> Gurus,
please dont address mails to a certain elite class of people leaving out
the others... its rude!
>
> I have 2 GB file on unix/linux.
firstly, its bad programming to make a program produce a 2gb file
output. so IMHO u shud throw that program out!!! in effect, u reduce
performance of the system. this idea is an exhisting programming riddle,
but most programmers avoid getting into this situation by making a
number of small files. then its not that stupid to backup a file of say
1mb. anyways... lets continue..
>
> I want to take back up (or replicate) of this file as soon as there is any change in
>this file.
> If we use incremental back up, it will take bake up of all 2 GB file size for a
>single word change.
youre rite there!!!!
>
> Q1 - Is there any solution in your mind, which will collecte only change byte (or
>blocks of say 1KB) and duplicate on back up server ?
actually... no!
this is a problem with the file system... in the present day filesystems
(fat,ext2) a file is taken as the smallest constituent of the fs.... not
a byte(bytes are treated like a black box).... so ineffect... if we want
to change just a byte in a file... we wud require the sallest
constituent to be a byte!!! so the only solution is to make a filesystem
of your own just for backing up stuff!!!!
you could call it (b)fs.
>
> Q2 :- What are the products (commercial and non-commercial like unix utilities)
>support back up of Open files (application) ???
now thats a question for the gurus!!!!!
> I hope, i didn't ask a tough question.
not at all!!!!
Neil
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