[ZODB-Dev] Clustering ZEO Server with drbd
Christian Theune
ct at gocept.com
Mon May 29 11:45:44 EDT 2006
garthpl at periweb.com wrote:
> Hi folks, I'm looking at making a scalable zope infrastructure, I can
> scale the ZEO clients and mysql, the only issue is the ZEO server. I
> have used drbd and heartbeat in the past to create a HA lamp stack. From
> a technical standpoint, is there any reason I could not use drbd to
> cluster the ZEO server? Any thoughts would be appreciated.
As far as I understand, the difference to ZRS (which is a solution to
scale ZEO servers, e.g. for HA) that you will need to restart the ZEO
server when switching a hot-spare ZEO server to "live-mode", because it
doesn't notice when the underlying storage file is changed by somebody else.
Christian
--
gocept gmbh & co. kg - forsterstraße 29 - 06112 halle/saale - germany
www.gocept.com - ct at gocept.com - phone +49 345 122 9889 7 -
fax +49 345 122 9889 1 - zope and plone consulting and development
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