E20-324 - VNX Solutions Design Exam for Technology Architects
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Click on the calculator icon in the upper left-hand corner. Your customer wants to use a VNX system at an unmanned DR site. The system will be used exclusively as a secondary MirrorView/A system, and it is capable of performing 30,000 LUN IOPs in this role. The primary system is also a VNX. If the primary image workload consists of 4 KiB random IOs with a R/W ratio of 3:1, what is the maximum bandwidth required for the link between the VNX systems?
When documenting the customer environment prior to a storage refresh, you discover that the customer has an issue their backups do not complete every job. How should you proceed?
Have the customer resolve the issue before continuing.
A customer is planning on migrating fourteen Windows clusters onto a VNX. They want to preserve all CIFS server names. Using best practices, which option would you recommend?
Create a separate VDM for each CIFS server instance.
You are planning a file-only implementation where the customer will be using AVM. You want to make the best use of storage pools to preserve the performance of VNX. Which statement offers the best storage pool guidance for file system creation with AVM?
Use a single storage pool of the same disk type.
Click on the calculator icon in the upper left-hand corner. A customer wants to add a SnapView snapshot to a 500 GiB LUN. Captured data show that the LUN performs 500 4 KiB IOPs with a read/write ratio of 3:1. What is the expected initial bandwidth at which data chunks will be written into the Reserved LUN Pool?
Click on the calculator icon in the upper left-hand corner. Customer requirements call for a SnapView snapshot to be made of a clone prior to resynchronization. The source LUN is 512 GiB, and performs 550 random reads/s and 10 random writes/s of 4 KiB. The clone will be fractured every 10 minutes, and resynchronized after the snapshot is started. How many COFWs will be performed each time the clone is resynchronized?
A customer has a 256 GiB primary MirrorView/S image. The image workload is 1,000 IOPs of random 8 KiB I/Os, with a R/W ratio of 3:1. The secondary image is fractured for 20 seconds as the result of a connectivity failure. How much data will be copied to the secondary as part of the resynchronization process?
During a customer data gathering meeting, a discussion about applications was presented. Most of the applications will best be suited for a RAID 5 pool on the VNX. However, one of the applications has an I/O requirement for RAID 1/0 spindles. How should the RAID 1/0 application requirement be handled?
Create two separate pools, one for RAID 5 and the other for RAID 1/0.
A customer is planning on migrating their Exchange data to a VNX array. You have gathered the following information: - 6000 IOPS; 50% read/write ratio Calculating for RAID 5, what is the minimum number of 15K SAS drives required?
You are asked to design the backend layout for a large Unified Storage VNX. You find that the customer intends to use most of the disk space for block-level devices in the SAN. How should NAS RAID Groups be selected on the array for optimum AVM performance?
Evenly, across as many backend busses as possible.
Your customer has recently deployed MS SharePoint using MS SQL as the backend database. Their deployment has grown to over 1 TiB in size and continues to increase approximately 10% per month. Their users have reported performance issues. What configuration using externalization of BLOB data should you recommend?
RAID 6 with NL-SAS drives
Your customer recently bought VNX storage array to consolidate multiple NetApp arrays. The customer has Windows and UNIX servers as well NFS and CIFS file systems. What migration tools are available to migrate the data from NetApp to VNX?
Open Migrator for block; rsync and emcopy for file
A customer has a 512 GiB primary MirrorView/S image. The image workload is 1,000 IOPs of random 4 KiB IOs, with a R/W ratio of 3:1. The secondary image is fractured for 30 seconds as the result of a connectivity failure. How much data will be copied to the secondary as part of the resynchronization process?
While gathering existing customer environment information to provide a new VNX storage system solution, you have found many different HBA types, servers, operating systems, and other SAN hardware. Which wizard within E-Lab Navigator can be used to validate a new VNX storage solution?
