E20-017 - Information Availability Design Specialist Exam for Data Center Architects

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Example Questions

A company wants to replace its physical tape library with a virtual tape library (VTL). To deploy the VTL, the company spends $300,000 for the hardware costs and $50,000 for the implementation charges. Once the data is migrated from the physical tape library to the VTL, the physical tape library will be decommissioned for a cost of $50,000. The company will gain $70,000 per month due to this VTL implementation. What is the return on investment (ROI) in one year and the break-even point for the company’s initial investment? What accurately represents a fundamental attribute of CDP replication? In a SAN-based hot pull operation, what will ensure data consistency? A pointer-based virtual replica is created from a full volume mirror. What is the impact of restoring from the mirror on the pointer-based virtual replica? A company replaces its legacy servers with new servers every three years. Because the administrator needs to apply the same system settings as the legacy servers, the upgrade takes a long time to complete. As a result, the company experiences a lengthy downtime. The company is looking for a solution to minimize the downtime. What is a recommended solution? An organization wants to purchase an EMC Centera solution for archival purposes and to enforce the strictest data retention policies. Based on best practices, which EMC Centera version would you recommend? A company has estimated a cost of $220,000 to build its new data center. The new data center will serve an additional 20,000 clients for which the company will gain $30,000 per month. In addition, the company has agreed to spend $1,000 every month in support costs. In order to achieve a break-even point, what is the minimum time period the data center must be operational? What accurately represents a consolidated backup on a virtual machine? A company has requested your assistance in designing save area LUNs in a pointer-based virtual replication. The design needs to consider the following: Number of concurrent replication sessions = 2 Number of source LUNs = 5 Total size of the source LUNs = 500 GB Based on the information provided, which design would you recommend to the company? A company performs its backup of production data to a tape at a remote vault over an FCIP network. However, the backup takes a long time to complete. What is your recommendation to improve the backup time? A company is planning to deploy array-based synchronous remote replication between two sites over 100 MB/s FC links. The two sites are 50 miles apart. Each replication channel can handle a maximum of 1,000 IOPS. The workload profile of the application is as follows: 5,000 IO/s Read/Write Ratio = 60:40 Write block size = 8 KB 30 If design best practices are considered, how many replication channels are required for this solution when trunking is enabled? What is a key characteristic of an electronic data archive? What defines archival data? An organization is using asynchronous remote replication between two sites. Based on business requirements, they want to reduce their RPO without making a significant investment. They have additional network bandwidth available to accommodate any change. What is your recommendation to the organization? What is a minimum configuration for an EMC Avamar server using Redundant Array of Independent Nodes (RAIN)? In a cascade three-site remote replication, the Bunker and Remote targets are synchronized every two hours and data transfer between them takes 30 minutes. In the event of a disaster at the source site, what is the worst-case RPO? An organization has used a cloud-based backup service to store a large volume of its e-mail data. The organization now wants to restore the backed up data. However, they have limited bandwidth available for this operation. Which restore method would you recommend for the organization? A company has a shared pre-staged infrastructure at an alternate site. This approach enables the company to rebuild systems and applications in the event of a disaster. What is the term for this strategy? Based on strategic plans regarding green initiatives, an IT department is considering server consolidation in its data centers. Which set of elements should be included in the business value analysis to maximize the ROI for such an initiative? A company plans to locate its primary production site and secondary disaster recovery site 500 kilometers apart. You are recommending a solution that includes the use of high-end storage arrays running asynchronous replication. During the planning phase, you have estimated that: The asynchronous replication minimum cycle time is set to 30 seconds. It will take three hours to fail over to the secondary site's hardware after declaring a disaster. After the failover to the secondary site, it will take another two hours to bring up the applications. Based on the information provided, what is the minimum supported recovery point objective? Which element of a Time-State model represents an IT service failure? When using a virtual tape library, what is considered a "blind spot"? A database is using ten 8 GB devices. Continuous data protection (CDP) will be deployed to provide recovery to any point in time within a 24-hour window. The estimated rate of change of data is 10% per 24 hours. Assuming a 25% overhead due to CDP, what is the minimum recommended size of the CDP journal? A company has implemented SAN-based remote replication to perform a migration from a highend storage array to a midrange storage array. Both arrays are connected to the same SAN. The company is unable to establish a session between the two arrays to perform the migration. What is a possible cause for this issue? Asynchronous remote replication over a 10 Gb/s Fibre Channel link is planned between sites. If the upper limit of buffer-to-buffer credits is 180 and link utilization is 60%, what is the maximum distance over which data can be replicated? An organization has a large amount of legacy