cache: move 3.x data objects into files/md5/ prefix

dvc/cachemgr.py

@@ -1,10 +1,21 @@
 import os
+from typing import Optional, Tuple
 
 from dvc.fs import GitFileSystem, Schemes
 from dvc_data.hashfile.db import get_odb
+from dvc_data.hashfile.hash import DEFAULT_ALGORITHM
+
+LEGACY_HASH_NAMES = {"md5-dos2unix", "params"}
 
 
-def _get_odb(repo, settings, fs=None):
+def _get_odb(
+    repo,
+    settings,
+    fs=None,
+    prefix: Optional[Tuple[str, ...]] = None,
+    hash_name: Optional[str] = None,
+    **kwargs,
+):
     from dvc.fs import get_cloud_fs
 
     if not settings:
@@ -12,6 +23,10 @@ def _get_odb(repo, settings, fs=None):
 
     cls, config, fs_path = get_cloud_fs(repo, **settings)
     fs = fs or cls(**config)
+    if prefix:
+        fs_path = fs.path.join(fs_path, *prefix)
+    if hash_name:
+        config["hash_name"] = hash_name
     return get_odb(fs, fs_path, state=repo.state, **config)
 
 
@@ -24,6 +39,7 @@ class CacheManager:
         Schemes.HDFS,
         Schemes.WEBHDFS,
     ]
+    FILES_DIR = "files"
 
     def __init__(self, repo):
         self._repo = repo
@@ -53,15 +69,26 @@ class CacheManager:
         if not isinstance(repo.fs, GitFileSystem):
             kwargs["fs"] = repo.fs
 
-        odb = _get_odb(repo, settings, **kwargs)
+        odb = _get_odb(
+            repo,
+            settings,
+            prefix=(self.FILES_DIR, DEFAULT_ALGORITHM),
+            **kwargs,
+        )
         self._odb["repo"] = odb
         self._odb[Schemes.LOCAL] = odb
+        legacy_odb = _get_odb(repo, settings, hash_name="md5-dos2unix", **kwargs)
+        self._odb["legacy"] = legacy_odb
 
     def _init_odb(self, schemes):
         for scheme in schemes:
             remote = self.config.get(scheme)
             settings = {"name": remote} if remote else None
-            self._odb[scheme] = _get_odb(self._repo, settings)
+            self._odb[scheme] = _get_odb(
+                self._repo,
+                settings,
+                prefix=(self.FILES_DIR, DEFAULT_ALGORITHM),
+            )
 
     def __getattr__(self, name):
         if name not in self._odb and name in self.CLOUD_SCHEMES:
@@ -75,3 +102,11 @@ class CacheManager:
     def by_scheme(self):
         self._init_odb(self.CLOUD_SCHEMES)
         yield from self._odb.items()
+
+    @property
+    def local_cache_dir(self) -> str:
+        """Return base local cache directory without any prefixes.
+
+        (i.e. `dvc cache dir`).
+        """
+        return self.legacy.path

dvc/data_cloud.py

@@ -29,13 +29,25 @@ class Remote:
 
     @cached_property
     def odb(self) -> "HashFileDB":
+        from dvc.cachemgr import CacheManager
         from dvc_data.hashfile.db import get_odb
+        from dvc_data.hashfile.hash import DEFAULT_ALGORITHM
 
         path = self.path
         if self.worktree:
-            path = self.fs.path.join(path, ".dvc", "cache")
+            path = self.fs.path.join(
+                path, ".dvc", CacheManager.FILES_DIR, DEFAULT_ALGORITHM
+            )
+        else:
+            path = self.fs.path.join(path, CacheManager.FILES_DIR, DEFAULT_ALGORITHM)
+        return get_odb(self.fs, path, hash_name=DEFAULT_ALGORITHM, **self.config)
 
