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Emmy: Using either $SHARED_SSD_TMPDIR for a job specific folder (liek like $LOCAL_TMPDIR) oder set the storage pool ddn_ssd for a new directory like for Lise (there the SSD pool is called flash).
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Especially random IO will be accelerated up to 200% using FastIO on Lise or IME on Emmy.
Performance Comparison of the different File Systems and SSDs for Emmy with IO500
Please remember that we are comparing here a single SSD for the node local SSDs, 360 SSDs for IME, 43 SSDs for Lustre SSD and 1000 HDDs for Lustre HDD using 32 IO processes per node. For the global IME and Lustre filesystems 64 nodes were used to achieve near maximum performance for IME and 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.
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