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Category: E20-885

Exam E20-885: VNX Solutions Expert Exam for Implementation Engineers

What is the likely cause of the performance issue?

A customer runs a CAD/CAM application on an EMC VNX for File. The application is accessed by
users at multiple sites. The users report degraded response during peak access periods.
Performance monitoring of the file system shows a higher than expected disk queue length and a
higher than expected number of unused blocks pre-fetched. What is the likely cause of the
performance issue?

Which compound server_stats command will provide the needed information?

A customer is concerned about performance on their EMC VNX. The VNX provides storage for
several Windows and UNIX application servers. By monitoring the switches, they notice heavy
traffic between the servers and the VNX. On the VNX, the hard disks seem to be heavily
accessed.
The customer wants to know if the operation rate is well balanced between the disk volumes.
Which compound server_stats command will provide the needed information?

What is the best solution?

A 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?


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