Qradar Data Node |top| -

The QRadar Data Node is not a standalone product; it is a critical component of a . Its sole purpose is to offload data storage, indexing, and search processing from the main Console (or All-in-One) and Event Processors.

| Aspect | IBM Suggests | Reality (Enterprise traffic) | |--------|--------------|-------------------------------| | RAM | 128 GB | Requires 192-256 GB if indexed fields > 200 | | Disk (Data) | 12x 1.2 TB SAS 10K | Use NVMe or at least 15K SAS. 10K causes I/O wait. | | CPU | 2x 8-core | 2x 16-core if parsing syslog (heavy on regex) | | Max data per node | 3 TB / day (compressed) | Practical limit: 1.5 TB/day before search degrades |

Verdict: Essential for horizontal scaling, but complex to tune and resource-hungry.

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