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AWS > Storage Service > Flashcards

Storage Service Flashcards

1
Q

What is EBS?

A

Elastic Block Store is a network drive you can attach to your instance while they run

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2
Q

Can EBS persist data of an instance after the instance was terminated?

A

Yes, EBS is like an USB-stick

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3
Q

To how many instances can one EBS be mounted at a time?

A

Only to one instance!

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4
Q

How can you move an EBS to another availability zone?

A

You can use a snapshot

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5
Q

Can you just attend an EBS from us-east-1a to us-east-1b?

A

No, EBS are bound to a specific availability zone

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6
Q

What is the reason for latency with EBS?

A

The communication over the network

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7
Q

What do you know about the capacity of EBS?

A
  • EBS have a provisioned capacity (size in GBs and IOPS)
  • you get billed for all provisioned capacity
  • you can increase the capacity over time
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8
Q

Do you have to detach the (EBS) volume (from the instance) to do a snapshot?

A

No, you don’t have to, but it is recommended

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9
Q

When should you use EC2 Instance Store?

A

Use if high-performance hardware disk is needed (has better I/O performance than EBS

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10
Q

Does EC2 Instance Store persist data?

A

No, the data is lost when the instance is stopped!

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11
Q

What can you use EC2 Instance Store for?

A

EC2 Instance Store is good for:

  • buffer
  • cache
  • scratch data
  • temporary content
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12
Q

What are the risks of using EC2 Instance Store?

A

Risk of data loss -> backup and replication are your responsibility

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13
Q

What is EFS?

A

Elastic File System is a managed network file system that can be mounted on hundreds of EC2

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14
Q

Is EFS bound to an availability zone?

A

No it can be used in multi-AZs

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15
Q

What is more expensive? EFS or EC2 instance Store?

A

EFS is more expensive

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16
Q

What can you use EBS for?

A

You can create portions on it, format it, boot your operating system off it

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17
Q

What does automatically happen when you create an EBS volume in an AZ (to prevent data loss)?

A

The volume is replicated within that zone

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18
Q

Can you attach multiple volumes to one instance?

A

Yes, but both must be in the same AZ!

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19
Q

What happens to an EBS attached to an EC2 instance, if this instance is terminated?

A

The volume will be detached and can be reattached to another instance (enable quick recovery)

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20
Q

What do you know about point-in-time snapshots with EBS?

A
  • Snapshots will be stored in Amazon S3

- Snapshots can be copied across AWS Regions for geographical expansion, data center migration and disaster recovery

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21
Q

What is the volume range for EBS volumes?

A

1 GiB to 16 TiB (allocated in 1 GiB increments)

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22
Q

Name 8 usages for Amazon S3

A
  • backup and storage
  • disaster recovery
  • archive
  • hybrid cloud storage
  • application hosting
  • media hosting
  • data lake & big data analytics
  • static website
23
Q

How is data stored in S3?

A

Data is stored as objects (like files) in buckets (like directories)

24
Q

How many objects can you maximal store in a bucket (S3)

A

You can store as many objects as you want in a bucket

25
Q

What is the maximum size of an object in a S3 bucket

A

Objects can be up to 5 TB in size

26
Q

How is the durability of S3 buckets?

A

S3 delivers eleven nines of durability, which means that for every 10 Mio. objects stored customers can expect to incur an average loss of one object once every 10 thousands years

27
Q

How is the availability of S3 buckets?

A

S3 provides four nines of availability (99.99%)

28
Q

What can you say about the name of a S3 bucket?

A

The name must be globally unique (across all regions and all accounts)

29
Q

Name four common use cases for S3 buckets

A
  • backup and storage (provide data backup and storage services for others)
  • application hosting (provide services that deploy, install and manage web applications)
  • media hosting (build a redundant, scalable and highly available infrastructure that hosts video, photo or music uploads and downloads)
  • software delivery (host software applications that customers can download)
30
Q

What do you know about S3 Object Lock?

A

S3 Object Lock adopts a WORM (write once read many) model

31
Q

What do you know about Glacier Vault Lock?

A
  • adopt a WORM (write once read many)

- lock the policy for future edits (can no longer be changed)

32
Q

What do you know about S3 Websites?

A

S3 can host static websites and have them accessible on the www

33
Q

What do you know about S3 Versioning?

A
  • enabled at bucket level
  • protect against unintended deletes
  • easy roll back to previous version
34
Q

What do you know about S3 Access Logs

A
  • for audit purpose, you may want to log all access to S3 buckets
  • any request made to S3, from any account, authorized or denied, will be logged into another S3 bucket
  • very helpful to come down to the root cause of an issue, or audit usage, view suspicious patterns etc.
35
Q

What do you know about S3 Replication (CRR & SRR)?

