performance tuning

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Hi all,

I am building a new cluster that will be using Luminous, Filestore, NVME journals and 10k sas drives. 

Is there a way to estimate proper values for:

filestore_queue_max_bytes
filestore_queue_max_ops
journal_max_write_bytes
journal_max_write_entries 

or is it a matter of testing and trial and error?

thx
Frank
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