3.1.2 Matrix Server Upgrade Guide

Double Upgrade Procedures

This chapter describes how to upgrade Matrix Server on clusters that

meet these conditions:

• The nodes have 64-bit CPUs and are currently running in 32-bit mode,

but will upgrade to 64-bit mode.

• The nodes are currently running Matrix Server 2.7.2, 3.0.1, 3.1.0, or

3.1.1.

The rolling upgrade does not require any matrix downtime. Each server

is removed from the matrix, upgraded, and then returned to the matrix.

Rolling Upgrade Considerations

You should be aware of the following when upgrading Matrix Server:

• Servers can be upgraded one-at-a-time during the rolling upgrade.

The server with the numerically highest primary IP address must be

upgraded first. Then continue to upgrade the servers in descending

order of IP address, with the server with the lowest primary IP

address being upgraded last. (This is a change in order from previous

Matrix Server upgrades.)

If a server is accidentally upgraded out of order, when a higher-

number server is added the servers still running the older release will

think they need to leave the matrix and will no longer send

configuration and status updates. To correct this problem, stop Matrix