On Lun 27 May 2002 22:28, Cameron Simpson wrote:
> On 17:42 27 May 2002, daniel <[EMAIL PROTECTED]> wrote:
> | say i have a whole bunch of files i wanna tarball weekly (~2gb). i can't
> | back that up to a cd, so the first thought is to have tar compress the
> | whole lot into 650mb chunks. can this be done so that each chunk is a
> | useable fragment? or do i have to reassemble all the pieces in order to
> | extract some data from the combined tarball?
>
> With tar alone, possibly you can use the -L option (see then manual
> entry). This may require some cooperation on your part. And I don't
> know if each component is self contains - it may just be cut up on block
> boundaries, with no respect for file boundaries.
>
> With a small wrapper script, sure.
> Basicly you want something shaped like this:
>
> find ..... list everything to backup ... \
>
> | the-script
>
> where the-script in turn pipes off into a tar which is reads names
> from stdin, lstat()s then to get their size, checks how much biugger
> the tar file would be (1 x 512 byte block, plus file size rounded up
> to 512 byte multiple) and if it won't fit, terminates the current tar
> (close the pipe) and opens a fresh out, with a dialogue to get you to
> change tapes or rename files or enter a new filename or something.
>
> Shouldn't be too hard.
This would work good if there aren't big files to backup, in which case you
could get some backups <<650Mb.
Saludos... :-)
--
Porqué usar una base de datos relacional cualquiera,
si podés usar PostgreSQL?
-----------------------------------------------------------------
Martín Marqués | [EMAIL PROTECTED]
Programador, Administrador, DBA | Centro de Telematica
Universidad Nacional
del Litoral
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