This commit fixes the b1 cursor so that reads from either the cache
or bolt buffer will check against the previously read key to ensure
that two of the same keys are not returned.
Fixes#3571.
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.
This commit adds a write ahead log to the shard. Entries are cached
in memory and periodically flushed back into the index. The WAL and
the cache are both partitioned into buckets so that flushing doesn't
stop the world as long.
* Add deleteMeasurement to store and shard
* Add DropMeasurement to DatabaseIndex
* Update ErrMeasurementNotFound and ErrDatabaseNotFound to not include the first line of the stack trace.
* Pulled over updates to ast and parser from master
* Updated store and shard to be able to drop series
* Pulled updates to database.go from master into tsdb/meta.go
Fixes issue where queries wouldn't be able to hit anything because the index does't load until the shard is open.
Fix an issue where field codecs weren't populated in the shard when loading.
Cory LaNou
Ben Johnson
David Norton
Philip O'Toole
Philip O'Toole
Paul Dix