[FEATURE] Support of dynamic efsearch and nprobs value during search for binary index

[heemin32]

Dynamic efsearch and nprobe is value during query time will be released in 2.16. One of its PR is #1707.

We are also implementing binary index support to be released in 2.16. One of the PR is #1747.

Both of them is not merged in main branch yet. When they are merged, we need to make sure that binary index also support dynamic efsearch and nprobe value.

[navneet1v]

@heemin32 the code is merged for ef_search and nprobes dynamic parameters. Does binary field has picked up the support?

[heemin32]

YES for ef_search.
@junqiu-lei please check if nprobes parameter during query time will be applied for binary ivf index.

[junqiu-lei]

YES for ef_search. @junqiu-lei please check if nprobes parameter during query time will be applied for binary ivf index.

The nprobes parameter support during query time isn't available in binary format feature branch.

Will check once #1784 merge to main

[junqiu-lei]

Verified the dynamic nprobes is workable in query stage when use binary format IVF index:

http://localhost:9200/target-index/_search
{
  "size": 10,
  "query": {
    "knn": {
      "target-field": {
        "vector": [10],
        "k": 3,
        "method_parameters" : {
          "nprobes": 1
        },
        "filter": {
          "range": {
            "price": {
              "gte": 3,
              "lte": 5
            }
          }
        }
      }
    }
  }
}

Result:

{
    "took": 12,
    "timed_out": false,
    "_shards": {
        "total": 1,
        "successful": 1,
        "skipped": 0,
        "failed": 0
    },
    "hits": {
        "total": {
            "value": 1,
            "relation": "eq"
        },
        "max_score": 0.5,
        "hits": [
            {
                "_index": "target-index",
                "_id": "1",
                "_score": 0.5,
                "_source": {
                    "target-field": [
                        2
                    ],
                    "price": 4.4
                }
            }
        ]
    }
}