Switch Interoperability Wizard
Your customer has purchased a VNX to upgrade the storage for an Exchange Server cluster. What tool should you use to gather performance data from the Exchange cluster?
Your customer calls you about their new replication solution. CIFS access is being interrupted intermittently on the replication target. What would you recommend to avoid interruption?
Use a checkpoint of the destination file system for client access at the destination site.
Your customer plans to use Incremental SAN Copy as part of a DR solution. The Source LUN is 512 GiB in size, and a clone of this LUN will be used as the ISC source LUN. The host accessing the LUN generates 500 4 KiB IOPS with a R/W ratio of 3:1. The clone is fractured every 30 minutes, and an ISC update is performed. How much data is moved across the link in the 30-minute period?
Your customer is designing a CIFS application with very specific high CIFS I/O requirements. What is the best recommendation when designing the CIFS storage pool?
RAID 1/0 MVM storage pool with 15K RPM drives
Click on the calculator icon in the upper left-hand corner. A customer has a 2 TiB LUN which will be mirrored with MirrorView/S. Analyzer shows the current workload to be 500 8 KiB IOPs with a R/W ratio of 3:1. The customer requires that the mirror should resynchronize within 2 hours if fractured for 10 minutes or less. How much bandwidth is required to meet customer requirements?
You get a call from the customer asking about Active Directory integration for user mapping. They have used EMC NAS products for over ten years and have extended the schema some years ago. Now they are trying to migrate to default Windows Services for UNIX (SFU, aka IDMU) for the UID/GID needs. Which statement best describes the choices available?
Old EMC domain schema extension and SFU are not overlapping, and can co-exist. The SID/UID data between them must be migrated manually.
Your customer has recently seen a significant increase in overall useable capacity of their CIFS file shares after enabling file-based deduplication. They have also noticed a significant decrease in the overall available storage on the VNX system. What is the most likely cause?
Replicator is enabled.
You have been asked to design a replication solution for file data. The replication will be from a customer's remote data center to their primary data center. The distance between the data centers is 1200 km. The initial synchronization is 125 Gb of data over a WAN (1.2 Mb/s) with a 33 ms delay. Which replication solution supports the use of physical media to transport the initial copy?
After deploying their new VNX, your customer has inquired about features and tools to optimize their VMware environment. Which tools or feature enables efficient SCSI LUN reservation methods and reduces I/O traffic during cloning or zeroing operations?
vStorage APIs for Array Integration (VAAI)
You are reviewing the MirrorView/S configuration on a VNX array. The source LUN is a metaLUN. What is the best practice for FAST Cache for component LUNs of a metaLUN source?
Enable in all component LUNs.
Which two scopes are only used by a VNX system while logging into USM?
While gathering performance data during peak workloads, which type of collection method is best suited?
Smaller periods of data collection over larger intervals
Your customer needs help understanding Unisphere statistics on a VNX, specifically the Number of Write Cache Pages. How do you explain this metric to the customer?
It is displayed per each SP, and the total number is derived from the sum of both SPs.
Your customer is running Exchange 2007 with VSS. They have just purchased RecoverPoint/SE. Which replication options are supported for their Exchange 2007 environment?
Online full, online copy, online differential
What VNX feature enables administrators to group file systems and CIFS servers into virtual containers?
A customer is migrating NFS data off the legacy non-EMC array to the VNX. The customer wants to keep downtime to a minimum. Which tool is best suited for this task?
Your customer is using the front-end iSCSI ports on their VNX. They are experiencing long delays and reduced bandwidth as they add servers to their environment. Which option will increase the customer's overall bandwidth while maintaining EMC best practices for iSCSI?
Increase the MTU to the maximum supported size allowed by the host and switch.
The majority of your customer's servers have highly utilized database applications that require predictable performance. What type of storage do you recommend?
