diff --git a/src/meta-srv/src/handler.rs b/src/meta-srv/src/handler.rs
index 92916838d8..9cfd4e6079 100644
--- a/src/meta-srv/src/handler.rs
+++ b/src/meta-srv/src/handler.rs
@@ -12,9 +12,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+use std::cmp::Ordering;
 use std::collections::{BTreeMap, HashSet};
 use std::fmt::{Debug, Display};
-use std::ops::Range;
+use std::ops::Bound;
 use std::sync::{Arc, Mutex};
 use std::time::{Duration, Instant};
 
@@ -136,6 +137,26 @@ pub struct PusherId {
     pub id: u64,
 }
 
+impl PartialEq for PusherId {
+    fn eq(&self, other: &Self) -> bool {
+        self.role as i32 == other.role as i32 && self.id == other.id
+    }
+}
+
+impl Eq for PusherId {}
+
+impl PartialOrd for PusherId {
+    fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
+        Some(self.cmp(other))
+    }
+}
+
+impl Ord for PusherId {
+    fn cmp(&self, other: &Self) -> Ordering {
+        (self.role as i32, self.id).cmp(&(other.role as i32, other.id))
+    }
+}
+
 impl Debug for PusherId {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         write!(f, "{:?}-{}", self.role, self.id)
@@ -153,8 +174,11 @@ impl PusherId {
         Self { role, id }
     }
 
-    pub fn string_key(&self) -> String {
-        format!("{}-{}", self.role as i32, self.id)
+    fn role_range(role: Role) -> (Bound<Self>, Bound<Self>) {
+        (
+            Bound::Included(Self::new(role, u64::MIN)),
+            Bound::Included(Self::new(role, u64::MAX)),
+        )
     }
 }
 
@@ -214,7 +238,7 @@ impl Pusher {
 
 /// The group of heartbeat pushers.
 #[derive(Clone, Default)]
-pub struct Pushers(Arc<RwLock<BTreeMap<String, Pusher>>>);
+pub struct Pushers(Arc<RwLock<BTreeMap<PusherId, Pusher>>>);
 
 impl Pushers {
     async fn push(
@@ -222,11 +246,12 @@ impl Pushers {
         pusher_id: PusherId,
         mailbox_message: MailboxMessage,
     ) -> Result<DeregisterSignalReceiver> {
-        let pusher_id = pusher_id.string_key();
         let pushers = self.0.read().await;
         let pusher = pushers
             .get(&pusher_id)
-            .context(error::PusherNotFoundSnafu { pusher_id })?;
+            .with_context(|| error::PusherNotFoundSnafu {
+                pusher_id: pusher_id.to_string(),
+            })?;
 
         pusher
             .push(HeartbeatResponse {
@@ -239,14 +264,10 @@ impl Pushers {
         Ok(pusher.deregister_signal_receiver.clone())
     }
 
-    async fn broadcast(
-        &self,
-        range: Range<String>,
-        mailbox_message: &MailboxMessage,
-    ) -> Result<()> {
+    async fn broadcast(&self, role: Role, mailbox_message: &MailboxMessage) -> Result<()> {
         let pushers = self.0.read().await;
         let pushers = pushers
-            .range(range)
+            .range(PusherId::role_range(role))
             .map(|(_, value)| value)
             .collect::<Vec<_>>();
         let mut results = Vec::with_capacity(pushers.len());
@@ -271,12 +292,12 @@ impl Pushers {
         Ok(())
     }
 
-    pub(crate) async fn insert(&self, pusher_id: String, pusher: Pusher) -> Option<Pusher> {
+    pub(crate) async fn insert(&self, pusher_id: PusherId, pusher: Pusher) -> Option<Pusher> {
         self.0.write().await.insert(pusher_id, pusher)
     }
 
-    async fn remove(&self, pusher_id: &str) -> Option<Pusher> {
-        self.0.write().await.remove(pusher_id)
+    async fn remove(&self, pusher_id: PusherId) -> Option<Pusher> {
+        self.0.write().await.remove(&pusher_id)
     }
 }
 
