Package: rsync Version: 2.6.8-2 Severity: normal
Hello, I am experiencing a performance problem rsync'ing from one machine to another in my LAN. The LAN is 100MBit/s Ethernet, idle, and the two machines are also mostly idle, with rsync + ssh together using less than 15% CPU on the slower machine, and some 3% on average on the faster (receiving) machine. The drives are U160 or U320 in the sender machine, and SATA in the other. Therefore, I expect the network to be saturated by the transfer. But in reality, I get a varying transfer rate between some 200KB/s and 7MB/s, with some 500KB/s on average (over hours, I'm trying to transfer some 50 gigs). When I transfer large, already compressed, files or ISOs, transfer is abysmally slow, and when I transfer lots of small files, performance soars. I have RSYNC_RSH=ssh on both ends, and transfer using rsync -av (note: not -u, not -z) in order to minimize CPU usage. But the drive lights also don't indicate much activity. What gives? And why is transfer over a WAN consistently fast enough to saturate my WAN link(s), ie, faster than in my LAN (but using different data)? Best, --Toni++ PS: Not tagging "minor" because of the impact this problem has for me. -- System Information: Debian Release: testing/unstable APT prefers unstable APT policy: (500, 'unstable'), (1, 'experimental') Architecture: i386 (i686) Shell: /bin/sh linked to /bin/bash Kernel: Linux 2.4.27-2-686-smp Locale: [EMAIL PROTECTED], [EMAIL PROTECTED] (charmap=ISO-8859-15) Versions of packages rsync depends on: ii libc6 2.3.6-7 GNU C Library: Shared libraries ii libpopt0 1.7-5 lib for parsing cmdline parameters rsync recommends no packages. -- no debconf information -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
