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Chris Lu
eafe79ebff
* filer: skip UpdateEntry when inline content is unchanged SaveInsideFiler rewrites config files (IAM identities, filer.conf, remote mappings, policies) unconditionally. Each no-op UpdateEntry is a metadata event the local meta log persists to /topics/.system/log, which appends a chunk to a volume. A client that rewrites identical config on a timer, e.g. the seaweedfs-operator 5-minute resync calling UpdateUser with unchanged actions, keeps .dat/.idx files growing on an otherwise idle cluster and prevents HDD spindown (seaweedfs/seaweedfs#11571). Skip the UpdateEntry when the stored inline content is byte-identical, so unchanged writes produce no metadata event and no volume writes. * filer: test that identical SaveInsideFiler writes skip UpdateEntry * filer: require stamped Md5 before skipping identical writes An entry holding identical content but no Md5 (written before hashing, or by a tool that cleared it) would never get the stamp that IF_ETAG_MATCH conditional writes key off. Skip only when both the stored content and its Md5 match, so one write still lands to repair the stamp.