-        return get_odb(self.fs, path, hash_name="md5", **self.config)
+    @cached_property
+    def legacy_odb(self) -> "HashFileDB":
+        from dvc_data.hashfile.db import get_odb
+
+        path = self.path
+        return get_odb(self.fs, path, hash_name="md5-dos2unix", **self.config)
 
 
 class DataCloud:
@@ -101,12 +113,17 @@ class DataCloud:
         self,
         name: Optional[str] = None,
         command: str = "<command>",
+        hash_name: str = "md5",
     ) -> "HashFileDB":
+        from dvc.cachemgr import LEGACY_HASH_NAMES
+
         remote = self.get_remote(name=name, command=command)
         if remote.fs.version_aware or remote.worktree:
             raise NoRemoteError(
                 f"'{command}' is unsupported for cloud versioned remotes"
             )
+        if hash_name in LEGACY_HASH_NAMES:
+            return remote.legacy_odb
         return remote.odb
 
     def _log_missing(self, status: "CompareStatusResult"):

dvc/dependency/repo.py

@@ -80,7 +80,7 @@ class RepoDependency(Dependency):
         from dvc.fs import DVCFileSystem
 
         config = {"cache": self.repo.config["cache"]}
-        config["cache"]["dir"] = self.repo.cache.local.path
+        config["cache"]["dir"] = self.repo.cache.local_cache_dir
 
         return DVCFileSystem(
             url=self.def_repo[self.PARAM_URL],

dvc/info.py

@@ -67,7 +67,7 @@ def _get_caches(cache):
     caches = (
         cache_type
         for cache_type, cache_instance in cache.by_scheme()
-        if cache_instance and cache_type != "repo"
+        if cache_instance and cache_type not in ("repo", "legacy")
     )
 
     # Caches will be always non-empty including the local cache

dvc/output.py

@@ -500,6 +500,14 @@ class Output:
             raise RemoteCacheRequiredError(self.fs.protocol, self.fs_path)
         return odb
 
+    @property
+    def local_cache(self):
+        from dvc.cachemgr import LEGACY_HASH_NAMES
+
+        if self.hash_name in LEGACY_HASH_NAMES:
+            return self.repo.cache.legacy
+        return self.repo.cache.local
+
     @property
     def cache_path(self):
         return self.cache.fs.unstrip_protocol(
@@ -514,7 +522,7 @@ class Output:
         if self.use_cache:
             odb = self.cache
         else:
-            odb = self.repo.cache.local
+            odb = self.local_cache
         _, meta, obj = build(
             odb,
             self.fs_path,
@@ -665,7 +673,7 @@ class Output:
             )
         else:
             _, self.meta, self.obj = build(
-                self.repo.cache.local,
+                self.local_cache,
                 self.fs_path,
                 self.fs,
                 self.hash_name,
@@ -1283,7 +1291,7 @@ class Output:
             )
 
         assert self.repo
-        cache = self.cache if self.use_cache else self.repo.cache.local
+        cache = self.cache if self.use_cache else self.local_cache
         assert isinstance(cache, HashFileDB)
 
         new: "HashFile"

dvc/repo/__init__.py

@@ -420,8 +420,8 @@ class Repo:
         flist = [self.config.files["local"]]
         if tmp_dir := self.tmp_dir:
             flist.append(tmp_dir)
-        if path_isin(self.cache.repo.path, self.root_dir):
+        if path_isin(self.cache.legacy.path, self.root_dir):
-            flist.append(self.cache.repo.path)
+            flist.append(self.cache.legacy.path)
 
         for file in flist:
             self.scm_context.ignore(file)

dvc/repo/experiments/executor/local.py

@@ -152,7 +152,7 @@ class TempDirExecutor(BaseLocalExecutor):
         self, repo: "Repo", rev: str, run_cache: bool = True  # noqa: ARG002
     ):
         """Initialize DVC cache."""
-        self._update_config({"cache": {"dir": repo.cache.repo.path}})
+        self._update_config({"cache": {"dir": repo.cache.local_cache_dir}})
 
     def cleanup(self, infofile: Optional[str] = None):
         super().cleanup(infofile)

dvc/repo/open_repo.py

@@ -129,7 +129,7 @@ def _get_remote_config(url):
             name = "auto-generated-upstream"
             return {
                 "core": {"remote": name},
-                "remote": {name: {"url": repo.cache.local.path}},
+                "remote": {name: {"url": repo.cache.local_cache_dir}},
             }
 
         # Use original remote to make sure that we are using correct url,

dvc/stage/cache.py

@@ -60,7 +60,7 @@ def _get_stage_hash(stage):
 class StageCache:
     def __init__(self, repo):
         self.repo = repo
-        self.cache_dir = os.path.join(self.repo.cache.local.path, "runs")
+        self.cache_dir = os.path.join(self.repo.cache.legacy.path, "runs")
 
     def _get_cache_dir(self, key):
         return os.path.join(self.cache_dir, key[:2], key)
@@ -119,12 +119,12 @@ class StageCache:
 
