8.1 Clustering for Scalability
The term cluster in vRealize Operations Manager refers to two or more nodes taking on the roles of master node, master replica node, or data node.
Additional vRealize Operations Manager nodes can be deployed to specialize in collecting data from remote locations. These are called remote collectors (RCs).
During installation, a user can select a predefined node size based on the size of the infrastructure to be monitored. When vRealize Operations Manager outgrows the existing node size, the cluster can be expanded by adding one or more nodes of the same size.
The following table shows the predefined node sizes and corresponding capacity.
Table 5. vRealize Operations Manager Node Size Resource Attributes and Capacity
Characteristic/Node Size | Extra Small | Small | Medium | Large | Standard Size Remote Collectors | Large Size Remote Collectors |
vCPU | 2 | 4 | 8 | 16 | 2 | 4 |
Memory (GB) | 8 | 16 | 32 | 48 | 4 | 16 |
IOPS | See the Sizing Guide Worksheet for details (http://kb.vmware.com/kb/2093783) |
Disk space | See the Sizing Guide Worksheet for details |
| | | | | | |
Single-node maximum objects | 250 | 2,400 | 7,000 | 12,000 | 1,500* | 12,000 |
Single-node maximum collected metrics** | 70,000 | 800,000 | 2,000,000 | 3,500,000 | NA | NA |
| | | | | | |
Multi-node maximum objects per node*** | NA | 2,000 | 5,000 | 10,000 | NA | NA |
Multi-node maximum collected metrics per node | NA | 700,000 | 1,500,000 | 2,500,000 | NA | NA |
| | | | | | |
Maximum objects for
8-node maximum | NA | NA | 40,000 | 75,000 | NA | NA |
Maximum metrics for
8-node configuration | NA | NA | 12,000,000 | 20,000,000 | NA | NA |
* The object limit for the remote collector is based on the VMware vCenter Server® adapter.
** Metric numbers reflect the total number of metrics that are collected from all adapter instances in vRealize Operations Manager.
*** In large, 8-node configurations, the reduction in maximum metrics permits some headroom.
Cluster sizing is determined using VMware sizing guidelines outlined in VMware knowledge base article
vRealize Operations Manager Sizing Guidelines (2093783) at
http://kb.vmware.com/kb/2093783. Sizing guidance is product version specific.