GT Data Management: Replica Location Service (RLS)

The replica location service (RLS) maintains and provides access to mapping information from logical names for data items to target names. These target names may represent physical locations of data items, or an entry in the RLS may map to another level of logical naming for the data item.

The RLS is intended to be one of a set of services for providing data replication management in grids. By itself, it does not guarantee consistency among replicated data or guarantee the uniqueness of filenames registered in the directory. The RLS is intended to be used by higher-level grid services that provide these functionalities.

The Replica Location Service was co-developed by the Globus team and Work Package 2 of the DataGrid project.

View the RLS FAQ here.

RLS in GT5

RLS in GT 5.0

RLS in GT4

RLS in GT 4.*

RLS in 4.0 is a WSRF implementation.

RLS in GT3

RLS in GT 3.2

RFT implementation in 3.2 supports the deployment of a hierarchy of Replica Location Index (RLI) nodes.

In past RLS versions, RLIs summarized mapping information from one or more Local Replica Catalog (LRC) nodes. In this version, an RLS can be configured with an arbitrary hierarchy of RLI nodes, where each RLI summarizes state information for one or more lower-level LRC and/or RLI nodes.

RLS in 3.0

Note: This version is no longer supported.

RLS in GT2

Note: This version is no longer supported.

Papers

RLS Sponsors and Testbed Participants

  • Department of Energy SciDAC (Scientific Discovery Through Advanced Computing) Program
  • National Science Foundation GriPhyN (Grid Physics Network) Project