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**** The Hebrew University of Jerusalem ****
**** Computation Center ****
News Bulletin #33
15-January-1993
Today's topics:
- New batch queues arrangement.
- Compression and decompression software.
o New batch queues arrangement: Starting from today (15/1/93 at about
10:00) the general-purpose batch queues will be arranged differently
than before. The idea is to allow large jobs to run to completion
in whatever queue they are submitted and to spread the batch load
over all available systems. However, there are restrictions for
various software packages due to licensing which the new system
takes care of this issue also.
In the new system there is one general-purpose queue called
SYS$BATCH and a few queues for licensed software: IMSL_BATCH,
MATH_BATCH and SAS_BATCH. In addition there is (as before) the TAPE
batch queue for tapes access and the SCSI_TAPE queue for accessing
4mm and 8mm tapes. The SYS$LONG and SYS$FAST queues are removed.
All jobs running in SYS$BATCH will start at high batch priority;
after 60 minutes of CPU time the priority will be reduced, and after
24 hours of CPU it will be further reduced (these times might be
changed as the need arrise). After the 24 hours the job will run to
completion at the lowest priority. Please NEVER submit a job to one
of the queues that SYS$BATCH feeds, only to SYS$BATCH. This allows
even distribution of the load among a few systems.
MATH_BATCH is used for jobs using the Mathematica and Maple
packages. IMSL_BATCH is used for jobs using IMSL and Exponent,
while SAS_BATCH is used for jobs using the SAS package. These
queues behave like SYS$BATCH but the timings are different. There
is no longer a batch queue with time limit.
o Compression software: We have installed a public domain software
used for compression and decompression using the LZW method. The
commands COMPRESS and DECOMPRESS calls this package in the format:
$ COMPRESS input-file-name output-file-name
When you compress a file to be decompress by a Unix Uncompress
program try the parameters:
$ COMPRESS/EXPORT=(UNIX,NOENDMARKER) Infile Outfile
and in order to decompress a file compressed on a Unix system use
the command:
$ COMPRESS/IMPORT=(UNIX,NOENDMARKER)/MODE=STREAM Infile Outfile
NOTE: This is a public domain program and is given without any
guarantee.
__Yehavi:
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