Re: failover without shutting down sap
From: Doug O'Leary (dkoleary_at_olearycomputers.com)
Date: 06/21/05
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Date: Tue, 21 Jun 2005 05:30:01 -0700
On 2005-06-21, hosea.basis@gmail.com <hosea.basis@gmail.com> wrote:
>
>
> Hi.
>
> I have 2 nodes and a package. Below is my output
>
> CLUSTER STATUS
> mycluster up
>
> NODE STATUS STATE
> sap_prd up running
>
> Network_Parameters:
> INTERFACE STATUS PATH NAME
> PRIMARY up 0/3/0/0 lan1
> PRIMARY up 0/0/0/0 lan0
> STANDBY up 0/6/0/0 lan2
>
> PACKAGE STATUS STATE AUTO_RUN NODE
> cipkg up running enabled sap_prd
>
> Policy_Parameters:
> POLICY_NAME CONFIGURED_VALUE
> Failover configured_node
> Failback manual
>
> Script_Parameters:
> ITEM STATUS MAX_RESTARTS RESTARTS NAME
> Service uninitia 0 0 nfs.monitor
> Subnet up mymonitor
>
> Node_Switching_Parameters:
> NODE_TYPE STATUS SWITCHING NAME
> Primary up enabled sap_prd (current)
> Alternate up enabled sap_dev
>
> NODE STATUS STATE
> sap_dev up running
>
> Network_Parameters:
> INTERFACE STATUS PATH NAME
> PRIMARY up 0/2/0/0 lan1
> PRIMARY up 0/0/0/0 lan0
> STANDBY up 0/6/0/0 lan2
>
>
> Now, when i do a failover of cipkg from sap_prd to sap_dev, do i need
> to shutdown the sap_dev instance? The development instance has its own
> local set of filesystem. Therefore, when failover, my sap_prd should
> not interfere the sap_dev filesystem.
>
> Please advise.
Hey;
Unless I'm missing it, I don't see a sap_dev "instance" running. From
that output, it looks like you have an active/passive environment
in which package cipkg is running on sap_prd and uses sap_dev as a
failover node. Unless you mean there's a SAP instance running on
sap_dev outside of MCSG.
There are two concerns: First, ensure none of the filesystems get
mounted to the same mount point (something you already addressed).
Second, something you won't know until you try it, does the sap_dev
system have sufficient resources to handle running both packages
simultaneously?
Assuming no naming, filesystem, or resource contentions, there should
be nothing stopping you from running two SAP instances on the same
system.
HTH;
-- Doug O'Leary -------- Senior UNIX Admin O'Leary Computer Enterprises dkoleary@olearycomputers.com (w) 630-904-6098 (c) 630-248-2749 resume: http://home.comcast.net/~dkoleary/resume.html
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