dump: skip files in trash when backup metadata

cmd/dump.go

@@ -59,6 +59,10 @@ Details: https://juicefs.com/docs/community/metadata_dump_load`,
 				Name:  "fast",
 				Usage: "speedup dump by load all metadata into memory",
 			},
+			&cli.BoolFlag{
+				Name:  "skip-trash",
+				Usage: "skip files in trash",
+			},
 		},
 	}
 }
@@ -105,7 +109,7 @@ func dump(ctx *cli.Context) (err error) {
 	if st := m.Chroot(meta.Background, metaConf.Subdir); st != 0 {
 		return st
 	}
-	if err := m.DumpMeta(w, 1, ctx.Bool("keep-secret-key"), ctx.Bool("fast")); err != nil {
+	if err := m.DumpMeta(w, 1, ctx.Bool("keep-secret-key"), ctx.Bool("fast"), ctx.Bool("skip-trash")); err != nil {
 		return err
 	}
 	logger.Infof("Dump metadata into %s succeed", dst)

cmd/flags.go

@@ -245,6 +245,10 @@ func metaFlags() []cli.Flag {
 			Value: "3600",
 			Usage: "interval (in seconds) to automatically backup metadata in the object storage (0 means disable backup)",
 		},
+		&cli.BoolFlag{
+			Name:  "backup-skip-trash",
+			Usage: "skip files in trash when backup metadata",
+		},
 		&cli.StringFlag{
 			Name:  "heartbeat",
 			Value: "12",

cmd/mount.go

@@ -246,15 +246,16 @@ func expandPathForEmbedded(addr string) string {
 
 func getVfsConf(c *cli.Context, metaConf *meta.Config, format *meta.Format, chunkConf *chunk.Config) *vfs.Config {
 	cfg := &vfs.Config{
-		Meta:           metaConf,
-		Format:         *format,
-		Version:        version.Version(),
-		Chunk:          chunkConf,
-		BackupMeta:     duration(c.String("backup-meta")),
-		Port:           &vfs.Port{DebugAgent: debugAgent, PyroscopeAddr: c.String("pyroscope")},
-		PrefixInternal: c.Bool("prefix-internal"),
-		Pid:            os.Getpid(),
-		PPid:           os.Getppid(),
+		Meta:            metaConf,
+		Format:          *format,
+		Version:         version.Version(),
+		Chunk:           chunkConf,
+		BackupMeta:      duration(c.String("backup-meta")),
+		BackupSkipTrash: c.Bool("backup-skip-trash"),
+		Port:            &vfs.Port{DebugAgent: debugAgent, PyroscopeAddr: c.String("pyroscope")},
+		PrefixInternal:  c.Bool("prefix-internal"),
+		Pid:             os.Getpid(),
+		PPid:            os.Getppid(),
 	}
 	skip_check := os.Getenv("SKIP_BACKUP_META_CHECK") == "true"
 	if !skip_check && cfg.BackupMeta > 0 && cfg.BackupMeta < time.Minute*5 {
@@ -360,7 +361,7 @@ func initBackgroundTasks(c *cli.Context, vfsConf *vfs.Config, metaConf *meta.Con
 		vfsConf.Port.ConsulAddr = c.String("consul")
 	}
 	if !metaConf.ReadOnly && !metaConf.NoBGJob && vfsConf.BackupMeta > 0 {
-		go vfs.Backup(m, blob, vfsConf.BackupMeta)
+		go vfs.Backup(m, blob, vfsConf.BackupMeta, vfsConf.BackupSkipTrash)
 	}
 	if !c.Bool("no-usage-report") {
 		go usage.ReportUsage(m, version.Version())

docs/en/deployment/hadoop_java_sdk.md

@@ -209,6 +209,7 @@ Please refer to the following table to set the relevant parameters of the JuiceF
 | `juicefs.no-usage-report` | `false`       | Whether disable usage reporting. JuiceFS only collects anonymous usage data (e.g. version number), no user or any sensitive data will be collected.                         |
 | `juicefs.no-bgjob`        | `false`       | Disable background jobs (clean-up, backup, etc.)                                                                                                                            |
 | `juicefs.backup-meta`     | 3600          | Interval (in seconds) to automatically backup metadata in the object storage (0 means disable backup)                                                                       |
+|`juicefs.backup-skip-trash`| `false`       | Skip files and directories in trash when backup metadata.                                                                  |
 | `juicefs.heartbeat`       | 12            | Heartbeat interval (in seconds) between client and metadata engine. It's recommended that all clients use the same value.                                                   |
 
