I'm trying to create DB and env using LMDB. I'm facing an issue on Env. create(). I have used LMDB documentation for this. Exception in thread "main" java.lang.ExceptionInInitializerError...

I've been experimenting with nearest neighbor algorithm for images with the style presented in this post (i.e. goal is to see how many nearly similar images there is). After getting the example ada...

import lmdb env = lmdb.open(path_to_lmdb) Now I seem to need to create a transaction and a cursor, but how do I get a list of keys that I can iterate over?

I am trying to read an image from a numpy array using PIL, by doing the following: from PIL import Image import numpy as np #img is a np array with shape (3,256,256) Image.fromarray(img) and am ...

I open a lmdb database using this code: lmdb_env = lmdb.open(source_path, readonly=True) How can I count the number of records in this database?

Creating datasets for training with Caffe I both tried using HDF5 and LMDB. However, creating a LMDB is very slow even slower than HDF5. I am trying to write ~20,000 images. Am I doing something t...

I'm trying to create an LMDB data base file in Python to be used with Caffe according to this tutorial. The commands import numpy as np and import caffe run perfectly fine. However, when I try to r...

I am testing LMDB performance with the benchmark given in http://www.lmdb.tech/bench/ondisk/. And I noticed that LMDB random writes are really slow when the data goes beyond memory. I am using a m...

The executable which uses the lmdb library is in 64 bit linux format . Because dependency libraries of the executable are in 64 bit .Building executable & lmdb lib as 32bit solution not possib...

When creating lmdb environment I can specify map size. Is there a way to determine at any point how much of the map size is used up? In other words, I need to find out how much free space is left ...

Posting here as I could not find any forums for lmdb key-value store. Is there a limit for sub-databases? What is a reasonable number of sub-databases concurrently open? I would like to have ~20...

How does one get a list of the named databases that are part of an env ? From reading some python binding docs (named database implementation), I understand the names are stored in the main (unname...

I am trying to build a deep learning model for Saliency analysis using caffe (I am using the python wrapper). But I am unable to understand how to generate the lmdb data structure for this purpose....

I've extracted features using caffe, which generates a .mdb file. Then I'm trying to read it using Python and display it as a readable number. import lmdb lmdb_env = lmdb.open('caffefeat') lmdb_t...

What would be the performance difference (reads/writes) between some C++ implementation of in-memory B-Tree (for example google btree) and the LMDB (without taking into consideration all the feacur...

I have around 1 million images to put in this dataset 10000 at a time appended to the set. I"m sure the map_size is wrong with ref from this article used this line to create the set env = lmdb...

When using caffe, to create training dataset containing images we need to create database in special format like lmdb, but there is any option to pass to caffe batch of images as for example vector...

I'm trying to understand how data is interpreted in Caffe. For that I've taken a look at the Minst Tutorial Looking at the input data definition: layers { name: "mnist" type: DATA data_param { ...

I'm considering using LMDB in a web application, which, of course, will be multi-threaded. In they Symas documentation for mdb_dbi_open it states "This function must not be called from multiple co...