[Gllug] top-like command for disk io ?

[John Hearns]

Christian Smith wrote:
> 
> 
> What are you trying to achieve? Are you trying to find IO bound 
> processes? Trying to maximize IO throughput (I assume for video 
> editing/writing)?
> 
> If you want to maximize write throughput, you can try the ext3 journal 
> for data writes using "data=journal" mount option. This allows writes to 
> be written to the journal in big batches (fast) reducing the latency of 
> synchronous writes, if any. This would ultimately increase disk traffic, 
> however, but may help in burst periods.

Good tip.

I was going to open my mouth and ask if XFS would not be a better choice 
for video applications.
Looks as if the "guaranteed rate I/O" stuff is available, but not for free:
http://techpubs.sgi.com/library/tpl/cgi-bin/getdoc.cgi/0650/bks/SGI_Admin/books/GRIO2_AG/sgi_html/ch01.html

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