add lz4

internal/client/client.go

@@ -4,7 +4,6 @@ package client
 
 import (
 	"bytes"
-	"compress/gzip"
 	"encoding/json"
 	"fmt"
 	"io"
@@ -15,6 +14,7 @@ import (
 	"time"
 
 	"github.com/mistifyio/go-zfs"
+	"github.com/pierrec/lz4/v4"
 )
 
 // Client handles snapshot backup operations to a remote server.
@@ -110,7 +110,7 @@ func (c *Client) SendSnapshot(snapshot *zfs.Dataset) error {
 }
 
 // streamToS3 streams a ZFS snapshot to S3 storage via HTTP.
-// The snapshot is optionally compressed with gzip before transmission.
+// The snapshot is optionally compressed with LZ4 before transmission.
 func (c *Client) streamToS3(snapshot *zfs.Dataset, uploadURL, storageKey string) error {
 	fmt.Printf("→ Streaming snapshot to S3...\n")
 
@@ -127,17 +127,18 @@ func (c *Client) streamToS3(snapshot *zfs.Dataset, uploadURL, storageKey string)
 
 	var reader io.Reader = zfsOut
 
-	// Apply gzip compression if enabled
+	// Apply LZ4 compression if enabled
 	if c.config.Compress {
-		fmt.Printf("  Compressing with gzip...\n")
+		fmt.Printf("  Compressing with LZ4...\n")
 		pr, pw := io.Pipe()
-		gzWriter := gzip.NewWriter(pw)
+		lz4Writer := lz4.NewWriter(pw)
+		lz4Writer.Apply(lz4.BlockSizeOption(lz4.BlockSize(4 * 1024 * 1024))) // 4MB blocks for better performance
 
 		go func() {
-			// Copy zfs output to gzip writer
-			io.Copy(gzWriter, zfsOut)
-			// Close gzip writer first to flush footer, then close pipe
-			gzWriter.Close()
+			// Copy zfs output to LZ4 writer
+			io.Copy(lz4Writer, zfsOut)
+			// Close LZ4 writer first to flush, then close pipe
+			lz4Writer.Close()
 			pw.Close()
 		}()
 
@@ -340,3 +341,38 @@ func (c *Client) GetRotationPolicy() (*ServerRotationPolicy, error) {
 
 	return &policyResp, nil
 }
+
+// ChangePassword changes the client's API key on the server.
+// Requires the current API key for authentication and the new key.
+func (c *Client) ChangePassword(newAPIKey string) error {
+	reqBody, _ := json.Marshal(map[string]string{
+		"client_id":   c.config.ClientID,
+		"current_key": c.config.APIKey,
+		"new_key":     newAPIKey,
+	})
+
+	resp, err := http.Post(c.config.ServerURL+"/client/change-password", "application/json", bytes.NewBuffer(reqBody))
+	if err != nil {
+		return fmt.Errorf("failed to change password: %v", err)
+	}
+	defer resp.Body.Close()
+
+	var result struct {
+		Success bool   `json:"success"`
+		Message string `json:"message"`
+	}
+
+	if err := json.NewDecoder(resp.Body).Decode(&result); err != nil {
+		return fmt.Errorf("failed to decode response: %v", err)
+	}
+
+	if !result.Success {
+		return fmt.Errorf("failed to change password: %s", result.Message)
+	}
+
+	// Update local config with new key
+	c.config.APIKey = newAPIKey
+
+	fmt.Printf("✓ Password changed successfully\n")
+	return nil
+}

internal/client/config.go

@@ -19,7 +19,7 @@ type Config struct {
 	ServerURL string `json:"server_url"`
 	// LocalDataset is the ZFS dataset to backup
 	LocalDataset string `json:"local_dataset"`
-	// Compress enables gzip compression for transfers
+	// Compress enables LZ4 compression for transfers
 	Compress bool `json:"compress"`
 }
 

internal/client/snapshot.go

@@ -5,7 +5,6 @@ package client
 
 import (
 	"bytes"
-	"compress/gzip"
 	"encoding/json"
 	"fmt"
 	"io"
@@ -17,6 +16,7 @@ import (
 	"time"
 
 	"github.com/mistifyio/go-zfs"
+	"github.com/pierrec/lz4/v4"
 )
 
 // SnapshotPolicy defines retention settings for automatic snapshots.
@@ -220,17 +220,18 @@ func (c *Client) streamIncrementalToS3(snapshot *zfs.Dataset, base, uploadURL, s
 
 	var reader io.Reader = zfsOut
 
-	// Apply gzip compression if enabled
+	// Apply LZ4 compression if enabled
 	if c.config.Compress {
-		fmt.Printf("  Compressing with gzip...\n")
+		fmt.Printf("  Compressing with LZ4...\n")
 		pr, pw := io.Pipe()
-		gzWriter := gzip.NewWriter(pw)
+		lz4Writer := lz4.NewWriter(pw)
+		lz4Writer.Apply(lz4.BlockSizeOption(lz4.BlockSize(4 * 1024 * 1024))) // 4MB blocks for better performance
 
 		go func() {
-			// Copy zfs output to gzip writer
-			io.Copy(gzWriter, zfsOut)
-			// Close gzip writer first to flush footer, then close pipe
-			gzWriter.Close()
+			// Copy zfs output to LZ4 writer
+			io.Copy(lz4Writer, zfsOut)
+			// Close LZ4 writer first to flush, then close pipe
+			lz4Writer.Close()
 			pw.Close()
 		}()