From e1456c1c0434413cbc5276d2eaaee217122e4ea8 Mon Sep 17 00:00:00 2001
From: Serge Tupchii <serge.tupchii@protonmail.com>
Date: Tue, 12 Sep 2023 22:28:46 +0300
Subject: [PATCH] feat(emqx_conf_schema): add node.default_bootstrap_batch_size
 config parameter

---
 apps/emqx_conf/src/emqx_conf_schema.erl | 10 ++++++++++
 rel/i18n/emqx_conf_schema.hocon         | 10 ++++++++++
 2 files changed, 20 insertions(+)

diff --git a/apps/emqx_conf/src/emqx_conf_schema.erl b/apps/emqx_conf/src/emqx_conf_schema.erl
index 94cdd2ecd..c5ae33f1d 100644
--- a/apps/emqx_conf/src/emqx_conf_schema.erl
+++ b/apps/emqx_conf/src/emqx_conf_schema.erl
@@ -674,6 +674,16 @@ fields("node") ->
                     default => #{}
                 }
             )},
+        {"default_bootstrap_batch_size",
+            sc(
+                pos_integer(),
+                #{
+                    mapping => "mria.bootstrap_batch_size",
+                    importance => ?IMPORTANCE_HIDDEN,
+                    default => 500,
+                    desc => ?DESC(db_default_bootstrap_batch_size)
+                }
+            )},
         {"broker_pool_size",
             sc(
                 pos_integer(),
diff --git a/rel/i18n/emqx_conf_schema.hocon b/rel/i18n/emqx_conf_schema.hocon
index 442df1fa8..547acd607 100644
--- a/rel/i18n/emqx_conf_schema.hocon
+++ b/rel/i18n/emqx_conf_schema.hocon
@@ -776,6 +776,16 @@ the default is to use the value set in <code>db.default_shard_transport</code>."
 db_shard_transports.label:
 """Shard Transports"""
 
+db_default_bootstrap_batch_size.desc:
+"""The number of built-in database table records to be pushed in one chunk from a core node to a replicant node during bootstrap.
+The bootstrapping occurs when a new replicant node is added to the cluster or an existing replicant node reconnects to a core one.
+Increasing this value may greatly reduce a replicant node startup time, especially when EMQX cluster interconnect network latency is high
+and EMQX built-in database holds large amount of data, e.g. when the number of subscriptions is high.
+Defaults to 500."""
+
+db_default_bootstrap_batch_size.label:
+"""Default Bootstrap Batch Size"""
+
 node_broker_pool_size.desc:
 """The number of workers in emqx_broker pool. Increasing this value may improve performance
 by enhancing parallelism, especially when EMQX cluster interconnect network latency is high.