Support for partitioning metric collection load across horizontally scaled-out central agents
New method of partitioning alarm evaluation load using tooz coordination, as opposed to a hand-crafted protocol
Much improved SQLAlchemy storage performance & scalability, so that MySQL or PostgreSQL can be used as the metering store for PoCs or small deployments
Support for hardware-oriented monitoring of IPMI sensors via notifications from either Ironic or a new standalone agent
More flexible & efficient SNMP monitoring:
batching queries for multiple SNMP metrics into a single call to each daemon
dynamic discovery of nodes deployed by TripleO for SNMP polling
the ability to more easily extend the range of SNMP metrics that ceilometer gathers
the ability to derive new metrics from arithmetic transformations applied to multiple primary metrics
Option to split off the alarms persistence into a separate database
Option to use notifications instead of RPC for metering messages
Metering of Neutron networking services: LBaaS, FWaaS & VPNaaS
New XenAPI compute inspector
Support for persisting events via the MongoDB & Hbase storage drivers (previously limited to SQLAlchemy)
Support for per-device metering of instance disks
Use of ceilometer as a collector for os-profiler data
