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12c 如何将Standard Cluster转化为Flex Cluster

12c RAC 引入了两个新概念

中心节点:和之前的版本一样,它们通过专用网络相互连接,可以直接访问共享存储。这些节点可以直接访问 Oracle 集群注册表 (OCR) 和表决磁盘 (Voting Disks),最多可以有64个中心节点(Hub Nodes)

叶子节点:这些节点彼此不互连,也不能像中心节点一样访问共享存储。每个叶节点与所连接的中心节点通信,并通过所连接的中心节点连接到集群,这些节点不能运行ASM/RDBMS,我们可以部署应用在这些叶节点上。应用可以通过叶节点访问数据库,而不必在叶节点上运行 ASM 实例。叶子节点意在提高应用的高可用性。



Hub Nodes and Leaf Nodes的不同
Hub Nodes: 

Direct access to the shared storage  
They can access the Oracle Cluster Registry (OCR) and Voting Disk (VD) directly  We can run an ASM instance on them. 
We can run database instance on them as well 
Leaf Nodes: 
It's part of the cluster as well, but cannot direct access to the shared storage  
They connected to the cluster via the Hub Node that is linked to  
It does run Grid Infrastructure, but cannot run as ASM/Database instances. We can deploy Fusion Middleware ,weblogic on them  



通过以下的步骤我们可以将Standard Cluster转化为Flex Cluster

查看当前cluster模式

[root@ohs1 ~]# crsctl get cluster mode status

Cluster is running in "standard" mode


查看GNS配置

[root@ohs1 ~]# srvctl config gns
GNS is enabled.
GNS VIP addresses: 10.0.2.11
Domain served by GNS: us.ohsdba.cn

如果不是Flex ASM先做转化再继续后面的步骤

ASMCMD> showclustermode
ASM cluster : Flex mode enabled
ASMCMD> showclusterstate
Normal
ASMCMD> 


设置Cluster模式为Flex

[root@ohs1 ~]# crsctl set cluster mode -h
Usage:
  crsctl set cluster mode flex
 where
      flex                   Set cluster mode to "flex"

[root@ohs1 ~]# crsctl set cluster mode flex

CRS-4933: Cluster mode set to "flex"; restart Oracle High Availability Services on all nodes for cluster to run in "flex" mode.


