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-   -   rsync is slow (https://www.linuxquestions.org/questions/linux-newbie-8/rsync-is-slow-4175492391/)

jayadhanesh 01-24-2014 04:37 AM

rsync is slow
 
Hi,

I created two virtual machines on Xen and connected them through linux bridge, using brctl. I am trying to do rsync, file size: 188M between vms and this is slow of the
interface and bridge mtu is 4096 bytes. If I reduce the mtu to 1500, rsync for the same file happens in 5 mins. Why is a decrease in mtu increasing the transfer speed?

Thanks,
--D

druuna 01-24-2014 04:49 AM

Short answer: smaller packets will be transmitted faster, simply because of the throughput limitation of the line.

Here are the ins and outs: MTU, what difference does it make?


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