On Thu, Feb 12, 2009 at 6:03 PM, (private) HKS <hks.priv...@gmail.com> wrote: > On Tue, Feb 10, 2009 at 3:56 PM, (private) HKS <hks.priv...@gmail.com> wrote: >> On Tue, Feb 10, 2009 at 1:04 PM, Steve Polyack <kor...@comcast.net> wrote: >>> (private) HKS wrote: >>>> >>>> My server's network performance seems all right. Testing basic TCP >>>> throughput with iperf, I'm showing an average of 880Mbps or so. FTP >>>> downloads to this server hum along at about 85MB/s. >>>> >>>> >>> >>> You may want to expirement with the "Maximum Network Buffer Size" parameter >>> which is available in both the file-daemon and storage-daemon configuration >>> files. As far as the documentation explains, the SD's default is 32768 bytes >>> while the FD default is 65536 bytes. I'm not sure what the reason is for >>> the difference, but I would try setting them both to either 32768 or 65536. >>> Perhaps try larger values, but stay under the limits of your OS's TCP >>> send/recv buffers (256k s/r on FreeBSD 7). >>> >> >> Thanks for the recommendation. I've changed this around a bit, but >> haven't seen any change. I also haven't been able to replicate this >> poor performance through any other method of writing to disk, >> transferring across the network, or some combination of the two. I'm >> certainly open to doing tests on this if only I knew what to do. >> >> -HKS >> > > > I have discovered (what appears to be) a bug in OpenBSD's bnx(4) > driver that limits tx performance. > > I don't *think* it's related to this problem: rx traffic performs > beautifully and the threshold (109Mb/s) is far above what I'm getting > with Bacula. I mention it in the interest of full disclosure. > > -HKS >
I rebuilt one of my servers on FreeBSD 7.1 which is unaffected by this bug and the performance issue persists. This pretty much eliminates the OS as a problem here, so I guess we're looking at a hardware oddity, some tuning knobs that need adjustment, or some combination of the two. -HKS ------------------------------------------------------------------------------ Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, CA -OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise -Strategies to boost innovation and cut costs with open source participation -Receive a $600 discount off the registration fee with the source code: SFAD http://p.sf.net/sfu/XcvMzF8H _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