关闭每个节点的集群服务

[root@ohs1 ~]# crsctl stop crs
CRS-2791: Starting shutdown of Oracle High Availability Services-managed resources on 'ohs1'
CRS-2673: Attempting to stop 'ora.crsd' on 'ohs1'
CRS-2790: Starting shutdown of Cluster Ready Services-managed resources on 'ohs1'
CRS-2673: Attempting to stop 'ora.LISTENER_SCAN3.lsnr' on 'ohs1'
CRS-2673: Attempting to stop 'ora.SYSTEMDG.dg' on 'ohs1'
CRS-2673: Attempting to stop 'ora.oc4j' on 'ohs1'
CRS-2673: Attempting to stop 'ora.FRA_PGOLD.dg' on 'ohs1'
CRS-2673: Attempting to stop 'ora.LISTENER.lsnr' on 'ohs1'
CRS-2673: Attempting to stop 'ora.mgmtdb' on 'ohs1'
CRS-2673: Attempting to stop 'ora.cvu' on 'ohs1'
CRS-2677: Stop of 'ora.SYSTEMDG.dg' on 'ohs1' succeeded
CRS-2677: Stop of 'ora.cvu' on 'ohs1' succeeded
CRS-2672: Attempting to start 'ora.cvu' on 'ohs2'
CRS-2677: Stop of 'ora.FRA_PGOLD.dg' on 'ohs1' succeeded
CRS-2676: Start of 'ora.cvu' on 'ohs2' succeeded
CRS-2673: Attempting to stop 'ora.DATA_PGOLD.dg' on 'ohs1'
CRS-2677: Stop of 'ora.DATA_PGOLD.dg' on 'ohs1' succeeded
CRS-2673: Attempting to stop 'ora.asm' on 'ohs1'
CRS-2677: Stop of 'ora.LISTENER_SCAN3.lsnr' on 'ohs1' succeeded
CRS-2673: Attempting to stop 'ora.scan3.vip' on 'ohs1'
CRS-2677: Stop of 'ora.LISTENER.lsnr' on 'ohs1' succeeded
CRS-2673: Attempting to stop 'ora.ohs1.vip' on 'ohs1'
CRS-2677: Stop of 'ora.scan3.vip' on 'ohs1' succeeded
CRS-2672: Attempting to start 'ora.scan3.vip' on 'ohs2'
CRS-2677: Stop of 'ora.asm' on 'ohs1' succeeded
CRS-2672: Attempting to start 'ora.asm' on 'ohs2'
CRS-2677: Stop of 'ora.ohs1.vip' on 'ohs1' succeeded
CRS-2672: Attempting to start 'ora.ohs1.vip' on 'ohs3'
CRS-2677: Stop of 'ora.mgmtdb' on 'ohs1' succeeded
CRS-2673: Attempting to stop 'ora.MGMTLSNR' on 'ohs1'
CRS-2677: Stop of 'ora.MGMTLSNR' on 'ohs1' succeeded
CRS-2672: Attempting to start 'ora.MGMTLSNR' on 'ohs3'
CRS-2677: Stop of 'ora.oc4j' on 'ohs1' succeeded
CRS-2672: Attempting to start 'ora.oc4j' on 'ohs3'
CRS-2676: Start of 'ora.MGMTLSNR' on 'ohs3' succeeded
CRS-2672: Attempting to start 'ora.mgmtdb' on 'ohs3'
CRS-2676: Start of 'ora.oc4j' on 'ohs3' succeeded
CRS-2676: Start of 'ora.scan3.vip' on 'ohs2' succeeded
CRS-2673: Attempting to stop 'ora.scan3.vip' on 'ohs2'
CRS-2677: Stop of 'ora.scan3.vip' on 'ohs2' succeeded
CRS-2672: Attempting to start 'ora.scan3.vip' on 'ohs3'
CRS-2676: Start of 'ora.ohs1.vip' on 'ohs3' succeeded
CRS-2676: Start of 'ora.mgmtdb' on 'ohs3' succeeded
CRS-2676: Start of 'ora.scan3.vip' on 'ohs3' succeeded
CRS-2672: Attempting to start 'ora.LISTENER_SCAN3.lsnr' on 'ohs3'
CRS-2676: Start of 'ora.asm' on 'ohs2' succeeded
CRS-2673: Attempting to stop 'ora.ASMNET1LSNR_ASM.lsnr' on 'ohs1'
CRS-2677: Stop of 'ora.ASMNET1LSNR_ASM.lsnr' on 'ohs1' succeeded
CRS-2676: Start of 'ora.LISTENER_SCAN3.lsnr' on 'ohs3' succeeded
CRS-2673: Attempting to stop 'ora.ons' on 'ohs1'
CRS-2677: Stop of 'ora.ons' on 'ohs1' succeeded
CRS-2673: Attempting to stop 'ora.net1.network' on 'ohs1'
CRS-2677: Stop of 'ora.net1.network' on 'ohs1' succeeded
CRS-2792: Shutdown of Cluster Ready Services-managed resources on 'ohs1' has completed
CRS-2677: Stop of 'ora.crsd' on 'ohs1' succeeded
CRS-2673: Attempting to stop 'ora.crf' on 'ohs1'
CRS-2673: Attempting to stop 'ora.storage' on 'ohs1'
CRS-2673: Attempting to stop 'ora.gpnpd' on 'ohs1'
CRS-2673: Attempting to stop 'ora.mdnsd' on 'ohs1'
CRS-2677: Stop of 'ora.storage' on 'ohs1' succeeded
CRS-2673: Attempting to stop 'ora.ctssd' on 'ohs1'
CRS-2673: Attempting to stop 'ora.evmd' on 'ohs1'
CRS-2673: Attempting to stop 'ora.asm' on 'ohs1'
CRS-2677: Stop of 'ora.crf' on 'ohs1' succeeded
CRS-2677: Stop of 'ora.gpnpd' on 'ohs1' succeeded
CRS-2677: Stop of 'ora.mdnsd' on 'ohs1' succeeded
CRS-2677: Stop of 'ora.ctssd' on 'ohs1' succeeded
CRS-2677: Stop of 'ora.evmd' on 'ohs1' succeeded
CRS-2677: Stop of 'ora.asm' on 'ohs1' succeeded
CRS-2673: Attempting to stop 'ora.cluster_interconnect.haip' on 'ohs1'
