From 3a2593f484389100a50def25f6df80d8dd898074 Mon Sep 17 00:00:00 2001
From: Nikolett Nagy <61757742+nikinagy@users.noreply.github.com>
Date: Wed, 15 Nov 2023 09:08:08 +0000
Subject: [PATCH] CORE-17355 - Reduce number of p2p e2e sessions maintained per
 pair of vnodes (#1307)

In order to increase our performance, this PR reduces number of p2p e2e sessions maintained per pair of vnodes:
for member <-> MGM communication reduce to 1
for member <-> member communication reduce to 1
---
 .../1.0/corda.p2p.linkManager.json            | 25 ++++++++++++++++---
 1 file changed, 22 insertions(+), 3 deletions(-)

diff --git a/data/config-schema/src/main/resources/net/corda/schema/configuration/p2p.linkManager/1.0/corda.p2p.linkManager.json b/data/config-schema/src/main/resources/net/corda/schema/configuration/p2p.linkManager/1.0/corda.p2p.linkManager.json
index 5177b39dba..eafdd208e2 100644
--- a/data/config-schema/src/main/resources/net/corda/schema/configuration/p2p.linkManager/1.0/corda.p2p.linkManager.json
+++ b/data/config-schema/src/main/resources/net/corda/schema/configuration/p2p.linkManager/1.0/corda.p2p.linkManager.json
@@ -90,11 +90,30 @@
       "minimum": 500
     },
     "sessionsPerPeer": {
-      "description": "The number of actively maintained sessions between two peers.",
-      "type": "integer",
-      "default": 4,
+      "description": "Deprecated field, numOfSessionsPerPeer should be used instead. The number of actively maintained sessions between two peers.",
+      "type": ["integer", "null"],
+      "default": null,
       "minimum": 1
     },
+    "numOfSessionsPerPeer": {
+      "description": "The number of actively maintained sessions between two peers.",
+      "type": "object",
+      "default": {},
+      "properties": {
+        "forMgm": {
+          "description": "The number of actively maintained sessions between two peers if one of them is an MGM. Communication between an MGM and a member is not considered critical and so the default value of 1 is recommended to improve performance.",
+          "type": "integer",
+          "default": 1,
+          "minimum": 1
+        },
+        "forMembers": {
+          "description": "The number of actively maintained sessions between two peers if both peers are members. The default value of 2 is recommended because the chance of both sessions failing on the same link manager is relatively low. If high-availability is critical, R3 recommends deploying multiple link manager instances instead.",
+          "type": "integer",
+          "default": 2,
+          "minimum": 1
+        }
+      }
+    },
     "revocationCheck": {
       "type": "object",
       "default": {},