Metadata

Definition

Metadata in storage systems refers to data about data â€” file names, sizes, timestamps, permissions, ownership, and directory structure. Metadata performance is often the bottleneck in large-scale storage, as operations like listing directories, creating files, or checking permissions generate metadata I/O. Distributed metadata architectures (used by BeeGFS, Lustre DNE, GPFS) spread metadata across multiple servers to prevent single-server bottlenecks.

Written by
Daniel Kovacs

Updated Feb 11, 2026

Ansible

An open-source IT automation tool for configuration management and orchestration, widely used for HPC cluster and data center provisioning.

BeeGFS

A high-performance parallel file system with distributed metadata, simple administration, and built-in high availability for HPC and AI workloads.

Burst Buffer

A fast intermediate storage layer using NVMe SSDs that absorbs I/O bursts between compute nodes and the parallel file system.

Ceph

An open-source distributed storage platform providing unified object, block, and file storage with automatic data distribution and self-healing capabilities.

CXL

Compute Express Link â€” an open interconnect standard enabling high-speed communication and memory sharing between CPUs, accelerators, and memory devices.

Data Lake

A centralized repository storing raw data in its native format at scale, supporting diverse analytics workloads from batch to real-time processing.