CRS-2677: Stop of 'ora.cluster_interconnect.haip' on 'ohs1' succeeded
CRS-2673: Attempting to stop 'ora.cssd' on 'ohs1'
CRS-2677: Stop of 'ora.cssd' on 'ohs1' succeeded
CRS-2673: Attempting to stop 'ora.gipcd' on 'ohs1'
CRS-2677: Stop of 'ora.gipcd' on 'ohs1' succeeded
CRS-2793: Shutdown of Oracle High Availability Services-managed resources on 'ohs1' has completed
CRS-4133: Oracle High Availability Services has been stopped.
[root@ohs1 ~]#
[root@ohs2 ~]# crsctl stop crs
CRS-2791: Starting shutdown of Oracle High Availability Services-managed resources on 'ohs2'
CRS-2673: Attempting to stop 'ora.crsd' on 'ohs2'
CRS-2790: Starting shutdown of Cluster Ready Services-managed resources on 'ohs2'
CRS-2673: Attempting to stop 'ora.LISTENER_SCAN2.lsnr' on 'ohs2'
CRS-2673: Attempting to stop 'ora.cvu' on 'ohs2'
CRS-2677: Stop of 'ora.cvu' on 'ohs2' succeeded
CRS-2672: Attempting to start 'ora.cvu' on 'ohs3'
CRS-2676: Start of 'ora.cvu' on 'ohs3' succeeded
CRS-2677: Stop of 'ora.LISTENER_SCAN2.lsnr' on 'ohs2' succeeded
CRS-2673: Attempting to stop 'ora.scan2.vip' on 'ohs2'
CRS-2677: Stop of 'ora.scan2.vip' on 'ohs2' succeeded
CRS-2672: Attempting to start 'ora.scan2.vip' on 'ohs3'
CRS-2676: Start of 'ora.scan2.vip' on 'ohs3' succeeded
CRS-2672: Attempting to start 'ora.LISTENER_SCAN2.lsnr' on 'ohs3'
CRS-2673: Attempting to stop 'ora.LISTENER.lsnr' on 'ohs2'
CRS-2673: Attempting to stop 'ora.asm' on 'ohs2'
CRS-2677: Stop of 'ora.LISTENER.lsnr' on 'ohs2' succeeded
CRS-2673: Attempting to stop 'ora.ohs2.vip' on 'ohs2'
CRS-2677: Stop of 'ora.ohs2.vip' on 'ohs2' succeeded
CRS-2672: Attempting to start 'ora.ohs2.vip' on 'ohs3'
CRS-2676: Start of 'ora.LISTENER_SCAN2.lsnr' on 'ohs3' succeeded
CRS-2676: Start of 'ora.ohs2.vip' on 'ohs3' succeeded
CRS-2673: Attempting to stop 'ora.gns' on 'ohs2'
CRS-2677: Stop of 'ora.asm' on 'ohs2' succeeded
CRS-2673: Attempting to stop 'ora.ASMNET1LSNR_ASM.lsnr' on 'ohs2'
CRS-2677: Stop of 'ora.ASMNET1LSNR_ASM.lsnr' on 'ohs2' succeeded
CRS-2677: Stop of 'ora.gns' on 'ohs2' succeeded
CRS-2673: Attempting to stop 'ora.gns.vip' on 'ohs2'
CRS-2677: Stop of 'ora.gns.vip' on 'ohs2' succeeded
CRS-2672: Attempting to start 'ora.gns.vip' on 'ohs3'
CRS-2676: Start of 'ora.gns.vip' on 'ohs3' succeeded
CRS-2673: Attempting to stop 'ora.ons' on 'ohs2'
CRS-2677: Stop of 'ora.ons' on 'ohs2' succeeded
CRS-2673: Attempting to stop 'ora.net1.network' on 'ohs2'
CRS-2677: Stop of 'ora.net1.network' on 'ohs2' succeeded
CRS-2792: Shutdown of Cluster Ready Services-managed resources on 'ohs2' has completed
CRS-2677: Stop of 'ora.crsd' on 'ohs2' succeeded
CRS-2673: Attempting to stop 'ora.gpnpd' on 'ohs2'
CRS-2673: Attempting to stop 'ora.crf' on 'ohs2'
CRS-2673: Attempting to stop 'ora.ctssd' on 'ohs2'
CRS-2673: Attempting to stop 'ora.evmd' on 'ohs2'
CRS-2673: Attempting to stop 'ora.storage' on 'ohs2'
CRS-2673: Attempting to stop 'ora.mdnsd' on 'ohs2'
CRS-2677: Stop of 'ora.storage' on 'ohs2' succeeded
CRS-2673: Attempting to stop 'ora.asm' on 'ohs2'
CRS-2677: Stop of 'ora.gpnpd' on 'ohs2' succeeded
CRS-2677: Stop of 'ora.crf' on 'ohs2' succeeded
CRS-2677: Stop of 'ora.ctssd' on 'ohs2' succeeded
CRS-2677: Stop of 'ora.mdnsd' on 'ohs2' succeeded
CRS-2677: Stop of 'ora.evmd' on 'ohs2' succeeded
CRS-2677: Stop of 'ora.asm' on 'ohs2' succeeded
CRS-2673: Attempting to stop 'ora.cluster_interconnect.haip' on 'ohs2'
CRS-2677: Stop of 'ora.cluster_interconnect.haip' on 'ohs2' succeeded
CRS-2673: Attempting to stop 'ora.cssd' on 'ohs2'
CRS-2677: Stop of 'ora.cssd' on 'ohs2' succeeded
CRS-2673: Attempting to stop 'ora.gipcd' on 'ohs2'
CRS-2677: Stop of 'ora.gipcd' on 'ohs2' succeeded
CRS-2793: Shutdown of Oracle High Availability Services-managed resources on 'ohs2' has completed
CRS-4133: Oracle High Availability Services has been stopped.
[root@ohs2 ~]#
[root@ohs3 ~]# crsctl stop crs
CRS-2791: Starting shutdown of Oracle High Availability Services-managed resources on 'ohs3'
