Test Objectives; Test Parameters; Tests Conducted - Dell EMC Series Server Sizing Manual

Testing and validation

Test objectives

Test parameters

Tests conducted

Dell EMC Storage with ISS SecurOS Sizing Guide
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Many factors must be considered when designing your solution.
The Dell EMC Surveillance Lab tests focus on storage-related factors with the
following objectives:
Determine the bandwidth for various Dell EMC storage arrays using FC and iSCSI.
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Determine the bandwidth for various Dell EMC storage clusters using SMB.
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Determine the best configuration parameters for Isilon and VNX storage options.
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Determine best video storage performance requirements for use with Isilon scale-
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out storage clusters and VNX storage arrays.
Determine the maximum bandwidth with multiple Video Servers.
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Determine all factors with a lab-controlled failure, such as disabling a storage
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processor, rebuilding disks, removing a node, or network path failures.
All test parameters and scenarios reflect standard production behavior for ISS
SecurOS under storage-intensive conditions, including typical storage functions and
failures. We followed best practices for recovery and break-fix issues for normal
situations that might arise in a standard production environment.
We used the following parameters to perform the tests:
Tests were conducted by loading each recorder at the maximum sustainable
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bandwidth of 64 MB/s, with 7Mbps camera bandwidths were used.
The IP network (Layer 2) is a flat, high-availability network with plenty of capacity,
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which enabled us to focus on the products we were testing.
All tests assumed uniform distribution of bandwidth from the ISS Video Server.
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We ran tests with the SmartConnect configuration in place and the SMB shares were
mounted using SmartConnect zone name:
Video playback at 20%
As video is being written to the storage, we recall or review the video at a rate
equal to 20% of the write rate.
The review did not affect the write rate, video quality, or result in dropped video.
Disk Failure test
A single disk failure is the most common failure affecting storage systems today.
When a disk fails, that disk is removed and replaced. The replacement disk is then
reconstructed.
The Isilon cluster was protected using a +2 protection scheme that allows for two
simultaneous disk failures. In our test, we failed and recovered two disks. The
SmartFail process started and the CPU utilization of the node increased with no
observed affect to the write streams.