Hi everybody, I installed OpenAFS for Windows 1.572 on a Windows 7 Professional (64 bit) system with all system updates applied in conjunction with Kerberos for Windows (KfW) and the Network Identity Manager. I downloaded all packages from Secure Endpoints' web site. The PC is consists of current HW (Intel Core2Duo, 4 to 8 GB RAM, etc.).
Unfortunately, the maximum transfer speed on Windows is about 8-10 MB/sec when I copy local files to an OpenAFS volume. All involved network components are gigabit capable and I don't experience this problem when doing file transfers to a native ext3 filesystem using scp, for example. (I consider this comparable since the transfers are encrypted as well, in case of SSH/SCP even with a much stronger encryption algorithm). The server is a Debian Lenny system running OpenAFS 1.4.11 obtained from the Debian backports repository. The system is a QNAP TS-809 Pro with an external HD for the OS. The QNAP HDs are Seagate 7200k RPM drives of the Enterprise series used with SW RAID 5, totalling 6,4 TB in capacity. OpenAFS volumes reside on /vicep partitions which in turn reside on Logical Volumes (LVs). (We're only 25 users, so this scheme works perfectly well and has the advantage that the size of the underlying LV implicitly determines the quota, so I don't have to worry about setting OpenAFS quotas). The questions are thus: - Can I change the speed of the loopback adapter on Windows 7? If so, how? - Why does the loopback adapter's speed default to 10 Mb instead of the speed of the physical interface (Gb) at all? - What's a "normal" transfer speed for OpenAFS when run in gigabit network environemnts? (In case I forgot to mention something, please don't hesitate to ask). Thanks in advance! Kind regards & have a nice weekend, Holger
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