default to lmdb for database storage#1128
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shelhamer merged 2 commits intoBVLC:masterfrom Sep 22, 2014
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lmdb is 10-15% faster than leveldb although it takes ~1.1x the storage. This is usually irrelevant in prefetching since both are fast enough, but more important lmdb allows multiple, concurrent reads for training and evaluation several models on the same data.
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default to lmdb for database storage
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lmdb is faster at read and supports concurrent access for training and evaluating multiple networks on the same data at the same time.
As a further step I vote to switch the caffe.proto default backend to lmdb from leveldb in dev with a note in the release since this changes existing model defaults. Thoughts?
Certain examples like cifar and mnist siamese have their own custom data tools that are left as leveldb.