Ploop is a disk management module for OpenVZ. It introduces a new type of storage, known as ploop devices, which are a more flexible and efficient alternative to traditional file-based storage.
Ploop devices enable OpenVZ to store container data in a single file, which can be dynamically resized and migrated across servers. They also offer a significant improvement in Input/Output operations per second (IOPS), providing better performance for disk-intensive applications.