https://systembash.com Technology and System Administration Thu, 25 Jun 2020 17:19:47 +0000 en hourly 1 https://wordpress.org/?v=6.3.1 https://systembash.com/wp-content/uploads/2023/08/cropped-icon-dark-bg-32x32.png https://systembash.com 32 32 https://systembash.com/fixing-ip_conntrack-bottlenecks-the-tale-of-the-dns-server-with-many-tiny-connections/ https://systembash.com/fixing-ip_conntrack-bottlenecks-the-tale-of-the-dns-server-with-many-tiny-connections/#comments Fri, 22 Oct 2010 21:06:23 +0000 http://systembash.com/?p=822 PowerDNS, which has been great. It is a DNS server whose backend is SQL, making administration of large numbers of records very easy. It is also fast, easy to use, open source and did I mention it is free? The server has been humming along for years now. The traffic graphs don't show a lot of data moving through it because it only serves DNS requests (plus MySQL replication) in the form of tiny UDP packets. Read on to follow my story of how I fixed this tricky problem. No kittens were harmed in the writing of this post. ]]> https://systembash.com/fixing-ip_conntrack-bottlenecks-the-tale-of-the-dns-server-with-many-tiny-connections/feed/ 1 https://systembash.com/tweaking-tcp-for-fast-100mbps-connections-and-transfers-on-linux/ https://systembash.com/tweaking-tcp-for-fast-100mbps-connections-and-transfers-on-linux/#comments Thu, 24 Dec 2009 01:26:24 +0000 http://systembash.com/?p=516 https://systembash.com/tweaking-tcp-for-fast-100mbps-connections-and-transfers-on-linux/feed/ 5 https://systembash.com/a-simple-java-udp-server-and-udp-client/ https://systembash.com/a-simple-java-udp-server-and-udp-client/#comments Wed, 17 Sep 2008 10:58:29 +0000 http://systembash.com/?p=236 https://systembash.com/a-simple-java-udp-server-and-udp-client/feed/ 44