Transcript LPE.ppt

Lightweight
Preservation
Environment
Gary Jackson
<[email protected]>
Introduction
The LPE is a prototype data grid built in
conjunction with Fujitsu Labs of America
 In part, the LPE is a test bed for
exercising Globus grid technologies
 An intention of the LPE is to preserve
data. I will not be talking about the
preservation measures today.
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Globus Components

The LPE is largely built on Globus Toolkit
components
 Grid
Security Infrastructure (GSI) and GSI
interfaces
 Replica Location Service (RLS)
 Metadata Catalog Service (MCS)
 GridFTP
Implementation
The implementation is based on GT3 and
the Open Grid Services Infrastructure
(OGSI)
 This infrastructure is being replaced with
Web Services Resource Framework (WSRF)

Implementation
The LPE is implemented as a set of Grid
Services
 This means each component has it’s own
API that can be accessed through webservice remote procedure call

Implementation

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The Data Manager
(DM) is the core of
the LPE
The Preservation
Manager (PM) and
Transform Manager
(TM) handle
preservation aspects
The interface is
servlet-based to talk
natively to the DM
Lessons Learned
Globus is flexible, but also complicated
 Some Globus components are fragile
(MCS, RFT) while others are very solid
and reliable (GSI interfaces, GridFTP)
 Globus is evolving and improving: the
implementation was made much better
with subsequent toolkit releases
