HP VMA-series Memory Arrays Manuel d'utilisateur Page 64

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64 AM456-9007B Rev 02 HP VMA SAN Gateway Installation and User Guide
Software Upgrades
Upgrading the HP VMA SAN Gateway software requires that you obtain the latest
software release, run a command to distribute and install the software on each HP
VMA SAN Gateway, and then reboot the HP VMA SAN Gateway cluster.
There are three options for upgrading the HP VMA SAN Gateway cluster:
immediate, rolling, and staged.
For immediate upgrades, the HP VMA SAN Gateways are upgraded
simultaneously and then restarted. During this process clients can no longer
maintain connections to the file servers until the cluster is restarted again. Although
this method of upgrading the cluster is relatively quick, you will experience some
downtime while the nodes reboot.
For rolling upgrades, the upgrade and restart process is done on each HP VMA
SAN Gateway one at a time. Rolling upgrades can only be done when upgrading
between releases that differ by minor version number; for example, upgrading from
version 5.1.0 to version 5.1.
x, where x is 1, 2, 3, and so on. Rolling upgrades from
one major release to another (for example, 5.1.0 to 5.2.0) are not supported.
For staged upgrades, the cluster is split into two clusters, A and B, with half the HP
VMA SAN Gateways in cluster A and half in Cluster B. The HP VMA SAN
Gateway(s) in Cluster B are upgraded first, followed by those in Cluster A. While
Cluster B is being upgraded, Cluster A provides access to storage, and vice-versa.
For details on the specific CLI command for upgrading to a new software
release, see Upgrade the HP VMA SAN Gateway Software on page 122.
For information on using the VMA Web Interface to perform software
upgrades, see Tools: Upgrade on page 203.
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