Re: Plan: journalling fixes for WAPBL

[Thor Lancelot Simon <tls%panix.com@localhost>]

On Mon, Jan 02, 2017 at 05:31:23PM +0000, David Holland wrote:
> (from a while back)
> 
> However, I'm missing something. The I/O queue depths that you need to
> get peak write performance from SSDs are larger than 31, and the test
> labs appear to have been able to do this with SATA-attached SSDs...
> what are/were they doing?

Aggressive prefetching, extreme efforts to reduce command latency at
the drive end of the SATA link (and higher link speeds), plus much
larger request sizes than we can issue.

-- 
 Thor Lancelot Simon	                                      tls%panix.com@localhost
	
			Ring the bells that still can ring.