     @contextmanager
     def _cache_type_copy(self):
-        cache_types = self.repo.cache.local.cache_types
+        cache_types = self.repo.cache.legacy.cache_types
-        self.repo.cache.local.cache_types = ["copy"]
+        self.repo.cache.legacy.cache_types = ["copy"]
         try:
             yield
         finally:
-            self.repo.cache.local.cache_types = cache_types
+            self.repo.cache.legacy.cache_types = cache_types
 
     def _uncached_outs(self, stage, cache):
         # NOTE: using temporary stage to avoid accidentally modifying original
@@ -166,14 +166,14 @@ class StageCache:
         COMPILED_LOCK_FILE_STAGE_SCHEMA(cache)
 
         path = self._get_cache_path(cache_key, cache_value)
-        local_fs = self.repo.cache.local.fs
+        local_fs = self.repo.cache.legacy.fs
         parent = local_fs.path.parent(path)
-        self.repo.cache.local.makedirs(parent)
+        self.repo.cache.legacy.makedirs(parent)
         tmp = local_fs.path.join(parent, fs.utils.tmp_fname())
         assert os.path.exists(parent)
         assert os.path.isdir(parent)
         dump_yaml(tmp, cache)
-        self.repo.cache.local.move(tmp, path)
+        self.repo.cache.legacy.move(tmp, path)
 
     def restore(self, stage, run_cache=True, pull=False, dry=False):
         from .serialize import to_single_stage_lockfile
@@ -258,12 +258,16 @@ class StageCache:
         return ret
 
     def push(self, remote: Optional[str], odb: Optional["ObjectDB"] = None):
-        dest_odb = odb or self.repo.cloud.get_remote_odb(remote, "push --run-cache")
+        dest_odb = odb or self.repo.cloud.get_remote_odb(
-        return self.transfer(self.repo.cache.local, dest_odb)
+            remote, "push --run-cache", hash_name="md5-dos2unix"
+        )
+        return self.transfer(self.repo.cache.legacy, dest_odb)
 
     def pull(self, remote: Optional[str], odb: Optional["ObjectDB"] = None):
-        odb = odb or self.repo.cloud.get_remote_odb(remote, "fetch --run-cache")
+        odb = odb or self.repo.cloud.get_remote_odb(
-        return self.transfer(odb, self.repo.cache.local)
+            remote, "fetch --run-cache", hash_name="md5-dos2unix"
+        )
+        return self.transfer(odb, self.repo.cache.legacy)
 
     def get_used_objs(self, used_run_cache, *args, **kwargs):
         """Return used cache for the specified run-cached stages."""

dvc/testing/api_tests.py

@@ -11,7 +11,9 @@ class TestAPI:
     def test_get_url(self, tmp_dir, dvc, remote):
         tmp_dir.dvc_gen("foo", "foo")
 
-        expected_url = (remote / "ac/bd18db4cc2f85cedef654fccc4a4d8").url
+        expected_url = (
+            remote / "files" / "md5" / "ac/bd18db4cc2f85cedef654fccc4a4d8"
+        ).url
         assert api.get_url("foo") == expected_url
 
     def test_open(self, tmp_dir, dvc, remote):

dvc/testing/workspace_tests.py

@@ -181,7 +181,7 @@ class TestAdd:
         )
         assert (workspace / "file").read_text() == "file"
         assert (
-            workspace / "cache" / hash_value[:2] / hash_value[2:]
+            workspace / "cache" / "files" / "md5" / hash_value[:2] / hash_value[2:]
         ).read_text() == "file"
 
         assert dvc.status() == {}
@@ -191,7 +191,14 @@ class TestAdd:
         workspace.gen({"dir": {"file": "file", "subdir": {"subfile": "subfile"}}})
 
         dvc.add("remote://workspace/dir")
-        assert (workspace / "cache" / dir_hash_value[:2] / dir_hash_value[2:]).is_file()
+        assert (
+            workspace
+            / "cache"
+            / "files"
+            / "md5"
+            / dir_hash_value[:2]
+            / dir_hash_value[2:]
+        ).is_file()
 
