With this change remote mapping no longer uses HTTP, as the HTTP ports
exposed by nodes on the cluster are not known cluster wide. The TCP
ports exposed by the cluster service are, so this change uses that
functionality. Each RemoteMapper has its own dedicated connection pool
for each node, and remote mapping TCP connections are in no way coupled
with query TCP connections.
With this change, the query engine code gathers information about
shards and tagsets by working with individual shards, collating the
information, and returning that to the client. It does not assume that any
particular shard is local, and accesses all shards through abstracted
Mappers, of which there are two types -- a Mapper type for Raw queries
and a second type for Aggregate queries. There are corresponding
Executors for each type of Mapper, but both types of Executors share the
same interface.
Previously there was a batcher per connection and each batcher was
flushed when the connection was closed. This didn't have much of an
effect when multiple clients connected and disconnected since it would
flush the batch immediately. It also did not help UDP traffic.
Instead, there is now a shared batcher for the service so that multiple
connections will not cause frequent flushes.
Provides a little more flexibility in controlling the parsed
metric names for metris like:
servers.localhost.cpu.cpu0.user
Previously, you could only use a single field like "cpu", "user"
or a wildcard to match "cpu.cpu0.user". You can now pull out "cpu"
and "user" and join them together in the metric name using a custom
separator character. By default this is ".".
This adds a sorted search tree for matchining filters to a template
more efficiently. Each filter is split on "." and each element is
added to the tree. Patterns with matching prefixes are added under
the same subtree.
These are tags that can be added at the template level. They
will override any global tags and any parsed tags with the same
name from the metric will override these.
Gunnar
gunnaraasen
Nathaniel Cook
Todd Persen
Nathaniel Cook
Philip O'Toole
Philip O'Toole
Alexander Morozov
Josh Horwitz
Sean Beckett
Jason Wilder
Joseph Crail