Question -
___________ allows you to scale your cluster linearly by adding more machines.
Options:
A .  Vertical sharding
B .  Autosharding
C .  Horizontal sharding
D .  All of the mentioned
Answer: Option B
It is possible to increase capacity without any downtime, which is very important on the web when load can increase suddenly and bringing down the website for extended maintenance can cost your business large amounts of revenue.
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