diff options
Diffstat (limited to 'cpp/design_docs/new-cluster-design.txt')
| -rw-r--r-- | cpp/design_docs/new-cluster-design.txt | 23 |
1 files changed, 12 insertions, 11 deletions
diff --git a/cpp/design_docs/new-cluster-design.txt b/cpp/design_docs/new-cluster-design.txt index a162ea68ec..936530a39a 100644 --- a/cpp/design_docs/new-cluster-design.txt +++ b/cpp/design_docs/new-cluster-design.txt @@ -83,20 +83,21 @@ context. ** A new cluster design. -Clearly defined interface between broker code and cluster plug-in. +1. Clearly defined interface between broker code and cluster plug-in. -Replicate queue events rather than client data. -- Broker behavior only needs to match per-queue. -- Smaller amount of code (queue implementation) that must behave predictably. -- Events only need be serialized per-queue, allows concurrency between queues +2. Replicate queue events rather than client data. + - Only requires consistent enqueue order. + - Events only need be serialized per-queue, allows concurrency between queues + - Allows for replicated and non-replicated queues. -Use a moving queue ownership protocol to agree order of dequeues. -No longer relies on identical state and lock-step behavior to cause -identical dequeues on each broker. +3. Use a lock protocol to agree order of dequeues: only the broker + holding the lock can acqiure & dequeue. No longer relies on + identical state and lock-step behavior to cause identical dequeues + on each broker. -Use multiple CPG groups to process different queues in parallel. Use a -fixed set of groups and hash queue names to choose the group for each -queue. +4. Use multiple CPG groups to process different queues in + parallel. Use a fixed set of groups and hash queue names to choose + the group for each queue. *** Requirements |