E20-326 - Symmetrix Solutions Design Exam for Technology Architects Exam
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You are designing a new VMAX implementation. All applications will share physical drives and participate in SRDF/S replication. The customer has two high I/O applications used for OLTP and a several low I/O applications used for testing. The customer wants to ensure the high I/O applications take precedence over the low I/O applications on the VMAX array. What do you recommend?
Implement Symmetrix Priority Controls.
A customer is using virtual provisioning on a Symmetrix VMAX which is being shared for Production and non-production workloads. What can be used to separate the different workloads?
Dynamic Cache Partitioning
Using Open replicator, when are the protection bitmap flags set to "0" on the control device?
When each track is copied.
What is the EMC recommended network quality for SRDF/S over GigE?
Less than 0.01% packet loss
What can be used to monitor free space in a thin pool on a Symmetrix VMAX?
Event daemon storevntd
Which operations are allowed by Open Replicator/LM?
Online pull only
Which operations are allowed by Open Replicator/DM?
All functions except online pull
What is a feature of Delta Set Extension pools?
DSE pools can be shared between multiple SRDF/A groups.
The SiRT featured is enabled on the RA in an SRDF/S configuration. When does the host receive the acknowledgement of a write?
IO is written to the cache at the R2 site and acknowledgement is received by the R1 site from R2 site.
An SRDF/S implementation is being designed. The RA performance limits are 3800 4k IOPS for a Fibre RF adapter. The application is doing 6000 4k IOPS with 30% writes and uses multiple volumes. How many RAs are recommended?
A customer plans to configure a storage pool on their new Symmetrix VMAX 20K. The pool must be able to withstand a dual drive failure and still offer guaranteed data access. Which RAID type should be used?
An existing TimeFinder customer migrated from a DMX-3 running Enginuity 5771 to a new VMAX array. They ask you to explain how the TimeFinder/Clone Copy on First Write (COFW) mechanism on the new VMAX array differs from their DMX-3 array. What do you tell the customer?
The VMAX array uses asynchronous COFW and the DMX-3 array uses synchronous COFW.
A company plans to deploy Symmetrix VMAX arrays in their VMware vSphere environment. The ESXi hosts will be connected to the VMAX arrays over a FC SAN. Which VMAX FA port flag is optional?
You are designing a new disaster recovery solution with VMAX arrays. During the initial project kick- off meeting, the customer reports their environment can tolerate five minutes or less of data recovery following a disaster but have not yet determined the maximum allowable downtime for their applications. The customer asks which remote replication methods you recommend for their environment. What do you recommend?
Defer making a recommendation until the application RTO is known.
A customer is implementing a Microsoft Exchange environment on a Symmetrix VMAX. The environment will be deployed on 600 GB FC 15K drives using RAID 1 data protection. The application generates 1350 I/O per second and has a 2:1 read/write ratio. What is the minimum number of drives recommended to support the application?
You are designing a Symmetrix VMAX SRDF/S over Fibre Channel solution. The production and remote data centers are 50 km apart. What is the expected write response time delay due to latency?
Your customer is adding a new database application. You are asked to design a solution to expand the current SRDF/S implementation on the customer's two Symmetrix VMAX arrays to account for this growth. As part of the sizing, you notice that the two RA ports are at 85% utilization. What should you tell your customer that the solution requires?
At least two more RAs are required
By default which discounted rate does Tier Advisor apply to software using SATA storage?
A customer has a pair of VMAX arrays configured to replicate thin devices at one site to thin devices at another site using SRDF/A. The customer wants to implement TimeFinder/Clone replication of the R1 device on the source array and asks you to confirm this is a supported configuration. What do you advise the customer?
Yes, it is supported.
A proposed SRDF/S solution was modeled with BCSD. The model assumed that the source array had 4 GigE ports. The RA Utilization chart shows the maximum utilization is at 70%. How many GigE ports should be recommended to ensure a successful implementation?
Which host-based performance tool should be used to gather data for Linux systems?
A customer has implemented a Symmetrix VMAX storage array with FAST VP as a consolidation target for four older storage systems. The storage array is running the current target Enginuity 5875 code. Pool allocation warning levels are set for 65% for the Fibre Channel pool. If all data migrated to the array is bound to the Fibre Channel pool, how should the configuration of the pool reserve capacity be set?
1% EFD, 35% FC, 1% SATA
You have used BCSD to model an SRDF/S solution. What information can be obtained from the model?
Bandwidth requirement, RA utilization, and volume exceptions
A storage administrator receives a warning message that one of the thin pools in the Symmetrix is low on storage space. The pool contains a large number of thin devices that have been fully preallocated but have small amounts of used space. What is the least disruptive and most cost effective way to make more thin pool space available?
