can anyone help Post: 5894

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Top Forums UNIX for Advanced & Expert Users can anyone help Post 5894 by Kelam_Magnus on Saturday 25th of August 2001 03:33:55 PM

08-25-2001

Registered User

EricB,

You probably know this, but I will mention it anyway.

When you compress, in most cases, you get around 80% compression. While this will save space on your tapes, it will also slow down recovery from the tape should that be necessary.

If this is data that is being archived for long term storage, then your need to compress would be a valid one.

Just remember, the more you do to the data to get it onto the tape, the longer it will take you to get it off of the tape later.

Also, you may want to look at "gzip" as well. It may get better compression than "compress", if I remember correctly.

Kelam_Magnus

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znew

ZNEW(1) 						      General Commands Manual							   ZNEW(1)

NAME

       znew -	recompress .Z files to .gz files

SYNOPSIS

       znew [ -ftv9PK] [ name.Z ...  ]

DESCRIPTION

       Znew  recompresses  files  from .Z (compress) format to .gz (gzip) format.  If you want to recompress a file already in gzip format, rename
       the file to force a .Z extension then apply znew.

OPTIONS

       -f     Force recompression from .Z to .gz format even if a .gz file already exists.

       -t     Tests the new files before deleting originals.

       -v     Verbose. Display the name and percentage reduction for each file compressed.

       -9     Use the slowest compression method (optimal compression).

       -P     Use pipes for the conversion to reduce disk space usage.

       -K     Keep a .Z file when it is smaller than the .gz file; implies -t.

SEE ALSO

       gzip(1), zmore(1), zdiff(1), zgrep(1), zforce(1), gzexe(1), compress(1)

BUGS

       Znew does not maintain the time stamp with the -P option if cpmod(1) is not available and touch(1) does not support the -r option.

																	   ZNEW(1)