I am pleased to announce a new release of Magma. Release 42 brings unprecedented scale and availability of persistent domain models to Squeak users. In particular, a single logical repository can now be served from multiple servers simultaneously, each hosting their own physical copy. To maintain consistency, just one server receives writes and broacasts commit-records to "warm-backup" servers asynchronously. The warm-backups ensure to keep themselves constantly up to date automatically.
Individual servers in the "Node", even the primary, can be brought off-line and back on-line without disruption to clients. Maintenance routines such as full-backup and compression may optionally be run while a repository is off-line, resulting in true 24x7 operation with no performance degradation due to maintenance jobs. The more physical copies of a repository that are brought on-line, the more read-scale the overall Node will provide. For more details, see:
http://wiki.squeak.org/squeak/6101
Scales up as well as down: Magma retains it's existing ability to scale an existing, large, multi-user repository _down_ to a single user on a single laptop easily, without a single change to application code. This can be very useful for diagnosing production issues without disturbing production.
42 one-click loads cleanly into 3.9, 3.10 and Pharo, and is supported on those images.
For now, the Magma home page still resides at:
http://wiki.squeak.org/squeak/2665
- Chris