LinuxConf Europe 2007

Photos and reports

Timetable

Programme

Registration

LPI Exams

Conference Dinner (Sunday)

Duxford Excursion (Monday)

Exhibitors and Sponsors

Accommodation

Venue

Travel

About Cambridge

Kernel Summit 2007

Other GUUG events

Other UKUUG events

Bryn M. Reeves - Red Hat

Pimp my volumes

The device-mapper provides the kernel-level abstraction to support a number of userspace volume and storage mangagement applications including LVM2, dmraid, device-mapper-multipath and EVMS.

Although many administrators are familiar with these high-level tools, the underlying driver components are often less-well-understood. Administrators and developers can benefit from a more complete understanding of these components when managing or developing for systems that use the device-mapper.

Beginning with a brief overview of the architecture and organisation of the kernel device-mapper and the interface with userspace this presentation looks beyond the basic capabilities offered by the tools and examines some of the under-the-hood features and functionality with a focus on hands-on troubleshooting, problem replication and experimentation.

Practical examples are given for common situations including recovering from a damaged volume group, simulating very large storage devices on small systems and analysing and editing LVM2 metadata.