If all the listeners ANALYSIS fails

Hi Experts,

Listeners AFIK SCAN redirects incoming client connections to local listeners.

If a single ANALYSIS fails over to node SCAN o failure fail to other live nodes

What happens if all SCAN listeners breaks down at the SAME TIME. (Imagine)

Are incoming connections fails until the restored services or another way possible?


--
Thanks in advance
Vijay

887400 wrote:
Hello

By reading this document SCAN, I had this question.

OK now.

Let's say that. I 2node default RAC has 3 listeners SCAN

Node 1 has 2 SCAN listeners and node 2.

If node 1 fails, then ANALYSIS listeners on that node fail over to node 2.

Node2 hosts now all three Auditors SCAN. When the 1 NŒUD returns 2 SCAN listeners will fail to node 1.

Please correct me if I'm wrong.

Your interpretation is correct...
In the case of 2-node rac system, having two scna listener running in a single node is the behavior expected and supported under normal circumstances. (because oracle is recommended to use 3 SCAN ips even if its 2 node rac).
And Yes when node 1 fails, then the resources of VIP SCAN and SCAN listener will failover to the rest of i.e node 2. And when node 2 is restored again, and then again VIP SCAN and SCAN listener will move to it.

Please see following the lines of > http://www.oracle.com/technetwork/database/clustering/overview/scan-129069.pdf
"In this case, a cluster nodes-2-is used (for which 3 IPs are always recommended for simplicity), a server in the.
cluster will host two sets of resource ANALYSIS in respect of normal operations. If the node running a VIP SCAN fails,
the VIP SCAN and its associated listener are failed over to another node in the cluster. If using such a failure of the
number of servers in the cluster becomes less than three, only one server will host still two sets of SCAN
resources. If a node is available again in the cluster, the formerly mentioned dispersion will be implemented and
move a game accordingly. »

Published by: 909592 on April 9, 2012 13:18

Tags: Database

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