CRS-2673: Attempting to stop 'ora.crsd' on 'ohs3'
CRS-2790: Starting shutdown of Cluster Ready Services-managed resources on 'ohs3'
CRS-2673: Attempting to stop 'ora.LISTENER_SCAN1.lsnr' on 'ohs3'
CRS-2673: Attempting to stop 'ora.ohs3.vip' on 'ohs3'
CRS-2673: Attempting to stop 'ora.LISTENER_SCAN3.lsnr' on 'ohs3'
CRS-2673: Attempting to stop 'ora.DATA_PGOLD.dg' on 'ohs3'
CRS-2673: Attempting to stop 'ora.FRA_PGOLD.dg' on 'ohs3'
CRS-2673: Attempting to stop 'ora.mgmtdb' on 'ohs3'
CRS-2673: Attempting to stop 'ora.cvu' on 'ohs3'
CRS-2673: Attempting to stop 'ora.LISTENER.lsnr' on 'ohs3'
CRS-2673: Attempting to stop 'ora.LISTENER_SCAN2.lsnr' on 'ohs3'
CRS-2673: Attempting to stop 'ora.oc4j' on 'ohs3'
CRS-2677: Stop of 'ora.cvu' on 'ohs3' succeeded
CRS-2677: Stop of 'ora.DATA_PGOLD.dg' on 'ohs3' succeeded
CRS-2677: Stop of 'ora.FRA_PGOLD.dg' on 'ohs3' succeeded
CRS-2677: Stop of 'ora.LISTENER_SCAN3.lsnr' on 'ohs3' succeeded
CRS-2673: Attempting to stop 'ora.scan3.vip' on 'ohs3'
CRS-2677: Stop of 'ora.LISTENER_SCAN2.lsnr' on 'ohs3' succeeded
CRS-2677: Stop of 'ora.LISTENER.lsnr' on 'ohs3' succeeded
CRS-2673: Attempting to stop 'ora.scan2.vip' on 'ohs3'
CRS-2677: Stop of 'ora.LISTENER_SCAN1.lsnr' on 'ohs3' succeeded
CRS-2673: Attempting to stop 'ora.scan1.vip' on 'ohs3'
CRS-2677: Stop of 'ora.ohs3.vip' on 'ohs3' succeeded
CRS-2673: Attempting to stop 'ora.ohs1.vip' on 'ohs3'
CRS-2677: Stop of 'ora.scan2.vip' on 'ohs3' succeeded
CRS-2677: Stop of 'ora.scan3.vip' on 'ohs3' succeeded
CRS-2673: Attempting to stop 'ora.gns.vip' on 'ohs3'
CRS-2677: Stop of 'ora.mgmtdb' on 'ohs3' succeeded
CRS-2673: Attempting to stop 'ora.SYSTEMDG.dg' on 'ohs3'
CRS-2673: Attempting to stop 'ora.MGMTLSNR' on 'ohs3'
CRS-2677: Stop of 'ora.SYSTEMDG.dg' on 'ohs3' succeeded
CRS-2673: Attempting to stop 'ora.asm' on 'ohs3'
CRS-2677: Stop of 'ora.scan1.vip' on 'ohs3' succeeded
CRS-2677: Stop of 'ora.MGMTLSNR' on 'ohs3' succeeded
CRS-2677: Stop of 'ora.ohs1.vip' on 'ohs3' succeeded
CRS-2673: Attempting to stop 'ora.ohs2.vip' on 'ohs3'
CRS-2677: Stop of 'ora.gns.vip' on 'ohs3' succeeded
CRS-2677: Stop of 'ora.asm' on 'ohs3' succeeded
CRS-2673: Attempting to stop 'ora.ASMNET1LSNR_ASM.lsnr' on 'ohs3'
CRS-2677: Stop of 'ora.ohs2.vip' on 'ohs3' succeeded
CRS-2677: Stop of 'ora.ASMNET1LSNR_ASM.lsnr' on 'ohs3' succeeded
CRS-2677: Stop of 'ora.oc4j' on 'ohs3' succeeded
CRS-2673: Attempting to stop 'ora.ons' on 'ohs3'
CRS-2677: Stop of 'ora.ons' on 'ohs3' succeeded
CRS-2673: Attempting to stop 'ora.net1.network' on 'ohs3'
CRS-2677: Stop of 'ora.net1.network' on 'ohs3' succeeded
CRS-2792: Shutdown of Cluster Ready Services-managed resources on 'ohs3' has completed
CRS-2677: Stop of 'ora.crsd' on 'ohs3' succeeded
CRS-2673: Attempting to stop 'ora.storage' on 'ohs3'
CRS-2673: Attempting to stop 'ora.mdnsd' on 'ohs3'
CRS-2673: Attempting to stop 'ora.gpnpd' on 'ohs3'
CRS-2677: Stop of 'ora.storage' on 'ohs3' succeeded
CRS-2673: Attempting to stop 'ora.ctssd' on 'ohs3'
CRS-2673: Attempting to stop 'ora.evmd' on 'ohs3'
CRS-2673: Attempting to stop 'ora.asm' on 'ohs3'
CRS-2677: Stop of 'ora.mdnsd' on 'ohs3' succeeded
CRS-2677: Stop of 'ora.gpnpd' on 'ohs3' succeeded
CRS-2677: Stop of 'ora.ctssd' on 'ohs3' succeeded
CRS-2677: Stop of 'ora.evmd' on 'ohs3' succeeded
CRS-2677: Stop of 'ora.asm' on 'ohs3' succeeded
CRS-2673: Attempting to stop 'ora.cluster_interconnect.haip' on 'ohs3'
CRS-2677: Stop of 'ora.cluster_interconnect.haip' on 'ohs3' succeeded
CRS-2673: Attempting to stop 'ora.cssd' on 'ohs3'
CRS-2677: Stop of 'ora.cssd' on 'ohs3' succeeded
CRS-2673: Attempting to stop 'ora.crf' on 'ohs3'
CRS-2677: Stop of 'ora.crf' on 'ohs3' succeeded
CRS-2673: Attempting to stop 'ora.gipcd' on 'ohs3'
CRS-2677: Stop of 'ora.gipcd' on 'ohs3' succeeded
CRS-2793: Shutdown of Oracle High Availability Services-managed resources on 'ohs3' has completed
CRS-4133: Oracle High Availability Services has been stopped.
[root@ohs3 ~]# 


