Linux

How to Build 18c RAC – 1 of 4 – Preparing Two Database Servers

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Network Design for RAC Let’s see the network design of our cluster database. [root@primary01 ~]# vi /etc/hosts # Public 192.168.10.11 primary01 primary01.example.com 192.168.10.12 primary02 primary02.example.com # Private 192.168.24.11 primary01-priv primary01-priv.example.com 192.168.24.12 primary02-priv primary02-priv.example.com # VIP 192.168.10.111 primary01-vip primary01-vip.example.com 192.168.10.112 primary02-vip primary02-vip.example.com # SCAN # 192.168.10.81 primary-cluster-scan primary-cluster-scan.example.com # 192.168.10.82 primary-cluster-scan primary-cluster-scan.example.com # 192.168.10.83 primary-cluster-scan primary-cluster-scan.example.com […]
ASM

How to Resolve Grid Installation OUI Discovers No Disk

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Requirements for Disk Discovery There’re several requirements for disks to be discovered: 1. Right Device Type For 11g or later, only block devices leading by letter b in permission notation are acceptable, any others device types, such as character devices, symbolic links (leading by letter l) and pseudo devices are not ASM candidates. Please see […]
ASMLib

How to Resolve ASMLib Scanned No Disks on Boot

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ASMLib Scanned Nothing on Boot-Time ASMLib seems to be started too soon to scan iSCSI disks which may not be ready on boot in Enterprise Linux 7. [root@primary01 ~]# oracleasm listdisks [root@primary01 ~]# oracleasm-discover Using ASMLib from /opt/oracle/extapi/64/asm/orcl/1/libasm.so [ASM Library – Generic Linux, version 2.0.12 (KABI_V2)] Nothing was found there when we tried to list […]
ASM

How to Resolve ASMLib Fails to Open Disk Candidates

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ASMLib Seems Good In my grid installation plan for 18c database, I use ASMLib to make device path persistent for ASM candidate disks. As a result, oracleasm should be able to recognize those disks as expected. [root@primary01 ~]# oracleasm listdisks ASMDISK01 ASMDISK02 [root@primary01 ~]# oracleasm-discover Using ASMLib from /opt/oracle/extapi/64/asm/orcl/1/libasm.so [ASM Library – Generic Linux, version […]