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Age	Commit message (Collapse)	Author
2025-11-03	[CAS] Add UnifiedOnDiskCache and OnDiskCAS (#114103)	Steven Wu
	Add a new abstraction layer UnifiedOnDiskCache that adds new functions of disk space management and data validation that builds on top of OnDiskGraphDB and OnDiskKeyValueDB. Build upon UnifiedOnDiskCache, it is OnDiskCAS that implements ObjectStore and ActionCache interface for LLVM tools to interact with CAS storage.
2025-10-20	[CAS] Add OnDiskGraphDB and OnDiskKeyValueDB (#114102)	Steven Wu
	Add OnDiskGraphDB and OnDiskKeyValueDB that can be used to implement ObjectStore and ActionCache respectively. Those are on-disk persistent storage that build upon OnDiskTrieHashMap and implements key functions that are required by LLVMCAS interfaces. This abstraction layer defines how the objects are hashed and stored on disk. OnDiskKeyValueDB is a basic OnDiskTrieHashMap while OnDiskGraphDB also defines: * How objects of various size are store on disk and are referenced by the trie nodes. * How to store the references from one stored object to another object that is referenced. In addition to basic APIs for ObjectStore and ActionCache, other advances database configuration features can be implemented in this layer without exposing to the users of the LLVMCAS interface. For example, OnDiskGraphDB has a faulty in function to fetch data from an upstream OnDiskGraphDB if the data is missing.