.ckpt file with the file .pb

• .ckpt older version of the file is output saver.save(sess), equivalent to the current .ckpt-data
• The checkpoint file is only used to tell some TF function, which is the latest checkpoint file.
• FIG comprising .ckpt-meta-membered, i.e. computation graph structure, there is no value of the variable (see substantially in tensorboard / graph in).saver = tf.train.import_meta_graph(path_to_ckpt_meta) saver.restore(sess, path_to_ckpt_data)
• .ckpt-index is an internal need some kind of index to correctly map the first two documents, it is usually not necessary, can only .ckpt-meta and restore a model .ckpt-data.
• .pb file can save your entire chart (yuan + data). To load and use (but not training) graphics in C ++, often use it to create freeze_graph, it will .pbcreate a file from the metadata and data.