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Doc for Head HA #544

Merged
merged 22 commits into from
Mar 29, 2025
Merged

Doc for Head HA #544

merged 22 commits into from
Mar 29, 2025

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weiquanlee
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@weiquanlee weiquanlee commented Mar 26, 2025

Why are these changes needed?

Add feature Head HA,related to Issue #503

Related issue number

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  • I've signed off every commit(by using the -s flag, i.e., git commit -s) in this PR.
  • I've run scripts/format.sh to lint the changes in this PR.
  • I've included any doc changes needed for https://docs.ray.io/en/master/.
    • I've added any new APIs to the API Reference. For example, if I added a
      method in Tune, I've added it in doc/source/tune/api/ under the
      corresponding .rst file.
  • I've made sure the tests are passing. Note that there might be a few flaky tests, see the recent failures at https://flakey-tests.ray.io/
  • Testing Strategy
    • Unit tests
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    • This PR is not tested :(

@weiquanlee weiquanlee requested review from wumuzi520 and xsuler March 26, 2025 09:42
Head High-Availability Feature
====================

Head High-Availability Feature (Head HA), which reduces the impact of head-failover in ray clusters by deploying multi heads.
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'ray clusters ' maybe 'rayclusters', it represents a specific object.


3. **Leader Node Activation:** Only the node that successfully acquires leadership proceeds with starting critical processes such as the `gcs_server` and `dashboard`.

4. **Standby Node Behavior:** Nodes that fail to gain leadership remain in the competition loop as standby nodes until the leader node encounters a failure.
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may encounter Eviction or network issue

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LGTM

@xsuler xsuler merged commit 9441f54 into main Mar 29, 2025
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3 participants