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Update future branch descriptions

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martinsumner 2017-04-24 11:33:05 +01:00
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@ -29,8 +29,6 @@ There is some work required before LevelEd could be considered production ready:
- Introduction of property-based testing. - Introduction of property-based testing.
- Riak modifications to support the optimised Key/Clock scanning for hashtree rebuilds.
- Amend compaction scheduling to ensure that all vnodes do not try to concurrently compact during a single window. - Amend compaction scheduling to ensure that all vnodes do not try to concurrently compact during a single window.
- Improved handling of corrupted files. - Improved handling of corrupted files.
@ -117,3 +115,15 @@ This branch changes the behaviour slightly at the non-coordinating vnodes. Thes
This should save two object fetches (where n=3) in most circumstances. This should save two object fetches (where n=3) in most circumstances.
Note, although the branch name refers to the put fsm - the actual fsm is unchanged by this, all of the changes are within vnode_put Note, although the branch name refers to the put fsm - the actual fsm is unchanged by this, all of the changes are within vnode_put
### AAE Rebuild Acceleration
Branch: [mas-leveled-scanner-i649](https://github.com/martinsumner/riak_kv/tree/mas-leveled-scanner-i649)
Branched-From: [mas-leveled-putfsm](https://github.com/martinsumner/riak_kv/tree/mas-leveled-putfsm)
Description:
The riak_kv_sweeper which is part of the post-2.2 develop branch controls folds over objects so that multiple functions can be applied to a single fold. The only aspect of the Riak system that uses this feature at present is AAE hashtree rebuilds.
This branch modifies the kv_sweeper so that if the capability exists, and unless a sweeper has explicitly stated a requirement not to allow this feature, the sweeper can defer the fetching of the objects. This means that the sweeper will fold over the "heads" of the objects returning a specially crafter Riak Object which contains a reference to the body rather than the actual body - so that the object body can be fetched if and only if access to the object contents is requested via the riak_object module.