RAID Groups with traditional LUNs
You are preparing a detailed VNX presentation for a technically-oriented customer. VNX arrays have been in their environment for over a year. One objective of the meeting is to go over historical data. The customer indicated that they would like to see Unisphere statistics as part of the analysis. Assuming that statistics logging was enabled from day one, how long does the Unisphere GUI keep its real-time statistics?
Real-time statistics cannot be saved to disk.
You have been working with a customer on sizing and implementing a RecoverPoint/SE CDP solution into their environment. The customer calls you, wanting to know how they can log in to the RecoverPoint application. What IP address should they use to accomplish this?
Management IP address for the RPA Cluster
Your customer is looking to consolidate their current Windows CIFS server virtualized on VMware to a purpose built file sharing device. Their environment consists oF. - 250-300 power users leveraging complex macros and import data from other applications - 15000-18000 average users leveraging home directories - Some files are shared between their Windows and Red Hat application teams. What key information should be collected to size and configure the VNX for their multi-protocol shares?
Windows and NFS client/server version information Active Directory Version information and number of domains User mapping tools Average number of files per server and average file size Total storage used perfmon/iostat data
A customer wants to write a script that needs to list all linked remote VNX arrays for file-based replication. What CLI command should you recommend?
When is the Copy on First Write mechanism enabled?
When the Snapshot is activated
A customer is questioning whether their Unified VNX configuration is compliant with EMC VNX best practices. To start your evaluation, what information will you ask the customer's storage administrator to provide?
Collect support materials; ArrayConfig; and EMC grabs
When using SnapView, what happens when the Reserved LUNs assigned to a LUN become 100% full?
The SnapView Session is terminated and the Reserved LUNs are returned to the Free LUNs section of the Reserved LUN Pool
A customer wants to use RecoverPoint/SE CRR. They have just realized that they need to use RecoverPoint write splitters, but do not understand how they work. What does the splitter do after it intercepts a write I/O meant for a RecoverPoint Protected LUN?
It sends a copy to the local RecoverPoint appliance.
Your customer is designing a VNX file system using CIFS quotas with a supported third-party application. What software option is required to support this implementation?
A snapshot is being used to perform a backup of the LUN. How can the backup activity impact the host performance on the source LUN?
Increased write response times.
Your customer is implementing a Unified VNX system leveraging CIFS general purpose file shares. They are implementing all virtual provisioning and FAST features to maximize storage efficiency. Which recommendations are made when leveraging virtual provisioning?
Use thin provisioning at the file level and thick LUNs within a FAST pool of storage.
Your customer has two clustered SQL servers that require direct access to LUNs located on their VNX storage array. Both servers are located in the customer's main office. The VNX storage array is located in the customer's data center, which is approximately 1.5 km from their office. Both facilities are interconnected using their existing IP network. Which protocol should be used to connect the servers to the storage array?
You are gathering data from a customer environment. You have to process a number of configuration reports. What tool provides a simple method of processing the data gathering configuration?
A customer is concerned about UserMapper database and asks you what will happen to the VNX CIFS users if UserMapper is unavailable. What do you advise them?
Only new users will be affected.
Click on the calculator icon in the upper left-hand corner. A customer has a heterogeneous pool with the following configuration: -1000 GiB of Flash, with 400 GiB free -10,000 GiB of SAS, with 2,000 GiB free -80,000 GiB of NL-SAS, with 20,000 GiB free The customer creates a new LUN with data placement policy set to "auto-tiering". The LUN is then populated it with 500 GiB of data. How will that data be distributed (numbers are approximate)?
9 GiB on Flash, 45 GiB on SAS, 446 GiB on NL-SAS
You are reviewing the array configuration of a VNX array that has MirrorView/A enabled. You notice that all the images related to MirrorView/A have FAST Cache disabled. What is the best practice for FAST Cache on MirrorView/A?
Enable on source image.
A new customer is looking at purchasing two new VNXs and wants to replicate the CIFS environment. What is a recommended configuration to have CIFS replicated?
What controls the reporting of events when using Event Monitor?