You can change the default file name pattern.

The Ericsson IMS Metrics File provides a complete listing of the expected counters for each file pattern type. This spreadsheet is available on the online support website https://my.vmware.com/.

Table 1. Node, Performance Category, Default file name pattern and 3GPP Format
Node Performance category Default file name pattern 3GPP format
CSCF Cscf A20.*_Cscf nPMF 32.401v5.0
CSCF Cscf2 A20.*_Cscf2 nPMF 32.401v5.0
CSCF CscfSipServer A20.*_CscfSipServer nPMF 32.401v5.0
CSCF CscfSipClient A20.*_CscfSipClient nPMF 32.401v5.0
TSP IPv4_MeassurementJob A20.*cscf.*_IPv4.* nPMF 32.401v5.0
TSP Diameter A20.*cscf.*_Diameter.* nPMF 32.401v5.0
TSP PlatformMeassures A20.*cscf.*_PlatformMeasures.* oPMF 32.401v5.0
TSP IPv6_MeassurementJob A.*cscf.*_IPv6.* nPMF 32.401v5.0
TSP OamProvision-Meassurement A20.*cscf.*_OamProvisioning.* nPMF 32.401v5.0