[OVI3D0]

Description

Adds five exact-count full-text operations to the default Big5 test procedure:

• high-frequency Boolean AND and OR counts over the message field
• prefix, wildcard, and regexp counts over message patterns selected from the live Big5 term dictionary

Each operation uses size: 0, track_total_hits: true, and request_cache=false so the benchmark exercises exhaustive collection instead of top-k pruning or cached whole responses. This fills the routine performance coverage gap highlighted by opensearch-project/OpenSearch#23117, including bulk postings iteration and postings reuse during multi-term expansion.

The multi-term patterns each expand beyond the 1,024 Boolean-clause limit per shard when inspected with a scoring Boolean rewrite, confirming that they exercise substantial term expansion.

Issues Resolved

Related to opensearch-project/OpenSearch#23117 and opensearch-project/OpenSearch#23107.

Testing

• New functionality includes testing

Local validation:

• opensearch-benchmark list workloads --workload-path <checkout>/big5 --distribution-version 3.8.0
• opensearch-benchmark info --workload-path <checkout>/big5 --test-procedure big5 --include-tasks high-frequency-and-count,high-frequency-or-count,prefix-count,wildcard-count,regexp-count

Full-corpus validation:

• Ran OSB against an existing Amazon OpenSearch Service 3.5 domain containing the complete 116,000,000-document Big5 index.

Backport to Branches:

• 6
• 7
• 1
• 2
• 3

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