diff --git a/pmpt/DB.py b/pmpt/DB.py
new file mode 100644
index 0000000..0dce35a
--- /dev/null
+++ b/pmpt/DB.py
@@ -0,0 +1,114 @@
+from tinydb import TinyDB, Storage, Query
+
+# from . import util
+import os
+import warnings
+from moyanlib import jsons
+import io
+from tqdm import tqdm
+import zstandard
+from typing import Dict, Any, Optional
+
+
+class FastJSONStorage(Storage):
+    def __init__(
+        self,
+        path: str,
+        create_dirs=False,
+        encoding=None,
+        access_mode="rb+",
+        write_threshold=1,
+        **kwargs
+    ):
+        super().__init__()
+        self.cctx = zstandard.ZstdCompressor()
+        self.dctx = zstandard.ZstdDecompressor()
+        self._mode = access_mode
+        self.kwargs = kwargs
+        self.write_threshold = write_threshold  # 指定写入阈值
+        self.write_counter = 0
+        if any(
+            [character in self._mode for character in ("+", "w", "a")]
+        ):  # any of the writing modes
+            self.touch(path, create_dirs=create_dirs)
+        self._handle = open(path, mode=self._mode, encoding=encoding)
+
+    def close(self) -> None:
+        self._handle.close()
+
+    def touch(self, path: str, create_dirs: bool):
+        if create_dirs:
+            base_dir = os.path.dirname(path)
+
+            if not os.path.exists(base_dir):
+                os.makedirs(base_dir)
+
+        with open(path, "a"):
+            pass
+
+    def read(self) -> Optional[Dict[str, Dict[str, Any]]]:
+        self._handle.seek(0, os.SEEK_END)
+        size = self._handle.tell()
+
+        if not size:
+            return None
+        else:
+            self._handle.seek(0)
+            data = self.dctx.decompress(self._handle.read())
+            return jsons.loads(data.decode())
+
+    def write(self, data: Dict[str, Dict[str, Any]]):
+        self.write_counter += 1
+        if self.write_counter == self.write_threshold:
+            self._handle.seek(0)
+
+            serialized = jsons.dumps(data, **self.kwargs)
+            serialized = self.cctx.compress(serialized.encode())
+
+            try:
+                self._handle.write(serialized)
+            except io.UnsupportedOperation:
+                raise IOError(
+                    'Cannot write to the database. Access mode is "{0}"'.format(
+                        self._mode
+                    )
+                )
+
+            self._handle.flush()
+            os.fsync(self._handle.fileno())
+
+            self._handle.truncate()
+            self.write_counter = 0
+
+
+class Base:
+    def __init__(self, name):
+        self.rootdb = TinyDB(
+            os.path.join(".", "DB.pcdb"), storage=FastJSONStorage, write_threshold=2
+        )
+        self.db = self.rootdb.table(name)
+
+    def insert(self, data):
+        self.db.insert(data)
+
+    def remove(self, query):
+        self.db.remove(query)
+
+
+class PackageData(Base):
+    def __init__(self):
+        super(PackageData, self).__init__("PackageData")
+        self.query = Query()
+
+    def add(self, name, version, info=None):
+        self.db.insert({"Name": name, "Version": version, "info": info})
+
+    def get(self, name):
+        return self.db.search(self.query.Name == name)[0]
+
+
+db = PackageData()
+for i in tqdm(range(1145)):
+    db.add("json" + str(i), "v1" + str(i))
+
+print(db.db.all())
diff --git a/pmpt/update.py b/pmpt/update.py
index a06b892..d3c4936 100644
--- a/pmpt/update.py
+++ b/pmpt/update.py
@@ -5,6 +5,8 @@ import dill
 import os
 from .util import dirs, console
 
+packageNum = 0
+
 
 def getSourceID(url):
     """
@@ -26,7 +28,12 @@ class Index:
 
 
 def getIndex(url):
-    req = requests.get(url["url"])  # 请求HTML
+    global packageNum
+    try:
+        req = requests.get(url["url"])  # 请求HTML
+    except Exception:
+        console.print("[red]Unable to connect to source[/red]")
+        return False
     HTMLIndex = req.text
 
     ClassIndex = Index(url)
@@ -41,10 +48,12 @@ def getIndex(url):
             ClassIndex.addPackage(package_name)  # 添加包
 
     console.print("Total number of packages:", str(ClassIndex.number))
+    packageNum += ClassIndex.number
     console.print('📚 Saving index..."')
     dill.dump(
         ClassIndex, open(f"{dirs.user_data_dir}/Index/{getSourceID(url)}.pidx", "wb")
     )
+    return True
 
 
 def getAllIndex():
@@ -63,5 +72,9 @@ def getAllIndex():
 
     for source in SourceList:  # 遍历源列表
         console.print("📚 Downloading index from", source["url"] + "...")
-        getIndex(source)
-        console.print("✅ [green]Index downloaded successfully![/green]")
+        sta = getIndex(source)
+        if sta:
+            console.print("✅ [green]Index downloaded successfully![/green]")
+        else:
+            console.print("❌ [red]Index download failed.[/red]")
+    # print(packageNum)
diff --git a/pmpt/util.py b/pmpt/util.py
index 6643d97..1ee1a48 100644
--- a/pmpt/util.py
+++ b/pmpt/util.py
@@ -24,21 +24,6 @@ def getVer(baseVar):
     return baseVar
 
 
-def GlobalDecorator(frame, event, arg):
-    if event == "call":
-        try:
-            func_name = frame.f_code.co_name
-            module_name = frame.f_globals["__name__"]
-            package_name = module_name.split(".")[0]  # 假设包名为模块名的第一部分
-            if package_name == "pmpt":
-                logger.trace(f"调用函数 {module_name}.{func_name}")
-        except:
-            pass
-    return GlobalDecorator
-
-
-sys.settrace(GlobalDecorator)
-
 logger.remove()
 logger.add(
     os.path.join(dirs.user_data_dir, "log.log"),