung/new_results.tar
to /scratch/wyoung/99431.atlas
....
Problems:
Example 1:
pynchon% dmf ls
Permission denied.
rsh: connection failed
Command failed to execute.
Mon Apr 10 18:20:54 PDT 2000
by
default, access is only granted from a users "home" computer. users must
control access to their files. Add the additional hosts to .rhosts on archiver
(this must be done from "home" computer).
beamish% cat > junk
beamish
buzz
pynchon
^d
beamish% dmf put junk .rhosts
storing junk to dmf:/home/wyoung/.rhosts
Example 2:
beamish% dmf ls
Mon Apr 10 18:23:10 PDT 2000
dmf is temporarily unavailable, sleeping for 300 secs.
The
system is temporarily unavailable, please be patient.
Advanced:
beamish% dmf ls -l results
total 664
-rw-r--r-- 1 wyoung
rcgroup 337920 Apr 10 18:17 (MIG) GB_RNA.tar
beamish% dmf ls -l results
total 0
-rw-r--r-- 1 wyoung
rcgroup 337920 Apr 10 18:17 (OFL) GB_RNA.tar
REG indicates file is only
on disk (new or small file)
MIG indicates file is currently
being written to tape
DUL indicates file is both
on tape and disk
OFL indicates file exists
only on tape
UNM indicates file is currently
being read from tape
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