 #### Multiple file systems configuration

docs/en/reference/command_reference.md

@@ -384,6 +384,8 @@ juicefs dump redis://localhost sub-meta-dump.json --subdir /dir/in/jfs
 |`FILE`|Export file path, if not specified, it will be exported to standard output. If the filename ends with `.gz`, it will be automatically compressed.|
 |`--subdir=path`|Only export metadata for the specified subdirectory.|
 |`--keep-secret-key` <VersionAdd>1.1</VersionAdd> |Export object storage authentication information, the default is `false`. Since it is exported in plain text, pay attention to data security when using it. If the export file does not contain object storage authentication information, you need to use [`juicefs config`](#config) to reconfigure object storage authentication information after the subsequent import is completed.|
+|`--fast` <VersionAdd>1.2</VersionAdd>|Use more memory to speedup dump.|
+|`--skip-trash` <VersionAdd>1.2</VersionAdd>|Skip files and directories in trash.|
 
 ### `juicefs load` {#load}
 
@@ -628,6 +630,7 @@ juicefs mount redis://localhost /mnt/jfs --backup-meta 0
 |-|-|
 |`--subdir=value`|mount a sub-directory as root (default: "")|
 |`--backup-meta=3600`|interval (in seconds) to automatically backup metadata in the object storage (0 means disable backup) (default: "3600")|
+|`--backup-skip-trash` <VersionAdd>1.2</VersionAdd>|skip files and directories in trash when backup metadata.|
 |`--heartbeat=12`|interval (in seconds) to send heartbeat; it's recommended that all clients use the same heartbeat value (default: "12")|
 |`--read-only`|allow lookup/read operations only (default: false)|
 |`--no-bgjob`|Disable background jobs, default to false, which means clients by default carry out background jobs, including:<br/><ul><li>Clean up expired files in Trash (look for `cleanupDeletedFiles`, `cleanupTrash` in [`pkg/meta/base.go`](https://github.com/juicedata/juicefs/blob/main/pkg/meta/base.go))</li><li>Delete slices that's not referenced (look for `cleanupSlices` in [`pkg/meta/base.go`](https://github.com/juicedata/juicefs/blob/main/pkg/meta/base.go))</li><li>Clean up stale client sessions (look for `CleanStaleSessions` in [`pkg/meta/base.go`](https://github.com/juicedata/juicefs/blob/main/pkg/meta/base.go))</li></ul>Note that compaction isn't affected by this option, it happens automatically with file reads and writes, client will check if compaction is in need, and run in background (take Redis for example, look for `compactChunk` in [`pkg/meta/base.go`](https://github.com/juicedata/juicefs/blob/main/pkg/meta/redis.go)).|

docs/zh_cn/deployment/hadoop_java_sdk.md

@@ -211,6 +211,7 @@ make win
 | `juicefs.file.checksum`   | `false`      | DistCp 使用 `-update` 参数时，是否计算文件 Checksum                                                                     |
 | `juicefs.no-bgjob`        | `false`      | 是否关闭后台任务（清理、备份等）                                                                                            |
 | `juicefs.backup-meta`     | 3600         | 自动将 JuiceFS 元数据备份到对象存储间隔（单位：秒），设置为 0 关闭自动备份                                                                 |
+|`juicefs.backup-skip-trash`| `false`      | 备份元数据时忽略回收站中的文件和目录。                                                                                    |
 | `juicefs.heartbeat`       | 12           | 客户端和元数据引擎之间的心跳间隔（单位：秒），建议所有客户端都设置一样                                                                         |
 
