Difference between revisions of "XRootD Buffer"
Jump to navigation
Jump to search
| Line 1: | Line 1: | ||
=UNDER CONSTRUCTION= | =UNDER CONSTRUCTION= | ||
=General Design= | =General Design= | ||
| − | * {{DuneDocDB|1628|DUNE DocDB 1628}} | + | * A few bits of info: |
| + | ** 230MB per readout (all 6 APAs, 5ms window) | ||
| + | ** File size will determine the number of parallel writes and vice versa | ||
| + | ** Nominal "max top instantaneous rate" is 3GB/s | ||
| + | ** Nominal spill is 4.5s | ||
| + | ** Nominal data in spill 13.5GB | ||
| + | ** Nominal data out of spill 13.5GB | ||
| + | * A proposal for the online buffer:{{DuneDocDB|1628|DUNE DocDB 1628}} | ||
=XROOTD-FTS Interface= | =XROOTD-FTS Interface= | ||
Revision as of 01:45, 18 August 2016
Contents
UNDER CONSTRUCTION
General Design
- A few bits of info:
- 230MB per readout (all 6 APAs, 5ms window)
- File size will determine the number of parallel writes and vice versa
- Nominal "max top instantaneous rate" is 3GB/s
- Nominal spill is 4.5s
- Nominal data in spill 13.5GB
- Nominal data out of spill 13.5GB
- A proposal for the online buffer:DUNE DocDB 1628
XROOTD-FTS Interface
Design Considerations
- ofs.notify can be set to send ASCII messages to a FIFO or a user app/script
- format and content of the message can be configured by the developer
- considerations for blocking of xrootd by the reader of the FIFO
Functionality
- Receive a notification and parse it
- Run a part or all of the metadata generation, write it to a JSON file
- Send a HTTP post to the F-FTS agent
