From 71a3fb485332e1a652fdc6e32dd84656fcd5fc4e Mon Sep 17 00:00:00 2001
From: Matt Harrison <matt@harrison.consulting>
Date: Wed, 7 May 2025 22:11:38 -0400
Subject: [PATCH 1/2] doc: add Milvus environment variables and descriptions

---
 docs/getting-started/env-configuration.md | 37 +++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/docs/getting-started/env-configuration.md b/docs/getting-started/env-configuration.md
index 961eb9d..06521c2 100644
--- a/docs/getting-started/env-configuration.md
+++ b/docs/getting-started/env-configuration.md
@@ -1066,6 +1066,43 @@ modeling files for reranking.
 - Default: `None`
 - Description: Specifies an optional connection token for Milvus.
 
+#### `MILVUS_INDEX_TYPE`
+
+- Type: `str`
+- Default: `AUTOINDEX`
+- Options: `AUTOINDEX`, `FLAT`, `IVF_FLAT`, `HNSW`
+- Description: Specifies the index type to use when creating a new collection in Milvus. `AUTOINDEX` is generally recommended for Milvus standalone. `HNSW` may offer better performance but typically requires a clustered Milvus setup.
+- Persistence: This environment variable is a `PersistentConfig` variable.
+
+#### `MILVUS_METRIC_TYPE`
+
+- Type: `str`
+- Default: `COSINE`
+- Options: `COSINE`, `IP`, `L2`
+- Description: Specifies the metric type for vector similarity search in Milvus.
+- Persistence: This environment variable is a `PersistentConfig` variable.
+
+#### `MILVUS_HNSW_M`
+
+- Type: `int`
+- Default: `16`
+- Description: Specifies the `M` parameter for the HNSW index type in Milvus. This influences the number of bi-directional links created for each new element during construction. Only applicable if `MILVUS_INDEX_TYPE` is `HNSW`.
+- Persistence: This environment variable is a `PersistentConfig` variable.
+
+#### `MILVUS_HNSW_EFCONSTRUCTION`
+
+- Type: `int`
+- Default: `100`
+- Description: Specifies the `efConstruction` parameter for the HNSW index type in Milvus. This influences the size of the dynamic list for the nearest neighbors during index construction. Only applicable if `MILVUS_INDEX_TYPE` is `HNSW`.
+- Persistence: This environment variable is a `PersistentConfig` variable.
+
+#### `MILVUS_IVF_FLAT_NLIST`
+
+- Type: `int`
+- Default: `128`
+- Description: Specifies the `nlist` parameter for the IVF_FLAT index type in Milvus. This is the number of cluster units. Only applicable if `MILVUS_INDEX_TYPE` is `IVF_FLAT`.
+- Persistence: This environment variable is a `PersistentConfig` variable.
+
 ### OpenSearch
 
 #### `OPENSEARCH_CERT_VERIFY`

From 630eab7d4fbd8aeef4ce6849e08fc200b8f6676f Mon Sep 17 00:00:00 2001
From: Matt Harrison <matt@harrison.consulting>
Date: Thu, 8 May 2025 07:24:13 -0400
Subject: [PATCH 2/2] doc: update Milvus environment variable for backwards
 compatibility

---
 docs/getting-started/env-configuration.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/getting-started/env-configuration.md b/docs/getting-started/env-configuration.md
index 06521c2..aef9e7c 100644
--- a/docs/getting-started/env-configuration.md
+++ b/docs/getting-started/env-configuration.md
@@ -1069,7 +1069,7 @@ modeling files for reranking.
 #### `MILVUS_INDEX_TYPE`
 
 - Type: `str`
-- Default: `AUTOINDEX`
+- Default: `HNSW`
 - Options: `AUTOINDEX`, `FLAT`, `IVF_FLAT`, `HNSW`
 - Description: Specifies the index type to use when creating a new collection in Milvus. `AUTOINDEX` is generally recommended for Milvus standalone. `HNSW` may offer better performance but typically requires a clustered Milvus setup.
 - Persistence: This environment variable is a `PersistentConfig` variable.