[dm-devel] deterministic io throughput in multipath

[Benjamin Marzinski]

Have you looked into the delay_watch_checks and delay_wait_checks
configuration parameters?  The idea behind them is to minimize the use
of paths that are intermittently failing.

-Ben

On Mon, Dec 19, 2016 at 11:50:36AM +0000, Muneendra Kumar M wrote:
>    Customers using Linux host (mostly RHEL host) using a SAN network for
>    block storage, complain the Linux multipath stack is not resilient to
>    handle non-deterministic storage network behaviors. This has caused many
>    customer move away to non-linux based servers. The intent of the below
>    patch and the prevailing issues are given below. With the below design we
>    are seeing the Linux multipath stack becoming resilient to such network
>    issues. We hope by getting this patch accepted will help in more Linux
>    server adoption that use SAN network.
> 
>    I have already sent the design details to the community in a different
>    mail chain and the details are available in the below link.
> 
>    [1]https://www.redhat.com/archives/dm-devel/2016-December/msg00122.html.
> 
>    Can you please go through the design and send the comments to us.  
> 
>     
> 
>    Regards,
> 
>    Muneendra.
> 
>     
> 
>     
> 
> References
> 
>    Visible links
>    1. https://www.redhat.com/archives/dm-devel/2016-December/msg00122.html

> --
> dm-devel mailing list
> dm-devel at redhat.com
> https://www.redhat.com/mailman/listinfo/dm-devel