[DRBD-user] Initializing shortcut

Luciano Miguel Ferreira Rocha strange at nsk.no-ip.org
Wed May 10 19:39:40 CEST 2006

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

On Wed, May 10, 2006 at 10:22:54AM -0700, Martin Fick wrote:
> > > > form a cluster, so you have existing filesystems
> > > > with important data on it?  is it ok to skip the
> > > > initial sync there, too?
> If drbd has never been there, than there is nothing to
> lose right?  At least nothing more than with syncing
> right?
> Maybe I don't understand the scenario you are
> describing?  Is the intial single server data already
> on a single side drdb partition, or is it on another
> non drbd partition?

You don't understand the scenario. You already have a working server,
without drbd, and decide to add drbd to it:

1. a) create metadata partition 
1. b) resize filesystem to give space to metadata

2. tell drbd the device is consistent.

-> new drbd device, without data loss (and without having to create new
partition, set drbd on it, migrate data to new drd device).

> > with a fast link, I typically see the drbd initial
> > full sync finish slightly faster than dd would.
> Now I don't understand that, how is that possible?  Is
> it because drbd is running in kernel space?

Probably because he's dd'ing sector by sector, that is, by default, 512

I usually define a bs of 1M or more.

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