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Architecture - DMU OSD

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Note: The content on this page reflects the state of design of a Lustre feature at a particular point in time and may contain outdated information.


DMU OSD is a implementation of OSD API for DMU.


DMU is a core of ZFS.

Use Cases

ID Quality Attribute Summary
mount usability
umount usability
fid mapping usability how we map fids to local object id (dnode)
async IO performance use async IO where possible for better performance
swapping performance protect cache from swapping (actual for userspace DMU)

Quality Attribute Scenarios

Implementation Details

here we enlist how DMU API matches OSD API