[DRBD-user] Suggestion for DRBD User's Guide

Florian Haas florian.haas at linbit.com
Tue Mar 11 21:01:50 CET 2008

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

On Tuesday 11 March 2008 20:06:46 Whit Blauvelt wrote:
> Hi,
> In Chapter 5, where it says of the initial full synchronization, "It may
> take some time depending on the size of the device", it might be helpful to
> give some way of estimating what "some time" should be. Let's say the two
> systems are connected by crossover between 1 gig NICs. That must be the
> most common configuration.
> Then is the speed according to the amount of data on the primary, or
> according to the data + empty space there? And what should it be?

Guess why it's called DRBD and not DRFS? It's a block device, not a 
filesystem. It has no concept of "empty space". It always syncs the full 

> My initial impression, having not seen this complete yet, is that this is
> running a lot slower than, say, rsync would in duplicating the same amount
> of data. Doubtless drbd has more to do. Anyway, it would be helpful if the
> manual gave a rough formula for guestimating sync time.

Added to the to-do list. Not sure whether it will be in the changeset for next 
week though.


: Florian G. Haas 
: LINBIT Information Technologies GmbH
: Vivenotgasse 48, A-1120 Vienna, Austria

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