[DRBD-user] Replication over a VLAN between two distant sites ?

Christopher Chen muffaleta at gmail.com
Thu Oct 22 21:06:33 CEST 2009

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

That's a very good question. How far apart are these co-location
centers (latency-wise)?

On Thu, Oct 22, 2009 at 11:51 AM, Matt Graham <danceswithcrows at usa.net> wrote:
> From: "LinuxVault.Eu" <alain at linuxvault.eu>
>> The subject says it all, is DRBD replication possible
>> between two nodes at different geographical locations ?
> We've been doing it for years, and almost all the problems could be
> traced to A) someone unplugging the wrong network cable B) someone
> doing something stupid to drbd.conf.  So, yeah.
>> I can co-locate two servers in two datacenters with a
>> private VLAN for replication between both, is this a
>> sound solution or is RTD a big issue ?
> EXPN "RTD", plz, kthx?  Er... it works well between 2 datacenters
> that are about 20 miles apart.  The ~1ms latency combined with
> protocol C means writes are slower than they would be if the boxes
> were right next to each other.  Sustained speeds are about 35M/s.
> I spent days fooling with many settings in drbd.conf and couldn't
> find any way to get any statistically significant improvement on
> that.
> --
> Matt G / Dances With Crows
> The Crow202 Blog:  http://crow202.org/wordpress/
> There is no Darkness in Eternity/But only Light too dim for us to see
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Chris Chen <muffaleta at gmail.com>
"The fact that yours is better than anyone else's
is not a guarantee that it's any good."
-- Seen on a wall

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