From c6caa6e4cc65f3a72b454b8440e75cbbf2b2ea9c Mon Sep 17 00:00:00 2001
From: root <root@HQ-10MSTD3EY.roblox.local>
Date: Sun, 20 Nov 2022 20:28:47 -0800
Subject: [PATCH] wip

---
 go.mod                                        |  1 +
 go.sum                                        |  7 ++
 .../shell/command_fs_meta_snapshots_create.go | 86 +++++++++++++++++++
 3 files changed, 94 insertions(+)
 create mode 100644 weed/shell/command_fs_meta_snapshots_create.go

diff --git a/go.mod b/go.mod
index 1fe1c4dcb..fe85fa815 100644
--- a/go.mod
+++ b/go.mod
@@ -148,6 +148,7 @@ require (
 	github.com/hanwen/go-fuse/v2 v2.1.1-0.20220627082937-d01fda7edf17
 	github.com/hashicorp/raft v1.3.11
 	github.com/hashicorp/raft-boltdb/v2 v2.2.2
+	github.com/otiai10/copy v1.9.0
 	github.com/rabbitmq/amqp091-go v1.5.0
 	github.com/tikv/client-go/v2 v2.0.2
 	github.com/ydb-platform/ydb-go-sdk-auth-environ v0.1.2
diff --git a/go.sum b/go.sum
index c863e62f2..902abfa61 100644
--- a/go.sum
+++ b/go.sum
@@ -1360,6 +1360,13 @@ github.com/openzipkin-contrib/zipkin-go-opentracing v0.4.5/go.mod h1:/wsWhb9smxS
 github.com/openzipkin/zipkin-go v0.1.6/go.mod h1:QgAqvLzwWbR/WpD4A3cGpPtJrZXNIiJc5AZX7/PBEpw=
 github.com/openzipkin/zipkin-go v0.2.1/go.mod h1:NaW6tEwdmWMaCDZzg8sh+IBNOxHMPnhQw8ySjnjRyN4=
 github.com/openzipkin/zipkin-go v0.2.2/go.mod h1:NaW6tEwdmWMaCDZzg8sh+IBNOxHMPnhQw8ySjnjRyN4=
+github.com/otiai10/copy v1.9.0 h1:7KFNiCgZ91Ru4qW4CWPf/7jqtxLagGRmIxWldPP9VY4=
+github.com/otiai10/copy v1.9.0/go.mod h1:hsfX19wcn0UWIHUQ3/4fHuehhk2UyArQ9dVFAn3FczI=
+github.com/otiai10/curr v0.0.0-20150429015615-9b4961190c95/go.mod h1:9qAhocn7zKJG+0mI8eUu6xqkFDYS2kb2saOteoSB3cE=
+github.com/otiai10/curr v1.0.0/go.mod h1:LskTG5wDwr8Rs+nNQ+1LlxRjAtTZZjtJW4rMXl6j4vs=
+github.com/otiai10/mint v1.3.0/go.mod h1:F5AjcsTsWUqX+Na9fpHb52P8pcRX2CI6A3ctIT91xUo=
+github.com/otiai10/mint v1.4.0 h1:umwcf7gbpEwf7WFzqmWwSv0CzbeMsae2u9ZvpP8j2q4=
+github.com/otiai10/mint v1.4.0/go.mod h1:gifjb2MYOoULtKLqUAEILUG/9KONW6f7YsJ6vQLTlFI=
 github.com/pact-foundation/pact-go v1.0.4/go.mod h1:uExwJY4kCzNPcHRj+hCR/HBbOOIwwtUjcrb0b5/5kLM=
 github.com/pascaldekloe/goe v0.0.0-20180627143212-57f6aae5913c/go.mod h1:lzWF7FIEvWOWxwDKqyGYQf6ZUaNfKdP144TG7ZOy1lc=
 github.com/pascaldekloe/goe v0.1.0 h1:cBOtyMzM9HTpWjXfbbunk26uA6nG3a8n06Wieeh0MwY=
diff --git a/weed/shell/command_fs_meta_snapshots_create.go b/weed/shell/command_fs_meta_snapshots_create.go
new file mode 100644
index 000000000..1a58dbf81
--- /dev/null
+++ b/weed/shell/command_fs_meta_snapshots_create.go
@@ -0,0 +1,86 @@
+package shell
+
+import (
+	"flag"
+	"fmt"
+	cp "github.com/otiai10/copy"
+	"github.com/seaweedfs/seaweedfs/weed/filer"
+	"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
+	"github.com/seaweedfs/seaweedfs/weed/util"
+	"github.com/syndtr/goleveldb/leveldb"
+	"io"
+)
+
+func init() {
+	Commands = append(Commands, &commandFsMetaSnapshotsCreate{})
+}
+
+type commandFsMetaSnapshotsCreate struct {
+}
+
+func (c *commandFsMetaSnapshotsCreate) Name() string {
+	return "fs.meta.snapshots.create"
+}
+
+func (c *commandFsMetaSnapshotsCreate) Help() string {
+	return `create snapshots of meta data from given time range.
+
+	fs.meta.snapshots.create -s yyyy-mm-dd -e yyyy-mm-dd -o
+
+	//These snapshot maybe later used to backup the system to certain timestamp.
+
+`
+}
+
+func (c *commandFsMetaSnapshotsCreate) Do(args []string, commandEnv *CommandEnv, writer io.Writer) (err error) {
+	db, err := leveldb.OpenFile("/root/go/repos/seaweedfs/weed/snapshots.db", nil)
+	if err != nil {
+		return err
+	}
+	defer db.Close()
+	fsMetaSnapshotsCreateCommand := flag.NewFlagSet(c.Name(), flag.ContinueOnError)
+	if err = fsMetaSnapshotsCreateCommand.Parse(args); err != nil {
+		return err
+	}
+
+	path := filer.SystemLogDir
+	count := 0
+	err = filer_pb.TraverseBfs(commandEnv, util.FullPath(path), func(parentPath util.FullPath, entry *filer_pb.Entry) {
+		if !entry.IsDirectory {
+			fmt.Println("%+v", entry)
+			err = db.Put([]byte(entry.GetName()), entry.Content, nil)
+			count++
+			if count%2 == 0 {
+				snapshotName := fmt.Sprintf("/root/go/repos/seaweedfs/weed/snapshots-%d.db", count/2)
+				e := cp.Copy("/root/go/repos/seaweedfs/weed/snapshots.db", snapshotName)
+				println(snapshotName)
+				if e != nil {
+					println("failed to generate " + snapshotName + e.Error())
+				}
+			}
+		}
+	})
+	verifying, err := leveldb.OpenFile("/root/go/repos/seaweedfs/weed/snapshots-1.db", nil)
+	if err != nil {
+		return err
+	}
+	iter := verifying.NewIterator(nil, nil)
+	for iter.Next() {
+		key := iter.Key()
+		fmt.Println("1 ---->")
+		fmt.Println(string(key))
+	}
+	verifying.Close()
+	verifying, err = leveldb.OpenFile("/root/go/repos/seaweedfs/weed/snapshots-4.db", nil)
+	if err != nil {
+		return err
+	}
+	iter = verifying.NewIterator(nil, nil)
+	for iter.Next() {
+		key := iter.Key()
+		fmt.Println("4 ---->")
+		fmt.Println(string(key))
+	}
+	verifying.Close()
+	return err
+}