diff --git a/backend/src/controller/crypto.rs b/backend/src/controller/crypto.rs
index 174fa0e7..dc01762f 100644
--- a/backend/src/controller/crypto.rs
+++ b/backend/src/controller/crypto.rs
@@ -59,7 +59,7 @@ impl CryptoController {
 
         let signing_key = SigningKey::random(&mut OsRng);
 
-        let verifying_key = signing_key.verifying_key().clone();
+        let verifying_key = *signing_key.verifying_key();
 
         Self {
             salt,
diff --git a/backend/src/controller/judger/route/direct.rs b/backend/src/controller/judger/route/direct.rs
index 5f4e7af1..13579233 100644
--- a/backend/src/controller/judger/route/direct.rs
+++ b/backend/src/controller/judger/route/direct.rs
@@ -2,18 +2,19 @@ use super::{ConnectionDetail, Error, Routable, RouteStatus};
 use crate::init::config::Judger;
 use tonic::transport::Uri;
 
-pub struct StaticRouter {
+pub struct StaticRouter<const REUSE:bool> {
     uri: Option<String>,
     secret: Option<String>,
 }
 
 #[tonic::async_trait]
-impl Routable for StaticRouter {
+impl<const REUSE:bool> Routable for StaticRouter<REUSE> {
     async fn route(&mut self) -> Result<RouteStatus, Error> {
         Ok(match self.uri.take() {
             Some(x) => RouteStatus::NewConnection(ConnectionDetail {
                 uri: x,
                 secret: self.secret.clone(),
+                reuse:  REUSE,
             }),
             None => RouteStatus::Never,
         })
diff --git a/backend/src/controller/judger/route/mod.rs b/backend/src/controller/judger/route/mod.rs
index 07f3e0e5..2e94fd22 100644
--- a/backend/src/controller/judger/route/mod.rs
+++ b/backend/src/controller/judger/route/mod.rs
@@ -52,6 +52,7 @@ impl Interceptor for BasicAuthInterceptor {
 pub struct ConnectionDetail {
     pub uri: String,
     pub secret: Option<String>,
+    pub reuse: bool,
 }
 
 impl ConnectionDetail {
@@ -72,6 +73,7 @@ impl ConnectionDetail {
 pub struct ConnGuard {
     upstream: Arc<Upstream>,
     conn: Option<JudgerIntercept>,
+    reuse: bool,
 }
 
 impl ConnGuard {
@@ -99,7 +101,9 @@ impl std::ops::Deref for ConnGuard {
 impl Drop for ConnGuard {
     fn drop(&mut self) {
         self.upstream.healthy.fetch_add(-2, Ordering::Acquire);
-        self.upstream.clients.push(self.conn.take().unwrap());
+        if self.reuse{
+            self.upstream.clients.push(self.conn.take().unwrap());
+        }
     }
 }
 
@@ -170,7 +174,13 @@ impl Router {
                     ));
                 }
                 config::JudgerType::Static => {
-                    tokio::spawn(discover::<direct::StaticRouter>(
+                    tokio::spawn(discover::<direct::StaticRouter<true>>(
+                        config,
+                        Arc::downgrade(&self_),
+                    ));
+                }
+                config::JudgerType::LoadBalanced => {
+                    tokio::spawn(discover::<direct::StaticRouter<false>>(
                         config,
                         Arc::downgrade(&self_),
                     ));
@@ -250,6 +260,7 @@ impl Upstream {
         };
 
         Ok(ConnGuard {
+            reuse: self.connection.reuse,
             upstream: self,
             conn: Some(conn),
         })
diff --git a/backend/src/controller/judger/route/swarm.rs b/backend/src/controller/judger/route/swarm.rs
index 3e0205cb..924873ff 100644
--- a/backend/src/controller/judger/route/swarm.rs
+++ b/backend/src/controller/judger/route/swarm.rs
@@ -36,6 +36,7 @@ impl Routable for DockerRouter {
                 return Ok(RouteStatus::NewConnection(ConnectionDetail {
                     uri,
                     secret: self.secret.clone(),
+                    reuse:true,
                 }));
             }
         }
diff --git a/backend/src/init/config.rs b/backend/src/init/config.rs
index 532ca477..55e19bd7 100644
--- a/backend/src/init/config.rs
+++ b/backend/src/init/config.rs
@@ -60,6 +60,7 @@ pub struct Judger {
 pub enum JudgerType {
     Docker,
     Static,
+    LoadBalanced
 }
 
 impl Default for JudgerType {