Deck 11: ScaleIO 1.x Server-Based SAN

Question 1

What does ScaleIO 1.31 provide to secure data at rest?

A) Obfuscation
B) Fully FIPS-compliant encryption
C) PowerPath data at rest integration
D) Encryption with RKMS key management

Answer 1

Obfuscation

Question 2

A ScaleIO cluster has been implemented with one protection domain, one storage pool, and devices from 30 SDS nodes. Each SDS contributes one, 1 TB disk device to the storage pool. Sparing has been configured whereby up to two SDS nodes can fail without data loss. What is the total usable capacity that can be provisioned using ScaleIO volumes?

A) 10 TB
B) 14 TB
C) 28 TB
D) 29 TB

Answer 2

14 TB

Question 3

You are designing a ScaleIO solution for a workload of 12,000 IO/sec with a profile of 60% reads, 40% writes. What is the total I/O rate that can be expected in ScaleIO devices due to this workload?

A) 4,800 IO/sec
B) 16,800 IO/sec
C) 19,000 IO/sec
D) 24,000 IO/sec

Answer 3

16,800 IO/sec

Question 4

A ScaleIO cluster has been implemented with one protection domain, one storage pool, and devices from 44 SDS nodes. Each SDS contributes one, 1 TB disk device to the storage pool. Sparing has been configured whereby up to four SDS nodes can fail without data loss. What is the total usable capacity that can be provisioned using ScaleIO volumes?

A) 20 TB
B) 22 TB
C) 36 TB
D) 42 TB

Question 5

What is the mandatory input in the CSV file for the ScaleIO Installation Manager?

A) Fault Set configuration for each SDS
B) Open TCP/IP ports list for each node
C) Device list for each SDS
D) IP addresses for nodes that will run the Installation Manager

Question 6

In a VMware environment, what is a benefit of using a supported RAID controller in each SDS server?

A) Higher availability with more than two copies of each volume chunk
B) Better performance with multiple SVMs per ESX server
C) Faster deployment with the use of raw device mapping for SDS devices
D) Faster SDC access to metadata information

Question 7

When implementing ScaleIO using SVMs in VMware, how is iSCSI used?

A) Present ScaleIO volumes to the ESX hosts
B) Present ScaleIO devices to the SVMs
C) Present ScaleIO volumes to the SVMs
D) Present ScaleIO devices to the ESX hosts

Question 8

What is optional in the CSV file of the ScaleIO Installation Manager?

A) Name for each SDS
B) IP address of the node that will run the primary MDM
C) IP address of the node that will run the secondary MDM
D) IP address of the node that will run the Tie Breaker

Question 9

What is the mandatory input in the CSV file of the ScaleIO Installation Manager?

A) Open TCP/IP ports list for each node
B) Clear text password for the privileged user on each node
C) Fault Set configuration for each SDS
D) IP addresses for nodes that will run the Installation Manager

Question 10

You are performing sizing calculations for a ScaleIO cluster with all servers having the same hardware configuration. This effort is being performed for a prototyping lab and high availability is not a concern. You have estimated that aggregate I/O traffic to all ScaleIO devices is 1.6 GB/sec. What is the minimum network configuration that can support this workload?

A) One 1 Gb NIC per server
B) One 10 Gb NIC per server
C) Two 10 Gb NICs per server
D) Eight 10 Gb NICs per server

Question 11

You have been asked to install a 200-node ScaleIO 1.31 cluster with a mixture of Linux and Microsoft Windows servers. Which tool should be used?

A) ScaleIO Installation Manager
B) Local Linux YUM server with a customized repository
C) Python script install.py
D) ScaleIO GUI

Question 12

An application is using two ScaleIO volumes that have been provisioned to a host. You want to use the ScaleIO consistency group feature to snapshot both volumes. What is a restriction?

A) Both volumes must come from the same ScaleIO cluster
B) Both volumes must come from the same protection domain
C) SDC must be disconnected from the host first
D) Host operating system must be Linux

Question 13

What is optional in the CSV file of the ScaleIO Installation Manager?

A) IP address of the node that will run the Tie Breaker
B) Operating system of each node
C) Clear text password for the privileged user on each node
D) Fault Set configuration for each SDS

Question 14

What is a restriction when adding an SDS to a Fault Set?

A) If the SDS already exists, it must first be removed from the cluster
B) At least one unique IP address per Fault Set is required for that SDS
C) SDS node that also has SDC installed cannot belong to a Fault Set
D) SDS must first be added to the protection domain without specifying a Fault Set

Question 15

In a ScaleIO environment, how is the Lightweight Installation Agent (LIA) configured by default?

