The version 1 RocksDB dump format is fairly simple:
The dump starts with the magic 8 byte identifier “ROCKDUMP”
The magic is followed by an 8 byte big-endian version which is 0x00000001.
Next are arbitrarily sized chunks of bytes prepended by 4 byte little endian number indicating how large each chunk is.
The first chunk is special and is a json string indicating some things about the creation of this dump. It contains the following keys: