[Openstack] [Swift] How to calculate rsync max connections

Mark Kirkwood mark.kirkwood at catalyst.net.nz
Tue Dec 13 23:11:01 UTC 2016


Any thoughts on this one guys?


On 06/12/16 09:56, Mark Kirkwood wrote:
> Hi,
>
> Is there a way to calculate rsync max connection (i.e based on number 
> of hosts, devices, object server workers etc)?
>
> Some context: we have recently gone live with Swift 2.7.0 cluster (2 
> regions, 6 hosts overall, each with 16 cores/32 threads and 4 drives). 
> We have rsync max connections to 25 (which I think is being set by 
> puppet-swift.., is the default value). We are seeing errors in the 
> rsync log: 'max connections (25) reached'. I'd like to be able to say 
> to the operations guys: set 'max connections to x, because <some rules 
> for calculating it>'.
>
>
> Cheers
>
>
> Mark
>
>
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