On Wed, 16 Sep 2020, Dan Williams wrote: > On Wed, Sep 16, 2020 at 10:24 AM Mikulas Patocka <mpatocka@xxxxxxxxxx> wrote: > > > > > My first question about nvfs is how it compares to a daxfs with > > > executables and other binaries configured to use page cache with the > > > new per-file dax facility? > > > > nvfs is faster than dax-based filesystems on metadata-heavy operations > > because it doesn't have the overhead of the buffer cache and bios. See > > this: http://people.redhat.com/~mpatocka/nvfs/BENCHMARKS > > ...and that metadata problem is intractable upstream? Christoph poked > at bypassing the block layer for xfs metadata operations [1], I just > have not had time to carry that further. > > [1]: "xfs: use dax_direct_access for log writes", although it seems > he's dropped that branch from his xfs.git XFS is very big. I wanted to create something small. Mikulas
