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EMC ISMv2 > ISMv2 > Flashcards

ISMv2 Flashcards

Prepare for the EMC ISMv2 Exam E10-001

1
Q

Define Data:

A

a collection of raw fact from which conclusions may be drawn. [Module 1]

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2
Q

Identify factors that have contributed to the growth of digital data (4):

A

1) increase in data-processing capabilities.
2) lower cost of digital storage
3) affordable and faster communication technology
4) proliferation of applications and smart devices [Module 1]

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3
Q

What are the types of data (2)?

A

1) stuctured

2) unstructured (the majority of new data is unstructured) [Module 1]

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4
Q

Define Big Data:

A

a new and evolving concept, which refers to data sets whose sizes are beyond the capability of commonly used software tools to capture, store, manage, and process within acceptable time limits. It includes both structured and unstructured data. [Module 1]

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5
Q

Define Data Center:

A

a facility that contains storage, compute, network, and other IT resources to provide centralized data-processing capabilities. [Module 1]

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6
Q

Name core elements of a Data Center (5)

A

1) Application 2) DBMS 3) Host or Compute 4) Network 5) Storage [Module 1]

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7
Q

Define Host or Compute:

A

A computing platform (hardware, firmware and software) that runs applications and databases [Module 1]

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8
Q

Define Storage:

A

A device that stores data persistently for subsequent use [Module 1]

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9
Q

Name characteristics of a Data Center (7):

A

1) Availability 2) Security 3) Scalability 4) Performance 5) Data Integrity 6) Capacity 7) Mangeabiltiy [Module 1]

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10
Q

Name the 3 key Data Center management activities:

A

1) Monitoring 2) Reporting 3) Provisioning [Module 1]

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11
Q

Define Virtualization:

A

a technique of abstracting physical resources, such as compute, storage, and network, and making them appear as logical resources. [Module 1]

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12
Q

Define Cloud computing:

A

enables individuals or businesses to use IT resources as a service over the network. [Module 1]

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13
Q

Name 3 characteristics of I/O that influence the overall performance of a storage system:

A

1) Read vs. Write intensive
2) Sequential vs. Random Writes
3) I/O Size
[Module 2]

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14
Q

Define Application Virtualization:

A

the technique of presenting an application to an end user without any installation, integration, or dependencies on the underlying computing platform. [Module 2]

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15
Q

Define Database:

A

a structured way to store data in logically organized tables that are interrelated. [Module 2]

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16
Q

Define Device Driver:

A

a special software that permits the OS to interact with a specific device. They are hardware-dependent and OS specific. [Module 2]

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17
Q

Define Memory virtualization:

A

enables multiple applications and processes, whose aggregate memory requirement is greater than the available physical memory, to run on a host without impacting each other. [Module 2]

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18
Q

Define Logical Volume Manager (LVM):

A

software that runs on the compute system and manages logical and physical storage. LVM is an intermediate layer between the file system and physical disk. [Module 2]

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19
Q

Define Partitioning:

A

dividing a larger-capacity disk into virtual, smaller-capacity volumes. [Module 2]

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20
Q

Define Concatenation:

A

the process of groupoing several smaller disks to form a larger virtual volume. [Module 2]

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21
Q

What are 3 basic LVM components?

A

1) Physical volumes (PV)
2) Volume groups
3) a unique physical volume identifier (PVID)
[Module 2]

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22
Q

Define File:

A

a collection of related records or data stored as a unit with a name. [Module 2]

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23
Q

Define File System:

A

a hierarchical structure of files that provices easy access to data files residing withing a disk drive, a disk partition, or a logical volume. [Module 2]

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24
Q

Define file system block:

A

the smallest unit allocated for storing data. Each block is a contiguous area of the physical disk. The block size of a file system is fixed when the system is created. [Module 2]

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25
Q

Define Compute Virtualization:

A

a technique of masking or abstracting the physical hardware from the OS. It enables multiple operating systems to run concurrently on a single or clustered physical machine(s) [Module 2]

