THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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Example: Smoke tests user and SPNEGO user defined in HDP-2.0.6
Stack Upgrades
Ambari provides the ability to upgrade your cluster from a lower stack-version to a higher stack-version.
Each stack-version defines upgrade-packs, which are XML files describing the upgrade process. These upgrade-pack XML files are placed in the stack-version's upgrades/ folder.
Example: HDP-2.3, HDP-2.4
Each stack-version should have an upgrade-pack for the next stack-version a cluster can upgrade to. Ex: Upgrade-pack from HDP-2.3 to HDP-2.4
There are two kinds of upgrades:
| Upgrade Type | Pros | Cons |
|---|---|---|
| Rolling Upgrade | Minimal cluster downtime - services available throughout upgrade process | Takes a long time due to incremental upgrade approach - sometimes days |
| Express Upgrade | Cluster unavailable - services are stopped during upgrade process | Much faster - clusters can be upgraded in a couple of hours |
Rolling Upgrades
Express Upgrades
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