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Figure 4. Network topology
NVMe transport protocol in IBM Storage Scale System 3500
The IBM Storage Scale System 3500 systems use the Non-Volatile Memory express (NVMe) drive
transport protocol.
• NVMe is designed specifically for flash technologies. It is a faster and less complicated storage drive
transport protocol than SAS.
• The NVMe-attached drives support multiple queues so that each CPU core can communicate directly
with the drive. This avoids the latency and overhead of core-to-core communication to give the best
performance.
• NVMe offers better performance and lower latencies exclusively for solid-state drives through multiple
I/O queues and other enhancements.
• High-performance IBM Storage Scale RAID supports the following RAID code options:
– 3WayReplication
– 4WayReplication
– 8+2p
– 8+3p
Note: For information about RAID code options, see IBM Storage Scale RAID Administration guide.
• The NVMe transport protocol supports industry standard NVMe flash drives.
Enterprise-level software and support
IBM Storage Scale System 3500 consists of two server canisters that run theIBM Storage Scale software,
which is a part of the IBM Spectrum
capabilities, see IBM Storage Scale.
Enterprise-level software and support are available based on the IBM Storage Scale software stack.
20 IBM Storage Scale System 3500: Hardware Planning and Installation Guide
®
family. For more information about the IBM Storage Scale
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