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

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Alexei_Roudnev [02.09.2010 21:27]:
> 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).

You're so very right Alexej... It's just sad that OCFS2 was moved into
the HA pack too. When connecting my SAP VMs (SLES 11.1) to the RAC
(running Oracle Linux), we had to use either Veritas FS or OCFS2, and
thus had to buy the HA kit. The only thing we use from this is OCFS2.

Now the systems runs for one week without crashing. Up to now, all the
crashes were due to OCFS2 and its timeouts... Still, there is one VM
that stops in the middle of the backup because OCFS2 is remounted
read-only because of an error :-( This causes some grief, and the boxes
aren't even on HA...

Regards,
Werner

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.15 (GNU/Linux)
Comment: Using GnuPG with SUSE - http://enigmail.mozdev.org/

iEYEARECAAYFAkyIqBsACgkQk33Krq8b42O8EQCfZd2irJ+sUL3fVArOr6TP1d7j
3JQAnj1D406t01+/Ys1f06Qbfa2RxWFP
=gq23
-----END PGP SIGNATURE-----
_______________________________________________
suse-oracle mailing list
[email protected]
http://listx.novell.com/mailman/listinfo/suse-oracle