Abstract: The subject disclosure is directed to an indexing technology for massive blob/objects, in which a Multi-Level Index and a well-designed hash function work together to reduce the low-latency memory consumption and to finish the Blob lookup/insertion/deletion operations with fixed and limited IO Requests (including read/write). Every blob is uniquely identified by its fingerprint. All the fingerprints are stored in the Multi-Level Index which includes Root Index, Intermediate Indexes and Leaf Index. There may be 0 or 1 or more intermediate indexes. All of these indexes in the Multi-Level Index are built on non-volatile storage. The Insertion Buffer, Deletion Buffer are built in the primary storage or secondary storage, and they are used to resolve the write amplification for the indexes in the Multi-Level Index.