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26
Q

Define hypervisor:

A

a virtualization layer that resides between the hardware and virtual machines. Provides hardware resources, such as CPU, memory, and network to all the virtual machines. [Module 2]

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27
Q

Define Desktop Virtualization:

A

a technology which enables detachment of the user state, the OS, and the applications from endpoint devices. [Module 2]

28
Q

Name 3 physical components of connectivity between host and storage:

A

1) Host interface device
2) Port
3) cable
[Module 2]

29
Q

Define host interace (host adapter):

A

connects a host to other hosts and storage devices. A Host bus adapater is an example.
[Module 2]

30
Q

Define Host Bus Adaptor (HBA):

A

an application-specific integrated circuit (ASIC) board that performs I/O interface functions between the thost and storage, relieving the CPU from addtional I/O processing workload. [Module 2]

31
Q

Define Port:

A

a specialized outlet that enables connectivity between a host and external devices. [Module 2]

32
Q

Define Protocol:

A

enables communication between the host and storage. [Module 2]

33
Q

Define SCSI:

A

protocol that supports parallel transmission and offeres improved performance, scalability and compatibility compared to ATA. Supports up to 16 devices on a single bus and data transfer rates up to 640MB/s. [Module 2]

34
Q

Defince Serial Attached SCSI (SaS):

A

a point-to-point serial protocol that provides an alternative to parallel SCSI. SaS 2.0 supports data transfer rate up to 6 Gb/s. [Module 2]

35
Q

Define Fibre Channel:

A

protocol for high-speed communication to storage devices. Uses serial data transmission and operates over copper and optical fiber. Transmissions speeds reach up to 16 Gb/s. [Module 2]

36
Q

Define Magnetic Tape and provide some of the limitations associated with it:

A

low cost solution for long term data storage. Limitations include: sequential data access, single application access at a time, physical wear and tear, overhead to manage tapes. [Module 2]

37
Q

Define Flash drives:

A

aka solid state drives (SSDs) - use semiconductor media and provide high performance and low power consumption. [Module 2]

38
Q

Define tracks:

A

concentric rings on the platter around the spindle on a hard drive. Tracks are numbered. The tracks per inch (TPI) on the platter mesures how tightly the tracks are packed on the platter. [Module 2]

39
Q

Define sectors:

A

the smallest individually addressable unit of storage. Tracks are divided into sectors. A typical sector holds 512 bytes of data, although larger sector sizes can be used. [Module 2]

40
Q

Define cylinder:

A

a set of identical tracks on both surfaces of each driver platter. The location of R/W heads is referred to by the cylinder # not the track #.. [Module 2]

41
Q

What is disk service time?

A

the time taken by a disk to complete an I/O request.
Disk Service Time = seek time + rotational latency + data transfer time
[Module 2]

42
Q

Define seek time (access time):

A

the time taken to position the R/W heads across a platter with radial movement. [Module 2]

43
Q

Name 3 seek time specifications:

A

1) Full Stroke: time taken by the R/W head to move the entire width of the disk.
2) Average: the average time taken by the R/W head to move from one random track to another; typically 1/3 of a full stroke
3) Track-to-Track: time taken by the R/W head to move between adjacent tracks.
[Module 2]

44
Q

Define rotational latency:

A

the time taken by the platte to rotate and position the data under the R/W head. [Module 2]

45
Q

What is the formula to determine average rotational latency?

A

= .5/(x/60) where x is the RPM. in other words it is = 1/2 divided by the RPS and is given in a value of miliseconds. Example: AVG rotational latency for a 15k RPM disk is (15000/60) or 250 RPS so (1/2)/250 = 2ms.
[Module 2]

46
Q

What is data transfer rate?

A

the average amount of data per unit time that a drive can deliver to the HBA. [Module 2]

47
Q

What is internal transfer rate?

A

the speed at which data moves from a platter’s surface to the internal buffer (cache) of the disk. [Module 2]

48
Q

What is external transfer rate?

