Distributed Systems

Question 1

A distributed system is a set of loosely decoupled _____

Answer 1

nodes

Question 2

Nodes bundled together can provide ______, storage, request/______

Answer 2

compute, response

Question 3

What are 3 benefits of distributed systems?

Answer 3

• Resource Sharing
• Computation Speedup
• Reliability/Availability

Question 4

Distributed OSs provide the same _______ as a regular OS

Answer 4

interface

Question 5

Distributed OSs read files from ______ machines

Answer 5

remote

Question 6

What are 2 design goals of distributed OSs?

Answer 6

• Transparency

- Scalable

Question 7

All nodes in the distributed system can ____ at any time

Answer 7

fail

Question 8

A ______ _______ is used to detect failures

Answer 8

heartbeat mechanism

Question 9

When a distributed system recovers from a failure, it adjusts cluster ________, reschedule unfinished _____, and replicate files for future ________

Answer 9

information, jobs, availability

Question 10

Application recovery by checkpointing, _______, and ______

Answer 10

lineage

Question 11

Distributed systems handle storage systems with ________, etc and caching systems with ______, etc

Answer 11

Tachyon, Cassandra

Question 12

Distributed systems handle data flow with ________, etc and graph processing systems with ______, etc

Answer 12

Spark, GraphLab

Question 13

Distributed systems handle queues with ________, etc and controllers with ______, etc

Answer 13

Kafka, Zookeeper

Question 14

Distributed systems handle schedulers with _____, etc

Answer 14

Mesos

Question 15

Distributed file systems must be __________ and performant

Answer 15

transparent

Question 16

DFS use ______ to increase remote access speeds

Answer 16

caching

Question 17

A problem with caches in DFS is that cached copies must be consistent with the _______

Answer 17

master

Question 18

What are 2 tradeoffs for DFSs?

Answer 18

• Granularity

- Location (in-memory or disk based)

Question 19

Write through is ______ and write back is _____, but there are issues with consistency and reliability

Answer 19

slow, fast

Question 20

DFS compromise periodic _____ cache and ______

Answer 20

scan, flush

Question 21

What is mesos?

Answer 21

Resource manager and scheduler