diff --git a/dragonfly-client-storage/src/client/mod.rs b/dragonfly-client-storage/src/client/mod.rs
index c00694e7..c2d8bc5a 100644
--- a/dragonfly-client-storage/src/client/mod.rs
+++ b/dragonfly-client-storage/src/client/mod.rs
@@ -20,10 +20,10 @@ pub mod tcp;
 use std::time::Duration;
 
 /// DEFAULT_SEND_BUFFER_SIZE is the default size of the send buffer for network connections.
-const DEFAULT_SEND_BUFFER_SIZE: usize = 4 * 1024 * 1024;
+const DEFAULT_SEND_BUFFER_SIZE: usize = 16 * 1024 * 1024;
 
 /// DEFAULT_RECV_BUFFER_SIZE is the default size of the receive buffer for network connections.
-const DEFAULT_RECV_BUFFER_SIZE: usize = 4 * 1024 * 1024;
+const DEFAULT_RECV_BUFFER_SIZE: usize = 16 * 1024 * 1024;
 
 /// DEFAULT_KEEPALIVE_INTERVAL is the default interval for sending keepalive messages.
 const DEFAULT_KEEPALIVE_INTERVAL: Duration = Duration::from_secs(5);
diff --git a/dragonfly-client-storage/src/client/tcp.rs b/dragonfly-client-storage/src/client/tcp.rs
index 2a4b8da0..ba77eea9 100644
--- a/dragonfly-client-storage/src/client/tcp.rs
+++ b/dragonfly-client-storage/src/client/tcp.rs
@@ -179,6 +179,15 @@ impl TCPClient {
         socket.set_tcp_keepalive(
             &TcpKeepalive::new().with_interval(super::DEFAULT_KEEPALIVE_INTERVAL),
         )?;
+        #[cfg(target_os = "linux")]
+        {
+            use tracing::warn;
+            if let Err(err) = socket.set_tcp_fastopen(true) {
+                warn!("failed to set tcp fast open: {}", err);
+            } else {
+                info!("set tcp fast open");
+            }
+        }
 
         let (reader, mut writer) = stream.into_split();
         writer.write_all(&request).await.inspect_err(|err| {
diff --git a/dragonfly-client-storage/src/server/mod.rs b/dragonfly-client-storage/src/server/mod.rs
index c00694e7..c2d8bc5a 100644
--- a/dragonfly-client-storage/src/server/mod.rs
+++ b/dragonfly-client-storage/src/server/mod.rs
@@ -20,10 +20,10 @@ pub mod tcp;
 use std::time::Duration;
 
 /// DEFAULT_SEND_BUFFER_SIZE is the default size of the send buffer for network connections.
-const DEFAULT_SEND_BUFFER_SIZE: usize = 4 * 1024 * 1024;
+const DEFAULT_SEND_BUFFER_SIZE: usize = 16 * 1024 * 1024;
 
 /// DEFAULT_RECV_BUFFER_SIZE is the default size of the receive buffer for network connections.
-const DEFAULT_RECV_BUFFER_SIZE: usize = 4 * 1024 * 1024;
+const DEFAULT_RECV_BUFFER_SIZE: usize = 16 * 1024 * 1024;
 
 /// DEFAULT_KEEPALIVE_INTERVAL is the default interval for sending keepalive messages.
 const DEFAULT_KEEPALIVE_INTERVAL: Duration = Duration::from_secs(5);
diff --git a/dragonfly-client-storage/src/server/tcp.rs b/dragonfly-client-storage/src/server/tcp.rs
index 586d1b95..84600cd1 100644
--- a/dragonfly-client-storage/src/server/tcp.rs
+++ b/dragonfly-client-storage/src/server/tcp.rs
@@ -100,10 +100,17 @@ impl TCPServer {
         #[cfg(target_os = "linux")]
         {
             use tracing::warn;
-            if let Err(err) = socket.set_tcp_congestion("bbr".as_bytes()) {
+            if let Err(err) = socket.set_tcp_congestion("cubic".as_bytes()) {
                 warn!("failed to set tcp congestion: {}", err);
+            } else {
+                info!("set tcp congestion to cubic");
+            }
+
+            if let Err(err) = socket.set_tcp_fastopen(true) {
+                warn!("failed to set tcp fast open: {}", err);
+            } else {
+                info!("set tcp fast open");
             }
-            info!("set tcp congestion to bbr");
         }
 
         socket.bind(&self.addr.into())?;