 
 def match_files(fs, entries, expected):
@@ -301,7 +308,9 @@ class TestToRemote:
         meta = stage.outs[0].meta
         assert hash_info.name == "md5"
         assert hash_info.value == "acbd18db4cc2f85cedef654fccc4a4d8"
-        assert (remote / "ac" / "bd18db4cc2f85cedef654fccc4a4d8").read_text() == "foo"
+        assert (
+            remote / "files" / "md5" / "ac" / "bd18db4cc2f85cedef654fccc4a4d8"
+        ).read_text() == "foo"
         assert meta.size == len("foo")
 
     def test_import_url_to_remote_file(self, tmp_dir, dvc, workspace, remote):
@@ -321,7 +330,9 @@ class TestToRemote:
         hash_info = stage.outs[0].hash_info
         assert hash_info.name == "md5"
         assert hash_info.value == "acbd18db4cc2f85cedef654fccc4a4d8"
-        assert (remote / "ac" / "bd18db4cc2f85cedef654fccc4a4d8").read_text() == "foo"
+        assert (
+            remote / "files" / "md5" / "ac" / "bd18db4cc2f85cedef654fccc4a4d8"
+        ).read_text() == "foo"
         assert stage.outs[0].meta.size == len("foo")
 
     def test_import_url_to_remote_dir(self, tmp_dir, dvc, workspace, remote):
@@ -351,7 +362,9 @@ class TestToRemote:
         assert hash_info.name == "md5"
         assert hash_info.value == "55d05978954d1b2cd7b06aedda9b9e43.dir"
         file_parts = json.loads(
-            (remote / "55" / "d05978954d1b2cd7b06aedda9b9e43.dir").read_text()
+            (
+                remote / "files" / "md5" / "55" / "d05978954d1b2cd7b06aedda9b9e43.dir"
+            ).read_text()
         )
 
         assert len(file_parts) == 3
@@ -363,4 +376,6 @@ class TestToRemote:
 
         for file_part in file_parts:
             md5 = file_part["md5"]
-            assert (remote / md5[:2] / md5[2:]).read_text() == file_part["relpath"]
+            assert (
+                remote / "files" / "md5" / md5[:2] / md5[2:]
+            ).read_text() == file_part["relpath"]

tests/func/api/test_data.py

@@ -17,7 +17,7 @@ def test_get_url_external(tmp_dir, erepo_dir, cloud):
 
     # Using file url to force clone to tmp repo
     repo_url = f"file://{erepo_dir.as_posix()}"
-    expected_url = (cloud / "ac/bd18db4cc2f85cedef654fccc4a4d8").url
+    expected_url = (cloud / "files" / "md5" / "ac/bd18db4cc2f85cedef654fccc4a4d8").url
     assert api.get_url("foo", repo=repo_url) == expected_url
 
 
@@ -166,16 +166,24 @@ def test_get_url_granular(tmp_dir, dvc, cloud):
     tmp_dir.add_remote(config=cloud.config)
     tmp_dir.dvc_gen({"dir": {"foo": "foo", "bar": "bar", "nested": {"file": "file"}}})
 
-    expected_url = (cloud / "5f" / "c28ea78987408341668eba6525ebd1.dir").url
+    expected_url = (
+        cloud / "files" / "md5" / "5f" / "c28ea78987408341668eba6525ebd1.dir"
+    ).url
     assert api.get_url("dir") == expected_url
 
-    expected_url = (cloud / "ac" / "bd18db4cc2f85cedef654fccc4a4d8").url
+    expected_url = (
+        cloud / "files" / "md5" / "ac" / "bd18db4cc2f85cedef654fccc4a4d8"
+    ).url
     assert api.get_url("dir/foo") == expected_url
 
-    expected_url = (cloud / "37" / "b51d194a7513e45b56f6524f2d51f2").url
+    expected_url = (
+        cloud / "files" / "md5" / "37" / "b51d194a7513e45b56f6524f2d51f2"
+    ).url
     assert api.get_url("dir/bar") == expected_url
 
-    expected_url = (cloud / "8c" / "7dd922ad47494fc02c388e12c00eac").url
+    expected_url = (
+        cloud / "files" / "md5" / "8c" / "7dd922ad47494fc02c388e12c00eac"
+    ).url
     assert api.get_url(os.path.join("dir", "nested", "file")) == expected_url
 
