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Solution tuning, Test bed,

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Improving NFS Performance on HPC Clusters with Dell Fluid Cache for DAS OFED Mellanox OFED 1.5.3-3.0.0 Figure 3. Test bed 2.4. Solution tuning The NFS server and the attached storage arrays are configured and tuned for optimal performance. These options were selected based on extensive studies done by the Dell HPC team. Results of these studies and the tradeoffs of the tuning options are available in [4]. Additionally the DFC configuration was tuned based on experience gained from this study. This section provides a quick summary of some of the optimizations applied to the storage solution. Detailed instructions on configuring this storage solution are provided in Appendix A: Step-by-step configuration of Dell Fluid Cache for NFS. 12

Section	Page
Executive Summary	5
1. Introduction	6
1.1. Dell Fluid Cache for DAS (direct-attached storage)	6
2. Solution design and architecture	6
2.1. NFS storage solution (baseline)	7
2.2. Dell Fluid Cache for DAS based solution	9
2.3. I/O clients test bed	10
2.4. Solution tuning	12
2.4.1. Storage	13
2.4.2. NFS server	13
2.4.3. Dell Fluid Cache for DAS	14
2.5. Tracking solution health and performance	14
2.5.1. Server health and monitoring	14
2.5.2. Dell PowerEdge Express Flash PCIe SSD health and monitoring	14
2.5.3. Dell Fluid Cache for DAS health and monitoring	16
3. Performance	16
3.1. Sequential writes and reads	17
3.2. Random writes and reads	19
3.3. Metadata tests	20
3.4. Cold-cache tests	22
4. Conclusion	25
5. References	25
Appendix A: Step-by-step configuration of Dell Fluid Cache for NFS	27
A.1. Hardware checklist and cabling	27
A.2. NFS server set up	28
A.3. NFS server configuration and tuning	29
A.4. Virtual disk configuration	31
A.5. XFS and DFC configuration	33
A.6. Useful commands and references	34
A.7. Performance tuning on clients	34
Appendix B: Benchmarks and tests	35
B.1. IOzone	35

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Improving NFS Performance on HPC Clusters with Dell Fluid Cache for DAS

OFED

Mellanox OFED 1.5.3-3.0.0

Test bed

Figure 3.

2.4.

Solution tuning

The NFS server and the attached storage arrays are configured and tuned for optimal performance.

These options were selected based on extensive studies done by the Dell HPC team. Results of these

studies and the tradeoffs of the tuning options are available in [4].

Additionally the DFC configuration was tuned based on experience gained from this study.

This section provides a quick summary of some of the optimizations applied to the storage solution.

Detailed instructions on configuring this storage solution are provided in Appendix A: Step-by-step

configuration of Dell Fluid Cache for NFS.