Re: Saving data

From	glen herrmannsfeldt <gah@ugcs.caltech.edu>
Newsgroups	comp.os.vms
Subject	Re: Saving data
Date	2011-04-29 21:08 +0000
Organization	A noiseless patient Spider
Message-ID	<ipf9bm$67c$1@dont-email.me> (permalink)
References	<91vtjrFba6U1@mid.individual.net> <ipeg50$ss7$1@dont-email.me> <ipetpp$5er$2@dont-email.me> <ipf17o$15n$1@dont-email.me>

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Simon Clubley <clubley@remove_me.eisner.decus.org-earth.ufp> wrote:
> On 2011-04-29, glen herrmannsfeldt <gah@ugcs.caltech.edu> wrote:

>> But there is also gzip, which doesn't seem like a bad solution.

> Unless the functionality has been added with the most recent versions,
> gzip _by itself_ only compresses single files into standalone compressed
> versions of themselves. It does not compress multiple input files into one
> combined archive.

> For that functionality, you need to use it with a archiving tool like tar.

Yes, I meant zip, which uses the same compression method, except
it adds an index at the end.  You can unzip a single file zip with
gunzip.  If you know where each file starts, you can unzip them
one at a time with gunzip and a program like dd that can seek.

I am not sure what happens if you concatenate gzip files, but it
might be that zip can still undo them.  It will complain about not
having the index.

