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Published byEmma Newman Modified over 11 years ago
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RLS and DRS Roadmap Items Ann Chervenak Robert Schuler USC Information Sciences Institute
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Replication Services l Replica Location Service (RLS) u Maintains mappings between logical file names and physical locations u Associates attributes with mappings l Data Replication Service (DRS) u Combines RLS cataloguing with data replication operations performed by Reliable File Transfer Service (RFT)
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RLS Roadmap: Pluggable RLS Backend l Current RLS backend is some type of relational database u Good performance and scalability l Want to be able to support a backend mechanism for storing name mappings that is optimized to provide higher performance l Requestor: LIGO l Pluggable backend to allow use of a specialized hashing technique
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RLS Roadmap (Requested): Improved Support for Bulk Renames l SCEC project adding and updating hundreds of thousands of entries l Would like better support for bulk modification command u E.g., regular expression-based replacement of filename prefixes
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DRS Roadmap: Requirements analysis and improvements to DRS in support of LIGO l Design of DRS is based on LIGO's Lightweight Data Replicator service l Explore requirements for integrating DRS into the next generation of LIGO data architecture l Identify and implement enhancements to DRS to support the requirements of high-performance data Grids
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DRS Roadmap: Replica Validation Capability l Design and implement replica validation and consistency checking l Requested by LIGO and others l Current DRS supports on-demand replication of data files between sites u Once data has been replicated, there is no guarantee that replica consistency will be maintained l Users need the ability to validate replicated data files and identify files that do not meet a specified equivalence criterion
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