[dm-devel] raid1 round-robin scheduler

[Zdenek Kabelac]

Dne 5.12.2014 v 14:02 Bryn M. Reeves napsal(a):
> On Fri, Dec 05, 2014 at 04:38:56PM +0400, Vasiliy Tolstov wrote:
>> 2014-12-05 15:25 GMT+03:00 Vasiliy Tolstov <v.tolstov at selfip.ru>:
>>> Hello. Does the somebody create scheduler for raid1 to add ability to
>>> read data from all devices, for example i need to read from all
>>> devices when have sequential read.
>>
>>
>> I found patches in 2012 from Robert Collins, [dm-devel] Load balancing
>> reads on dmraid1 (and 01) arrays
>> why it not merged , does dm devel devs have plans to round-robin raid1
>> reading operations ?
>
> iirc the patches showed no measurable performance gain.
>


Are we talking here about rather deprecated old  dm mirror usage,
or a new raid1  (mdraid) ?

I assume new   dm-raid  target is using everthing what md raid provides.

Zdenek