Re: Latency and Rsync Transfers

2010-02-02 Thread Neal B
Hi Everyone, Thanks for your replies. The autotuning in the 2.6 kernel seems to be much better than manually setting the buffer sizes for the rsync client and server. Tuning the kernel allowed us to triple the speed. http://fasterdata.es.net/TCP-tuning/linux.html Neal On Mon, Feb 1, 2010 at

Re: Latency and Rsync Transfers

2010-02-01 Thread Jamie Lokier
Neal B wrote: >Thanks for your reply. I have been experimenting with the buffer >settings and when specifying it actually causes the transfers to go >slower. >I am running an rsync server using xinet.d and an rsync client. I >have tried specifying the sockopts on just the clie

Re: Latency and Rsync Transfers

2010-02-01 Thread Ryan Malayter
On Mon, Feb 1, 2010 at 12:14 PM, Christopher Hawkins wrote: > Hi fellas - > > as a part of my rsync command line on the client, I get almost 2x the > throughput on local gig ethernet. It was a huge improvment... I saw the same sorts of improvements... approximately 300% over a 45 Mbps pipe wit

Re: Latency and Rsync Transfers

2010-02-01 Thread Christopher Hawkins
Hi fellas - Just my 2 cents here. I experimented with this also a while back and with: socket options = SO_SNDBUF=65536,SO_RCVBUF=65536 in my rsyncd.conf on the server side, and: --sockopts=SO_SNDBUF=65536,SO_RCVBUF=65536 as a part of my rsync command line on the client, I get almost 2x the

Re: Latency and Rsync Transfers

2010-02-01 Thread Neal B
Hi Ryan, Thanks for your reply. I have been experimenting with the buffer settings and when specifying it actually causes the transfers to go slower. I am running an rsync server using xinet.d and an rsync client. I have tried specifying the sockopts on just the client, server, and both. Thank

Re: Latency and Rsync Transfers

2010-01-29 Thread Ryan Malayter
On Thu, Jan 28, 2010 at 10:43 AM, Neal B wrote: > Hello, > > Working a few servers that are transferring data across country with a 75ms > delay on a GIGE connection.  We can tune the tcp buffers on linux to improve > the connections using iperf.  Does rsync use the tcp buffers of the OS or > does

Latency and Rsync Transfers

2010-01-28 Thread Neal B
Hello, Working a few servers that are transferring data across country with a 75ms delay on a GIGE connection. We can tune the tcp buffers on linux to improve the connections using iperf. Does rsync use the tcp buffers of the OS or does it override these settings? Thanks, Neal -- Please use re