Upgrade from API Gateway 7.5.x or 7.6.x

This topic describes how to upgrade from API Gateway 7.5.1 or later to API Gateway 7.6.2.

Note   Upgrading or installing API Gateway or API Manager on Windows is not supported.

In API Gateway 7.5.1 and later versions, the Apache Cassandra database is fully separated from the API Gateway (in earlier versions it was embedded with the API Gateway). This simplifies the upgrade process when upgrading from API Gateway 7.5.1 or later, as the data contained in Apache Cassandra does not need to be exported and imported along with the other configuration data.

These are the main differences in an upgrade from API Gateway 7.5.1 and later versions, compared to upgrades from 7.3.x or 7.4.x versions:

  • Your existing Apache Cassandra deployment can remain in place for use with API Gateway 7.6.2. There is no need to install a new Apache Cassandra deployment.
  • No data changes are necessary in the Apache Cassandra database, which means it can remain running throughout the upgrade, serving any upgraded API Gateways when they come online.

For more information, see Compare upgrades from 7.3.x or 7.4.x with upgrades from 7.5.x or 7.6.x.

Caution    
  • During an upgrade, including zero downtime upgrade (ZDU), quotas are reset, meaning that your quotas might be too lenient for a period after the upgrade.
  • During a ZDU the old quota count and new quota count are in use at the same time.
  • Quota could be reduced during ZDU to protect individual instances from being overloaded.

This topic contains the following sections:

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