[DRBD-user] Adding a third node

Aaron Johnson aaronjohnson at ajserver.com
Wed Sep 25 23:21:36 CEST 2013

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

Yes you can add the stacked resource later, I have done this same thing several times now by making the the device slightly larger first and using internal metadata.

Also I have a DR site using protocol C and pull-ahead enabled without using DRBD proxy.  The main site and DR site are connected via cable modem connections (10Mbit up/ 20 down both sides).  The only thing I have troubles with is if I need to add a large amount of data (50+ GB), which in my case is fairly rare (daily norm is ~2GB), then it can take days or weeks to sync up fully again.  Also I used truck-based updates for the initial setup of ~1TB to avoid having to pull all that over the internet link.


> On Sep 25, 2013, at 7:54 AM, Lionel Sausin <ls at numerigraphe.com> wrote:
> Le 25/09/2013 08:10, roberto.fastec at gmail.com a écrit :
>> The purpose you are talking about, sounds more as the purpose DRBD Proxy has been developed for
>> www.linbit.com/en/products-and-services/drbd-proxy
> Yes and no, my understanding is that DRBD-proxy lets your production cluster run faster than the connection speed by acting like a write cache.
> But if I'm not mistaken you still need a stacked configuration for 3 node setups until v9.0 is released.
> Someone please correct me if that's wrong of course.
> Lionel Sausin
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