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Chapter 4: Double Upgrade Procedures
30
Server on the node that was upgraded out of order. Continue
upgrading the other nodes before starting Matrix Server on that node.
• To ensure that applications can acquire fcntl(2) locks throughout the
upgrade, you will need to perform the rolling upgrade twice. The first
upgrade takes the servers to a supported operating system running
Matrix Server 3.1.2 in 32-bit mode. The second upgrade takes the
servers to 64-bit mode and allows Matrix Server to take advantage of
64-bit mode.
• During the rolling upgrade, the matrix will include a mix of servers
running 3.1.2 and the older release. As long as the matrix includes at
least one active server running the older release, other servers running
that release will be able to join the matrix (for example, following a
reboot). However, after the last server running the older release has
left the matrix, only servers running 3.1.2 can join the matrix.
Although Matrix Server supports a mix of servers running 3.1.2 and
the older release during the rolling upgrade, on-going operation of a
mixed-version cluster is not supported. All servers should be
upgraded to 3.1.2 as quickly as possible.
• During the upgrade, a mix of servers running 3.1.2 and the older
release may have a PSFS filesystem mounted. After the PSFS
filesystem has been unmounted on the last node running the older
release, the filesystem cannot be mounted on a node running the older
release unless it is first unmounted on the nodes running 3.1.2.
• For best results while the matrix includes a mix of servers running
3.1.2 and the older release, all UI operations (either via the
Management Console or the mx command-line utility) should be
connected to a server running the older release.
• During the rolling upgrade, filesystems cannot be upgraded to add
new features such as filesystem quotas. Instead, you will need to
complete the rolling upgrade first. Then unmount the filesystems
either one-at-a-time or, for MxFS-Linux, one export group at a time
and perform the filesystem upgrade.
• Before performing an upgrade from 2.7.2 or 3.0.1, you will need to
obtain a new license file from your MatrixLink account. The new
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