High Availability and Business Continuity 15% Flashcards Preview

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Flashcards in High Availability and Business Continuity 15% Deck (58)
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1

DR Scenario that uses S3, Import/Export, Storage GW

Back and Restore

2

DR scenario that has minimal version of infra. EC2, RDS, AMIs, CF, pre-allocated ENIs

Pilot Light

3

DR scenario that reduces recovery time by having some services already ready, horizontal scaling with elbs, manual dns or auto route 53 dns based on health check, and use of autoscaling to accommodate additional load

Warm Standby

4

DR scenario that is active/active between on prem and AWS. Route53 can send traffic to either or both, autoscaling to handle additional load

Mutlisite

5

Minimum time to recovery from Glacier

3 hours

6

Does DynamoDB over Cross-Region replication

Yes

7

This service has the ability to replicate snapshots or run read replicas in other regions

RDS

8

The data storage service allows you to take snapshots to S3 and replicate them to another region

Redshift

9

This database service uses Always on Availability Groups, and Mirroring for HA

SQL

10

DB service that uses async replication to other regions for ha

MySQL

11

DB services that uses DataGuard and RAC for HA

Oracle

12

Situations that can trigger multi-az automatic failover

Loss of connectivity to primary db, storage or host failure, patching, or manually with reboot of primary db

13

These multi-az dbs use amazon's az failover tech

Oracle, PostgreSQL, MySQL, and MariaDB

14

This DB uses it's own mirroring for failover within an az

SQL

15

This DB uses copies of the data in a db cluster across multiple AZ's

Aurora

16

How many Read Replicas can you have per a single instance

5

17

Uses for Read Replicas

offloading read traffic, continual reads even during backed up or maintained, business reporting, getting io closer to customers, dr capabilities, data center migrations

18

MySQL 5.6 uses which engines? Which one is supported by AWS?

InnoDB or MYisam. InnoDB is only supported by AWS

19

Which versions of PostgreSQL is supported

9.3.5 or newer

20

Which versions of MariaDB is supported

All current versions

21

Which versions of MySQL and Oracle are supported

All current versions

22

T/F. When creating RR of your RDS database with out Multi-AZ enable you will not experience any outage.

False. Only when you have multi-az enable will you be able to take a RR without interruption. Can go offline for about a minute during snapshotting

23

Which databases support RR in a different region?

MySQL, PostgeSQL, MariaDB (RDS), and also Aurora

24

Which databases do not support RR's in a different region?

SQL and Oracle

25

T/F. Read replicas can also be mutli-az enabled

False

26

Which DB services allows for RR's of RR's

MySQL. Can increase latency

27

T/F. If creating a replica of an encrypted database the target can be un-encrypted

False. The encryption must match

28

T/F. DB snapshots and backups can be taken from RR's

False. Only can be done on the primary db

29

What DB should you use if the application does not require ACID, joins or SQL support?

DynamoDB

30

Gateway cached volumes size and totals supported

Each volume can be 32TB with 32 volumes supported. Total size of 1PB