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titleTable 1: per-user, global and system limits (last reviewed on 14 03 202204 04 2023)


Per-user

Limit on simultaneous tasks/requests
Any request (web interface, API, and toolbox together)10
Toolbox workflows2550

Simultaneous data requests for public applications

35
Requests that access the ECMWF archive1
Requests that access the online CDS data53
Global
Requests that access CMIP615
Requests that access ESA CCI2
Requests that access GRUAN8
Requests that access Glacier data10
Requests that access Sea Level data610
Requests that access Water SIS data6
Requests that access the ECMWF archive50
Requests that access Glofas forecast5
Requests that access the online CDS data200250
System
Tasks of type 'adaptor'144374
Tasks of type 'cdscompute'384528


Moreover, CDS data requests also have limits in terms of number of fields and volume size which are different for each dataset (see the tables below). These values are dependent on each dataset's structure and where the data is stored. Again, these restrictions are introduced to help the system maintain good performance and minimise the queue time.

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