A

the rate at which data can move through the interface to the HBA. [Module 2]

49
Q

What equation represents the fundamental law of disk driver performance?

A

Avg. Response Time = (service time)/(1 - utilization %). [Module 2]

50
Q

What is the formula to determine the # of disks required to meet an application’s capacity need (Dc):

A

Dc=(total capacity required) / (capacity of a single disk). [Module 2]

51
Q

What formula represents the disks required to meet an application’s performance need (Dp)?

A

Dp=(IOPS at peak workload) / (IOPS serviced by a single disk). [Module 2]

52
Q

What formula represents the disk service time (Ts)?

A

Ts= Seek Time + (.5)/(RPM/60) + (block size)/(data transfer rate). in other words, Ts = Seek Time + Rotational Latency + Transfer Time. [Module 2]

53
Q

What formula represents the Disks required for an application?

A

the max value of the set (Dc, Dp) in other words, the max value of Disk capacity and Disck performance. [Module 2]

54
Q

What is Direct-Attached Storage (DAS)?

A

storage is connected directly to the hosts. [Module 2]

55
Q

What is VMware ESXi?

A

a hypervisor that installs on x86 hardware to enable server virtualization. [Module 2]

56
Q

What is a VM?

A

a VM is a discrete set of files that can be moved, copied and used as a template. [Module 2]

57
Q 
Which is an example of structured data?
A) PDF document
B) Web page
C) Database
D) image
A

Answer:
C) Database
[Module 1]

58
Q

Which is true about big data?
A) Captured efficiently using traditional software tools
B) Data size is beyond the capability of traditional software to process
C) Includes only unstructured data
D) Includes data from a single source

A

Answer:
B) Data Size is beyond the capability of traditional software to process.
[Module 1]

59
Q

What is a feature of information-centric architecture?
A) Prevents sharing of strage among servers
B) Consists of server, network, and storage in a single system
C) Storage is internal to the servers
D) Storage is managed centrally and independent of servers

A

Answer:
D) Storage is managed centrally and independent of servers.
[Module 1]

60
Q

What accurately describes virtualization?
A) Abstracts physical resources into logical resources?
B) Enables decentralized managemtn across data centers
C) Provides on-demand, metered services
D) Pools logical resources to provide data integrity

A

Answer:
A) Abstracts physical resources into logical resources.
[Module 1]

61
Q 
Which requirement refers to the ability of a storage solution to grow with the business?
A) Integrity
B) Availability
C) Scalability
D) Manageability
A

Answer:
C) Scalability
[Module 1]

62
Q

Which is a benefit of compute virtualization?
A) Enables compute memory swapping
B) Isolates compute memory from the applications
C) Improves compute utilization
D) Isolates compute OS from the applications

A

Answer:
C) Improves compute utilization
[Module 2]

63
Q

What best describes virtual machines?
A) All VMs share available resources equally
B) All VMs on a physical server must run same OS
C) VMs are discrete sets of files
D) VM files are deleted when VM is powered off

A

Answer:
C) VMs are discrete sets of files.
[Module 2]

64
Q

What is concatination?
A) Proces of writing disk metadata on a logical drive
B) Dividing a physical drive into multiple logical drives
C) Adding more capacity to a physical drive through de-fragmentation
D) Grouping multiple physical drives into a logical drive

A

Answer:
D) Grouping multiple physical drives into a logical drive
[Module 2]

65
Q

Which factors contribute to the overal service time of a mechanical disk?
A) Full Stroke, avg seek time, track-to-track seek time
B) Avg seek time, rotational latency, and data transfer rate
C) Disk Buffer Time, full stroke, and rotational latency
D) Internal transfer rate, external transfer rate, and buffer time

A

Answer:
B) Avg Seek time, rotational latency, and data transfer rate.
[Module 2]

66
Q 
What is a challenge of a DAS environment?
A) Deployment complexity
B) Lower performance
C) High initial investment
D) limited scalability
A

Answer:

D) Limited Scalability

EMC ISMv2 (1 decks)

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