[Xen-users] Alternatives to a dual-primary DRBD setup

[Daniel Meszaros <meszi@xxxxxxxxxxx>]

Hi there,

usually I am just lurking around here collecting ideas about issues that 
I could run into in the future but now it seems my time has come to ask 
for your help...
Until now I ran a Citrix Xenserver 5.6 on a dual-primary DRBD setup. But 
for any reason I am experiencing sync problems now, maybe due to the 
raised I/O load (setup without guest machines, now ten virtual servers).
I am tapping a bit in darkness at searching for the needle in the 
haystack causing the problems. Therefore I am thinking about possible 
alternatives that allow useful things like XenMotion but possibly at a 
lower performance usage level.
My current setup:
- two servers with dual 12-core Opterons and 32 GB RAM, each
- each server equipped with a 500 MB (hardware) RAID1 for the host and 
with a 14 TB (hardware) RAID5 for the guests that's being replicated 
using DRBD
- each server with a 10 GbE NIC
- Citrix Xenserver 5.6, both running in one pool

What are your ideas? Is it worth thinking about other storage solutions?

CU,
Mészi.

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