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Especially random IO will be accelerated up to 200% using FastIO on Lise.
Performance Comparison of the different File Systems and SSDs with IO500
Please remember that we are comparing here a single SSD for the node local SSDs, 43 SSDs for Lustre SSD and 1000 HDDs for Lustre HDD using 32 IO processes per node. For the Lustre filesystems 64 nodes were used to achieve near maximum performance for the Lustre HDD pool. For the Home filesystem with its 120 HDDs only 16 nodes with 10 processes per node were used, as more nodes or processes overloads this small filesystem, resulting in even lower performance.
A typical user job will see lower performance values as there are usually less IO processes. The numbers for the global filesystems indicate the aggregate performance that is distributed across all users.