Re: Ext4 devel interlock meeting minutes (April 23, 2007)

["Aneesh Kumar" <aneesh.kumar@gmail.com>]

On 4/24/07, Avantika Mathur <mathur@linux.vnet.ibm.com> wrote:
> Ext4 Developer Interlock Call: 04/23/2007 Meeting Minutes
>
> TESTING
> - extents testing
>     - Discussed methods for testing extents on highly fragmented
> filesystems.
>     - Jose will look into possible tests, including perhaps using the
> 'aged' option in FFSB
>     - Ted suggested creating a mountoption that creates a bad block
> allocator which it jumps to a new block group every 8 blocks.  This
> would force a very large number of extents, and may be a good test for
> extents.


What i am doing for creating a large number of extents is

dd if=/dev/zero of=myfile count=10
seek=20
while [ 1 ]; do dd if=/dev/zero of=myfile count=10 seek=$seek;
seek=`expr $seek + 20`; done


-aneesh