Charles Meo <charles....@ltx.com.au> wrote:

> Note that this disk is flat out writing ~100 KB/sec, using what appear to 
> be 512b or 1k writes. The identical operation from the same tarball gets 
> around 15MB/sec in the global zone. What on earth is going on here? How do 
> I fix it?

Sun-tar and GNU-tar both unpack in small blocks by default.

Did you try star?

Star by default sets up a two process system with a shared memory in between 
(called FIFO). This shared memory allows star to operate in larger block sizes.
Note that you may need to call "star -no-fsync ..." to get the maximum 
unpack performance as star by default operated in a mode that allows to grant 
that all files really have been unpacked to stable storage.


ftp://ftp.berlios.de/pub/star/

Jörg

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