Hi What is the network's loss and delay characteristics between the two? i.e is it a LAN connect? is it WAN - we successfully replicate volumes of 2/3GB over 400k ADSL (while doing other things over the line) over a OpenVPN connection, what was important to us was to get the fragmentation under control so that packet loss at the transmission layer matched what AFS though was a packet - otherwise things really ground to a halt and transactions failed.
Unless the link between the two end points is close to perfect (in terms of loss and delay variance) I would be very careful in making RX packets span multiple UDP packets on the transmission medium, check MTU sizes carefully. Don't set your expectations at 3mbit/s AFS data transfer - there are headers to be accounted for - check what level of the protocol Iperf is really reporting at. Neil On 31 Jan 2012, at 19:24, muayad y wrote: > Hi, > I am trying to replicate RO volume 31GB on server, where upload speed > 6Mbit/s and download speed ~24Mbit/s on that server. However, replication is > taking so long ~ 1.3 Mbit/s. with Iperf over UDP can obtain up 3Mbit/s, when > using -bandwidth option. > > - I am wondering if there is similar option that I can pass to volserver ? > - read volserver docs and there is -udpsize option, the docs does not say > much, so I am not sure how to use it, or if I need to change linux kernel > params to make it work. > > Thanks for your help. > >
