![]() In the real world, you’re not likely to maintain the entire working set on your SSD tier, but you can get close. ![]() You can also pin critical files to the SSD tier to ensure that all processing is performed on the SSDs. ![]() If you’re not familiar with this process, see Monitor Storage Tiers Performance for an overview. nightly by default, attempts to maintain that balance by moving the active (“hot”) data to the SSD tier and moving inactive ("cool") data off the SSD tier to less expensive hard disk drives based on I/O activity since the last tiers optimization. Storage Tiers Optimization, which is performed at 1:00 a.m. That ensures that your faster SSDs will process all or most I/O, with minimal I/O performed on the slower but less expensive hard disk drives (HDDs), which are intended for storing "cold," inactive data. For optimal performance, the SSD tier should be large enough to accommodate the entire working set (all active data) of workloads that use the space. When you test the performance of a newly created tiered storage space, your goal should be to baseline ideal storage tiers performance by testing the performance of the SSD tier only.
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