 #### 多文件系统配置

docs/zh_cn/reference/command_reference.md

@@ -384,6 +384,8 @@ juicefs dump redis://localhost sub-meta-dump.json --subdir /dir/in/jfs
 |`FILE`|导出文件路径，如果不指定，则会导出到标准输出。如果文件名以 `.gz` 结尾，将会自动压缩。|
 |`--subdir=path`|只导出指定子目录的元数据。|
 |`--keep-secret-key` <VersionAdd>1.1</VersionAdd>|导出对象存储认证信息，默认为 `false`。由于是明文导出，使用时注意数据安全。如果导出文件不包含对象存储认证信息，后续的导入完成后，需要用 [`juicefs config`](#config) 重新配置对象存储认证信息。|
+|`--fast` <VersionAdd>1.2</VersionAdd>|使用更多内存来加速导出。|
+|`--skip-trash` <VersionAdd>1.2</VersionAdd>|跳过回收站中的文件和目录。|
 
 ### `juicefs load` {#load}
 
@@ -628,6 +630,7 @@ juicefs mount redis://localhost /mnt/jfs --backup-meta 0
 |-|-|
 |`--subdir=value`|挂载指定的子目录，默认挂载整个文件系统。|
 |`--backup-meta=3600`|自动备份元数据到对象存储的间隔时间；单位秒，默认 3600，设为 0 表示不备份。|
+|`--backup-skip-trash` <VersionAdd>1.2</VersionAdd>|备份元数据时跳过回收站中的文件和目录。|
 |`--heartbeat=12`|发送心跳的间隔（单位秒），建议所有客户端使用相同的心跳值 (默认：12)|
 |`--read-only`|启用只读模式挂载。|
 |`--no-bgjob`|禁用后台任务，默认为 false，也就是说客户端会默认运行后台任务。后台任务包含：<br/><ul><li>清理回收站中过期的文件（在 [`pkg/meta/base.go`](https://github.com/juicedata/juicefs/blob/main/pkg/meta/base.go) 中搜索 `cleanupDeletedFiles` 和 `cleanupTrash`）</li><li>清理引用计数为 0 的 Slice（在 [`pkg/meta/base.go`](https://github.com/juicedata/juicefs/blob/main/pkg/meta/base.go) 中搜索 `cleanupSlices`）</li><li>清理过期的客户端会话（在 [`pkg/meta/base.go`](https://github.com/juicedata/juicefs/blob/main/pkg/meta/base.go) 中搜索 `CleanStaleSessions`）</li></ul>特别地，与[企业版](https://juicefs.com/docs/zh/cloud/guide/background-job)不同，社区版碎片合并（Compaction）不受该选项的影响，而是随着文件读写操作，自动判断是否需要合并，然后异步执行（以 Redis 为例，在 [`pkg/meta/base.go`](https://github.com/juicedata/juicefs/blob/main/pkg/meta/redis.go) 中搜索 `compactChunk`）|

pkg/meta/interface.go

@@ -468,7 +468,7 @@ type Meta interface {
 	HandleQuota(ctx Context, cmd uint8, dpath string, quotas map[string]*Quota, strict, repair bool) error
 
 	// Dump the tree under root, which may be modified by checkRoot
-	DumpMeta(w io.Writer, root Ino, keepSecret, fast bool) error
+	DumpMeta(w io.Writer, root Ino, keepSecret, fast, skipTrash bool) error
 	LoadMeta(r io.Reader) error
 
 	// getBase return the base engine.

pkg/meta/load_dump_test.go

@@ -248,7 +248,7 @@ func testDump(t *testing.T, m Meta, root Ino, expect, result string) {
 	if _, err = m.Load(true); err != nil {
 		t.Fatalf("load setting: %s", err)
 	}
-	if err = m.DumpMeta(fp, root, false, true); err != nil {
+	if err = m.DumpMeta(fp, root, false, true, false); err != nil {
 		t.Fatalf("dump meta: %s", err)
 	}
 	cmd := exec.Command("diff", expect, result)

pkg/meta/redis.go

@@ -3890,7 +3890,7 @@ func (m *redisMeta) dumpDir(inode Ino, tree *DumpedEntry, bw *bufio.Writer, dept
 	return nil
 }
 