A) Restricted from performing any supported operation
B) Allowed to perform any supported operation
C) Allowed to configure Call Home only
D) Allowed to install, but restricted from uninstalling

Question 16

A ScaleIO cluster has been configured with 10 nodes running only SDS, 20 nodes running only SDC, and one storage pool with all devices. Each SDS contributes four HDD devices to the storage pool. Each server has one 10 Gb network interface. The I/O workload is random access with a 4 Kbyte block size. What is a limiting factor for IOPs?

A) Number of HDD devices
B) Number of SDS nodes
C) Number of SDC nodes
D) Available network bandwidth

Question 17

What is a characteristic of the ScaleIO software?

A) Uses a SAN fabric for inter-process communication between hosts
B) Accelerates access to existing SAN volumes
C) Layers efficient NAS on an existing SAN solution
D) Eliminates the need for a SAN infrastructure

Question 18

What does remote Restricted SDC Access prevent?

A) Running the ScaleIO GUI in any host with the SDC installed
B) Remote login to the ScaleIO cluster from any SDC host
C) Creating a volume using the ScaleIO GUI
D) Mapping a ScaleIO volume to an SDC that is not explicitly granted access

Question 19

You are performing sizing calculations for a ScaleIO cluster with all servers having the same hardware configuration. This effort is being performed for a prototyping lab and high availability is not a concern. You have estimated that aggregate I/O traffic to all ScaleIO devices is 140 MB/sec. What is the minimum network configuration that can support this workload?

A) One 1 Gb NIC per server
B) One 10 Gb NIC per server
C) Two 10 Gb NICs per server
D) Four 10 Gb NICs per server

Question 20

What needs to be reconfigured to enable SNMP traps in a ScaleIO cluster?

A) rsyslog server
B) Primary MDM
C) ScaleIO gateway
D) IP roles for an SDS with at least two IP addresses

Question 21

In which hosts is the ScaleIO CLI binary available immediately after cluster installation?

A) Any system running the ScaleIO GUI
B) Primary and secondary MDMs, and the Tie Breaker
C) Any system running a valid Installation Manager
D) Primary and secondary MDMs

Question 22

You want to create a script that performs a sequence of operations in a ScaleIO VMware cluster. What is a valid scripting strategy?

A) Shell script with Linux SCLI commands that execute in the SVM with the primary MDM
B) BAT file with Windows CLI commands that execute in the SVM with the primary MDM
C) PowerShell script that executes in a vSphere Web Client
D) ESXi shell script that executes in the ESXi server with the primary MDM

Question 23

Which action can be performed using only the Web Client plug-in?

A) Provision a volume to an SDC
B) Enable SNMP traps
C) Switch MDM ownership
D) Disable the Tie Breaker

Question 24

A storage administrator has enabled remote restricted access in a ScaleIO cluster. What does this prevent?

A) Any configuration change from hosts other than the primary MDM
B) Login to the ScaleIO cluster from any hosts other than the primary MDM
C) Login to the ScaleIO cluster by users with the "Monitor" role
D) SSH access to the primary and secondary MDMs, and the Tie Breaker

Question 25

An administrator wants to use the SCLI to determine if ScaleIO read RAM cache is in use in a server. Which command should be used?

A) scli --query_sds
B) scli --query_protection_domain
C) scli--query_cache
D) scli -query_sdc

Question 26

What is the purpose of the scli --switch_mdm_ownership command?

A) Migrate both primary and secondary MDMs to other nodes
B) Reverse the roles of the primary and secondary MDMs
C) Migrate only the primary MDM to another node
D) Reconfigure the primary and secondary MDMs to manage another ScaleIO cluster

Question 27

Which action can be performed using the ScaleIO GUI?

A) Upgrade the SDC version on the clients
B) Map a volume to two SDCs
C) Enable restricted SDC access
D) Remove a storage pool

Question 28

What is an accurate statement about the ScaleIO Call Home feature?

A) Only configured during installation
B) E-mails are sent to EMC Customer Support by default
C) Requires that a valid e-mail address is specified
D) Maximum severity level must be specified during installation

Question 29

An administrator creates two volumes using the scli --add_volume command. The administrator uses the -- size_gb 2 parameter for the first volume and uses the -- size_gb 17 parameter for the second volume. If the remainder of the command syntax is correct, what are the sizes of the volumes created by ScaleIO?

A) One 2 GB volume and one 18 GB volume
B) One 2.16 GB volume and one 18.36 GB volume
C) One 4 GB volume and one 20 GB volume
D) One 8 GB volume and one 24 GB volume

Question 30

Due to suspected hardware failures, a ScaleIO administrator wants to monitor one specific SDS and three ScaleIO devices for the next hour. Which ScaleIO GUI feature(s) will effectively address this requirement?

