On Fri, Oct 31, 2014 at 03:56:15AM -0700, lakshmi_narayanan...@dell.com wrote: > Hi, > > Could you kindly help us with the list of all the btrfs file system > parameters , that can be tweaked for the best performance of the PCIe based > SSDs ?
It should detect the ssd option automatically, but it doesn't hurt to specify explicitly. You can use the discard option, but I would only recommend it if the SSD supports queued TRIM -- the older unqueued TRIM can cause massive performance problems. You may want to use autodefrag, which has less of an effect than it would on a rotational disk, but will still help to keep the number of extents down. That will reduce the metadata overhead. That's about all there is for btrfs-specific options, I think. Hugo. -- === Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk === PGP key: 65E74AC0 from wwwkeys.eu.pgp.net or http://www.carfax.org.uk --- make bzImage, not war ---
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