启动每个节点的集群服务
[root@ohs1 ~]# crsctl start crs -wait
CRS-4123: Starting Oracle High Availability Services-managed resources
CRS-2672: Attempting to start 'ora.mdnsd' on 'ohs1'
CRS-2672: Attempting to start 'ora.evmd' on 'ohs1'
CRS-2676: Start of 'ora.mdnsd' on 'ohs1' succeeded
CRS-2676: Start of 'ora.evmd' on 'ohs1' succeeded
CRS-2672: Attempting to start 'ora.gpnpd' on 'ohs1'
CRS-2676: Start of 'ora.gpnpd' on 'ohs1' succeeded
CRS-2672: Attempting to start 'ora.gipcd' on 'ohs1'
CRS-2676: Start of 'ora.gipcd' on 'ohs1' succeeded
CRS-2672: Attempting to start 'ora.cssdmonitor' on 'ohs1'
CRS-2676: Start of 'ora.cssdmonitor' on 'ohs1' succeeded
CRS-2672: Attempting to start 'ora.cssd' on 'ohs1'
CRS-2672: Attempting to start 'ora.diskmon' on 'ohs1'
CRS-2676: Start of 'ora.diskmon' on 'ohs1' succeeded
CRS-2676: Start of 'ora.cssd' on 'ohs1' succeeded
CRS-2672: Attempting to start 'ora.cluster_interconnect.haip' on 'ohs1'
CRS-2672: Attempting to start 'ora.ctssd' on 'ohs1'
CRS-2676: Start of 'ora.ctssd' on 'ohs1' succeeded
CRS-2676: Start of 'ora.cluster_interconnect.haip' on 'ohs1' succeeded
CRS-2672: Attempting to start 'ora.asm' on 'ohs1'
CRS-2676: Start of 'ora.asm' on 'ohs1' succeeded
CRS-2672: Attempting to start 'ora.storage' on 'ohs1'
CRS-2676: Start of 'ora.storage' on 'ohs1' succeeded
CRS-2672: Attempting to start 'ora.crf' on 'ohs1'
CRS-2676: Start of 'ora.crf' on 'ohs1' succeeded
CRS-2672: Attempting to start 'ora.crsd' on 'ohs1'
CRS-2676: Start of 'ora.crsd' on 'ohs1' succeeded
CRS-6023: Starting Oracle Cluster Ready Services-managed resources
CRS-2664: Resource 'ora.FRA_PGOLD.dg' is already running on 'ohs1'
CRS-2664: Resource 'ora.DATA_PGOLD.dg' is already running on 'ohs1'
CRS-2664: Resource 'ora.SYSTEMDG.dg' is already running on 'ohs1'
CRS-6017: Processing resource auto-start for servers: ohs1
CRS-2672: Attempting to start 'ora.MGMTLSNR' on 'ohs1'
CRS-2672: Attempting to start 'ora.oc4j' on 'ohs1'
CRS-2676: Start of 'ora.MGMTLSNR' on 'ohs1' succeeded
CRS-2676: Start of 'ora.oc4j' on 'ohs1' succeeded
CRS-2672: Attempting to start 'ora.mgmtdb' on 'ohs1'
CRS-2676: Start of 'ora.mgmtdb' on 'ohs1' succeeded
[root@ohs1 ~]# 

