With this change a datanode can stream the requested shard to the
client. An error is returned if the shard does not exist or the the
shard is not local to that node.
1 data node can hit this endpoint to request data for a given shard if
the data no longer resides on the broker.
Adds a Balancer interface to allow RemoteMappers to send data node
requests to multiple nodes. It also provides the ability to failed
requests to mark the data node as offline using exponential
backoff with a 5 min max wait time.
Fixes#2242
This removes all join URLs from the config. To join a node to a
cluster, the URL of another member of the cluster should be passed
on the command line w/ the -join flag. The join URLs can now be
any node regardless of whether the node is a broker only or data
only node. At join time, the receiving node will redirect the
request to a valid broker or data node if it cannot handle the request
itself.
This can happen, though is very unlikely. If this node receives encoded
data, to be written to disk, and is queried for that data before its
metastore is updated, there will be no field mapping for the data during
decode. All this can happen because data is encoded by the node that first
received the write request, not the node that actually writes the data to
disk. So if this happens, skip the data.
This will make it easier to use these common diagnostics function in
other components, like the Broker, as well as minimizing growth of the
server type, in terms of SLOC.
This new diags code can be converted to InfluxQL rows, for easy display
and re-writes back to the database for self-monitoring.
* Update SelectStatement to have GroupByInterval
* Update parser to verify that CQs have GroupByInterval if Aggregated
* Implement CreateContinousQuery on Server
* Add ContinuousQueries to database
Mark Rushakoff
Ben Johnson
Jason Wilder
Todd Persen
Todd Persen
ben hockey
Philip O'Toole
Paul Dix
David Norton
Philip O'Toole
Cory LaNou