Add Ashish Singh as maintainer

[Bukhtawar]

I have nominated, and maintainers have agreed to add Ashish Singh (@ashking94) as a co-maintainer, who kindly accepted.

Ashish is an active contributor of OpenSearch project and has extensively contributed in various remote-backed storage features which has been launched successfully for users, with most of his recent works focused on improving performance, resiliency and scalability of the remote store and it’s interactions. Apart from this, he has proactively contributed to identifying critical bugs, resolving them and improving documentations around the same. Ashish is pretty active in the OpenSearch Storage bi-weekly triages and has consistently exercised sound judgement in triaging and prioritising the issues.

Ashish, has authored 147 pull requests, reviewed 179 pull requests and created 184 issues in the OpenSearch repo last 18 months, with nearly 47 of them being contributed in the last 3 months. Apart from this, Ashish has contributed to 10 PRs to the documentation website and contributed another 5 PRs to the opensearch-build repo. Based on his historical contributions, I am reasonably confident, that Ashish will be a valuable addition as a maintainer of OpenSearch and will help to contribute to our success going forward.

Notable Proposals

1. Primary term validation with remote store for replicas (No-op replication):
   a) [Meta] NoOp replication for remote translogs with NRT segment replication #4507
   b) [Remote Store] Primary term validation with replicas - New approach POC #5033
   c) [Discuss] Writes on NRT Replica with Remote Translog  #3706 (comment)
   d) [Remote Translog] Phase 1 - Fail requests on isolated shard if no successful leader checker call in last x minutes to enable auto restore #6737
   e) [Feature Proposal] Enhancement of Repository Plugin #6354
   f) Back pressure for lagging remote segments upload #6851
   g) Remote refresh segments backpressure testing #7225
   h) Prevent segment merges if the segments upload is lagging on the remote store #7477
   i) Evaluate sync vs async segments upload to remote store (in RemoteStoreRefreshListener) #9024
   j) Remote store performance run for different workloads, cluster configurations and test configurations #9790
   k) Optimize read write lock constructs during translog upload to remote store #10013
   l) Optimised prefix pattern per shard for remote store data and metadata files for higher throughput #12567
   m) [META] Optimised prefix pattern per shard for remote store data and metadata files for higher throughput #12589.

Notable Pull-requests

1. Primary term validation & updated peer recovery flows:
   a) [Remote Store] Change behaviour in replica recovery for remote translog enabled indices #4318
   b) Remove PRRL creation/deletion in peer recovery of remote store enabled replica #4954
   c) Add transport action for primary term validation for remote-backed indices #5616
   d) Enhance CheckpointState to support no-op replication #5282
2. Performance optimisation for remote store:
   a) Downgrade write lock to read lock before translog upload to remote store #10135
   b) Batch translog sync/upload per x ms for remote-backed indexes #5854
   c) [Remote Store] Optimize segments metadata upload #7905
3. Remote store segments upload backpressure:
   a) Add remote refresh segment pressure service, settings and tracker #7227
   b) [Remote Segments] Retry segment uploads to remote store on failure #7400
   c) [Remote segments] Add backpressure in write path on segments lag between local and remote store #7459
   d) [Remote segments] Add backpressure in write path on segments lag between local and remote store (#7459) #7720
   e) Fix local segments stats update in RemoteStoreRefreshListener #8758
4. Remote store relocation & peer recovery:
   a) [Remote Store] Handoff refreshes, translog uploads during relocation from old to new primary #11330
   b) [Remote Store] Fix relocation failure due to transport receive timeout #10761
   c) Use CloseableRetryableRefreshListener to drain ongoing after refresh tasks on relocation #8683
   d) Recover all translogs during relocation handoff for remote-backed indexes #6314
5. Optimised prefix pattern per shard for remote store data and metadata files for higher throughput:
   a) Introduce remote store hash algorithm in customData in IndexMetadata #12986
   b) Update Shallow Snapshot flows to support remote path type & hash algo #12988
   c) Add implementation for remote store path types #13103
   d) Upload remote paths during index creation or full cluster upload #13150

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
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[Bukhtawar]

Pinging @opensearch-project/admin for help with permissions

[peternied]

@ashking94 Welcome to the OpenSearch maintainers, if you would like to customize your review assignment/notifications please create a pull request to update .github/CODEOWNERS, there is an example available [1].

Unless you make changes you will not be automatically added to review any pull requests.

• [1] Personalize code ownership areas #11600

[ashking94]

Thanks @peternied for sharing this. To start with, I will prefer getting informed of all PRs, and later will go with customisations.