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Re: [Help-tar] tar + lbzip2 proposal
From: |
ERSEK Laszlo |
Subject: |
Re: [Help-tar] tar + lbzip2 proposal |
Date: |
Tue, 6 Oct 2009 21:41:41 +0200 (CEST) |
On Tue, 6 Oct 2009, Sergey Poznyakoff wrote:
Hi Laszlo,
The proposal is interesting, but the basic question is: does lbzip2
offer the same functionality as bzip2?
It doesn't. lbzip2 isn't a drop-in replacement for bzip2 (and as far as I
can tell, it never will be).
Cheers,
lacos
$ lbzip2 -h
lbzip2: Parallel bzip2 filter.
Copyright (C) 2008, 2009 Laszlo Ersek. Released under the GNU GPLv2+.
Version 0.15.
Usage:
1. lbzip2 [-d] [-n WORKER-THREADS] [-v] [-t]
2. lbzip2 -h
Options:
-d : Decompress.
-n WORKER-THREADS : Set number of (de)compressor threads to
WORKER-THREADS. WORKER-THREADS must be in
[1, 1073741823]. If this option is not specified, the
environment variable LBZIP2_WORKER_THREADS is
consulted. If LBZIP2_WORKER_THREADS is unset or empty,
lbzip2 queries the system for the number of
online processors.
-v : Print condition variable statistics in the end.
If this option is not specified, the
environment variable LBZIP2_PRINT_STATS
is consulted: statistics will be printed if and
only if LBZIP2_PRINT_STATS has a non-empty value.
-t : Print memory allocation trace. If this option
is not specified, the environment variable
LBZIP2_TRACE_ALLOC is consulted: allocation trace will be
printed if and only if LBZIP2_TRACE_ALLOC has a non-empty
value. Check trace with "malloc_trace.pl".
-h : Print this help and exit successfully.