-func (m *redisMeta) DumpMeta(w io.Writer, root Ino, keepSecret, fast bool) (err error) {
+func (m *redisMeta) DumpMeta(w io.Writer, root Ino, keepSecret, fast, skipTrash bool) (err error) {
 	defer func() {
 		if p := recover(); p != nil {
 			if e, ok := p.(error); ok {
@@ -4011,7 +4011,7 @@ func (m *redisMeta) DumpMeta(w io.Writer, root Ino, keepSecret, fast bool) (err
 	if err = m.dumpDir(root, tree, bw, 1, bar); err != nil {
 		return err
 	}
-	if root == RootInode {
+	if root == RootInode && !skipTrash {
 		trash := &DumpedEntry{
 			Name: "Trash",
 			Attr: &DumpedAttr{

pkg/meta/sql.go

@@ -3577,7 +3577,7 @@ func (m *dbMeta) makeSnap(ses *xorm.Session, bar *utils.Bar) error {
 	return nil
 }
 
-func (m *dbMeta) DumpMeta(w io.Writer, root Ino, keepSecret, fast bool) (err error) {
+func (m *dbMeta) DumpMeta(w io.Writer, root Ino, keepSecret, fast, skipTrash bool) (err error) {
 	defer func() {
 		if p := recover(); p != nil {
 			if e, ok := p.(error); ok {
@@ -3605,7 +3605,7 @@ func (m *dbMeta) DumpMeta(w io.Writer, root Ino, keepSecret, fast bool) (err err
 			if tree, err = m.dumpEntry(s, root, TypeDirectory); err != nil {
 				return err
 			}
-			if root == 1 {
+			if root == 1 && !skipTrash {
 				if trash, err = m.dumpEntry(s, TrashInode, TypeDirectory); err != nil {
 					return err
 				}

pkg/meta/tkv.go

@@ -2999,7 +2999,7 @@ func (m *kvMeta) dumpDir(inode Ino, tree *DumpedEntry, bw *bufio.Writer, depth i
 	return nil
 }
 
-func (m *kvMeta) DumpMeta(w io.Writer, root Ino, keepSecret, fast bool) (err error) {
+func (m *kvMeta) DumpMeta(w io.Writer, root Ino, keepSecret, fast, skipTrash bool) (err error) {
 	defer func() {
 		if p := recover(); p != nil {
 			debug.PrintStack()
@@ -3115,7 +3115,7 @@ func (m *kvMeta) DumpMeta(w io.Writer, root Ino, keepSecret, fast bool) (err err
 		if err = m.dumpEntry(root, tree); err != nil {
 			return err
 		}
-		if root == 1 {
+		if root == 1 && !skipTrash {
 			trash = &DumpedEntry{
 				Attr: &DumpedAttr{
 					Inode: TrashInode,

pkg/vfs/backup.go

@@ -30,7 +30,7 @@ import (
 )
 
 // Backup metadata periodically in the object storage
-func Backup(m meta.Meta, blob object.ObjectStorage, interval time.Duration) {
+func Backup(m meta.Meta, blob object.ObjectStorage, interval time.Duration, skipTrash bool) {
 	ctx := meta.Background
 	key := "lastBackup"
 	for {
@@ -65,7 +65,7 @@ func Backup(m meta.Meta, blob object.ObjectStorage, interval time.Duration) {
 			}
 			go cleanupBackups(blob, now)
 			logger.Debugf("backup metadata started")
-			if err = backup(m, blob, now); err == nil {
+			if err = backup(m, blob, now, skipTrash); err == nil {
 				logger.Infof("backup metadata succeed, used %s", time.Since(now))
 			} else {
 				logger.Warnf("backup metadata failed: %s", err)
@@ -74,7 +74,7 @@ func Backup(m meta.Meta, blob object.ObjectStorage, interval time.Duration) {
 	}
 }
 
