I married an Intel X25-E solid state drive to a traditional disk drive using aufs1. Cached directory listing seems particularly slow. Would I get dramatically better performance for this case with aufs2? Or is there a different union mount technology that I should be considering? The underlying filesystems are XFS, with many files per directory.
Jeff ============= # mount -t aufs -o br:/mnt/ssd:/mnt/rotating-rust=ro none /mnt/aufs $ time ls -U /mnt/rotating-rust | wc -l # cached 1382438 real 0m2.224s user 0m1.600s sys 0m0.900s $ time ls -U /mnt/ssd | wc -l 10099 real 0m0.013s user 0m0.000s sys 0m0.010s $ time ls -U /mnt/aufs | wc -l # same result every time 1391390 real 1m10.115s user 0m0.540s sys 1m9.430s # cat /proc/version Linux version 2.6.24-8-server ------------------------------------------------------------------------------
