From df7aafa3ec5cab41328f76397aa1d812c74f7620 Mon Sep 17 00:00:00 2001
From: Bingyi Sun <sunbingyi1992@gmail.com>
Date: Wed, 6 Mar 2024 16:03:00 +0800
Subject: [PATCH] fix: filter mmap key when checking index params (#31030)

issue: https://github.com/milvus-io/milvus/issues/31031

Signed-off-by: sunby <sunbingyi1992@gmail.com>
---
 internal/datacoord/index_meta.go | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/internal/datacoord/index_meta.go b/internal/datacoord/index_meta.go
index f2739ff8f348e..209811ded8e76 100644
--- a/internal/datacoord/index_meta.go
+++ b/internal/datacoord/index_meta.go
@@ -184,10 +184,19 @@ func checkParams(fieldIndex *model.Index, req *indexpb.CreateIndexRequest) bool
 	if notEq {
 		return false
 	}
-	if len(fieldIndex.UserIndexParams) != len(req.GetUserIndexParams()) {
+
+	userIndexParamsWithoutMmapKey := make([]*commonpb.KeyValuePair, 0)
+	for _, param := range fieldIndex.UserIndexParams {
+		if param.Key == common.MmapEnabledKey {
+			continue
+		}
+		userIndexParamsWithoutMmapKey = append(userIndexParamsWithoutMmapKey, param)
+	}
+
+	if len(userIndexParamsWithoutMmapKey) != len(req.GetUserIndexParams()) {
 		return false
 	}
-	for _, param1 := range fieldIndex.UserIndexParams {
+	for _, param1 := range userIndexParamsWithoutMmapKey {
 		exist := false
 		for _, param2 := range req.GetUserIndexParams() {
 			if param2.Key == param1.Key && param2.Value == param1.Value {