On Tue, 2015-01-20 at 17:41 +0100, Tomasz Napierala wrote:
>[...]
> How this was measured? VM to VM? Compute to compute?
iperf between compute/ceph-compute/ceph nodes.
> In any case, what is your deployment configuration, especially VLAND or GRE,
> networking gear, etc.
We have almost default setup from clean fuel 6.0, vlan based.
We are doing iperf based on 82599ES 10-Gigabit SFP+ interfaces (used in
our setup only for storage network) connected by fibre through Arista
7150.
Results on centos 6.5 deployed from fuel:
0.0-10.0 sec 3.09 GBytes 2.65 Gbits/sec
Results on centos 6.5 from official site:
0.0-10.0 sec 10.9 GBytes 9.38 Gbits/sec
In both cases tests were done with default tcp window size - 19.3KByte.
In both cases default mtu was with value 1500.
Commands used in test (after adding iperf tool from rpm):
on one node:
iperf -s -p 8777
on other node:
iperf -c ip_address_of_server_in_storage_network -p 8777 -t 10
(port 8777 is one of passed as ACCEPT in iptables setup from fuel)
Differences are in kernel (from centos or from mirantis), values
in /etc/sysctl.conf (plain or from mirantis) and probably in cgroups
settings.
Probably in ~30 minutes we also will have results on plain centos with
mirantis kernel, and on fuel deployed centos with plain centos kernel
(2.6.32 in both cases, but with different patchset subnumber).
--
Regards,
jell
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