classiccmp server hardware

From: der Mouse <mouse_at_Rodents.Montreal.QC.CA>
Date: Tue Oct 12 21:08:20 2004

>> I have "live" mirroring of my disks - all disk writes are mirrored
>> over the net in real time to [backup images elsewhere].
> Just out of curiousity... Is this done on a file by file basis [i.e.
> if the file is changed, the file is copied...], or some other more
> granular means?

Disk-block granularity. It's done with hooks in the disk drivers; it's
completely filesystem-blind.

> I ask because most of my data operations involve many relatively
> small writes to varying sections of very large files.

If it involves writing to few disk blocks, it would mean little data
copied over the net under my scheme.

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Received on Tue Oct 12 2004 - 21:08:20 BST