How much of a performance overhead is there for sub-volume automated tiering on SSDs?
Sub-volume automated tiering does trigger additional work to be performed by the storage system, whether SSDs or HDDs are involved. Although we haven’t yet tested the performance impact of sub-volume automated tiering on SSDs, there would be a significant number of writes that would occur during the scheduled data movement phase of sub-volume automated tiering, either because new data was being moved to the SSDs, or old data was being moved off the SSD, which would trigger flash media garbage collection.
There would be a performance impact, but it would be hard to predict without knowing a bit more about the particular SSDs and the tiering profile and policies.
Dig Deeper on Solid-state storage
Related Q&A from Dennis Martin
RDMA technology can help speed up I/O in storage environments by bypassing copy processes in the software stack when data is called up from a ... Continue Reading
Remote Direct Memory Access is a good way to reduce latency in flash environments and works with InfiniBand and some Ethernet connections. Continue Reading
Dennis Martin of Demartek discusses creating DIY hybrid SSD arrays by adding flash drives to an existing array. Continue Reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.