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Replace master/slave with primary/replica

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After further feedback I've not updated the images and just made
alterations to the READMEs for mentions of master-slave to
primary-replica
This commit is contained in:
Christopher Mills
2018-09-22 06:59:59 +01:00
parent 53c0cf7de8
commit 399b2bd581
11 changed files with 33 additions and 33 deletions
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8
solutions/system_design/scaling_aws/README.md
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@@ -207,7 +207,7 @@ Our **Benchmarks/Load Tests** and **Profiling** show that our single **Web Serve
* If you are configuring your own **Load Balancer**, setting up multiple servers in [active-active](https://github.com/donnemartin/system-design-primer#active-active) or [active-passive](https://github.com/donnemartin/system-design-primer#active-passive) in multiple availability zones will improve availability
* Terminate SSL on the **Load Balancer** to reduce computational load on backend servers and to simplify certificate administration
* Use multiple **Web Servers** spread out over multiple availability zones
* Use multiple **MySQL** instances in [**Master-Slave Failover**](https://github.com/donnemartin/system-design-primer#master-slave-replication) mode across multiple availability zones to improve redundancy
* Use multiple **MySQL** instances in [**Primary-Replica Failover**](https://github.com/donnemartin/system-design-primer#primary-replica-replication) mode across multiple availability zones to improve redundancy
* Separate out the **Web Servers** from the [**Application Servers**](https://github.com/donnemartin/system-design-primer#application-layer)
* Scale and configure both layers independently
* **Web Servers** can run as a [**Reverse Proxy**](https://github.com/donnemartin/system-design-primer#reverse-proxy-web-server)
@@ -238,7 +238,7 @@ Our **Benchmarks/Load Tests** and **Profiling** show that we are read-heavy (100
* Session data from the **Web Servers**
* The **Web Servers** become stateless, allowing for **Autoscaling**
* Reading 1 MB sequentially from memory takes about 250 microseconds, while reading from SSD takes 4x and from disk takes 80x longer.<sup><a href=https://github.com/donnemartin/system-design-primer#latency-numbers-every-programmer-should-know>1</a></sup>
* Add [**MySQL Read Replicas**](https://github.com/donnemartin/system-design-primer#master-slave-replication) to reduce load on the write master
* Add [**MySQL Read Replicas**](https://github.com/donnemartin/system-design-primer#primary-replica-replication) to reduce load on the write master
* Add more **Web Servers** and **Application Servers** to improve responsiveness
*Trade-offs, alternatives, and additional details:*
@@ -313,7 +313,7 @@ We'll continue to address scaling issues due to the problem's constraints:
* A data warehouse such as Redshift can comfortably handle the constraint of 1 TB of new content per month
* With 40,000 average read requests per second, read traffic for popular content can be addressed by scaling the **Memory Cache**, which is also useful for handling the unevenly distributed traffic and traffic spikes
* The **SQL Read Replicas** might have trouble handling the cache misses, we'll probably need to employ additional SQL scaling patterns
* 400 average writes per second (with presumably significantly higher peaks) might be tough for a single **SQL Write Master-Slave**, also pointing to a need for additional scaling techniques
* 400 average writes per second (with presumably significantly higher peaks) might be tough for a single **SQL Write Primary-Replica**, also pointing to a need for additional scaling techniques
SQL scaling patterns include:
@@ -344,7 +344,7 @@ We can further separate out our [**Application Servers**](https://github.com/don
### SQL scaling patterns
* [Read replicas](https://github.com/donnemartin/system-design-primer#master-slave-replication)
* [Read replicas](https://github.com/donnemartin/system-design-primer#primary-replica-replication)
* [Federation](https://github.com/donnemartin/system-design-primer#federation)
* [Sharding](https://github.com/donnemartin/system-design-primer#sharding)
* [Denormalization](https://github.com/donnemartin/system-design-primer#denormalization)