Scientific Linux 6

gLExec

gLExec

gLExec is a program that acts as a light-weight 'gatekeeper'. it takes Grid credentials as input, and takes the local site policy into account to authenticate and authorize the credentials. It will then switch to a new execution sandbox and execute the given command as the switched identity. gLExec is also capable of functioning as a light-weight control point which offers a binary yes/no result in logging-only mode.

StoRM

Storage Resource Manager (StoRM)

StoRM is a

  •     light
  •     scalable
  •     flexible
  •     high-performance
  •     file system independent
storage manager service (SRM) for generic disk based storage system, compliant with the standard SRM interface version 2.2. StoRM provides data management capabilities in a Grid environment to share, access and transfer data among heterogeneous and geographically distributed data centres.In particular, StoRM works on each

LFC

LCG File Catalog (LFC)

The LCG File catalogue (LFC) offers a hierarchical view of files to users, with a UNIX-like client interface. The LFC catalogue provides:

  • Logical File Name (LFN) to Storage URL (SURL) mappings (via a GUID);
  • Authorisation on its logical

DPM

Disk Pool Manager (DPM)

The Disk Pool Manager (DPM) is a lightweight storage solution for grid sites. It offers a simple way to create a disk-based grid storage element and supports both standard (HTTP/S, NFS 4.1/pNFS) and grid specific protocols (SRM, gridFTP, XROOTD, RFIO) for file management and access.

Grid Information System

Grid Information System

The Grid Information System provides detailed information about grid services. The Grid Information System system has a hierarchical structure of three levels. The fundamental building block used in this hierarchy is the Berkley Database Information Index (BDII). Although the BDII has additional complexity, it can be visualized as an LDAP

AMGA

ARDA Metadata Grid Application (AMGA)

                  • One of the most popular and widely used metadata catalog service in the Grid Community
                  • Provide and support a mechanism for locating scientific data files using descriptive information through Grid authentication
                  • Ensure competitive performance and scalability, along with a multi-threaded multi-process based on DB connection pooling, a hierarchical collection structure, replication and a federation mec

ARC

Advanced Resource Connector (ARC)

The Advanced Resource Connector (ARC) middleware integrates computing resources (usually, computing clusters managed by a batch system or standalone workstations) and storage facilities, making them available via a secure common Grid layer. In the past this middleware was called NorduGrid middleware, since it is being developed by the NorduGrid Collaboration. This software solution uses Grid technologies to enable sharing and federation of computing and storage resources distributed across different administrative and applica

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