[ofa-general] QoS RFC

[Yevgeny Kliteynik]

Sean Hefty wrote:
>> This file has *all* the possible keywords.
>> The administrator really doesn't have to use them all.
>> For instance, there are three different ways to define port groups:
>>  - by guid list
>>  - by node type
>>  - by port names
>> You could stick with the guids only - this gives you all the 
>> functionality
>> you need, but by doing so you loose some flexibility.
> 
> Beyond referring to port GUIDs, I'm also referring to items like:
> 
> sl: 0
> mtu-limit: 1
> rate-limit: 1
> packet-life: 12
> path-bits: 2,4,8-32
> 
> vlarb-high: 0:255,1:127,2:63,3:31,4:15,5:7,6:3,7:1
> vlarb-low: 8:255,9:127,10:63,11:31,12:15,13:7,14:3
> vl-high-limit: 10
> 
> sl2vl-table: 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,7
> sl2vl-table: 0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0
> 
> sl: 0
> mtu-limit: 1
> rate-limit: 1
> packet-life: 12
> path-bits: 2,4,8-32
> 
> This is really low level data, akin to the administrator manually 
> programming the switch tables.  My take is that we should drop tons of 
> this flexibility in favor of something much simpler for the administrator.

But again, the administrator doesn't *have* to use all these.
He can simply define sl2vl-tables, and then match service-id
(in qos-match-rules) to a certain sl (in qos-levels).
That's it.
No MTU, rate, packet lifetime or any other low level data.
Does the following file look better?

     port-groups
         port-group
             name: Part1
             port-guid: 0x1000000000000001
             port-guid: 0x1000000000000002
         end-port-group

         port-group
             name: Part2
             port-guid: 0x1000000000000005
             port-guid: 0x1000000000000006
         end-port-group
     end-port-groups

     qos-setup
         sl2vl-tables
             sl2vl-scope
                 group: Part1
                 from: *
                 to: *
                 sl2vl-table: 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,7
             end-sl2vl-scope
             sl2vl-scope
                 group: Part2
                 from: *
                 to: *
                 sl2vl-table: 0,1,2,3,4,5,6,7,8,0,1,2,3,4,0
             end-sl2vl-scope
         end-sl2vl-tables
     end-qos-setup

     qos-levels
         qos-level
             sl: 2
         end-qos-level
         qos-level
             sl: 5
         end-qos-level
     end-qos-levels

     qos-match-rules
         qos-match-rule
             service-id: 4001-5000
             qos-level-sn: 1
         end-qos-match-rule
         qos-match-rule
             service-id: 5001-6000
             qos-level-sn: 2
         end-qos-match-rule
     end-qos-match-rules

-- Yevgeny


> - Sean
>