OSD-Btrfs - a Novel Lustre OSD based on Btrfs
In this video from LUG 2015 in Denver, Shuichi Ihara and Li Xi from DDN present: OSD-Btrfs - a Novel Lustre OSD based on Btrfs.
"As the base file system, ldiskfs, now based on ext4, has been a crucial component of the Lustre file system, guaranteeing both high performance and stability. In Lustre 2.4, the Object Storage Device (OSD) layer has been restructured and a new OSD API, added on top of the OST/obdfilter layer, has been introduced. This change has made it relatively easy to add new backend file system and OpenZFS has recently been introduced as a new type of OSD.
We have built an novel OSD prototype, termed OSD-Btrfs, that is based on Btrfs. Similar to ZFS, Btrfs is Copy on Write (COW) style next generation Linux file system with a number of interesting features, such as snapshots, software RAID, and SSD-based caching. Btrfs has been merged into the Linux kernel tree several years ago. Today, Btrfs is already supported by major Linux distributions, notably RHEL7, SLES12 and Ubuntu, and its popularity as a base file systems is increasing. As an open source software, Btrfs offers an interesting choice as base file system for future, enterprise-grade versions of the Lustre file system
In the first part of our talk we will introduce the overall architecture and implementation of OSD-Btrfs. In a second part, we will discuss basic benchmark numbers as well as future work and the next implementation milestone."
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