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ISM v5 > Module 10: Data Protection (Data Backup) > Flashcards

Module 10: Data Protection (Data Backup) Flashcards

1
Q

What is a backup?

A

an additional copy of your prod data created for the sole purpose of recovering in the case of loss or corruption

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2
Q

What are the components of a backup?

A

backup client
backup server
storage node
backup target

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3
Q

What is the role of a backup client?

A

to gather data that must be backed up and sends it to storage node

also sends tracking number info to backup server

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4
Q

What is the role of the backup server?

A

manages the backup operations and maintains the backup catalog

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5
Q

What is the backup catalog?

A

contains information about the backup configuration and backup metadata

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6
Q

What is the backup configuration?

A

contains information about when to run backups - which client needs to be backed up etc.

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7
Q

What does the backup metadata contain?

A

contains information about the backed up data

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8
Q

What is the storage node for?

A

responsible for organizing the client’s data and writing the data to a backup device - controls one or more backup devices

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9
Q

What is true in most backup implementations?

A

the storage node and backup server run on the same system

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10
Q

What is a full backup?

A

copies all data on the production volume to a backup device

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11
Q

What are the pros and cons of full backups?

A

provide faster data recovery

requires more storage space/takes longer to backup

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12
Q

What is RPO responsible for when it comes to backups?

A

determines which backup copy is used to restore the production

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13
Q

What is an incremental backup?

A

copies the data that has changed since the last backup

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14
Q

What is the main advantage of incremental backups?

A

fewer files are backed up daily allowing for shorter backup windows

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15
Q

What is a backup window?

A

period during which a production volume is available to perform a backup

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16
Q

What is a cumulative backup?

A

copies the data that has changed since the last full backup

17
Q

What is the advantage/disadvantage of cumulative backups?

A

shorter restore times but as they grow they can contain more data than an incremental backup

18
Q

What is agent based backup?

A

an agent of client is installed on a VM or physical compute system - the agent streams the backup data to the backup device

19
Q

What is the affect of agent based backup?

A

impacts performance of applications running on compute systems

agent running on compute system consumes CPU cycles and memory resources

20
Q

What is image based backup?

A

makes a copy of the VM disk and configuration that is associated with a VM - backup saved as a single entity called a VM image

21
Q

What can the backup software do in image based backups?

A

send requests to VM management server to create a snapshot of the VMs to be backed up and mount it on to a proxy server

22
Q

How is an image based backup performed?

A

using the snapshot by the proxy server

23
Q

When is an image based backup used?

A

for restoring an entire VM if there is any hardware failure or human error

24
Q

What is the advantage of image based backup over agent based?

A

no agent means no CPU pulling

25
Q

What are the advantages of cloud backups?

A

reduces management overhead
gives backup services on demand
allows to recover the data anywhere

26
Q

What is key for cloud backups to work?

A

bandwidth

27
Q

What is a backup client?

A

piece of software installed on a host that is going to be backed up

28
Q

What is the main job of the backup client?

A

generate safe sets (the data you want backed up) - will transport safe sets over the LAN to storage node

29
Q

What is the storage node?

A

layer of software that resides on host that has physical connectivity to the media

30
Q

what is the main goal of the storage node?

A

to control the media - all read and write access

31
Q

What is the storage nodes relationship to safesets?

A

pack them together and start sending them to media

32
Q

What is multiplexing?

A

instead of taking one safeset at a time storage node can pack them together and ship them to media at same time

33
Q

Where does the client get installed?

A

wherever a storage node is placed

34
Q

What is the server layer?

A

gets installed on the host - manages the whole backup process

35
Q

What does the server layer manage?

A

tells clients when/where to backup data
tells storage what media to use
keeps track of all the backup catalogs

36
Q

What is metadata?

A

data of the data

ISM v5 (32 decks)

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