cost of tdb transactions on ext4 with barriers

[Scott Lovenberg]

tridge at samba.org wrote:
> Hi Rusty,
>
> for completeness, here is are the results including the btrfs and xfs
> numbers:
>
>    ext3 barrier=0   1.9s
>    ext3 barrier=1   13.4s
>
>    ext4 barrier=0   2.5s
>    ext4 barrier=1   36.0s
>
>    btrfs nobarrier  29.1s  
>    btrfs barrier=1  117s
>
>    xfs   	    8.9s  
>
> (the barrier options make no difference on xfs as far as I can see).
>
> If ext4 and btrfs are the future of Linux filesystems then tdb/Samba
> are in real trouble!
>
> Cheers, Tridge
>   

I'm assuming you've got a 5400 RPM drive on your laptop.  Any chance 
these would be much better using a SSD?