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Add zonal isolation blog


### Architecture
Here is what the architecture of a zonally isolated Cadence-based system looks like:
![zonal isolation overview](/img/zone-isolation.png)
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image seems broken when markdown is visualized https://github.com/uber/Cadence-Docs/blob/58a26015af67cb744bb757fc2e4504676daf003e/src/blog/_posts/zonal-isolation-v1.md
Please double check this is the right path format to insert images

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it needs to be compiled to be visualized, so it's not visible in github

This feature is controled by 2 dynamic config properties.
- `system.allIsolationGroups`: This property provides the list of available zones within a region.
- `system.enableTasklistIsolation`: This property enables Zonal Isolation at domain level.
It’s important to note that any update to the `system.allIsolationGroups` property requires a restart of the cadence-matching service for the changes to take effect. This ensures that the new zone configuration is properly loaded and applied. However, the `system.enableTasklistIsolation` property can be updated dynamically without requiring a restart, making it more flexible for enabling or disabling Zonal Isolation on a per-domain basis.
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requiring a restart

@davidporter-id-au After your changes for auto discovery, will it require restarting matching to recognize changes to system.allIsolationGroups ?

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no

@Shaddoll Shaddoll merged commit 2a30577 into master Oct 14, 2024
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@Shaddoll Shaddoll deleted the isolation branch October 14, 2024 20:23
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5 participants