 
@@ -186,10 +194,14 @@ def test_get_url_subrepos(tmp_dir, scm, local_cloud):
         subrepo.dvc_gen({"dir": {"foo": "foo"}, "bar": "bar"}, commit="add files")
         subrepo.dvc.push()
 
-    expected_url = os.fspath(local_cloud / "ac" / "bd18db4cc2f85cedef654fccc4a4d8")
+    expected_url = os.fspath(
+        local_cloud / "files" / "md5" / "ac" / "bd18db4cc2f85cedef654fccc4a4d8"
+    )
     assert api.get_url(os.path.join("subrepo", "dir", "foo")) == expected_url
 
-    expected_url = os.fspath(local_cloud / "37" / "b51d194a7513e45b56f6524f2d51f2")
+    expected_url = os.fspath(
+        local_cloud / "files" / "md5" / "37" / "b51d194a7513e45b56f6524f2d51f2"
+    )
     assert api.get_url("subrepo/bar") == expected_url
 
 

tests/func/test_add.py

@@ -729,10 +729,22 @@ def test_add_symlink_file(tmp_dir, dvc):
     assert (tmp_dir / "dir" / "bar").read_text() == "bar"
 
     assert (
-        tmp_dir / ".dvc" / "cache" / "37" / "b51d194a7513e45b56f6524f2d51f2"
+        tmp_dir
+        / ".dvc"
+        / "cache"
+        / "files"
+        / "md5"
+        / "37"
+        / "b51d194a7513e45b56f6524f2d51f2"
     ).read_text() == "bar"
     assert not (
-        tmp_dir / ".dvc" / "cache" / "37" / "b51d194a7513e45b56f6524f2d51f2"
+        tmp_dir
+        / ".dvc"
+        / "cache"
+        / "files"
+        / "md5"
+        / "37"
+        / "b51d194a7513e45b56f6524f2d51f2"
     ).is_symlink()
 
     # Test that subsequent add succeeds
@@ -790,7 +802,13 @@ def test_add_with_cache_link_error(tmp_dir, dvc, mocker, capsys):
     assert (tmp_dir / "foo").exists()
     assert (tmp_dir / "foo.dvc").exists()
     assert (
-        tmp_dir / ".dvc" / "cache" / "ac" / "bd18db4cc2f85cedef654fccc4a4d8"
+        tmp_dir
+        / ".dvc"
+        / "cache"
+        / "files"
+        / "md5"
+        / "ac"
+        / "bd18db4cc2f85cedef654fccc4a4d8"
     ).read_text() == "foo"
 
 

tests/func/test_commit.py

@@ -134,7 +134,7 @@ def test_commit_granular_output(tmp_dir, dvc):
         no_commit=True,
     )
 
-    cache = tmp_dir / ".dvc" / "cache"
+    cache = tmp_dir / ".dvc" / "cache" / "files" / "md5"
     assert not list(cache.glob("*/*"))
 
     dvc.commit("foo")
@@ -175,7 +175,7 @@ def test_commit_granular_dir(tmp_dir, dvc):
     )
     dvc.add("data", no_commit=True)
 
-    cache = tmp_dir / ".dvc" / "cache"
+    cache = tmp_dir / ".dvc" / "cache" / "files" / "md5"
 
     assert set(cache.glob("*/*")) == set()
 

tests/func/test_data_cloud.py

@@ -470,11 +470,11 @@ def test_push_pull_fetch_pipeline_stages(tmp_dir, dvc, run_copy, local_remote):
 
     dvc.pull("copy-foo-bar")
     assert (tmp_dir / "bar").exists()
-    assert len(recurse_list_dir(dvc.cache.local.path)) == 2
+    assert len(recurse_list_dir(dvc.cache.local.path)) == 1
     clean(["bar"], dvc)
 
     dvc.fetch("copy-foo-bar")
-    assert len(recurse_list_dir(dvc.cache.local.path)) == 2
+    assert len(recurse_list_dir(dvc.cache.local.path)) == 1
 
 
 def test_pull_partial(tmp_dir, dvc, local_remote):

tests/func/test_gc.py

@@ -260,15 +260,23 @@ def test_gc_external_output(tmp_dir, dvc, workspace):
     foo_hash = foo_stage.outs[0].hash_info.value
     bar_hash = bar_stage.outs[0].hash_info.value
 
