[gpfsug-discuss] Experiences with thinly-provisioned volumes?

[Marc A Kaplan]

Also,  https://en.wikipedia.org/wiki/Write_amplification
which shows how blocks that are not needed but have not been trimmed can 
contribute to "write amplification" - SSD garbage collection may have to 
copy your stale data several times on average, which can slow overall 
performance and increase wear.  Better to "TRIM", at least with some 
devices...

Also the authors' make the point that SSD is must be over provisioned, not 
thinly provisioned


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