1 / 5

Active/Passive Configuration

Active/Passive Configuration. The active/passive configuration can provide maximum availability and performance, but does not fully utilize both nodes.

ritchiea
Télécharger la présentation

Active/Passive Configuration

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Active/Passive Configuration The active/passive configuration can provide maximum availability and performance, but does not fully utilize both nodes

  2. The active/passive configuration contains one node that is actively providing resources to clients. The other node is passive and standing by in case of a failover. This configuration can provide high performance and failover capacity. One node of the cluster makes all of the resources available. To achieve optimal performance for any failed over group, it is recommended that the passive node have the same specifications, such as CPU speed, as the active node that controlled the resource. • The disadvantage of this configuration is that it is an expensive allocation of hardware. One of the two servers will not be servicing any clients at any time. • The advantage of this configuration is that after failover, the applications running on the group that fails over do not interfere with any other applications running on the node, and therefore the application can run at maximum capacity. • In the slide, Node A has control of Group 1. The administrator has configured Node B as the hot spare with the capability to control Group 1. If Node A goes offline, Node B will control Group 1. When Node A returns to an online state, Node A becomes the passive system and Group 1 remains with Node B. Because failback does not occur, this configuration provides maximum availability by reducing the time that the service or application is unavailable. • If Node B does not have equal capacity to Node A, you may need to configure a failback for Group 1 during nonpeak load times.

  3. Considerations for Choosing this Configuration • Choose this configuration when you need to provide critical applications and resources with high availability. For example, an organization that is selling products on the World Wide Web could justify the expense of having an idle server by guaranteeing continuous high performance access to customers. • Choose the active/passive configuration if your needs meet the following: • You only require one group for all of the applications and services. • You want failover capability for the applications and services. • To avoid downtime after failover, the applications and services may not fail back to the other node. • The applications and services support a cluster environment. • Note: If you want the applications and services to run at maximum capacity on either node, both nodes will need to provide the same capacity.

  4. Availability • This configuration provides very high availability by not failing back when the nodes are of equal capacity, with the added benefit of no performance degradation during failover.

  5. Failover Policy • If the passive system provides identical performance to the failed node, you do not need to configure the failback policy. If the passive system does not provide identical performance, you can configure the group to fail back when the preferred node is online.

More Related