- introduce Query Context (Qcx) for managing database-per-shard.
- replaces the MultiTx, so mtx.go is retired and removed.
- introduces the HolderConfig struct and all Holders now have
a path from birth.
- rbf speedups on bitwise writes
- badgerdb is removed due to unresolvable write conflicts.
fixes#703#676
- lmdb as a backend (lmdb.go)
(lmdb is the fastest known transactional storage backend)
- per Tx call statics report enabled with PILOSA_CALLSTAT=true (stattx.go)
- framework for per-shard db (dbshard.go)
- txfactory handles any pair under blue-green testing (txfactory.go)
- enable CGO in Dockerfiles for lmdb
- rbf had races around the new rootRecords cache in tx
- rbf tx needed a write lock on the db now that rootRecords are written
- added a global registry for rbfDB to correctly dedup instances
- implement DeleteFragment, DeleteIndex for rbf
- use badger style keys for rbf to allow content checksumming to be list
containers in the same order
- lots of other integration of rbf into pilosa layer.
