Igniters
I'm working with the wide range of cache configurations and found (from my
standpoint) the interesting point for the discussion:
Now we have following *writeSynchronizationMode *options:
1. *FULL_ASYNC*
- primary partition updated asynchronously
- backup partitions updated asynchronously
2. *PRIMARY_SYNC*
- primary partition updated synchronously
- backup partitions updated asynchronously
3. *FULL_SYNC*
- primary partition updated synchronously
- backup partitions updated synchronously
The approach above is covering everything if you've 0 or 1 backup.
But for 2 or more backups we can't reach the following case (something
between *PRIMARY_SYNC *and *FULL_SYNC*):
- update for 1 primary and 1 backup synchronously
- update the rest of backup partitions asynchronously
The idea is to join all current modes into single one and replace
*writeSynchronizationMode
*by the new option *syncPartitions=N* (not best name just for referring)
covers the approach:
- N = 0 means *FULL_ASYNC*
- N = (backups+1) means *FULL_SYNC*
- 0 < N < (backups+1) means either *PRIMARY_SYNC *(N=1) or new mode
described above
IMO it will allow to make more flexible and consistent configurations
--
Sergey Kozlov
GridGain Systems
www.gridgain.com
