Hi Christian,

Thanks for your reply.

With mysql master/master i meant the following: http://mysql-mmm.org/ but it 
seems they are using 2 different locations for mysql reads and writes. 
Something nova is (yet) not able to configure (i.e. --sql_connection= which is 
being used for reads and rights.)

Maybe http://www.mysql.com/products/cluster/ is a better way..

RabbitMQ HA i am aware of. This is something we are looking at as well.

The main question is how does other companies reach HA with openstack? I can't 
find any good information on the net about it.
And how does Essex change things?

Best regards,

Tristan van Bokkem
Datacenter Operations

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From: Christian Berendt [mailto:bere...@b1-systems.de]
To: i3D.net - Tristan van Bokkem [mailto:tristanvanbok...@i3d.nl]
Cc: openstack@lists.launchpad.net
Sent: Tue, 14 Feb 2012 11:54:38 +0100
Subject: Re: [Openstack] Howto Nova setup with HA?

Hi Tristan.
  > So, we can run MySQL in master-master mode on multiple hosts, we can
  > run nova-api on serveral hosts and load balance those and RabbitMQ
  > has a cluster ha setup as well but is this the way to go? I can't
  > find a clear answer to this. I am hoping one can shine some light on
  > this!
  I would prefer to use MySQL Cluster:
  http://www.mysql.com/products/cluster/. You meant that with MySQL
  For RabbitMQ there are several ways to setup it:
  I think the customer site has to decide which HA setup they want use.
  All types have advantages and disadvantages.
  HTH, Christian.
  Christian Berendt
  Linux / Unix Consultant & Developer
  Mail: bere...@b1-systems.de
  B1 Systems GmbH
  Osterfeldstraße 7 / 85088 Vohburg / http://www.b1-systems.de
  GF: Ralph Dehner / Unternehmenssitz: Vohburg / AG: Ingolstadt,HRB 3537
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