Release History
The Lustre file system was first installed for production use in March 2003 on the MCR Linux Cluster at LLNL, one of the largest supercomputers at the time.
Lustre 1.2.0, released in March 2004, provided Linux kernel 2.6 support, a "size glimpse" feature to avoid lock revocation on files undergoing write, and client side data write-back cache accounting (grant).
Lustre 1.4.0, released in November 2004, provided protocol compatibility between versions, InfiniBand network support, and support for extents/mballoc in the ldiskfs on-disk filesystem.
Lustre 1.6.0, released in April 2007, supported mount configuration (“mountconf”) allowing servers to be configured with "mkfs" and "mount", supported dynamic addition of object storage targets (OSTs), enabled Lustre distributed lock manager (LDLM) scalability on symmetric multiprocessing (SMP) servers, and supported free space management for object allocations.
Lustre 1.8.0, released in May 2009, provided OSS Read Cache, improves recovery in the face of multiple failures, adds basic heterogeneous storage management via OST Pools, adaptive network timeouts, and version-based recovery. It also serves as a transition release, being interoperable with both Lustre 1.6 and Lustre 2.0.
Lustre 2.0, released in August 2010, was based on many internally restructured code to prepare upcoming features. Lustre 2.x clients cannot interoperate with 1.8 or earlier servers. However, Lustre 1.8.6 and later clients can interoperate with Lustre 2.0 servers. The MDT and OST on-disk format from 1.8 can be upgraded to 2.0 without the need to reformat the filesystem.
Lustre 2.1, released in September 2011, was a community-wide initiative in response to Oracle suspending development on Lustre 2.x releases. It adds Red Hat Linux 6 server support and increases the maximum ext4-based OST size from 24 TB to 128 TB, as well as a number of performance and stability improvements. Lustre 2.1 servers remain interoperable with 1.8.6 and later clients, and is the new long-term maintenance release for Lustre.
Lustre 2.2, released in March 2012, focused on providing metadata performance improvements and new features. It adds parallel directory operations allowing multiple clients to traverse and modify a single large directory concurrently, faster recovery from server failures, increased stripe counts for a single file (across up to 2000 OSTs), and improved single-client directory traversal (ls -l, find, du) performance.
Lustre 2.3, released in October 2012, is the newest Lustre feature release. The server code was optimized to remove internal locking bottlenecks on nodes with many CPU cores (over 16). The OST added the preliminary support for using ZFS as the backing filesystem. The MDS LFSCK can verify and repair the Object Index (OI) file while the filesystem is in use. The server-side IO statistics were enhanced to allow integration with batch job schedulers such as SLURM to track per-job statistics. Client-side support was updated for Linux 3.0 kernels.
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