data and plans to move from its existing tape backup infrastructure. They have a strict compliance requirement of retaining backup data for seven years and do not want to increase the backup management cost. Which strategy do you recommend be adopted for legacy data protection? Which technology is most commonly used with NAS point-in-time copies? A company plans to implement EMC Centera as an archiving solution for its environment. They want to use Content Parity Protection as its data protection mechanism. If the EMC Centera regeneration buffer needs to be accounted for, how much usable capacity will be available to store data? A company is planning to deploy synchronous remote replication between two sites over 13 MB/s ESCON links. The two sites are 50 miles apart. The workload profile of the application is as follows: Peak work load = 3,000 I/Os per second Read/Write Ratio = 70:30 Write I/O block size = 8 KB Current average response time = 5 milliseconds (ms) 1 ms latency is added for every 125 miles If the delay per channel extender is 0.5 ms and one round trip (ESCON) equals four passes, what is the average response time of this solution? A database is using ten 9 GB devices. Continuous data protection (CDP) will be deployed to provide recovery to any point in time within a 48-hour window. The estimated rate of change of data is 20% per 24 hours. Assuming a 25% overhead due to CDP, what is the minimum recommended size of the CDP journal? In a company's environment, data from a non-EMC array needs to be migrated to an EMC Symmetrix array using Open Replicator. Before proceeding with the migration design, what should be verified on or about the non-EMC array? How would you differentiate deduplication from single-instance storage? Which EMC DiskXtender component is responsible for data movement from primary to secondary storage? An organization is using EMC Celerra Replicator v2 to replicate a file system to a remote Celerra. The organization needs to change its file system's recovery point objective by 10 minutes. 36 Which parameter needs to be adjusted to meet this requirement? What is a consideration, when performing a block-level incremental backup? Replication is performed between two sites using logical volume management (LVM). If a network outage occurs, what is a key factor that determines the maximum period of outage possible without full resynchronization? A company is planning to deploy synchronous array-based remote replication over Gigabit Ethernet links. The workload profile of the application to be replicated is as follows: 3,000 IO/s Read/Write Ratio = 70:30 Write block size = 4 KB Distance between sites = 40 kilometers 29 - - - - - - - Write-acceleration devices will not be used What is the approximate propagation delay for one write? A pointer-based virtual replica is created from a point-in-time (PIT) copy of a source LUN. What is the impact of resynchronizing the copy on the pointer-based virtual replica? A company plans to locate its disaster recovery site 1,000 kilometers away from its production site. You are recommending a solution that includes the use of high-end storage arrays running asynchronous replication. During the planning phase, you have estimated that: The asynchronous replication minimum cycle time is set to 30 seconds. It will take three hours to fail over to the secondary site's hardware after declaring a disaster. After the failover to the secondary site, it will take another two hours to bring up the applications. Based on the information provided, what is the minimum supported recovery time objective? An organization is using an asynchronous replication solution. They have additional network bandwidth available and want to reduce the RPO to meet changing business requirements. Which change can meet their requirement without requiring an additional investment? A company is using a backup server and a storage node to back up data. Currently, daily backups take more than 24 hours to complete. Backup management software analysis indicates that the physical tape libraries and network are performing fine. What would you recommend to improve backup performance? Which parameters determine the size of a bit map in full volume mirroring? In which focus area of the Information Availability Design Framework can platform integrity be found? An organization wants to deploy a centralized backup and data deduplication for its backup environment. Currently, the organization is backing up data locally at offices located at dispersed locations. In addition, they are concerned about the backup window size and data security with a centralized backup. To address the organization's needs and concerns, which EMC deduplication product would you recommend? A company uses NDMP to back up a NAS device to a dedicated tape library. The backup administrator is experiencing poor performance while restoring a small set of files. 17 What would you recommend to improve the recovery time? What accurately represents the process of replicating from a standard (thick) device to a thin device? A database is utilizing ten 9 GB, RAID 1 devices. A cascade three-site remote replication solution that includes synchronous and extended distance consistent PIT has been selected for disaster recovery. All devices involved in remote replication will have RAID 1 protection. What is the total amount of raw capacity that is required for this solution? In a synchronous replication design, what is the key consideration regarding the volume write limits (VWL)? A company is planning to migrate data from a high-end storage array to a midrange storage array. Both arrays are on the same SAN. The company has scheduled a date for the completion of the migration. 33 The data to be migrated is required for calculating year-end results and cannot be interrupted until complete. In addition, business requirements do not allow any downtime for the source data. To migrate the data within the company's environment, which solution would you recommend? What accurately represents the storing of data on an EMC Centera?

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