The MD roadmap

Posted Feb 21, 2011 22:15 UTC (Mon) by PhracturedBlue (subscriber, #4193)
Parent article: The MD roadmap

I thought there was an effort to merge the 'md-raid' capabilities into the device-mapper system so that it would be possible to manage raid and virtual-partitioning through LVM.
I searched and couldn't find the status of that implementation, and am not sure if it is independent of Neil's work or if the change already happened/is not going to happen and Neil's work is on the 'one true software raid' driver.

I am definitely interested in the hot-replace capability. Each time I upgrade the size of my raid, i get scared at having the array downgraded for so long while recomputing all data.

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The MD roadmap

Posted Feb 22, 2011 0:08 UTC (Tue) by neilbrown (subscriber, #359) [Link]

The status of that effort is that there will be a 'raid' target available to dm devices in 2.6.38 which will provide access the md raid5 implementation.

It is likely that this will be extended to cover md raid1 as well in due course.

As features are added to md-raid they would then become available to dm-raid once the dm-raid configuration interface is enhanced to understand them.

i.e. once hot-replace is implemented for md, all that would be required for it to be available under dm would be a mechanism in the dm interface to request it.