Re: Setting block sizes beyond 4K

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I have an iSCSI application which takes blocks of data
from SCSI. I want the blocks to be as large as
possible, atleast for me to see the performance of the
iSCSI protocol. I intend to keep every thing in
multiples of larger block sizes. 

Can I change it by changing the parameters in the
kernel, like PAGE_SIZE(followed by block size) for
ext2 ?(The approach seems very naive !!)

Sai




--- Ribamar Santarosa de Sousa <ribamar@xxxxxxxxxxx>
wrote:

> On Wed, Oct 27, 2004 at 01:35:34AM -0700, sai
> narasimhamurthy wrote:
> > Hi , 
> > Is it possible to set block sizes of disk
> partitions
> > in the recent linux kernels beyond 4K? (say 8K)
> The
> > standard user commands (like mke2fs) has options
> only
> > to set the block sizes upto 4K. 
> > 
> > Is there a kernel hack that can to be done
> somewhere?
> > 
> 
> Why you need to set block beyond 4k? -- AFAIK 4k is
> the optimized value
> for a block ( http://www.freeos.com/articles/3912 ),
> at least in ext2.
> Well, you could be wanting just for tests and that's
> ok; not sure, 
> but i think using more than 4k in ext2 will require
> heavy hacking (why
> not using another fs?)...
> 
> -Riba
>  
> 
> > Sai
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 	
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> 



		
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