I\'m developing an app in python for google app engine that count different kind of clicks with sharded counters.
If I have a User table (with a global id as primary key) that is sharded across 10 databases (DB1-DB10) based on the username, and another table tries to refer to the User 开发者_开发问答table using t
http://www.dbshards.com/articles/database-sharding-whitepapers/: Auto-increment key management. Typical auto-increment functionality
I have a postgresql c开发者_运维问答luster with different tables residing within different shards (different physical postgresql servers). EG:
is sharding based on firstchar of user\'s name an example of consistent hashing? To be sure, if i shard my database depending on the char-length of the user\'s name, is it Consistent hashing in the s
Ok i\'ve got a bit of confusion between the terms horizontal partitioning and sharding. Is sharding simply horizontal partitioning across mul开发者_运维技巧tiple databases?In short, yes. Longer answe
I simply cannot understand when or in what situation will we ever choose vertical partitioning instead of horizontal partitioning.
I Know that impo开发者_如何学Gossible to change shard key. But, when I set incorrect shard key, How to change that?dump the collection you sharded.. import it again.. set the new shard key.dump collec
I am trying to use Octopus gem for database sharding. I followed this wiki. If you need dynamic shards using
I am running a sharded mongodb environment - 3 mongod shards, 1 mongod config, 1 mongos (no replication).
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