roger wrote:
I believe this is the second time I've encountered this issue within the past 6 mos or more. While performing some read/write tests between a NFS client and server, I noticed speed was severely hindered on my 100mbits network with tests of writing a ~17MB file taking ~15 minutes, of which, should only take ~8-10 seconds.
Is this with NFS over UDP or over TCP?
After restarting Shorewall (firewall), speeds immediately returned to normal. Steps I took to restart the server were "/etc/init.d/shorewall stop &&shorewall clear && /etc/init.d/shorewall start". (I was trying to see if the configuration files were directly hindering performance. Upon restarting shorewall, no further speed issues were noted.) This leads me to believe, Shorewall is borking someplace -- or more correctly put, one of the kernel modules concerning Netfilter is failing??
Given that Shorewall isn't something that runs continuously in your system, it's hard to imagine that this problem is Shorewall-related.
(Since this issue is extremely rare, it's probably next to impossible to debug, except on past experience from others.) Some bleak possibilities might include the use of Suspend to Disk (ie. TuxOnIce) and kexec (kernel reload). Here's the requested debug info for this case scenario:
Better problem documentation would include: a) Output of "shorewall dump" at the time that the problem was encountered.b) Output of "shorewall dump" after recovery measures were taken and performance restored.
-Tom -- Tom Eastep \ Nothing is foolproof to a sufficiently talented fool Shoreline, \ http://shorewall.net Washington USA \ [EMAIL PROTECTED] PGP Public Key \ https://lists.shorewall.net/teastep.pgp.key
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