-    assert (workspace / "cache" / foo_hash[:2] / foo_hash[2:]).read_text() == "foo"
+    assert (
-    assert (workspace / "cache" / bar_hash[:2] / bar_hash[2:]).read_text() == "bar"
+        workspace / "cache" / "files" / "md5" / foo_hash[:2] / foo_hash[2:]
+    ).read_text() == "foo"
+    assert (
+        workspace / "cache" / "files" / "md5" / bar_hash[:2] / bar_hash[2:]
+    ).read_text() == "bar"
 
     (tmp_dir / "foo.dvc").unlink()
 
     dvc.gc(workspace=True)
 
-    assert not (workspace / "cache" / foo_hash[:2] / foo_hash[2:]).exists()
+    assert not (
-    assert (workspace / "cache" / bar_hash[:2] / bar_hash[2:]).read_text() == "bar"
+        workspace / "cache" / "files" / "md5" / foo_hash[:2] / foo_hash[2:]
+    ).exists()
+    assert (
+        workspace / "cache" / "files" / "md5" / bar_hash[:2] / bar_hash[2:]
+    ).read_text() == "bar"
 
 
 def test_gc_all_experiments(tmp_dir, scm, dvc):
@@ -288,9 +296,11 @@ def test_gc_all_experiments(tmp_dir, scm, dvc):
 
     dvc.gc(all_experiments=True, force=True)
 
-    assert not (tmp_dir / ".dvc" / "cache" / foo_hash[:2] / foo_hash[2:]).exists()
+    assert not (
+        tmp_dir / ".dvc" / "cache" / "files" / "md5" / foo_hash[:2] / foo_hash[2:]
+    ).exists()
     assert (
-        tmp_dir / ".dvc" / "cache" / baz_hash[:2] / baz_hash[2:]
+        tmp_dir / ".dvc" / "cache" / "files" / "md5" / baz_hash[:2] / baz_hash[2:]
     ).read_text() == "baz"
 
 
@@ -306,7 +316,9 @@ def test_gc_rev_num(tmp_dir, scm, dvc):
     dvc.gc(rev="HEAD", num=num, force=True)
 
     for n, i in enumerate(reversed(range(4))):
-        cache = tmp_dir / ".dvc" / "cache" / hashes[i][:2] / hashes[i][2:]
+        cache = (
+            tmp_dir / ".dvc" / "cache" / "files" / "md5" / hashes[i][:2] / hashes[i][2:]
+        )
         if n >= num:
             assert not cache.exists()
         else:

tests/func/test_install.py

@@ -77,7 +77,9 @@ class TestInstall:
         tmp_dir.dvc_gen("file", "file_content", "commit message")
 
         file_checksum = file_md5("file", dvc.fs)
-        expected_storage_path = storage_path / file_checksum[:2] / file_checksum[2:]
+        expected_storage_path = (
+            storage_path / "files" / "md5" / file_checksum[:2] / file_checksum[2:]
+        )
 
         scm.gitpython.repo.clone(os.fspath(git_remote))
         scm.gitpython.repo.create_remote("origin", os.fspath(git_remote))

tests/func/test_odb.py

@@ -89,7 +89,7 @@ def test_remote_cache_references(tmp_dir, dvc):
 
     dvc.cache = CacheManager(dvc)
 
-    assert dvc.cache.ssh.path == "/tmp"
+    assert dvc.cache.ssh.path == "/tmp/files/md5"
 
 
 def test_shared_cache_dir(tmp_dir):
@@ -113,13 +113,13 @@ def test_shared_cache_dir(tmp_dir):
     assert not os.path.exists(os.path.join("dir1", ".dvc", "cache"))
     assert not os.path.exists(os.path.join("dir2", ".dvc", "cache"))
     assert os.path.exists(
-        os.path.join(cache_dir, "dc", "f6c2fa538b445a3a095255c3641dfc")
+        os.path.join(cache_dir, "files", "md5", "dc", "f6c2fa538b445a3a095255c3641dfc")
     )
     assert os.path.exists(
-        os.path.join(cache_dir, "b4", "333c8cfa2ebba7ef20ec6c3265902b")
+        os.path.join(cache_dir, "files", "md5", "b4", "333c8cfa2ebba7ef20ec6c3265902b")
     )
     assert os.path.exists(
-        os.path.join(cache_dir, "9e", "fab2399c7c560b34de477b9aa0a465")
+        os.path.join(cache_dir, "files", "md5", "9e", "fab2399c7c560b34de477b9aa0a465")
     )
 
