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From Venkata SwamyBabu Budumuru <venkataswamybabu.budum...@citrix.com>
Subject RE: qos_algorithm_params (MRW): kbps: 25600 for Guest VMs?
Date Wed, 12 Sep 2012 06:08:54 GMT
In case of VMware I see it setting to 200 Mbps for guest traffic but in case of Xen it is setting
to ~25 Mbps

uuid ( RO)                        : dbc7e0fc-1e2b-a331-788a-ded5aa2b7a6e
                     vm-uuid ( RO): 442056e0-0bff-5977-93fc-a986993cfe87
               vm-name-label ( RO): i-2-14-VM
          allowed-operations (SRO): attach
          current-operations (SRO):
                      device ( RO): 0
                         MAC ( RO): 02:00:7e:09:00:0c
           MAC-autogenerated ( RO): false
                         MTU ( RO): 1500
          currently-attached ( RO): true
          qos_algorithm_type ( RW): ratelimit
        qos_algorithm_params (MRW): kbps: 25600
    qos_supported_algorithms (SRO):
                other-config (MRW): nicira-iface-id: 49fda265-88b7-46d3-94bd-69ec50a3f2c5;
nicira-vm-id: 442056e0-0bff-5977-93fc-a986993cfe87
                network-uuid ( RO): 60179f2f-3835-6c83-af18-3d6bc6a50f7b
          network-name-label ( RO): VLAN-4fca9336-d655-bb55-5c4a-42f56350f194-707
                 io_read_kbs ( RO): <expensive field>
                io_write_kbs ( RO): <expensive field>
                locking-mode ( RW): network_default
                ipv4-allowed (SRW):
                ipv6-allowed (SRW):

Thanks,
SWAMY

From: Venkata SwamyBabu Budumuru
Sent: Wednesday, September 12, 2012 11:26 AM
To: cloudstack-users@incubator.apache.org
Subject: qos_algorithm_params (MRW): kbps: 25600 for Guest VMs?

Hi,

Any reason why we by default limit network rate to 25600 kbps (~25Mbps) on guest VMs? Which
parameter controls this setting? This is going to even control guest to guest traffic as well.
Why do we do this by default? It makes sense to rate limit public but, unsure about guest
traffic.

I see the following global params but they are meant to set this value to 200 Mbps

| Network  | DEFAULT  | management-server       | network.throttling.rate    | 200   | Default
data transfer rate in megabits per second allowed in network.                   |
| Network  | DEFAULT  | management-server       | vm.network.throttling.rate | 200   | Default
data transfer rate in megabits per second allowed in User vm's default network. |
+----------+----------+-------------------------+----------------------------+-------+-----------------------------------------------------------------------------------------+

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