The test results are based on a model in which the constant-bandwidth safety and security video traffic remained unaffected during a single node maintenance cycle, disk rebuild, SP failure, or non-disruptive upgrade.
We used 10 GbE interfaces with no more than two SMB connections per interface. A 10 GbE interface can accommodate up to four Recorder connections at the maximum Enterprise VMS -supported values.
We performed all tests with a per-camera bandwidth of 4 Mb/s and 8 Mb/s, so a single Recorder that handles 40 MB/s can support 40 to 80 such cameras.
We performed all tests with node or drive failures in place in the cluster (for example, with Isilon FlexProtect running) to ensure a worst-case scenario for all sizing parameters.
To maximize caching performance for safety and security workloads, the Dell Technologies Safety & Security Lab recommends using two SSD system drives per node in clusters where it is supported, such as the NL-series.
The following table provides bandwidth-sizing guidelines based on our test results.
Array | Enterprise VMS version | OneFS version | Recorders per node | Bandwidth (MB/s) | Drive size | |
Per Recorder | Per node | |||||
A2000 | 7.6 | 8.2.2 | 1 | 40 | 40 | 10 TB |
2 | 35 | 70 | ||||
3 | 25 | 75 | ||||
7.5.1.7623 | 8.1.0.2 1 | 1 | 32.5 | 32.5 | 10 TB | |
2 | 32.5 | 65 | 10 TB | |||
H400 | 7.5.1.7623 | 8.1.1.1 | 1 | 31 | 31 | 8 TB |
4 | 31 | 124 | ||||
HD400 | 6.4.3.2811 | 8.0.0.2 | 1 | 37.5 | 37.5 | 6 TB |
2 | 37.5 | 75 |