Data Management Middleware Stack
From GridPP Wiki
Looking at Data Management as a service stack it can be broken down into:
Component | LFN | SURL | Comment |
---|---|---|---|
File Catalog | Yes | Yes | Only valid data should get here. |
File Placement Service | Yes | Yes | Can manipulate catalogs, invoke FTS. |
File Transfer Service | No | Yes | Holds lower level channel information. Invokes low level copies to actually schedule data transfers. |
Low level transfer | No | Yes | Usually Grid FTP. Can fail disgracefully. |
The middleware above Data Management would be Metadata catalogs and experiment interfaces. Beneath the data management layers lie Grid Storage middleware.