Ceph

This section focuses on Ceph

Install on local via microceph

RADOS:
OSD (object storage devices): Combine a CPU, network interface, and local cache with an underlying disk or RAID
- OSDs replace the traditional block-level interface with one in which clients can read or write byte ranges to much larger (and often variably sized) named objects, distributing low-level block allocation decisions to the devices themselves
- Clients typically interact with a metadata server (MDS) to perform metadata operations (open, rename), while communicating directly with OSDs to perform file I/O (reads and writes), significantly improving overall scalability

Three main components:

client - exposes "near-POSIX" file system interface to a host or process
cluster of OSDs, which collectively stores all data and metadata
metadata server cluster - manages the namespace (file names and directories) while coordinating security, consistency and coherence

Goals: Scalability, performance, and reliability

Last updated 5 months ago