diff options
author | Mark Murray <markm@FreeBSD.org> | 1995-11-17 19:03:48 +0000 |
---|---|---|
committer | Mark Murray <markm@FreeBSD.org> | 1995-11-17 19:03:48 +0000 |
commit | e526d43c6e8278cae780482cf649872b7a0d1639 (patch) | |
tree | 6a3b62197df267fc94962ede462615ef061483ab | |
parent | Add NO_MTREE=yes. (diff) |
Add a stunningly useful utility.
if you ever nhave needed to do something like:
tar cf - <big_dir> | rsh cat > /dev/tape then you will appreciate this.
do something like
tar cf - <big_dir> | buffer | rsh othersys "cat | buffer > /dev/tape"
to enjoy HUGE increases in speed while your tape drive does not
incessantly back/forth/stop/start.
Notes
Notes:
svn path=/head/; revision=2430
-rw-r--r-- | misc/buffer/Makefile | 19 | ||||
-rw-r--r-- | misc/buffer/distinfo | 1 | ||||
-rw-r--r-- | misc/buffer/pkg-comment | 1 | ||||
-rw-r--r-- | misc/buffer/pkg-descr | 27 | ||||
-rw-r--r-- | misc/buffer/pkg-plist | 3 |
5 files changed, 51 insertions, 0 deletions
diff --git a/misc/buffer/Makefile b/misc/buffer/Makefile new file mode 100644 index 000000000000..5c9f9776864a --- /dev/null +++ b/misc/buffer/Makefile @@ -0,0 +1,19 @@ +# New ports collection makefile for: buffer +# Version required: 1.17 +# Date created: 17 Nov 1995 +# Whom: markm +# +# $Id$ +# + +DISTNAME= buffer-1.17 +CATEGORIES+= utilities +MASTER_SITES= ftp://ftp.sun.ac.za/pub/unix/ +NO_WRKSUBDIR= yes + +post-install: +.if !defined(NOMANCOMPRESS) + gzip -9nf ${PREFIX}/man/manl/buffer.l +.endif + +.include <bsd.port.mk> diff --git a/misc/buffer/distinfo b/misc/buffer/distinfo new file mode 100644 index 000000000000..7fc3aa45b303 --- /dev/null +++ b/misc/buffer/distinfo @@ -0,0 +1 @@ +MD5 (buffer-1.17.tar.gz) = 6c5236ed99f4df0832623f4c0498c681 diff --git a/misc/buffer/pkg-comment b/misc/buffer/pkg-comment new file mode 100644 index 000000000000..dddb0d3bcf57 --- /dev/null +++ b/misc/buffer/pkg-comment @@ -0,0 +1 @@ +buffer sporadic binary I/O for faster tape use diff --git a/misc/buffer/pkg-descr b/misc/buffer/pkg-descr new file mode 100644 index 000000000000..c5c68ac64335 --- /dev/null +++ b/misc/buffer/pkg-descr @@ -0,0 +1,27 @@ +This is a program designed to speed up writing tapes on remote tape +drives. Requirements are shared memory and locks which normally +means that these are supported in your kernel. + +[for FreeBSD, this means you MUST have a kernel with + options SYSVSHM + compiled in - markm] + +Buffer has been tested under SunOS 4.0.*, SunOS 4.1.*, Solarix, HP-UX 7.0, +and Gould UTX 2.1A (sv universe). + +The program splits itself into two processes. The first process reads +(and reblocks) from stdin into a shared memory buffer. The second +writes from the shared memory buffer to stdout. Doing it this way +means that the writing side effectly sits in a tight write loop and +doesn't have to wait for input. Similarly for the input side. It is +this waiting that slows down other reblocking processes, like dd. + +I run an archive and need to write large chunks out to tape regularly +with an ethernet in the way. Using 'buffer' in a command like: + + tar cvf - stuff | rsh somebox "buffer > /dev/rst8" + +is a factor of 5 faster than the best alternative, gnu tar with its +remote tape option: + + tar cvf somebox:/dev/rst8 stuff diff --git a/misc/buffer/pkg-plist b/misc/buffer/pkg-plist new file mode 100644 index 000000000000..0851730727aa --- /dev/null +++ b/misc/buffer/pkg-plist @@ -0,0 +1,3 @@ +@cwd /usr/local +bin/buffer +man/manl/buffer.l.gz |