Trace collection configuration in Huawei eNB

[qaqa]

Hi Huawei expert,

anyone know know the configuration of trace collection @ Huawei eNodeB. when a "cell trace " is enabled in U2000 how does the eNB collects the traces and send them back to U2000/trace server, is it by bench of messages or it is by file? is based on time, i.e. every 15min or based on file size
is it configurable at the eNB level or hard-coded?

thank you for your help