A VNX customer has several LUNs that are experiencing some performance issues. They
understand the application profile uses small-block, write-intensive, random I/O. The customer
uses snapshots for these LUNs and the bandwidth to the RLP LUNs far exceeds bandwidth to the
source LUNs.
Based on best practice, what is the maximum change rate percentage recommended if snapshots
are used on the LUNs?

A VNX customer is making a decision on the type of splitters to use with RecoverPoint/SE 3.x in
their environment. The environment has a small number of Microsoft Windows hosts with several
LUNs greater than 2 TB. After making a decision to use host splitters, the customer realizes this is
not a viable solution.
Why would the customer reach this conclusion?

A solution has been designed for a customer in which several servers will be connected to a VNX
array through CIFS. The CIFS file system size will be 1 TB. In addition, the customer is using
SnapSure; however, they are unsure about how much SavVol overhead will be required.
How much overhead is initially allocated for this solution?

A customer wants to add a SnapView snapshot to a 300 GB LUN. Captured data shows that the
LUN performs 200 random 4 KB writes per second.

What is the expected initial bandwidth at which data chunks will be written into the reserved LUN
pool?

What is the “rule of thumb” for calculating the amount of Data Mover memory SavVol space
requires?

Your customer wants to increase the length SnapSure snapshots are being kept but is concerned
about having the available capacity to extend the SavVol Space. The file system is currently 350
GiB in size and the SavVol is 20 GiB in size.
By how much capacity will the SavVol be extended when the High Watermark is reached?

In which way do VNX Snapshots differ from SnapView Snapshots?

Which VNX local protection product provides redirect on writes, point-in-time copies for block
LUNs?

A customer is purchasing EMC AppSync software and additional VNX array capacity to create
application consistent replicas of their MS Exchange databases using Microsoft Volume Shadow
Copy Service. The Storage Administrator asked for a review of the command signals and data
flows during the backup process. What are they?

What are the typical I/O characteristics of a single SnapSure SavVol?