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A customer is using an EMC VNX AVM pool populated with RAID 5 (4+1) LUNs to create file systems. The file systems support a pre-press graphics application. Cache analysis of the VNX shows a high level of coalescence and a high
percentage of dirty pages.
What is the expected write penalty?
A. 1.25A hospital wants to configure a tiered pool on an EMC VNX to support a vSphere ESXi 5.0 environment with fifteen hosts. Which disk layout is supported for a tiered pool?
A. 4 Flash drives RAID 1/0, 5 SAS RAID 5, 5 NL-SAS RAID 5You have been working with a customer of a Unified VNX. The customer is storing a very large number of files in a single file system that originally was 12 TB in size. File level deduplication was turned on for this file system, using fast file compression. This resulted in a compression rate of 33%.
You expanded the file system 28 days ago. The extra capacity was used immediately to store more files, making the total size 16 TB. You then changed the file deduplication from fast to deep file compression, but kept all other settings at their defaults.
The Customer has asked you to explain why the compression rate for the file system is now 36%. They had hopes of a compression rate around 45%.
What can you tell the customer?
A. Only the new 4 TB of data is compressed, using deep compression.A VNX customer has a production read-intensive Oracle environment that requires immediate access for end-user reporting. Which EMC replication application meets the customer's business requirement?
A. SnapView SnapshotsA customer plans to migrate their virtualized server environment to a new VNX array. They are concerned their storage pool configuration could be compromised by their varied server workload profiles. What vSphere v5.0 feature would you discuss with the customer to address their concern?
A. Clustered Datastore AffinityA customer is migrating an Oracle database to a new EMC VNX. The database consists of random, small I/O workloads with high transaction rates. What RAID type should be used for the LUN containing the data files in order to prevent I/O bottlenecks during peak load?
A. RAID 6When creating a clone, what size must the clone be when compared to the source LUN?
A. Two times the size of the source LUNA customer recently purchased an EMC VNX to be connected to four ESXi 5.0 hosts via FC. Five of the associated VMs (virtual machines) are running SQL Server 2008 R2. To avoid contention, the customer wants the VM's database and log drives on separate datastores. Which ESXi 5.0 feature would satisfy this requirement?
A. Network interface card teamingA customer is running a cluster of ESX v4.x servers accessing a VNX LUN with a very large number of virtual machines. They are experiencing intermittent transaction acknowledgement delays. What would you recommend to the customer to lessen these delays?
A. Upgrade to VMFS-5 and utilize hardware assisted lockingA customer has three production hosts connected to a VNX. Each host has two 150 GB LUNs in the same RAID 5 (4+1) RAID group. Replication Manager is configured to take SnapView snapshots of the production host LUNs for local
backups using a dedicated backup host. The RLP (reserved LUN pool) is configured on the same RAID group as the production host LUNs. The customer reports there are performance slowdowns during backups.
What is the best solution?
A. Stop the snapshots, remove the LUNs from the RLP, create a new RAID 5 (4+1) group and new LUNs, and add the new LUNs to the RLP.Nowadays, the certification exams become more and more important and required by more and more enterprises when applying for a job. But how to prepare for the exam effectively? How to prepare for the exam in a short time with less efforts? How to get a ideal result and how to find the most reliable resources? Here on Vcedump.com, you will find all the answers. Vcedump.com provide not only EMC exam questions, answers and explanations but also complete assistance on your exam preparation and certification application. If you are confused on your E20-885 exam preparations and EMC certification application, do not hesitate to visit our Vcedump.com to find your solutions here.