Re: Throughput increase by LACP bonding

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On Tue, Jul 03, 2012 at 10:07:16AM +0200, Wido den Hollander wrote:
> 
> 
> On 03-07-12 09:42, Madhusudhana U wrote:
> >Hi all,
> >I am trying to increase the throughput in the cluster by enabling
> >LACP on both in clients and all ceph cluster nodes. Each client and
> >ceph nodes has two 1G Ethernet interface which I want to aggregate
> >and make it 2G. LACP has been configured at switch side too. But even after
> >the configuration, I am not seeing any through put increase in ceph tell osd
> >bench command and also dd. They are taking the same amount as earlier. I am
> >constantly seeing around 100MB/sec throughput in both DD and ceph bench
> >commands. Can someone suggest me how i can increase the throughput of the
> >cluster ? Below are my configurations.
> 
> Can you verify if both NIC's are actually doing something? Use
> bwm-ng for example?
> 
> Wido
> 
I would imagine they aren't, as the output hash function for 802.3ad trunking is
based on source and destination address, so if your test just writes from a
single client to a single OSD, it will just use one link.
Neil

> >
> >	No of OSD's 	: 5
> >	No of MON's 	: 3
> >	No of MDS's	: 2
> >	Linux Kernel	: 3.4.4
> >	Ceph version	: 0.47.3
> >         Hard disks      : 2x160G SAS drives (raid 0 configuration)
> >         CPU             : Intel(R) Xeon(R) Quad CPU E5506  @ 2.13GHz
> >         Memory          : 6G
> >
> >Thanks
> >__M
> >
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