ZStack ZStone 5.5.0
In April 2026, ZStack ZStone officially released its latest version, ZStack ZStone 5.5.0. This release introduces a series of important features, which are described in detail below.
Release Overview
- Supports lifecycle management for High-Performance Storage volumes, including creating volumes, viewing the volume list and details, deleting volumes, and viewing performance metrics such as IOPS, bandwidth, and latency on the details page.
- Supports UnionTech OS UOS20R.
- Refactors the AIO write path to improve I/O performance in environments with a small number of slow disks.
Storage Resource
Lifecycle Management for High-Performance Storage Volumes
Starting from ZStack ZStone 5.5.0, lifecycle management is supported for High-Performance Storage volumes. You can create volumes, view the volume list and details, delete volumes, and view real-time performance metrics on the volume details page.
- Create a volume: Create a High-Performance Storage volume in a specified High-Performance Storage pool and configure its capacity.
- View details: View detailed volume information and real-time performance metrics such as IOPS, bandwidth (BW), and latency on the volume details page.
- Delete a volume: Delete a specified High-Performance Storage volume to release space in the High-Performance Storage pool.
With lifecycle management for High-Performance Storage volumes, O&M personnel can centrally manage High-Performance Storage resources from the ZStack ZStone UI. Routine volume operations no longer require access to the backend CLI, reducing O&M complexity and improving storage resource management efficiency.
System Compatibility
Support for UnionTech OS UOS20R
Starting from ZStack ZStone 5.5.0, UnionTech OS UOS20R can be used as the host operating system for ZStack ZStone storage nodes and has passed system-level compatibility certification.
Other Improvements and Fixes
- Refactored the AIO write path to improve I/O performance in environments with a small number of slow disks: The asynchronous I/O (AIO) write path is refactored and optimized to significantly improve storage I/O throughput in deployments with only a few slow disks, such as a 10-Gigabit network with two SATA SSDs. This optimization is disabled by default and can be manually enabled as needed for these specific scenarios.