 
@@ -165,7 +165,7 @@ def test_cmd_cache_relative_path(tmp_dir, scm, dvc, make_tmp_dir):
     tmp_dir.dvc_gen({"foo": "foo"})
 
     assert os.path.exists(
-        os.path.join(cache_dir, "ac", "bd18db4cc2f85cedef654fccc4a4d8")
+        os.path.join(cache_dir, "files", "md5", "ac", "bd18db4cc2f85cedef654fccc4a4d8")
     )
 
 

tests/func/test_run.py

@@ -573,7 +573,7 @@ def test_run_external_outputs(
     assert (local_workspace / "foo").read_text() == "foo"
     assert (local_workspace / "bar").read_text() == "bar"
     assert (
-        local_workspace / "cache" / bar_hash[:2] / bar_hash[2:]
+        local_workspace / "cache" / "files" / "md5" / bar_hash[:2] / bar_hash[2:]
     ).read_text() == "bar"
 
 

tests/func/test_unprotect.py

@@ -6,7 +6,9 @@ def test_unprotect(tmp_dir, dvc):
 
     dvc.cache.local.cache_types = ["hardlink"]
     dvc.add("foo")
-    cache = os.path.join(".dvc", "cache", "ac", "bd18db4cc2f85cedef654fccc4a4d8")
+    cache = os.path.join(
+        ".dvc", "cache", "files", "md5", "ac", "bd18db4cc2f85cedef654fccc4a4d8"
+    )
     assert not os.access("foo", os.W_OK)
     assert not os.access(cache, os.W_OK)
 

tests/unit/repo/test_open_repo.py

@@ -55,7 +55,7 @@ def test_subrepo_is_constructed_properly(
 
     subrepo = tmp_dir / "subrepo"
     make_subrepo(subrepo, scm)
-    local_cache = subrepo.dvc.cache.local.path
+    local_cache = subrepo.dvc.cache.local_cache_dir
 
     tmp_dir.scm_gen("bar", "bar", commit="add bar")
     subrepo.dvc_gen("foo", "foo", commit="add foo")
@@ -75,8 +75,8 @@ def test_subrepo_is_constructed_properly(
 
         assert repo.url == str(tmp_dir)
         assert repo.config["cache"]["dir"] == str(cache_dir)
-        assert repo.cache.local.path == str(cache_dir)
+        assert repo.cache.local.path == os.path.join(cache_dir, "files", "md5")
-        assert subrepo.cache.local.path == str(cache_dir)
+        assert subrepo.cache.local.path == os.path.join(cache_dir, "files", "md5")
 
         assert repo.config["cache"]["type"] == ["symlink"]
         assert repo.cache.local.cache_types == ["symlink"]
@@ -84,7 +84,5 @@ def test_subrepo_is_constructed_properly(
 
         assert subrepo.config["remote"]["auto-generated-upstream"]["url"] == local_cache
         if root_is_dvc:
-            main_cache = tmp_dir.dvc.cache.local.path
+            main_cache = tmp_dir.dvc.cache.local_cache_dir
-            assert repo.config["remote"]["auto-generated-upstream"]["url"] == str(
+            assert repo.config["remote"]["auto-generated-upstream"]["url"] == main_cache
-                main_cache
-            )

tests/unit/test_info.py

@@ -45,7 +45,7 @@ def find_supported_remotes(string):
 def test_info_in_repo(scm_init, tmp_dir):
     tmp_dir.init(scm=scm_init, dvc=True)
     # Create `.dvc/cache`, that is needed to check supported link types.
-    os.mkdir(tmp_dir.dvc.cache.local.path)
+    os.makedirs(tmp_dir.dvc.cache.local.path)
 
     dvc_info = get_dvc_info()
 
@@ -113,7 +113,7 @@ def test_remotes(tmp_dir, dvc, caplog):
 
 
 def test_fs_info_in_repo(tmp_dir, dvc, caplog):
-    os.mkdir(dvc.cache.local.path)
+    os.makedirs(dvc.cache.local.path)
     dvc_info = get_dvc_info()
 
     assert re.search(r"Cache directory: .* on .*", dvc_info)