Clustered file systems is the first/best example that
comes to mind. Host A and Host B can both request from diskfarm, eg. 

-----Original Message-----
From: Bruce Momjian [mailto:[EMAIL PROTECTED] 
Sent: Tuesday, April 19, 2005 12:10 PM
To: Mohan, Ross
Subject: Re: [PERFORM] How to improve db performance with $7K?

Mohan, Ross wrote:
> The only part I am pretty sure about is that real-world experience 
> shows SCSI is better for a mixed I/O environment.  Not sure why, 
> exactly, but the command queueing obviously helps, and I am not sure 
> what else does.
> ||  TCQ is the secret sauce, no doubt. I think NCQ (the SATA version 
> || of per se drive request reordering)
>    should go a looong way (but not all the way) toward making SATA 
> 'enterprise acceptable'. Multiple 
>    initiators (e.g. more than one host being able to talk to a drive) is a 
> biggie, too. AFAIK only SCSI
>    drives/controllers do that for now.

What is 'multiple initiators' used for in the real world?

  Bruce Momjian                        |               |  (610) 359-1001
  +  If your life is a hard drive,     |  13 Roberts Road
  +  Christ can be your backup.        |  Newtown Square, Pennsylvania 19073

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