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Dell PowerEdge SDS 100 Improving NFS performance on HPC clusters with Dell Flu - Page 8

NFS server, NFS server and storage hardware configuration, Table 1.

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Improving NFS Performance on HPC Clusters with Dell Fluid Cache for DAS Figure 2. NFS server Table 1. NFS server and storage hardware configuration Server configuration NFS SERVER PowerEdge R720 PROCESSORS Dual Intel(R) Xeon(R) CPU E5-2680 @ 2.70 GHz MEMORY 128 GB. 16 * 8 GB 1600MT/s RDIMMs INTERNAL DISKS 5 * 300 GB 15 K SAS disks Two drives configured in RAID-0 for the operating system with one additional drive as a hot spare Two drives configured in RAID-1 for swap space INTERNAL RAID CONTROLLER PERC H710P mini (internal) EXTERNAL RAID CONTROLLER PERC H810 adapter (slot 7) connected to the storage enclosures INTERCONNECT TO CLIENTS Mellanox ConnectX-3 FDR card (slot 5) Storage configuration Storage Enclosure Four PowerVault MD1200 arrays, daisy chained Hard Disks 12 * 3 TB 7200 rpm NL SAS drives per storage enclosure 8

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