[Gluster-devel] Spurious disconnections / connectivity loss

Stephan von Krawczynski skraw at ithnet.com
Mon Feb 1 09:02:02 UTC 2010

On Sun, 31 Jan 2010 13:37:49 +0000
Gordan Bobic <gordan at bobich.net> wrote:

> Stephan von Krawczynski wrote:
> > On Sun, 31 Jan 2010 00:29:55 +0000
> > Gordan Bobic <gordan at bobich.net> wrote:

> > Slightly offtopic I would like to ask if you, too, experienced glusterfs using
> > a lot more bandwith than a comparable nfs connection on the server network
> > side. It really looks a bit like a waste of resources to me...
> I haven't noticed bandwidth going "missing", if that's what you mean. I 
> do my replication server-side, so the server replicates the writes n-1 
> times for n servers, and my cacti graphs are broadly in line with the 
> bandwidth usage expected. If I disconnect all the mirrors except the 
> server I'm connecting to,the bandwidth usage between the client and the 
> server is similar to NFS.
> What bandwidth "leakage" are you observing?

My replication is done on client-side, because this is the only way to have it
redundantly access the data if one server goes down (in theory).
If I compare the bandwith used by glusterfs and the bandwith used by nfs for
the same client it is obvious that nfs uses far less bandwith than glusterfs
(comparing use of only one server of course). Interestingly incoming and
outgoing server traffic is merely the same, whereas nfs has far less incoming
traffic (server side), obviously because the client writes a lot less than it

> Gordan


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