Thanks Ram/Riyaj. Yes I understand it is two cluster software running at same time (that's why i don't like the idea of VCS+CRS); I am also reading a doc here http://www.sun.com/blueprints/0105/819-1466.pdftalking about the benefit of running Sun Cluster over RAC+CRS; (Charpter 4); it mentioned some advantage of like using Sun cluster overcomes the limitation of IPMP to do HA for interconnect, and more robust cluster memmber ship/fencing; It sounds reasonable during high load cases the sun cluster might able to handle better than oracle CRS; Anyone experienced the IPMP limitation so far (if you also on solaris)? On Thu, Nov 19, 2009 at 8:22 PM, Ram Srinivasan <srinivasanram2004@xxxxxxxxx > wrote: > Hi: > We do have RAC in dev, test and production. Also Veritas is the file > system we are using and not ASM. We actually recommended ASM. But they did > not listen to the DBAs, and went with the Veritas. I think the sysadmins > wanted to have complete control over the file storage system, because some > of them are not familiar with the ASM. Since we have Veritas on top of > 10gR2, we are having lots of issues. Diagnosing the problems is very > difficult. Whenever they bring down the boxes, CRS won't come up, or some > times oracle libraries will over-write Veritas libraries, and the Veritas > may not come up. Sometimes, they disks are connected to the CRS. These > sysadmins take the disks off without disconnecting the disks from the CRS > first, and this would bring down the CRS. They would blame the DBAs, and > the DBAs will have to tell them to disconnect the disks from the CRS first, > etc........ It is a total mess down here. > If you have a choice, go with the ASM. > > Yes. It is the DBA's job to bring up/shutdown CRS, nodeapps services, > instances databases, etc.. The sysadmins will bring up the file systems > only. > > > Thanks. > > Ram Srinivasan > > > On Fri, Nov 13, 2009 at 5:14 AM, Zhu,Chao <zhuchao@xxxxxxxxx> wrote: > >> hi Guys >> We were doing POC for RAC(sorry we are very late in technology >> deployment and indeed we don't have strong need for RAC so far as we split >> database when server running out of capacity) and our storage guys insists >> on using Veritas Cluster (guess VCS has less learning curve for them?); >> >> To me it does not make sense to use Veritas Cluster software as oracle >> is merging all cluster management to its CRS and it makes easier to manage >> in the longer term, and I believe it is the oracle stategy and also industry >> common practise; >> >> I am writing to to the list to ask for your opinon, and how does your >> company run RAC? Is there any major reason to use third party clusterware >> instead of oracle's own which is free (bundled in RAC optino)? >> Thanks. >> >> -- >> Regards >> Zhu Chao >> www.cnoug.org >> >> > > > -- > Sincerely > Ram Srinivasan > -- Regards Zhu Chao www.cnoug.org