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How can the performance issue be resolved?

A customer configured performance monitoring and alerting for their VNX storage array.
Periodically they are getting alerts on write latency greater than 15 ms. The VNX is configured with
a pool of SAS drives and thin LUNs supporting a database application. NAR data, for a given
period which includes one of the alerts, is examined. Flash drives are installed in the VNX;
however, they are not currently used.
Examining the configuration and data shows the following:
— Host Type = Linux
— Multi-pathing = Native
— Failover Mode = 1
— Data LUNs = SP A
— Log LUNs = SP B
— LUN Queue Length = 1.9

— ABQL = 7.5
How can the performance issue be resolved?

Which ABQL value does the graph indicate?

Refer to the exhibit.

A customer has a performance problem and is using Unisphere Analyzer to investigate the issue.
They believe the problem is related to bursty data writes from the application. The Solutions
Architect (SA), who is at the customer’s location, is asked to explain how values are calculated
which could indicate this problem. The SA produces a graph, shown in the exhibit, to use in future
presentations to customers.
Which ABQL value does the graph indicate?

Which Average Queue Length value does the graph indicate?

Refer to the exhibit.

A customer has a performance problem and is using Unisphere Analyzer to investigate the issue.
They believe the problem is related to bursty data writes from the application. The Solutions
Architect (SA), who is at the customer’s location, is asked to explain how values are calculated
which could indicate this problem. The SA produces a graph, shown in the exhibit, to use in future
presentations to customers.
Which Average Queue Length value does the graph indicate?

What should the customer do?

A customer has a VNX array with ten 300 GB SAS disks installed in enclosure 0, bus 0. The
customer wants to reserve one disk as a spare and create a RAID 5 8+1 Pool with the remaining
hard drives.
The LUNs created from the pool will be used to store static data and will have very low I/O. When
the customer attempts to create the pool only five disks are available instead of nine.
What should the customer do?