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By Aris Setyawan (arissety) on Jun 9, 2010 2:13 PM.
What kind of replication

What kind of replication used by Mckoi DDB? Is that synchronous or asynchronous?
By Tobias Downer (toby) on Jun 9, 2010 5:27 PM.
Replication is your standard kind - when you write a bit of data it gets copied to three servers. MckoiDDB has to deal with lots of very small objects and does not wait for disk synchronization, so essentially writes become asynchronous even though they might look synchronous in the code. I'm sure we could reduce write latency when dumping large amounts of data by tightening up the buffer management though. If this becomes an important consideration I'll look into it. There is a plan to use asynchronous replication to make a backup 'hot-swap' copy of a database.
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