-func backup(m meta.Meta, blob object.ObjectStorage, now time.Time) error {
+func backup(m meta.Meta, blob object.ObjectStorage, now time.Time, skipTrash bool) error {
 	name := "dump-" + now.UTC().Format("2006-01-02-150405") + ".json.gz"
 	fp, err := os.CreateTemp("", "juicefs-meta-*")
 	if err != nil {
@@ -83,7 +83,7 @@ func backup(m meta.Meta, blob object.ObjectStorage, now time.Time) error {
 	defer os.Remove(fp.Name())
 	defer fp.Close()
 	zw := gzip.NewWriter(fp)
-	err = m.DumpMeta(zw, 0, false, false) // force dump the whole tree
+	err = m.DumpMeta(zw, 0, false, false, skipTrash) // force dump the whole tree
 	_ = zw.Close()
 	if err != nil {
 		return err

pkg/vfs/backup_test.go

@@ -69,7 +69,7 @@ func TestRotate(t *testing.T) {
 
 func TestBackup(t *testing.T) {
 	v, blob := createTestVFS()
-	go Backup(v.Meta, blob, time.Millisecond*100)
+	go Backup(v.Meta, blob, time.Millisecond*100, false)
 	time.Sleep(time.Millisecond * 100)
 
 	blob = object.WithPrefix(blob, "meta/")

pkg/vfs/vfs.go

@@ -117,6 +117,7 @@ type Config struct {
 	DirEntryTimeout      time.Duration
 	EntryTimeout         time.Duration
 	BackupMeta           time.Duration
+	BackupSkipTrash      bool
 	FastResolve          bool   `json:",omitempty"`
 	AccessLog            string `json:",omitempty"`
 	PrefixInternal       bool

sdk/java/libjfs/main.go

@@ -279,6 +279,7 @@ type javaConf struct {
 	NoBGJob           bool    `json:"noBGJob"`
 	OpenCache         float64 `json:"openCache"`
 	BackupMeta        int64   `json:"backupMeta"`
+	BackupSkipTrash   bool    `json:"backupSkipTrash"`
 	Heartbeat         int     `json:"heartbeat"`
 	CacheDir          string  `json:"cacheDir"`
 	CacheSize         int64   `json:"cacheSize"`
@@ -576,9 +577,10 @@ func jfs_init(cname, jsonConf, user, group, superuser, supergroup *C.char) int64
 			AccessLog:       jConf.AccessLog,
 			FastResolve:     jConf.FastResolve,
 			BackupMeta:      time.Second * time.Duration(jConf.BackupMeta),
+			BackupSkipTrash: jConf.BackupSkipTrash,
 		}
 		if !jConf.ReadOnly && !jConf.NoSession && !jConf.NoBGJob && conf.BackupMeta > 0 {
-			go vfs.Backup(m, blob, conf.BackupMeta)
+			go vfs.Backup(m, blob, conf.BackupMeta, conf.BackupSkipTrash)
 		}
 		if !jConf.NoUsageReport && !jConf.NoSession {
 			go usage.ReportUsage(m, "java-sdk "+version.Version())

sdk/java/src/main/java/io/juicefs/JuiceFileSystemImpl.java

@@ -372,6 +372,7 @@ public void initialize(URI uri, Configuration conf) throws IOException {
     obj.put("cacheSize", Integer.valueOf(getConf(conf, "cache-size", "100")));
     obj.put("openCache", Float.valueOf(getConf(conf, "open-cache", "0.0")));
     obj.put("backupMeta", Integer.valueOf(getConf(conf, "backup-meta", "3600")));
+    obj.put("backupSkipTrash", Boolean.valueOf(getConf(conf, "backup-skip-trash", "false")));
     obj.put("heartbeat", Integer.valueOf(getConf(conf, "heartbeat", "12")));
     obj.put("attrTimeout", Float.valueOf(getConf(conf, "attr-cache", "0.0")));
     obj.put("entryTimeout", Float.valueOf(getConf(conf, "entry-cache", "0.0")));