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EMC Cloud Infrastructure & Services > Module 07 - Business Continuity in VDC > Flashcards

Module 07 - Business Continuity in VDC Flashcards

1
Q

BC planning should include end-to-end protection of resources at what three layers?

A

1) Compute, 2) Storage, 3) Network
(7. 4)

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2
Q

Six Advantages of Compute Virtualization in BC

A

1) Hardware independence, 2) Cross platform compatibility, 3) Mutual isolation, 4) Encapsulation of complete computing environment, 5) Relatively robust BC processes, 6) Higher data availability
(7. 5)

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3
Q

Restoring of data after an outage is faster & more reliable in a VDC or CDC envirnoment.

A

VDC

(7.5)

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4
Q

What are SPOFs in VDC Compute Infrastructure?

A

1) Physical server and hypervisor, 2)VM and guest OS
(7. 6)

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5
Q

SPOFs in VDC Storage Infrastructure

A

1) Storage array and its components, 2) Virtual disks
(7. 6)

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6
Q

SPOFs in VDC Network Infrastructure

A

1) Network components, 2) Virtual network
(7. 6)

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7
Q

Groups of physical servers are combined and managed as an aggregated compute resource pool in order to protect against server & hypervisor failure.

A

Clustering

(7.8)

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8
Q

Clustered servers use a clustered file system such as _____ to enable shared access to clustered storage.

A

VMFS

(7.8)

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9
Q

Uses a secondary VM running on another physical machine as a live copy of the primary VM.

A

VM Fault Tolerance

(7.9)

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10
Q

Describe VMFT Failover

A

The primary and secondary VMs check the status of each other using heartbeats. If the primary VM fails, the other takes over immediately.

(7.10)

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11
Q

True or False: The two VMs essentially access a common storage and appear as a single entity with a single IP address and a single MAC address to other VMs.

A

True

(7.10)

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12
Q

What are the redundant storage components?

A

1) Array Controllers, 2) Ports in a Storage Array, 3) Storage Arrays
(7. 11)

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13
Q

Three methods to protect physical networks using redundancy

A

1) Interconnect devices with redundant hot swappable components, 2) Redundant links and multipathing, 3) Redundant NICs and NIC teaming
(7. 12)

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14
Q

Technique to enable multiple paths for accessing the same storage device.Provides dynamic failover to an alternate path if current active path fails.

A

Multipathing to storage

(7.13)

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15
Q

Enables failover in case of physical NIC failures / link outages

A

Physical NIC teaming

(7.14)

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16
Q

True or False: After a NIC team is configured, the VM will not be aware of the underlying physical NICs.

A

True

(7.14)

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17
Q

Link aggregation standard.

A

IEEE 802.1AX-8000

(7.14)

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18
Q

Preferred type of hypervisor installation for Business Continuity.

A

Bare-metal (Type 1) hypervisor running directly on the physical compute.

(7.15)

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19
Q

Backup method that provides a way to access individual files. This method is OS dependent.

A

File-based backup

(7.17)

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20
Q

Backup method that backs up the entire VM in a large flat file. This method is OS independent.

A

Image-based backup

(7.17)

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21
Q

Backup optimization technique to reduce the overall backup size.

A

Deduplication

(7.17)

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22
Q

Three aproaches to back ups in a VDC:

A

1) Compute-based back within the VM, 2) Compute based backup at the hypervisor level, 3) Storage Array-based backup
(7. 18)

23
Q

During _________-based backup, the hypervisor reates a copy of the guest OS, its data, VM state, and configurations. Restores directly at VM level only.

A

Image

(7.19)

24
Q

Image-based backups of VMs are good candidates for the ________________ backup technique.

A

deduplication

(7.21)

25
Q

VM restore steps

A

1) Selection of VM and virtual disks to restore from backup, 2) Selection of the destination, 3) Configuration settings
(7. 22)

26
Q

VM replication is performed at the __________ level.

A

Hypervisor

(7.24)

27
Q

Pauses currently running applications within a VM and forcibly flushes all data in the memory to the disk.

A

Quiescing

(7.24)

28
Q

Two VM replication methods

A

1) Compute-based replication, 2) Storage array based replication
(7. 25)

29
Q

Is performed at the storage array level.Is similar to traditional array based replication in the CDC.Is performed either at local (primary) site or to a remote (secondary) site.

A

Storage array-based replication

(7.25)

30
Q

Enables replicating VMs between dissimilar storage.Creates VM snapshot, VM clone, or VM template.

A

Compute-based replication

(7.25)

31
Q

Preserves the state and data of a VM at a specific point in time

A

VM Snapshot

(7.26)

32
Q

An identical copy of an existing VM

A

VM Clone

(7.28)

33
Q

Does a clone VM have a separate network (IP & MAC) identity from the parent VM?

A

Yes

(7.28)

34
Q

Clone type that shares virtual disks with the parent VM

A

Linked Clone

(7.29)

35
Q

True or False: The virtual disk of the parent VM is read-only for the linked clone.

A

True

(7.29)

36
Q

How are writes of a linked clone captured?

A

Writes of the linked clone are captured in a separate delta disk of smaller size.

(7.29)

37
Q

A linked clone is made from a ____________ of the parent VM.

A

snapshot

(7.29)

38
Q

Master copy to create and provision new VMs.

A

VM Template

(7.30)

39
Q

Two ways a VM Template is created

A

1) Convert a powered-off VM into a template, 2) Clone a VM into a template
(7. 30)

40
Q

Creates copies of LUNs that contain VM files on the same storage array.

A

Array-Based Local Replication of VMs

(7.31)

41
Q

LUNs are replicated between two sites using storage array replication technology.

A

Array-Based REMOTE Replication of VMs

(7.32)

42
Q

________________ replications characteristics are limited distance & near zero RPO

A

Synchronous

(7.32)

43
Q

________________ replications characteristics are extended distance & non zero RPO

A

Asynchronous

(7.32)

44
Q

Two types of VM Migration

A

1) Server-to-Server2) Array-to-Array
(7. 33)

45
Q

True or False: In case of server-to-server VM migration, virtual disks are not moved within clustered servers.

A

True

(7.33)

46
Q

True or False: In case of array-to-array migration, virtual disks are always moved from source array to target array.

A

True

(7.33)

47
Q

4 Major Modes of VM Migration via Server-to-Server

A

1) Hot-On, 2) Cold, 3) Hot-Suspended, 4) Concurrent
(7. 34)

48
Q

Migrate a VM that is powered on.VM needs to be quiesced before migration.

A

Hot-On VM Server-to-Server Migration

(7.34)

49
Q

Migrate a VM that is powered off.

A

Cold VM Server-to-Server Migration

(7.34)

50
Q

Migrate a VM that is loaded but suspended by the hypervisor.

A

Hot-Suspended VM Server-to-Server Migration

(7.34)

51
Q

Migrate a VM simultaneously to multiple hypervisors.7.34

A

Concurrent VM Server-to-Server Migration

(7.34)

52
Q

Allows moving a live VM without ANY downtime. Independent of VM storage and type. Controlling hypervisor of the moving VM must be able to see source and target storage devices.

A

Array-to-Array VM Migration

(7.35)

53
Q

True or False: By using array-to-array VM migration, VM migration can be performed across storage types such as Fibre Channel, iSCSI, and local SCSI.

A

True

(7.35)

EMC Cloud Infrastructure & Services (8 decks)

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