I have several servers with pools close to or around 100TB. I would like to add a 1TB cache drive to each of these to speed up my writes to the pool. I am using Snapraid for each of these as well so at this point I don't use any balancing and would prefer not to so it doesn't interfere with the Snapraid parity. The parity kicks off at 1am every morning and runs through a good part of the day, depending on the server. This leaves me a window in the afternoon to copy new data to the pool.
Based on some of the threads in the forum, it sounds like the SSD Optimizer may not work the way I want it to. Basically, I want to copy new data to the pool, have it hit the SSD first, then once the copy is complete, immediately move the data from the SSD to the pool. Is this possible using the file placement rules? I don't quite understand all the balancers and file placement settings, I just know I don't what the balancers to change any data on the pool drives, specifically during the parity check.
Is it possible to do what I am looking for with specific settings?
