Re: [suse-oracle] SUSE Clustering, Oracle and SAP

It don't make much difference - even if someone striped the stuff, it can be 
installeld back easily.

>>> Alexei,
>
> Hi, sorry to correct you Alexei, since SLES11, the "clustering stuff"
> was stripped from SLES base and is part of an addon product now...
> "High Availability Extension". You can download SLES11SP1 and HAE to
> use without cost, but as I understand it, you need to pay an extra to
> have support for HAE in addition to paying for SLES11 support.

Support is really a good thing for HA systems. There is a HUGE number of 
factors you should consider when building them (I spent about 2 weeks 
getting together dell ilmi fenciong, sdb fencing, making it work if server 
lost all power, making it work on vmware etc. So we have a STANDARD CentOS 
cluster now, and has standard OpenSuSe cluster. But it really TOOK TIME to 
R&D them, and a lot of testing.). But it should be more _consulting support_ 
and not so much _HA components support_.

Common mistake  - if you add HA stack into the system , it not always 
increase reliability becasue HA component can fail too. HA systems are 
oftenn even less reliable then non HA systems (what they always improve is 
maintaining hardware).




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