Wednesday, April 9, 2014
Why aren't multi-object updates atomic?
Losing ACID across shards isn't an excuse for not having it within a shard. Applications control the shard key and can co-locate data that would benefit from this feature. Performance imperfections in the product, limits in the product and application data models will require this in some deployments.
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RocksDB on a big server: LRU vs hyperclock
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