I'd like to add two things: 1. Many platforms require their clusterware to support their cluster filesystem. So, in many cases, if you want a cluster filesystem, you'll need their clusterware to support it. 2. Some admins object to the way that Oracle Clusterware does fencing (STONITH). I think that some of the product pitches offered by the third-party clusterware vendors pick on this point as some sort of weakness in Oracle Clusterware. Regardless of anyone's opinion, some admins choose the third-party product because of this difference. Those plus what Niall mentioned are the only decent (well, #2 is up for debate as a "decent" reason...) reasons I've heard. The main count against using third party clusterware IMO is the additional complexity of adding more non-Oracle software to an already complex software stack. Dan -----Original Message----- From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of hrishy Sent: Wednesday, January 16, 2008 12:10 PM To: Niall Litchfield Cc: oracle-l@xxxxxxxxxxxxx Subject: Re: Advantage of ThirdParty Cluster over Oracle Supplied Free one Hi Niall Well i really doubt these kind of reasons do work in Multi-Million Dollar organisations where we need to be objective in our assesment. regards Hrishy --- Niall Litchfield <niall.litchfield@xxxxxxxxx> wrote: > It's been around a while. > It's general purpose. > It can be quicker to failover etc. > Your sysadmins may already know it well.