Long description

Two blocks are shown initially. The first block is labeled I want info for item hash 4529 J H 6 F D 5 D, and the second block is labeled I want info for item hash 76 "A" G 7 6 G H 5. Between these blocks it is labeled Web Applications. Arrows from these two blocks points to the server block labeled Query Router. Three blocks labeled Shard 1, Shard 2 and Shard 3 are shown next, each block consist of the following: Master, Subordinate, subordinate. An arrow from the top of the query router block points to Shard 3 block, and an arrow from the bottom of the query router points to the Shard 1 block. On the bottom part it is labeled, The data in a large database is split across multiple shards.