I am attempting to index a large amount of data from a website and the last thing I want to do is DoS it accidentally. To prevent this, I was planning on doing it at night since it is not an international website. But if they throttle server performance when not used, this would be … Read more
I was wondering if anybody has any solutions for throttling bandwidth on an Xserve (running Apache 2); I’m trying to use mod_bw (http://ivn.cl/category/apache/#bandwidth), but have been running into problems. I can build the right module using apxs, but I run into problems when I try to restart Apache (it says that mod_bw.so is compiled for … Read more
We have a set of WCF services that are proxying calls to another web service layer built on top of IBM WebSphere. The WebSphere setup is a black box to us, but we’re told that we need to throttle calls to the back-end due to its poor performance and scalability. They also need us to … Read more
I need to use OHS 12C ( apache 2.2) for throttling purpose.I’m using OHS as proxy and forwarding request to weblogic server. The requirement is to limit the concurrent connection to weblogic server to 512 and if OHS get more than 512 request then put those requests in backlog queue. Once the app server is … Read more
I need to send couple of thousand emails at once, all addresses are existing users of one domain. I was wondering if that would not cause receiving server to cry ‘Spam!’ at the sight of so many emails. I was wondering if there would be a way to mitigate such risk – like say sending … Read more
I am running a quake 3 engine based game server (Wolfenstein: Enemy Territory) on Ubuntu 16.04 and I’ve ran into a fairly puzzling issue. A week ago players started having issues when connecting to the server. Basically the server tries to send a snapshot of the game state on client connect but this fails hundreds … Read more
I am going to deploy a website with several big media files (~10 GiB) and I would like to balance the load on it. NGINX will be used to serve the files. What I would like to achieve is something that has already been discussed here, but no real answer has been received. These two … Read more
I’m doing some throughput testing on some radio units that have narrow channel bandwidth settings (for example sub 250KHz bandwidth). During my testing of iperf3, I noticed that the slowest speed it would ever transfer at despite setting a bandwidth limit on the command-line for iperf3 was 655 KB/sec (even if the command-line argument was … Read more
Instructions I followed: https://www.kernel.org/doc/html/latest/admin-guide/cgroup-v1/blkio-controller.html Script I ran: BYTES_PER_SEC=1048576; MAJOR=259 MINOR=1 echo “device name:” udevadm info -rq name /sys/dev/block/$MAJOR:$MINOR echo “” echo “device numbers:” echo $MAJOR:$MINOR; echo “” sudo mount -t cgroup -o blkio none /sys/fs/cgroup/blkio; sudo echo “COMMAND TO BE EXECUTED:”; sudo echo “$MAJOR:$MINOR $BYTES_PER_SEC”; sudo echo “$MAJOR:$MINOR $BYTES_PER_SEC” > /sys/fs/cgroup/blkio/blkio.throttle.read_bps_device sudo echo “$MAJOR:$MINOR $BYTES_PER_SEC” … Read more
We are having issues with users using proxy servers and causing trouble on our website. Is there an updated SQL list of proxy servers, indexed by IP, available anywhere so that we can query it and prevent access to those using proxy servers? Answer You could look for the X-Forwarded-For HTTP header but of course … Read more
