Difference between revisions of "Atlas"
| Ligne 66: | Ligne 66: | ||
* [[ Atlas:Logbook| Logbook ]] | * [[ Atlas:Logbook| Logbook ]] | ||
| + | |||
| + | * Current conclusion | ||
| + | ** Enabling direct access creates much more network usage -> Is it usefull for ATLAS ? (processing urgent request faster ?) | ||
| + | ** Job brokering prefers direct access than Rucio/FTS transfer | ||
| + | ** 10 Gb/s connection LAPP-CC (used for all LAPP WAN transfers to any site) can get saturated if huge amount of jobs starting at same time (No smoothing by Panda) | ||
| + | |||
| + | * Next steps | ||
| + | ** Monitor job efficiency vs RTT between SE and WN -> Identify when cache does not have impact (assuming no network bandwidth limitation) | ||
| + | ** Understand the ATLAS job borkering algorithm | ||
Version du 16:14, 15 septembre 2018
Bienvenue sur la page Atlas LCG-France
Welcome to the LCG-France Atlas page
DOMA_FR tests
- Global transfers from/ to (same site dest/source site excluded)
| Header text | LAPP | LPSC | CC |
|---|---|---|---|
| From | |||
| To |
- Data access monitorings per WN
| Destination of access | LAPP | LPSC | CC |
|---|---|---|---|
| Production download | |||
| Production input | |||
| Analysis Download | |||
| Analysis Direct Access |
- Current conclusion
- Enabling direct access creates much more network usage -> Is it usefull for ATLAS ? (processing urgent request faster ?)
- Job brokering prefers direct access than Rucio/FTS transfer
- 10 Gb/s connection LAPP-CC (used for all LAPP WAN transfers to any site) can get saturated if huge amount of jobs starting at same time (No smoothing by Panda)
- Next steps
- Monitor job efficiency vs RTT between SE and WN -> Identify when cache does not have impact (assuming no network bandwidth limitation)
- Understand the ATLAS job borkering algorithm
