A pair of VNX storage arrays is replicating between two data centers over an iSCSI connection. The SQL Admin has noticed that a small OLTP database with a write size of 4k periodically experiences increased disk response times. The Storage Admin reports that during the same period, replication sessions are taking longer to complete. The Network Admin reports degraded performance between the sites during the same period.
Why is the SQL application seeing increased disk response times from the local array?
A. Increased latency causes the MirrorView/A update cycles to take longer, increasing COFW activity.
B. The 64 KB chunk size for MirrorView/A does not match the small transaction size of the database, increasing the bandwidth required between the arrays.
C. The MirrorView/A update cycle time is too short. It should be increased to improve write folding.
D. The MirrorView/A buffer size should be adjusted to match the smaller write I/O size.
A SQL Data Warehouse database is replicating between two VNX storage systems with Incremental San Copy. The production database is on 15, 15k rpm SAS drives and the Reserved LUN Pool uses five NL- SAS drives. The database is continuously updated locally and replicated once a day to maximize the benefits of write folding. Replication takes place from 6 PM until 10 PM. At 6 PM the storage administrator notices an increase in response time of the application, which steadily improves until 10 PM.
What should be done to improve performance during replication without affecting recovery data granularity?
A. Put the Reserve LUN Pool on a similar disk and RAID type as the source volume.
B. Create a clone of the source volume and replicate the clone.
C. Expand the number of drives in the source volume to accommodate the increased I/O from the replication session.
D. Adjust the San Copy throttle to minimize the impact to the production application.
A customer is checking a NAR file in Unisphere Analyzer. They see that a RAID Group with only a single LUN is shown with consistently large Disk - Average Seek Distances. What could this indicate?
A. Randomness of the I/O
B. Write utilization
C. LUN misalignment
D. Application burstiness
A customer has designed an environment using block based LUNs presented to individual hosts. They have configured a pool to start using both thick and thin LUNs. One of the standalone servers is an archive server running on Windows. They want to maximize capacity on the standalone server since the data is no longer accessed. They have no more drives to increase LUN capacity.
How can the customer increase available capacity to the archive server?
A. Compress the data on the block based LUN
B. Add capacity to the existing LUN
C. Delete old files
D. Back up the files, reconfigure the LUN, and restore the data
A company has added a large number of users to a VMware VDI deployment. The users are complaining that the system (VNX-Block) is slow, especially when they start their shift. You have been tasked to provide an economical solution. Which technology would you use to improve performance?
A. FAST Cache
B. FAST VP
C. FAST
D. Fast VPN
As a result of suffering a catastrophic failure, your customer has requested a DR solution. The solution must introduce a higher level of availability for their Exchange 2010 system. You have recommended a strategy that involves Replication Manager with native DAG.
In what state(s) of the database would the replication occur?
A. Either active or passive
B. Active only
C. Passive only
D. Neither active nor passive
A VNX storage system is being configured to provide storage for an Exchange 2010 implementation for 2,000 users. Performance and reliability are more important than cost for the customer. What RAID configuration should be used?
A. A RAID 1/0 Group, spread across two DAEs on two separate storage system busses
B. Two RAID 5 Groups in a striped metaLUN across two DAEs, one from each back end bus
C. A RAID 1/0 Group on a single DAE
D. A RAID 6 Group which can accommodate two simultaneous drive failures
A customer is in the design phase of their SQL server implementation. They request your guidance concerning the number of disk drives needed to properly configure the database for performance. The current utilization of the database is shown below:
80% reads and 20% writes
10K SAS disks
RAID 5
1150 IOPS
What is the minimum number of disk spindles required to service the random I/O requests during usage of the SQL Server database?
A. 12
B. 14
C. 18
D. 20
Your customer has a new VNX solution configured with Flash, SAS, and NL-SAS drives. The customer requires their OLTP, VDI, Software Development, and Regulatory Compliance workloads to be distributed between the different drive types. Due to limited drive quantities only one workload type can be configured using Flash drives.
According to best practices which configuration best assigns the workloads?
A. VDI on Flash drives; OLTP on SAS; Software Development on SAS; Regulatory Compliance on NL- SAS
B. OLTP on Flash drives; VDI on SAS; Regulatory Compliance on SAS; Software Development on NL- SAS
C. OLTP on Flash drives; VDI on SAS; Software Development on SAS; Regulatory Compliance on NL- SAS
D. VDI on Flash drives; OLTP on SAS; Regulatory Compliance on SAS; Software Development on NL- SAS
A customer is in the design phase of their SQL server implementation. They request your guidance concerning the number of disk drives needed to properly configure the database for performance. The current utilization of the database is shown below:
S 85% reads and 15% writes
10K SAS disks
RAID 1/0
1150 IOPS
What is the minimum number of disk spindles required to service the random I/O requests during usage of the SQL Server database?
A. 8
B. 10
C. 12
D. 14
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