Re: [Bacula-users] Performance with latent networks

On Thu, 2011-09-29 at 04:20 -0700, reaper wrote:

Hello.

I saw this post recently http://www.mail-archive.com/bacula-users AT lists.sourceforge DOT net/msg47393.html and it seems I'm affected by this problem too. Bacula shows extremely low performance in networks with high rtt. I have sd in Germany and client in USA. Bacula can make backups on speeds between 5 to 10 Mbit/s which is too slow as backups are up to 600 GB. With simple iperf test I can achieve transfer rates about 100-120 Mbit/s. Why bacula cannot do the same? Compression does not affect transfer speed. Client has plenty of free CPU/memory.

I've made ssh tunnel between hosts and set Address = 127.0.0.1 in Storage section. With this configuration I can see backups are running at speeds about 100 Mbit/s.

Bacula version is 5.0.2 from Debian Lenny backports.

hi reaper,

sounds like your sysctl.conf needs tweaking? have you tried something like this on both sides?

kernel.msgmnb = 65536
kernel.msgmax = 65536
kernel.shmmax = 68719476736
kernel.shmall = 4294967296

# long fat pipes
net.core.wmem_max = 8388608
net.core.rmem_max = 8388608

cheers

m

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