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Home > Archive > Unix administration > September 2004 > tar
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| William S. Perrin 2004-09-29, 3:09 am |
| Anyway to make this go faster?
tar cf - oracle/ | remsh pluto "cd /; tar pvxf -"
Native HPUX tar, cpio can't handle 2GB files.
Could I use bigger BLOCK size??
Thanks
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| Michael Tosch 2004-09-29, 3:09 am |
| In article <415A2C94.90008@lawson.com>, "William S. Perrin" <william.perrin@lawson.com> writes:
> Anyway to make this go faster?
>
> tar cf - oracle/ | remsh pluto "cd /; tar pvxf -"
>
> Native HPUX tar, cpio can't handle 2GB files.
It should. Watch out for a patch.
> Could I use bigger BLOCK size??
No, the pipe will always slice it into smaller blocks.
If your bottleneck is the link ( < 10Mbit/sec ),
then this is faster:
tar cf - oracle | gzip -c | remsh pluto "cd /; gunzip -c | tar pxf -"
(if you dont have gzip/gunzip: try compress/uncompress.)
--
Michael Tosch
IT Specialist
HP Managed Services
Technology Solutions Group
Hewlett-Packard GmbH
Phone: +49 2407 575 313
Mail: michael.tosch:hp.com
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| Stephane CHAZELAS 2004-09-29, 3:09 am |
| 2004-09-28, 22:31(-05), William S. Perrin:
> Anyway to make this go faster?
>
> tar cf - oracle/ | remsh pluto "cd /; tar pvxf -"
If the bottleneck is on the network bandwidth, try with:
tar cf - oracle | gzip -3 | remsh pluto "cd / && gzip -d | tar pxf -"
> Native HPUX tar, cpio can't handle 2GB files.
> Could I use bigger BLOCK size??
[...]
It won't help.
Try installing GNU or Heirloom toolchest tar.
Also look if there's a pax command on your system that is
largefile aware.
--
Stephane
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| Doug Freyburger 2004-09-29, 8:09 pm |
| William S. Perrin wrote:
>
> Anyway to make this go faster?
> tar cf - oracle/ | remsh pluto "cd /; tar pvxf -"
> Native HPUX tar, cpio can't handle 2GB files.
Dump and restore can handle large files, and they run slightly
faster than tar. Others have mentioned gzip to compress the
data stream, that should be a "z" in the tar command once you
switch from the HPUX native one to the GNU one.
> Could I use bigger BLOCK size??
There's a pipe in your command. Pipes are inherently
unblocked. Your question is meaningless in this context.
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