Run zero space reclamation on the thin devices
An SRDF configuration is running in SRDF/A mode. The customer's decision to switch from SRDF/A to SRDF/S is rejected. At which percentage of write cache in use at the SRDF R2 site will this occur?
What is the minimum recommended amount of CLARiiON performance data that should be used for Tier Advisor analysis?
Using Open replicator, when are the protection bitmap flags set to "1" for each track on the control device?
When the session is created.
A customer is migrating from a DMX to a VMAX. To minimize the outage window Open Replicator hot pull has been selected to perform the migration. Which Open Replicator license is required and which array should it be applied to?
Open Replicator/LM on the VMAX.
Which FAST VP control parameter defines the amount of time FAST VP should wait after a thin device is brought under FAST VP control before performing a data movement?
Initial Analysis Period
When using Timefinder/SNAP, what is true of Save devices?
Each Save device is recommended to be equal to or less than the largest VDEV.
How is Open Replicator licensed?
Licenses are per-system and are priced by the raw capacity of the array. This is required for the control array only.
Which condition results in effective prioritization by Symmetrix Priority Controls (SPC)?
Different application classes share the same physical disks.
When designing SRDF/A, what is the recommended configuration for the DSE pool?
RAID 1 devices spread out over many disks
When working with Fibre Channel connectivity, which statement is correct about buffer credits?
Insufficient BB_Credits will result in the degradation of throughput over long distance links.
A customer is implementing a Microsoft Exchange environment on a Symmetrix VMAX. The environment will be deployed on 600 GB FC 15K drives using RAID 5 data protection. The application generates 2000 I/O per second with an I/O pattern that is 75% reads and 25% writes. What is the minimum number of drives recommended to support the application?
A customer wants data from a source to be copied to its TimeFinder/Clone target as soon as the session is created. Which option needs to be used when creating the TimeFinder/Clone session?
A customer is planning a new Microsoft Exchange 2010 environment on their Symmetrix VMAX. The customer wants to know how they can backup volumes containing active mailbox databases. What advice should be provided to the customer?
Use the VSS plug-in that ships with Exchange 2010 or Replication Manager.
What describes the difference between Asynchronous and Synchronous Copy on First Write (COFW)?
Asynchronous results in a shorter host response time as there is no COFW penalty compared to Synchronous.
A customer is using SRDF/S to replicate a Symmetrix VMAX at the production site to the VMAX at the DR site. The sites are connected using a dedicated T1 link and are 38 km apart. What will significantly improve the link service time between the 2 sites?
Upgrade to a faster link.
A customer is planning an Oracle 11g implementation. You have been asked to design the Oracle storage architecture. You recommend placing redo log files on separate drives from other Oracle files. Your customer wants an explanation of this architecture choice. What best describes the reason for this EMC recommendation?
Redo logs' write performance can affect the performance of the entire database
A Symmetrix Customer has an application that runs 24 hours a day, 7 days a week and 365 days a year. They would like to replicate the application data simultaneously to four branch offices on a nightly basis. The branch offices have EMC VNX arrays. Which solution would you recommend?
Use TimeFinder/Clone to replicate the production application. Then use Open Replicator cold push to replicate the clones.
A Symmetrix VMAX has been configured with Dynamic Cache Partitioning. What criterion must be met for a cache slot to be eligible for donation?
The fall through time must be greater than the donation age.
You are designing an SRDF over GigE solution. What is a consideration to maximize TCP connection scaling?
All GigE ports on the source array should be able to see all GigE ports on the target array.
A customer has purchased a new VMAX and is in the process of setting up Open Replicator for a migration. What is a consideration for device pairing for the migration?
New device must be the same size or larger.
What is a valid FAST VP policy that would be recommended by Tier Advisor?
EFD 400GB RAID 5 (3+1) -10% FC 15K 300GB RAID 1 - 50% SATA 7200 1TB RAID 6 (6+2) - 40%
An existing TimeFinder customer migrated from a DMX-3 running Enginuity 5771 to a new VMAX array. A colleague advised them TimeFinder/Clone performance would improve on the VMAX due to changes to the Copy on First Write (COFW) mechanism. The customer asks you to explain how the COFW mechanism changed on the VMAX. What do you advise the customer?
Uses asynchronous copy on first write (ACOFW), which has no COFW penalty.
Prior to starting an implementation, which tool should be used to automate the data collection on a UNIX host?
The SiRT feature is enabled on the RA in an SRDF/S configuration. When does the host receive the acknowledgement of a write?
When I/O is written to R2 site cache but not acknowledged yet
How many SDDF sessions can each Logical Volume support?
What is a valid action when a Symmetrix VMAX thin pool is nearly full?
Add new data devices and rebalance