CERN Data Management - LFC Requirements

• information source: fabrizio.furano@cernNOSPAMPLEASE.ch
• external resource: EMI Data Message Passing

Description

Catalogue consistency EMI project and the LFC/DPM.

One-way reliable data transfer between N producers and M consumers.

Client types

Producers

1 producer per Storage Element or Catalogue. Mostly WAN distributed.

Consumers

Destination types

For a give destination type:

• instances number: 100-200 hundreds
• messages content: file metadata
• messages size: few KB up to roughly 1MB
• format of the messages body: JMS MapMessages, eventually translated
• messages lifetime: days
• maximum latency: < 2 seconds
• permanent vs occasional connections: permanent connections
• security requirements: SSL connections

For a given destination instance:

• order of 100 producers
• 1 consumer per virtual destination
• tens of messages per second up to 1K/s

For a given destination type:

• order of 100 producers
• order of 100 consumers
• 1000 messages per second in total, peaks up to 10K/s

Programming Languages

C++