Watson Supply Chain Ideas

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"Soft Stop" functionality for SSP engines for upgrading without service interruptions

Currently even though we have multiple SSP engines it isn't possible to perform a true "high availability" upgrade of the engines because anybody who is connected to an individual SSP engine will be disconnected when the engine is taken down for patching, even though the other engine is still online and available.

We need to be able to shut down engines in a manner that allows "in-flight" connections to finish while preventing new connections from starting,

  • Avatar32.5fb70cce7410889e661286fd7f1897de Guest
  • May 22 2019
  • Needs review
How will this idea be used?

Upgrade SSP with 2+ SSP engines:

1. Shut down first SSP engine.  Engine will immediately stop listening for new connections which will cause Load balancers to redirect new inbound connecitons to other nodes.  Existing sessions are allowed to complete before engine completes shut down.

2.Upgrade first engine to new version

3. Restart first engine

4. Repeat steps 1-3 for each remaining engine.

 

This allows upgrades to be completed with no interruptions to our end-users.  Current design results in many users being disconnected mid-transfer at the moment the SSP engines are stopped.

What is your industry? Automotive
What is the idea priority? High
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