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2 changes: 1 addition & 1 deletion system-design/system-design-interview/chapter02/README.md
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Expand Up @@ -85,7 +85,7 @@ Web tier looks lit now. But what about the data tier?
Database replication can usually be achieved via master/slave replication (side note - nowadays, it's usually referred to as primary/secondary replication).

A master database generally only supports writes. Slave databases store copies of the data from the master & only support read operations.
This setup works well for most applications as there's usually a higher write to read ratio. Reads can easily be scaled by adding more slave instances.
This setup works well for most applications as there's usually a higher read to write ratio. Reads can easily be scaled by adding more slave instances.
![master-slave-replication](images/master-slave-replication.png)

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