Round robin vs least connections
Missed 2×You picked round robin for long-running requests. It ignores how busy each server is, so one server can pile up.
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7 of 12
System design · Load balancing
Requests take very different amounts of time. Which strategy keeps servers evenly loaded?
ARound robin
BLeast connectionsCorrect
CRandom choice
DDNS rotation
Correct+10 XP
Least connections sends each request to the server doing the least work, so long requests don't pile up.
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Lesson 3 of 8
Load balancing
A load balancer spreads requests across servers.
Why not just use one bigger server?
One server is one point of failure. Spreading load keeps you up when a box goes down.
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Lesson 3 of 8
Load balancing
A load balancer spreads requests across servers.
Why not just use one bigger server?
One server is one point of failure. Spreading load keeps you up when a box goes down.
Saved to your notes
Ask about this lessonAsk
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Lesson 3 · Load balancing
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A load balancer spreads requests across servers.
Why not just use one bigger server?
One server is one point of failure. Spreading load keeps you up when a box goes down.
Saved to your notes
03
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What spreads traffic across many servers?
AA cache
A load balancer
CA message queue
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A single load balancer can fail
Missed 1×You marked one load balancer as fully redundant. On its own it's a single point of failure, so teams run a pair.
Lesson 3 quizStudy
When a server gets pulled
Missed 1×You said one failed health check removes a server. Most setups wait for a few failures in a row.
Lesson 3 quizStudy
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