A
  • must enable versioning in source and destination
  • Cross Region Replication (CRR)
  • CRR Use Cases: compliance, lower latency access, replication across accounts
  • Same Region Replication (SRR)
  • SRR Use Cases: log aggregation, live replication between production and test accounts
  • Buckets can be in different accounts
  • copying is asynchronous
  • must give proper IAM permission to S3
36
Q

What are the four classes of Amazon S3?

A
  • Standard
  • Standard-infrequent Access (S3 Standard IA)
  • Amazon One Zone - Infrequent Access (S3 One-Zone-IA) -> data that is accessed less f
37
Q

What is the standard class of Amazon S3?

A

intended for frequently accessed data, because it delivers low latency and high throughput

38
Q

What is the standard-infrequent Access (S3 Standard IA) class of Amazon S3?

A

accessed less frequent, but requires rapid access when needed

 - the same as standard, but lower price per GB
 - ideal for long term-storage, backup and as a data storage for disaster recovery files
39
Q

What is the Amazon One Zone - Infrequent Access (S3 One-Zone-IA) of Amazon S3?

A

data that is accessed less frequently

 - stores data only in one zone, compared to other S3 Storage classes, which store data in a minimum of 3 AZs
 - costs 20% less than standard
 - good choice for data, which can be recreated easily or secondary-backup for on-premise data
40
Q

What are the S3 Glacier and S3 Glacier Deep Archive classes of Amazon S3?

A

secure, durable and low-cost storage classes

 - provides 3 retrival options, which range from a few minutes to hours
  - it can replace tape for media and entertainment applications and assists with compliance in highly regulated organizations like healthcare, life science and financial services
41
Q

What can Amazon S3 Intelligent-Tiering offer?

A

Amazon S3 Intelligent-Tiering delivers automatic cost savings by moving data between two access tiers, configured by the costumer

42
Q

What do you know about S3 Glacier?

A
  • low cost object storage (in GB/month) meant for archiving/backup
  • provides secure and durable storage for data archiving and backup (for month, years or decades)
  • data is retained for the longer term (years)
43
Q

What do you know about the different Amazon Glacier retrieval options?

A

Amazon Glacier:

  • expedited (1 to 5 Minutes)
  • Standard (3 to 5 hours)
  • Bulk (5 to 12 hours)

Amazon Glacier Deep Archive:

  • Standard (12 hours)
  • Bulk (48 hours)
44
Q

What is the use for AWS Storage Gateway?

A

Integration between an organisation’s on-premise IT environment and the AWS storage infrastructure, so that large amount of data can be transferred into and out of the AWS cloud

45
Q

What do you know about the snow family?

A
  • Highly-secure, portable devices to collect and process data at the edge, and migrate data into and out of AWS
  • offline devices to perform data migrations (if it takes more than a week to transfer over the network, use snowball devices)
46
Q

What Snow-Family-Services can you use for data migration?

A
  • Snowcone
  • Snowball Edge
  • Snowmobile
47
Q

What Snow-Family-Services can you use for edge computing?

A
  • Snowcone

- Snowball Edge

48
Q

Name five usages for the Snow-Family-Services

A
  • limited connectivity
  • limited bandwidth
  • high network cost
  • shared bandwidth (can’t maximize the line)
  • connection stability
49
Q

What do you know about Edge Computing?

A
  • process data while it’s being created on an edge location (truck on the road, a ship, a mining station)
  • these locations may have limited/no internet access
  • can be shipped back to AWS (for transferring data for example), if needed
50
Q

What do you know AWS OpsHub?

A
  • a software you install on your computer/laptop
  • unlocking and configuring single or clustered devices
  • transferring files
  • launching and managing instances running on Snow Family devices
  • Monitor device metrics (storage capacity, active instances on your device)
  • launch compatible AWS services on your devices (z.B. EC2 instances, AWS DataSync, Network File Systems (NFS))
51
Q

What do you know about Hybrid Cloud for Storage?

A
  • part of your infrastructure is on-premise and part of it is on the cloud (due to long cloud migrations, security requirements, compliance requirements, IT strategy)
  • S3 is a proprietary service technology (unlike EFS / NFS), so how do you expose the S3 data on-premise
52
Q

What do you know about AWS Storage Gateway?

A
  • bridge between on-premise data and cloud data in S3
  • hybrid storage service to allow on-premise to seamlessly use the AWS Cloud
  • use case: disaster recovery, backup & restore, tiered storage
53
Q

What do you know about Amazon ElastiCache?

A
  • get managed Redis or Memcached
  • caches are in-memory databases with high performance, low latency
  • helps reduce load off databases for read intensive workloads
  • AWS takes care of OS maintenance /patching, optimizations, setup, configuration, monitoring, failure recovery and backups

AWS (6 decks)

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