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Efficient XML Interchange Capability for NETCONF draft-varga-netconf-exi-capability-00

Efficient XML Interchange Capability for NETCONF draft-varga-netconf-exi-capability-00. Robert Varga Pantheon Technologies. NETCONF WG, IETF 87 Berlin. Introduction. NETCONF is a candidate protocol for I2RS High transaction rate is expected Concerns over XML encoding efficiency Goals:

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Efficient XML Interchange Capability for NETCONF draft-varga-netconf-exi-capability-00

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  1. Efficient XML Interchange Capability for NETCONFdraft-varga-netconf-exi-capability-00 Robert Varga Pantheon Technologies NETCONF WG, IETF 87 Berlin

  2. Introduction • NETCONF is a candidate protocol for I2RS • High transaction rate is expected • Concerns over XML encoding efficiency • Goals: • Define a binary message encoding based on EXI • Completely optional, backwards compatible • No impact on other protocol aspects

  3. What is Efficient XML Interchange? • Binary encoding of XML Information Set • W3C Recommendation • Two basic modes of operation • Schema-less • Schema-informed • Tunable information packing • Tunable loss of non-essential information

  4. Performance prototype • Existing commercial NETCONF implementation • Hard-wired to support EXI using exip • Schema-informed tests using cut-down netconf.xsd from RFC6421 • Transport modified to UNIX-domain sockets • Measure on-wire message sizes • Measure operation latency • Request encode/decode • Operation execution • Response encode/decode

  5. Message sizes

  6. No-data operation latency

  7. Data operation latency

  8. Improvements Message size Latency

  9. Current state • Basic capability advertising support • Two new operations to enable/disable EXI encoding • Supports schema-less and fixed-schema operation • No existing implementation (yet)

  10. Next steps • Improve document with implementation guidelines • Develop an implementation • Patch to libnetconf • OpenDaylight NETCONF plugin (?) • Optional dynamic schema capability • Client/server schema interchange • May be unavailable in constrained environments

  11. Q&A

  12. Thank you

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