Disaster Tolerance and Recovery in a Serviceguard Cluster
Understanding Types of Disaster Tolerant Clusters
Table | Comparison of Disaster Tolerant Cluster Solutions (Continued) | |||
|
|
|
| |
Attributes | Extended Distance | CLX | Continentalclusters | |
Cluster | ||||
|
| |||
|
|
|
| |
Application | Automatic (no manual | Automatic (no manual | ||
Failover | intervention required). | intervention required). | must “push the | |
type |
|
| button” to initiate | |
|
|
| recovery). | |
|
|
|
| |
Access Mode | Active/Standby | Active/Standby | Active/Standby | |
for a |
|
|
| |
package |
|
|
| |
|
|
|
| |
Client | Client detects the lost | Client detects the lost | You must reconnect | |
Transparen | connection. You must | connection. You must | once the application is | |
cy | reconnect once the | reconnect once the | recovered at second | |
| application is recovered | application is recovered | site. | |
| at second site. | at second site. |
| |
|
|
|
| |
Maximum | 2 nodes for this release. | 2 to 16 nodes | 1 to 16 nodes in each | |
Cluster Size |
|
| cluster supporting up | |
Allowed |
|
| to 3 primary clusters | |
|
|
| and one recovery | |
|
|
| cluster. (maximum | |
|
|
| total of 4 | |
|
|
| nodes) | |
|
|
|
| |
Storage | Identical storage is not | Identical Storage is | Identical storage is | |
| required (replication is | required. | required if | |
|
| |||
| mirroring). |
| mirroring is used. | |
|
|
| Identical storage is | |
|
|
| not required for other | |
|
|
| data replication | |
|
|
| implementations. | |
|
|
|
| |
34 | Chapter 1 |