Re: Summary of the Multi-Path BOF at OLS and future directions

Christoph Hellwig
2003-08-07T16:20:30Z

On Mon, Aug 04, 2003 at 08:54:55PM -0700, James Bottomley wrote:
> 1. Multi-path is relevant to more layers of the I/O stack than just
> SCSI. Thus, it makes sense to do it at the layer just above bio. This
> would either be md/multipath or the Device Mapper multi-path module.

Are the compatible? What's the downside of one vs another?

> 4. Configuration of this solution would be extremely important. The
> idea here is to rely on the udev solution currently making its way into
> the kernel and essentially have a vendor specific multi-path
> configuration as a udev plug-in.
>
> 5. Vendor value add for specific devices could be encoded both as
> configuration (udev) pieces and plug-ins to the upper layer multi-path
> driver to activate any proprietary vendor specific configuration options
> that may be needed for specific solutions.

What are examples of such value add?