Re: tar dumps, performance
2007-08-08 10:55:47
On Wed, Aug 08, 2007 at 09:10:58AM -0500, Dustin J. Mitchell wrote:
> On Wed, Aug 08, 2007 at 09:09:50AM -0400, Brian Cuttler wrote:
> > What really happens when GTAR INDEXING is enabled ?
>
> Briefly, the client 'tees' the tar output to another invocation of tar
> with the -t (table of contents) option, which lists each file in the
> dump, one per line. That information is sent to the server in a stream
> parallel to the data stream, where the dumper writes it to the gnu-tar
> index files directory, possibly compressing it first.
>
I would not expect indexing to have a significant impact
on backup time. But I've been wrong before :(
jl
--
Jon H. LaBadie jon AT jgcomp DOT com
JG Computing
4455 Province Line Road (609) 252-0159
Princeton, NJ 08540-4322 (609) 683-7220 (fax)
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