Subject: Re: comparing raid-like filesystems
To: Thor Lancelot Simon <firstname.lastname@example.org>
From: Jason R Thorpe <email@example.com>
Date: 01/31/2003 22:08:50
On Sat, Feb 01, 2003 at 12:24:12AM -0500, Thor Lancelot Simon wrote:
> 1) Last time I picked one of those update floppies apart, the i960
> code on it turned out to be LZW-compressed. Is RAIDframe really
> more than 2MB of object code?
Regardless -- these RAID cards contain the RAID card, thread
scheduler, disk drivers, drivers for the SCSI/ATA controllers,
error logging, and configuration managment *in addition* to
the RAID software.
> 2) It's just plain *astounding* how inefficient some of those
> implementations are. On hardware with comparable memory bandwidth
> and CPU cycles available, *and lacking hardware XOR support*, with
> the same disks, RAIDframe is often considerably faster. I have
> never understood how some RAID vendors' firmware can consistently
> perform so poorly.
I guess you haven't run RAIDframe on a system with expensive context
-- Jason R. Thorpe <firstname.lastname@example.org>