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- // Copyright 2013 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #ifndef NET_DISK_CACHE_SIMPLE_SIMPLE_BACKEND_VERSION_H_
- #define NET_DISK_CACHE_SIMPLE_SIMPLE_BACKEND_VERSION_H_
- #include <stdint.h>
- namespace disk_cache {
- // Short rules helping to think about data upgrades within Simple Cache:
- // * ALL changes of on-disk data format, backward-compatible or not,
- // forward-compatible or not, require updating the |kSimpleVersion|.
- // * All cache Upgrades are performed on backend start, must be finished
- // before the new backend starts processing any incoming operations.
- // * If the Upgrade is not implemented for transition from
- // |kSimpleVersion - 1| then the whole cache directory will be cleared.
- // * Dropping cache data on disk or some of its parts can be a valid way to
- // Upgrade.
- const uint32_t kLastCompatSparseVersion = 7;
- const uint32_t kSimpleVersion = 9;
- // The version of the entry file(s) as written to disk. Must be updated iff the
- // entry format changes with the overall backend version update.
- const uint32_t kSimpleEntryVersionOnDisk = 5;
- } // namespace disk_cache
- #endif // NET_DISK_CACHE_SIMPLE_SIMPLE_BACKEND_VERSION_H_
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