@@ -308,12 +329,12 @@ impl HeartbeatHandlerGroup {
     pub async fn register_pusher(&self, pusher_id: PusherId, pusher: Pusher) {
         METRIC_META_HEARTBEAT_CONNECTION_NUM.inc();
         info!("Pusher register: {}", pusher_id);
-        let _ = self.pushers.insert(pusher_id.string_key(), pusher).await;
+        let _ = self.pushers.insert(pusher_id, pusher).await;
     }
 
     /// Deregisters the heartbeat response [`Pusher`] with the given key from the group.
     pub async fn deregister_push(&self, pusher_id: PusherId) {
-        if self.pushers.remove(&pusher_id.string_key()).await.is_some() {
+        if self.pushers.remove(pusher_id).await.is_some() {
             info!("Pusher unregister: {}", pusher_id);
             METRIC_META_HEARTBEAT_CONNECTION_NUM.dec();
         }
@@ -323,7 +344,7 @@ impl HeartbeatHandlerGroup {
     /// Returns whether the group contains the heartbeat response [`Pusher`] with the given key.
     pub async fn contains_pusher(&self, pusher_id: &PusherId) -> bool {
         let pushers = self.pushers.0.read().await;
-        pushers.contains_key(&pusher_id.string_key())
+        pushers.contains_key(pusher_id)
     }
 
     /// Returns the [`Pushers`] of the group.
@@ -531,7 +552,7 @@ impl Mailbox for HeartbeatMailbox {
     }
 
     async fn broadcast(&self, ch: &BroadcastChannel, msg: &MailboxMessage) -> Result<()> {
-        self.pushers.broadcast(ch.pusher_range(), msg).await
+        self.pushers.broadcast(ch.role(), msg).await
     }
 
     async fn on_recv(&self, id: MessageId, maybe_msg: Result<MailboxMessage>) -> Result<()> {
@@ -861,6 +882,7 @@ impl HeartbeatHandlerGroupBuilderCustomizer for DefaultHeartbeatHandlerGroupBuil
 mod tests {
 
     use std::assert_matches;
+    use std::collections::BTreeMap;
     use std::sync::Arc;
     use std::time::Duration;
 
@@ -936,6 +958,62 @@ mod tests {
         (mailbox, receiver)
     }
 
+    #[test]
+    fn test_pusher_id_role_range() {
+        let mut pushers = BTreeMap::new();
+        pushers.insert(PusherId::new(Role::Datanode, u64::MAX), "datanode");
+        pushers.insert(PusherId::new(Role::Frontend, u64::MIN), "frontend-min");
+        pushers.insert(PusherId::new(Role::Frontend, u64::MAX), "frontend-max");
+        pushers.insert(PusherId::new(Role::Flownode, u64::MIN), "flownode");
+
+        let frontend_pushers = pushers
+            .range(PusherId::role_range(Role::Frontend))
+            .map(|(_, value)| *value)
+            .collect::<Vec<_>>();
+
+        assert_eq!(frontend_pushers, vec!["frontend-min", "frontend-max"]);
+    }
+
+    #[tokio::test]
+    async fn test_pushers_broadcast_by_role() {
+        let pushers = Pushers::default();
+        let (datanode_tx, mut datanode_rx) = mpsc::channel(1);
+        let (frontend_tx, mut frontend_rx) = mpsc::channel(1);
+        let (flownode_tx, mut flownode_rx) = mpsc::channel(1);
+
+        pushers
+            .insert(
+                PusherId::new(Role::Datanode, u64::MAX),
+                Pusher::new(datanode_tx),
+            )
+            .await;
+        pushers
+            .insert(PusherId::new(Role::Frontend, 1), Pusher::new(frontend_tx))
+            .await;
+        pushers
+            .insert(
+                PusherId::new(Role::Flownode, u64::MIN),
+                Pusher::new(flownode_tx),
+            )
+            .await;
+
+        let msg = MailboxMessage {
+            id: 42,
+            subject: "broadcast-test".to_string(),
+            timestamp_millis: 123,
+            ..Default::default()
+        };
+
+        pushers.broadcast(Role::Frontend, &msg).await.unwrap();
+
+        let received = frontend_rx.recv().await.unwrap().unwrap();
+        let mailbox_message = received.mailbox_message.unwrap();
+        assert_eq!(mailbox_message.id, 0);
+        assert_eq!(mailbox_message.subject, "broadcast-test");
+        assert!(datanode_rx.try_recv().is_err());
+        assert!(flownode_rx.try_recv().is_err());
+    }
+
     #[test]
     fn test_handler_group_builder() {
         let group = HeartbeatHandlerGroupBuilder::new(Pushers::default())
diff --git a/src/meta-srv/src/procedure/test_util.rs b/src/meta-srv/src/procedure/test_util.rs
index 5bf60fe32e..318a276676 100644
--- a/src/meta-srv/src/procedure/test_util.rs
+++ b/src/meta-srv/src/procedure/test_util.rs
@@ -66,7 +66,7 @@ impl MailboxContext {
     ) {
         let pusher_id = channel.pusher_id();
         let pusher = Pusher::new(tx);
-        let _ = self.pushers.insert(pusher_id.string_key(), pusher).await;
+        let _ = self.pushers.insert(pusher_id, pusher).await;
     }
 
