E20-324 - VNX Solutions Design Exam for Technology Architects

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Example Questions

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? 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? 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? 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? 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? 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? 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? 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? 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? 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? 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? 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? 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? 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? 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? 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? Your customer is running Exchange 2007 with VSS. They have just purchased RecoverPoint/SE. Which replication options are supported for their Exchange 2007 environment? 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? The majority of your customer's servers have highly utilized database applications that require predictable performance. What type of storage do you recommend? 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? 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? 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? 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? 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? When using SnapView, what happens when the Reserved LUNs assigned to a LUN become 100% full? 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? 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? 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? 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? 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)? 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? 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?