Coyote Point Systems Equalizer Spezifikationen PDF herunterladen (Seite 462)

100

101

Failover

5. If the preferred peer is not one of the systems that can provide connectivity, or if a cluster has no preferred

peer set, then Equalizer checks to see if the peer that has the ‘preferred primary’ flag set can provide the

required connectivity. If it can, the failover groups are moved to that peer.

6. If the preferred primary is not one of the systems that can provide connectivity, the Equalizer checks the

System ID of all the peers that can provide the required connectivity, and moves the failover groups to that

peer.

7. If all the above fails to select a peer to which the failover groups can be moved, they remain instantiated on

the current peer.

Note - In Step 6, above, the Equalizer System ID number is used to break "ties" if checking the preferred peer and

preferred primary settings fail to identify a peer to which we can fail over, and there is more than one peer available

that can provide the required connectivity. This is why the system with the highest System ID is used as the "+1"

backup unit in all the sample configurations, so that we are guaranteed to move a failover group over to the dedicated

backup unit when there is no preferred peer or preferred primary available that provides the connectivity required by

the failover group.

Equalizer’s System ID is displayed in the CLI using the global context version command:

eqcli > version

Equalizer O/S Version : 10.0.3a

Equalizer O/S Tag : AA

System Type : E450GX

System Revision : 2

System Serial Number : A08CA-16001

System ID : 0012345ABCDE

...

The System ID is a 12-digit hexadecimal number. You can use the hexadecimal setting on a calculator to

determine which of your systems has the highest System ID.

Monitoring N+1 Failover

There are several CLI commands you can use to monitor failover status:

Displaying Failover Group Status

Failover groups are configured by Equalizer automatically according to your network topology and the subnets on

which cluster and server IP addresses reside. You can modify the failover group configuration only by modifying

your cluster IP addresses, server IP addresses, and subnet configuration.

To display the current list of failover groups, use the show fogrp global context command:

462

1 2 ... 457 458 459 460 461 462 463 464 465 466 467 ... 593 594

Kommentare zu diesen Handbüchern

Keine Kommentare

Coyote Point Systems Equalizer Spezifikationen Seite 462

Kommentare zu diesen Handbüchern

Verwandte Produkte und Handbücher für Audio-Equalizer Coyote Point Systems Equalizer