     pub fn mailbox(&self) -> &MailboxRef {
diff --git a/src/meta-srv/src/service/mailbox.rs b/src/meta-srv/src/service/mailbox.rs
index 86b631998b..f3fbdcbffc 100644
--- a/src/meta-srv/src/service/mailbox.rs
+++ b/src/meta-srv/src/service/mailbox.rs
@@ -13,7 +13,6 @@
 // limitations under the License.
 
 use std::fmt::{Display, Formatter};
-use std::ops::Range;
 use std::pin::Pin;
 use std::sync::Arc;
 use std::task::{Context, Poll};
@@ -69,20 +68,11 @@ pub enum BroadcastChannel {
 }
 
 impl BroadcastChannel {
-    pub(crate) fn pusher_range(&self) -> Range<String> {
+    pub(crate) fn role(&self) -> Role {
         match self {
-            BroadcastChannel::Datanode => Range {
-                start: format!("{}-", Role::Datanode as i32),
-                end: format!("{}-", Role::Frontend as i32),
-            },
-            BroadcastChannel::Frontend => Range {
-                start: format!("{}-", Role::Frontend as i32),
-                end: format!("{}-", Role::Flownode as i32),
-            },
-            BroadcastChannel::Flownode => Range {
-                start: format!("{}-", Role::Flownode as i32),
-                end: format!("{}-", Role::Flownode as i32 + 1),
-            },
+            BroadcastChannel::Datanode => Role::Datanode,
+            BroadcastChannel::Frontend => Role::Frontend,
+            BroadcastChannel::Flownode => Role::Flownode,
         }
     }
 }
@@ -219,19 +209,10 @@ mod tests {
     use super::*;
 
     #[test]
-    fn test_channel_pusher_range() {
-        assert_eq!(
-            BroadcastChannel::Datanode.pusher_range(),
-            ("0-".to_string().."1-".to_string())
-        );
-        assert_eq!(
-            BroadcastChannel::Frontend.pusher_range(),
-            ("1-".to_string().."2-".to_string())
-        );
-        assert_eq!(
-            BroadcastChannel::Flownode.pusher_range(),
-            ("2-".to_string().."3-".to_string())
-        );
+    fn test_broadcast_channel_role() {
+        assert_eq!(BroadcastChannel::Datanode.role(), Role::Datanode);
+        assert_eq!(BroadcastChannel::Frontend.role(), Role::Frontend);
+        assert_eq!(BroadcastChannel::Flownode.role(), Role::Flownode);
     }
 
     #[tokio::test]