-- glen

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Saving data billg999@cs.uofs.edu (Bill Gunshannon) - 2011-04-29 13:43 +0000
  Re: Saving data Simon Clubley <clubley@remove_me.eisner.decus.org-Earth.UFP> - 2011-04-29 13:57 +0000
    Re: Saving data Simon Clubley <clubley@remove_me.eisner.decus.org-Earth.UFP> - 2011-04-29 14:13 +0000
    Re: Saving data billg999@cs.uofs.edu (Bill Gunshannon) - 2011-04-29 14:33 +0000
      Re: Saving data Rob Brown <mylastname@gmcl.com> - 2011-04-29 09:32 -0600
        Re: Saving data billg999@cs.uofs.edu (Bill Gunshannon) - 2011-04-29 15:54 +0000
          Re: Saving data Steven Schweda <sms.antinode@gmail.com> - 2011-04-29 09:04 -0700
            Re: Saving data Paul Sture <paul.nospam@sture.ch> - 2011-04-29 18:52 +0200
          Re: Saving data Alan Fay <alan_fay@symantec.com> - 2011-04-30 15:01 -0700
            Re: Saving data billg999@cs.uofs.edu (Bill Gunshannon) - 2011-04-30 23:57 +0000
              Re: Saving data glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2011-05-01 00:39 +0000
                Re: Saving data BillPedersen <pedersen@ccsscorp.com> - 2011-04-30 18:06 -0700
                Re: Saving data Johnny Billquist <bqt@softjar.se> - 2011-04-30 21:28 -0700
                Re: Saving data glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2011-05-01 05:36 +0000
              Re: Saving data JF Mezei <jfmezei.spamnot@vaxination.ca> - 2011-04-30 21:23 -0400
                Re: Saving data Johnny Billquist <bqt@softjar.se> - 2011-04-30 21:31 -0700
                Re: Saving data glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2011-05-01 05:38 +0000
                Re: Saving data Johnny Billquist <bqt@softjar.se> - 2011-04-30 22:58 -0700
                Re: Saving data "Martin Vorlaender" <mv@pdv-systeme.de> - 2011-05-01 11:50 +0200
                Re: Saving data koehler@eisner.nospam.encompasserve.org (Bob Koehler) - 2011-05-02 09:52 -0500
                Re: Saving data Paul Sture <paul.nospam@sture.ch> - 2011-05-01 17:28 +0200
                Re: Saving data glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2011-05-01 21:23 +0000
                Re: Saving data helbig@astro.multiCLOTHESvax.de (Phillip Helbig---undress to reply) - 2011-05-01 16:45 +0000
                Re: Saving data koehler@eisner.nospam.encompasserve.org (Bob Koehler) - 2011-05-02 09:47 -0500
              Re: Saving data Steven Schweda <sms.antinode@gmail.com> - 2011-04-30 19:40 -0700
              Re: Saving data helbig@astro.multiCLOTHESvax.de (Phillip Helbig---undress to reply) - 2011-05-01 16:43 +0000
                Re: Saving data koehler@eisner.nospam.encompasserve.org (Bob Koehler) - 2011-05-02 09:53 -0500
                Re: Saving data glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2011-05-02 17:35 +0000
            Re: Saving data Steven Schweda <sms.antinode@gmail.com> - 2011-04-30 19:23 -0700
              Re: Saving data Paul Sture <paul.nospam@sture.ch> - 2011-05-01 17:24 +0200
    Re: Saving data glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2011-04-29 17:50 +0000
      Re: Saving data Simon Clubley <clubley@remove_me.eisner.decus.org-Earth.UFP> - 2011-04-29 18:49 +0000
        Re: Saving data glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2011-04-29 21:08 +0000
          Re: Saving data Steven Schweda <sms.antinode@gmail.com> - 2011-04-29 15:00 -0700
            Re: Saving data glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2011-04-29 22:31 +0000
            Re: Saving data Paul Sture <paul.nospam@sture.ch> - 2011-04-30 15:49 +0200
      Re: Saving data Steven Schweda <sms.antinode@gmail.com> - 2011-04-29 15:15 -0700
  Re: Saving data chrisj.doran@proemail.co.uk - 2011-04-29 07:08 -0700
    Re: Saving data billg999@cs.uofs.edu (Bill Gunshannon) - 2011-04-29 14:39 +0000
      Re: Saving data chrisj.doran@proemail.co.uk - 2011-04-29 07:47 -0700
        Re: Saving data Steven Schweda <sms.antinode@gmail.com> - 2011-04-29 08:00 -0700
      Re: Saving data Ken Fairfield <ken.fairfield@gmail.com> - 2011-04-29 08:05 -0700
        Re: Saving data Steven Schweda <sms.antinode@gmail.com> - 2011-04-29 08:13 -0700
      Re: Saving data Paul Sture <paul.nospam@sture.ch> - 2011-04-29 17:59 +0200
  Re: Saving data Steven Schweda <sms.antinode@gmail.com> - 2011-04-29 07:35 -0700
    Re: Saving data billg999@cs.uofs.edu (Bill Gunshannon) - 2011-04-29 15:13 +0000
      Re: Saving data Steven Schweda <sms.antinode@gmail.com> - 2011-04-29 08:36 -0700
      Re: Saving data Rob Brown <mylastname@gmcl.com> - 2011-04-29 10:03 -0600
  Re: Saving data JF Mezei <jfmezei.spamnot@vaxination.ca> - 2011-04-29 10:55 -0400
    Re: Saving data billg999@cs.uofs.edu (Bill Gunshannon) - 2011-04-29 15:16 +0000
      Re: Saving data Jan-Erik Soderholm <jan-erik.soderholm@telia.com> - 2011-04-29 17:33 +0200
        Re: Saving data Steven Schweda <sms.antinode@gmail.com> - 2011-04-29 08:44 -0700
          Re: Saving data Jan-Erik Soderholm <jan-erik.soderholm@telia.com> - 2011-04-29 17:49 +0200
            Re: Saving data Steven Schweda <sms.antinode@gmail.com> - 2011-04-29 09:09 -0700
        Re: Saving data billg999@cs.uofs.edu (Bill Gunshannon) - 2011-04-29 16:02 +0000
          Re: Saving data Jan-Erik Soderholm <jan-erik.soderholm@telia.com> - 2011-04-29 19:26 +0200
            Re: Saving data billg999@cs.uofs.edu (Bill Gunshannon) - 2011-04-29 17:44 +0000
              Re: Saving data Ken Fairfield <ken.fairfield@gmail.com> - 2011-04-29 12:30 -0700
              Re: Saving data Jan-Erik Soderholm <jan-erik.soderholm@telia.com> - 2011-04-30 00:31 +0200
      Re: Saving data jbriggs444 <jbriggs444@gmail.com> - 2011-04-29 08:38 -0700
        Re: Saving data billg999@cs.uofs.edu (Bill Gunshannon) - 2011-04-29 16:06 +0000
          Re: Saving data Steven Schweda <sms.antinode@gmail.com> - 2011-04-29 09:18 -0700
          Re: Saving data Ken Fairfield <ken.fairfield@gmail.com> - 2011-04-29 12:18 -0700
      Re: Saving data Steven Schweda <sms.antinode@gmail.com> - 2011-04-29 08:48 -0700
    Re: Saving data helbig@astro.multiCLOTHESvax.de (Phillip Helbig---undress to reply) - 2011-04-29 15:50 +0000
  Re: Saving data helbig@astro.multiCLOTHESvax.de (Phillip Helbig---undress to reply) - 2011-04-29 15:49 +0000
  Re: Saving data Keith Parris <keithparris_deletethis@yahoo.com> - 2011-04-29 13:35 -0600
    Re: Saving data Rich Jordan <jordan@ccs4vms.com> - 2011-04-29 13:16 -0700
      Re: Saving data Steven Schweda <sms.antinode@gmail.com> - 2011-04-29 14:49 -0700
        Re: Saving data JF Mezei <jfmezei.spamnot@vaxination.ca> - 2011-04-29 19:41 -0400
    Re: Saving data Steven Schweda <sms.antinode@gmail.com> - 2011-04-29 14:36 -0700
      Re: Saving data Ken Fairfield <ken.fairfield@gmail.com> - 2011-04-29 15:19 -0700
  Re: Saving data "Richard B. Gilbert" <rgilbert88@comcast.net> - 2011-04-29 20:35 -0400

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