A) Presets
B) Dashboard Tiles
C) Property Sheets
D) "Sort by SDS" and "Sort by Storage Pool" selectors

Question 31

How many simultaneous instances of the ScaleIO GUI can be running for a single cluster?

A) Dependent on the client OS
B) One per ScaleIO cluster
C) One instance per role, per ScaleIO cluster
D) Dependent on the role of the specific user

Question 32

Which action can be performed using the ScaleIO GUI?

A) Add a Fault Set
B) Unmap a volume from an SDC
C) Disable restricted remote access
D) Upgrade ScaleIO to a newer version

Question 33

An administrator creates a volume using the scli --add_volume command. The administrator uses the -- size_gb 9 parameter for the volume. If the remainder of the command syntax is correct, what is the size of the volume created by ScaleIO?

A) 8 GB
B) 10 GB
C) 12 GB
D) 16 GB

Question 34

An administrator has just created a ScaleIO volume on a VMware ScaleIO 1.31 cluster. To which hosts on the administrator's network can that volume be mapped?

A) Only ESXi servers running the native SDC in ESX
B) Any physical or virtual host running the SDC
C) Only VMware VMs running the VMware SDS
D) Only VMs on the ESXi servers within the same vSphere data center

Question 35

You are attempting to add multiple devices to a single storage pool. Which restriction is enforced by the ScaleIO CLI?

A) Storage pool must be deactivated first
B) Devices to be added must be in servers within the same protection domain
C) Devices to be added must have the same "Vendor ID" and "Product ID"
D) Devices to be added must have the same capacity that matches the capacity of all existing devices in the storage pool

Question 36

A ScaleIO administrator has re-configured the MDM to single mode. How will this affect the Dashboard view of the GUI?

A) Management tile will display the changed state and an alert symbol
B) No detectable effect on the Dashboard view will exist
C) Management tile will be dimmed
D) Rebuild tile will be highlighted with an alert symbol

Question 37

Which task can be performed using the ScaleIO GUI?

A) Add an MDM
B) Create and map a volume
C) Inactivate a protection domain
D) Switch MDM ownership

Question 38

When creating a volume on a ScaleIO 1.31 ESXi cluster, what are the defaults?

A) Thin, obfuscation enabled, size in multiples of 4 GB
B) Thick, obfuscation enabled, size in multiples of 4 GB
C) Thin, obfuscation disabled, size in multiples of 8 GB
D) Thick, obfuscation disabled, size in multiples of 8 GB

Question 39

Using the ScaleIO GUI, how are devices added to an SDS?

A) Maintain=> Topology=> By SDSs=> Right-click SDS=> Add device
B) Dashboard=> SDS tile=> Right-click SDS=> Add device
C) Backend=> By Storage Pool=> Right-click SDS=> Add device
D) Backend=> By SDSs=> Right-click SDS=> Add device

Question 40

What uniquely identifies each ScaleIO object?

A) ID
B) Name
C) IP address
D) License

Question 41

What accurately describes the ScaleIO RAM Cache?

A) Distributed cache enabling faster SDC access to ScaleIO metadata
B) Distributed cache that can accelerate both reads and writes
C) Local cache on each SDC with an available SSD or PCIe Flash device
D) Distributed read cache that uses server RAM in the SDS servers

Question 42

What is an accurate statement about ScaleIO event generation?

A) Primary MDM forwards all events to the Tie Breaker which logs them
B) Primary MDM logs events to a local database in that server
C) Every SDC and SDS generates events and forwards them to the primary MDM
D) Events are logged only if the optional Event Logger ScaleIO package is installed in the MDM nodes

Question 43

What is the purpose of ScaleIO throttling?

A) Balance load between the primary and secondary MDMs
B) Balance load across the SDS servers
C) Regulate overall ScaleIO traffic as well as components of that traffic
D) Reduce the host memory footprint from the MDM, SDS, and SDC components

Question 44

Which ScaleIO utility provides real-time graphical reporting of rebuild and rebalance traffic?

A) ScaleIO GUI
B) Installation Manager/Gateway
C) vSphere Web Client plug-in
D) SCLI

Question 45

A ScaleIO cluster has been installed with one protection domain, one storage pool, and 10 provisioned volumes. Fault Sets have not been configured. Two SDS servers experience hardware failures and go offline. What is the maximum severity you would expect for the generated ScaleIO events?

A) CRITICAL
B) FATAL
C) ERROR
D) WARNING

Question 46

By default, which IP role is assigned to each IP address of an SDS?

A) SDC
B) MDM
C) SDS
D) ALL