RE: Node in a 2 cluster RAC environment keeps failing over
- From: Scott <oraracdba@xxxxxxxxx>
- To: oracle-l@xxxxxxxxxxxxx
- Date: Fri, 19 Mar 2004 17:22:25 -0800 (PST)
Laura, My understanding per Veritas is that this is
not best practice. Veritas round robins through the
cards and the slower card could cause problems.
I have implemented Vertias successfully but no site I
have done has had different card speeds. I did one
site with 2 1G cards and 1 100Mb card and we had
problems. They remove the slower card and the problems
went away.
I have seen some Veritas bulletins on disabling
fastpath but I don't remember under what conditions.
This may have been it but I don't recall.
Scott
--- laura pena <lizzpenaorclgrp@xxxxxxxxx> wrote:
> Wow someone who has heard of this.
>
> Yes, we have our interconnects set to etherfp.
> LLT link information:
> Link Tag State Type Pri SAP MTU
> Addrlen
> Xmit Recv Err
> LateHB
> Broadcast
> 0 eri0 on etherfp hipri
> 0xCAFE 1500 6
> 261840450 240300348 0
> 89
> FF:FF:FF:FF:FF:FF
> 1 ce1 on etherfp hipri
> 0xCAFE 1500 6
> 261914713 240332338 0
> 91
> FF:FF:FF:FF:FF:FF
>
> we have 2 interconnects but they are of differnts
> speeds:
> set-node VLDBN1
> set-cluster 10
> link eri0 /dev/eri:0 - ether - -
> link ce1 /dev/ce:1 - ether - -
>
> I believe ce1 is the 2 gigabit
> and eri0 is the 100M
>
>
> This setting was done by our SA. We do have a ce0
> which is another 2 gigabit, but our SA wants to
> leave this for public connection. Do have a similar
> setup?
>
>
> So if I understand we should try setting
> set-nofastpath 1 in our /etc/llttab so it will use
> the slower connection to perform a heartbeat check?
>
>
> Thanks so much for responding.
>
>
> -Lizz
>
>
>
>
>
> Lee Jenkins <lee.jenkins@xxxxxxxxxxxxxxx> wrote:
> Hi Lizz,
>
>
> I posted this response on oracle-l, but it doesn't
> seem to have appeared.
> On a customer of ours 3 node cluster VCS v3.5
> (HP-UX), we had to set "set-nofastpath 1" in
> /etc/llttab so as to force the heartbeat to operate
> at 100Mhz. Have you got 2 heart beat interconnects?
> i.e. redundancy?
>
> You can get stats by running lltstat, which shows
> data volumes and errors.
> You can run lltstat -l to check the setting of
> fastpath. "ether" means fastpath is disabled,
> "etherfp" means enabled.
> Regards,
> Lee
>
>
> Lee Jenkins
> RemoteDBA
> www.remotedba.co.za
> Tel: 011 447 0533
> Fax: 011 447 0533
> Cell: 083 408 0857
>
>
>
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