On Sat, 11 Mar 2006, Joost Kraaijeveld wrote:
On Fri, 2006-03-10 at 13:40 +0000, Richard Huxton wrote:
Your ATA disk is lying about disk caching being turned off. Assuming
each insert is in a separate transaction, then it's not going to do
10,000 / 6 = 1667 transactions/sec - that's faster than it's rotational
speed.
Could you explain the calculation? Why should the number of transactions
be related to the rotational speed of the disk, without saying anything
about the number of bytes per rotation?
each transaction requires a sync to the disk, a sync requires a real
write (which you then wait for), so you can only do one transaction per
rotation.
David Lang
