How do i know how many data is contained in LMDB ?

[오상준]

I'm using for-loop to check the number. it takes so long time when the LMDB size is huge.

Please share your method to check the number of data included in LMDB format.

[Jan]

In the python interface you can call stat() on the environment, which returns a dict. The 'entries' entry in this dict gives you the number of saved key-value samples. See https://lmdb.readthedocs.org/en/release/#storage-efficiency-limits. I am sure other APIs provide that functionality too.

Jan