How to Check SCAN Host Name
SCAN Hostname To know the hostname of a SCAN in the cluster, we have some ways to get it. nslookup Given a known SCAN IP,… Read More »How to Check SCAN Host Name
SCAN IP
How to Check SCAN IP Address
SCAN IP Address In a complex environment, you may have some ways to fast check the actual SCAN IP used in the RAC server. nslookup… Read More »How to Check SCAN IP Address
Srvctl Relocate SCAN_LISTENER to Another Node
Rebalance SCAN Resource Theoretically, the cluster distributes all SCAN VIP across all nodes evenly according to some algorithm, but sometimes you would like to relocate… Read More »Srvctl Relocate SCAN_LISTENER to Another Node
How to Resolve CRS-2974 Error Message
CRS-2974: unable to act on resource When we tried to stop SCAN for some reason, we got CRS-2974 like this: [grid@primary01 ~]$ srvctl stop scan… Read More »How to Resolve CRS-2974 Error Message
How Oracle Restart SCAN
You cannot stop SCAN (Single Client Access Name) before stopping SCAN_LISTENER, so if you want to restart SCAN, you have to consider how to handle… Read More »How Oracle Restart SCAN
How to Resolve PRVG-1101 : SCAN name failed to resolve
PRVG-1101 or PRVG-01101 In grid infrastructure installation, OUI expects that SCAN VIP is returned in a round-robin fashion through nslookup the DNS. Without DNS, it… Read More »How to Resolve PRVG-1101 : SCAN name failed to resolve
Setup Only One SCAN VIP
Oracle recommends that you allocate 3 or above SCAN VIP to load balance incoming connections. The more SCAN VIP, the more clients and connections they… Read More »Setup Only One SCAN VIP
How to Relocate SCAN Listener
Sometimes, we may find the scan vip and listeners are all located at one node. [grid@primary01 ~]$ ps -ef | grep lsnr grid … Read More »How to Relocate SCAN Listener
How to Add a SCAN VIP
Preparation 1. Looking up SCAN name on DNS before adding a SCAN VIP [root@primary01 ~]# nslookup primary-cluster-scan Server: 10.0.0.199 Address: … Read More »How to Add a SCAN VIP
Why Don't We Explicitly Bind VIP and SCAN into NIC
It's because Oracle clusterware will bind them automatically and dynamically. I think we should try to figure out the interface configurations. First, let's see what… Read More »Why Don't We Explicitly Bind VIP and SCAN into NIC