查看集群模式

[root@ohs1 ~]# crsctl get cluster hubsize
CRS-4950: Current hubsize parameter value is 32
[root@ohs1 ~]# 
[root@ohs1 ~]# crsctl get cluster mode config
Cluster is configured as type "flex"
[root@ohs1 ~]# crsctl get cluster mode status
Cluster is running in "flex" mode
[root@ohs1 ~]# 


查看集群角色

[root@ohs1 ~]# crsctl get node role config -all
[root@ohs1 ~]# crsctl get node role config -all
Node 'ohs1' configured role is 'hub'
Node 'ohs2' configured role is 'hub'
Node 'ohs3' configured role is 'hub'
[root@ohs1 ~]# 
[root@ohs1 ~]# crsctl get node role status -all
Node 'ohs1' active role is 'hub'
Node 'ohs2' active role is 'hub'
Node 'ohs3' active role is 'hub'
[root@ohs1 ~]# 
[root@ohs1 ~]# olsnodes -a -s -n -t -a
ohs1    1       Active  Hub     Unpinned
ohs2    2       Active  Hub     Unpinned
ohs3    3       Active  Hub     Unpinned
[root@ohs1 ~]#
[root@ohs1 ~]#



Reference

http://docs.oracle.com/database/121/CWADD/bigcluster.htm#CWADD92409

http://www.oracle.com/technetwork/cn/articles/database/flexasm-flexcluster-benefits-odb12c-2177371-zhs.html


关键词:12c rac 

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