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Tested Environments

Instead of hardware requirements, Tenable provides a transparent look at successful environments where on-prem has been tested. Consider the tested environments below and customize your environment depending on the needs of your organization.

Note: The Small asset size environment is the minimum supported environment for deploying Tenable.io on-prem

Number of Assets Tested Environment
Small (25,000 - 50,000)

Processor: 2 x Intel Xeon E5-2620v4.

Memory: 4 x 32GB RAM (128GB).

Disk: 1.5TB usable capacity. For more information, see RAID Controller Guidelines, Disk Space Usage Guidelines, and Disk Speed Guidelines.

Network: 1 x 1GB.

Medium (50,001 - 75,000)

Processor: 2 x Intel Xeon E5-2650v4.

Memory: 8 x 32GB RAM (256GB).

Disk: 1.5TB usable capacity. For more information, see RAID Controller Guidelines, Disk Space Usage Guidelines, and Disk Speed Guidelines.

Network: 1 x 1GB.

Large (75,001 - 100,000)

Processor: 2 x Intel Xeon E5-2699v4.

Memory: 8 x 32GB RAM (256GB).

Disk: 1.5TB usable capacity. For more information, see RAID Controller Guidelines, Disk Space Usage Guidelines, and Disk Speed Guidelines.

Network: 1 x 1GB.

RAID Controller Guidelines

Your RAID controller must have Write-Back cache mode enabled and at least 1GB of RAID controller cache, protected by an integrated battery backup unit (BBU).

Disk Space Usage Guidelines

You must increase your available disk space depending on your number of assets and expected scan frequency. For more information, see Add Disk Space.

Note: On-prem monitors your disk space usage and automatically shuts down the Tenable.io interface if your disk space usage exceeds 90% capacity on a filesystem.

Note: The following guidelines are based on average-sized scan results. If your scan results are smaller or larger than average, your actual usage varies.

Number of Assets Disk Space Used if Scanning Daily Disk Space Used if Scanning Weekly Disk Space Used if Scanning Monthly
25,000 10950GB per year 1560GB per year 360GB per year
50,000 27375GB per year 3900GB per year 900GB per year
100,000 54750GB per year 7800GB per year 1800GB per year

Disk Speed Guidelines

Tenable runs hardware tests on environments meeting the following disk speeds.

Number of Assets Maximum Read Maximum Write
25,000 608 IOPS 204 IOPS
50,000 1703 IOPS 568 IOPS
75,000 1945 IOPS 650 IOPS
100,000 38633 IOPS 12865 IOPS

Tenable recommends estimating your random read and write access performance by running a Flexible I/O workload test:

./fio --randrepeat=1 --ioengine=libaio --direct=1 --gtod_reduce=1 --name=test --filename=test --bs=4k --iodepth=64 --size=8G --readwrite=randrw --rwmixread=75

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