This was a nice explanation, since I'm a newbie in RAC...:))) Please, let me ask some help for a problem I'm facing with: one (or more?, it has been some weeks ago...) RAC node crashed and the other took its VIP; now I'd like to start the crashed node but it fails, obviously since the VIP depending nodeapp cannot start... I'm waiting my management to activate a Metalink support, but is there something I can do to in the meanwhile? Many thanks, Alessandro ---------- Initial Header ----------- From : oracle-l-bounce@xxxxxxxxxxxxx To : oracledbaquestions@xxxxxxxxx Cc : oracle-l@xxxxxxxxxxxxx Date : Thu, 10 Jul 2008 09:15:41 -0500 Subject : Re: Oracle RAC and VIPs >The basic gist is this: > The VIP is a cluster resource managed by the clusterware. Depending on >your OS , you can see it running as a VIP under your public network NIC. >(ifconfig -a on Linux). What happens in a node failure is that the >clusterware brings that VIP resource up on another node so that when clients >attempt connects to that IP, the 'failure' is detected right away and the >client can use the next address in the tnsnames.ora entry (or jdbc url, or >whatever). > >Try it out sometime. take a node node, use srvctl to see where the vips are >running and look at the ifconfig to see as well. > >On Thu, Jul 10, 2008 at 8:30 AM, Dba DBA <oracledbaquestions@xxxxxxxxx> >wrote: > >> I have installed Rac. I know how to create a VIP. I don't understand why >> this works. I also don't undertsand why TAF works. >> >> I am connected to node 1, how am I on the fly connected to node 2 if node 1 >> goes down. >> >> Again, I know the functionality, I just don't know how it works under the >> covers. >> >> Can anyone help me out with this? >> > > > >-- >Bradd Piontek >Twitter: http://www.twitter.com/piontekdd >Oracle Blog: http://piontekdd.blogspot.com >Linked In: http://www.linkedin.com/in/piontekdd >Last.fm: http://www.last.fm/user/piontekdd/ > -- //www.freelists.org/webpage/oracle-l