Optimal dCache TAPE REST configuration
- related discussion in GGUS:160869#update#31
- default dCache 8.2.19 TAPE REST request configuration is not compatible with default FTS numbers
- FTS default parameters
- StagingBulkSize=200
- StagingConcurrentRequests=5000
- dCache default parameters
- Maximum concurrent (active) requests : 110
- Maximum requests per user : 10
- Maximum expansion depth : TARGET
- Maximum flat targets : 100000
- Maximum shallow targets : 100
- Maximum recursive targets : 1
- mismatched configuration can lead to dCache TAPE REST response
- { "detail": "Too Many Requests", "title": "Too Many Requests", "status": "429" }
- wlcg-doma-tpc email thread "FTS values for Staging Request size and Concurrent Staging Requests"
- make reasonable defaults in future dCache releases that will be compatible with FTS default expectations
storage.stage