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.

Table 1. Node, Performance Category, Default file name pattern and 3GPP Format
Node Performance category Default file name pattern 3GPP format
MTAS MtasCDiv .*_MtasCDiv.* nPMF 32.401v5.0
MTAS MtasCharging .*_MtasCharging.* nPMF 32.401v5.0
MTAS MtasComBarring .*_MtasComBarring.* nPMF 32.401v5.0
MTAS MtasConf .*_MtasConf.* nPMF 32.401v5.0
MTAS MtasFcd .*_MtasFcd.* nPMF 32.401v5.0
MTAS MtasFunction .*_MtasFunction.* nPMF 32.401v5.0
MTAS MtasH248 .*_MtasH248.* nPMF 32.401v5.0
MTAS MtasHold .*_MtasHold.* nPMF 32.401v5.0
MTAS MtasIdPres .*_MtasIdPres.* nPMF 32.401v5.0
MTAS MtasMmt .*_MtasMmt.* nPMF 32.401v5.0
MTAS MtasMrfc .*_MtasMrfc.* nPMF 32.401v5.0
MTAS MtasXdms .*_MtasXdms.* nPMF 32.401v5.0
MTAS MtasQos .*_MtasQos.* nPMF 32.401v5.0
MTAS MtasScc .*_MtasScc.* nPMF 32.401v5.0
MTAS MtasShInterface .*_MtasShInterface.* nPMF 32.401v5.0
MTAS MtasSip .*_MtasSip.* nPMF 32.401v5.0
MTAS MtasSrvcc .*_MtasSrvcc.* nPMF 32.401v5.0
MTAS MtasSubsData .*_MtasSubsData.* nPMF 32.401v5.0
MTAS MtasTraf .*_MtasTraf.* nPMF 32.401v5.0
MTAS MtasLicenses .*_MtasLicenses.* nPMF 32.401v5.0
TSP IPv4_MeassurementJob A.*_IPv4.* nPMF 32.401v5.0
TSP Diameter .A.*_Diameter.* nPMF 32.401v5.0
TSP PlatformMeassures .A.*_PlatformMeasures.* oPMF 32.401v5.0
TSP IPv6_MeassurementJob A.*_IPv6.* oPMF 32.401v5.0
TSP OamProvision-Measurement A.*_OamProvisioning.* nPMF 32.401v5.0