Basho Leveldb

The basho-tuned leveldb embedded database was the old storage backend for DVID but was deprecated in favor of Badger, which has a much larger following and updates.

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During a DVID build, the leveldb code is compiled and linked with the DVID Go language code.

The various leveldb options are set in the basholeveldb driver under the storage package.

The dvid-backup utility assumes a leveldb directory store, takes a snapshot of the immutable files after server shutdown, and rsyncs to a backup location.

So far we have been really pleased with the performance and reliability of this system and commend the Basho team (particularly Matthew Von-Maszewski) for their great work and time answering questions.