Linux

HAProxy - The Reliable, High Performance TCP/HTTP Load Balancer

http://haproxy.1wt.eu/10g.html

HAProxy - The Reliable, High Performance TCP/HTTP Load Balancer

http://haproxy.1wt.eu/10g.html HA Proxy [synthetic] benchmarks on 10Gbit traffic. Linux network stack is the bottle neck here, not HAProxy, i.e. you can 10G line rate on big frames and few connections.

OTN Discussion Forums : SQL*Plus 10.2.0.1.0 does not work on ... | times(NULL) = loop

http://forums.oracle.com/forums/thread.jspa?messageID=1108985 It appears to be an interesting bug in some versions of Oracle 10g, on Linux 2.6.x oracle process goes in loop doing times() system call if machine uptime < 199 days. Nice!!! / Oracle refs are bug 4612267 and 5867987 ) . The solution is to reboot.

Sören Bleikertz - On Amazon EC2's Underlying Architecture

http://openfoo.org/blog/amazon_ec2_underlying_architecture.html Some description of EC2 Internals. EC2s are XEN VMs, mine is currently using Xen 3.0.3-rc5-8.1.14.f , which appears to be F14 Xen package re-build on RHEl5.x (this is by looking at compiler version) . Some info in the article appears to a bit outdated

MySQL Benchmarks - MySQL 5.0.92 vs 5.1.55 vs 5.5.10 vs Percona 5.1.55 vs Percona 5.5.8 vs MariaDB 5.2.5 | vbtechsupport.com

http://vbtechsupport.com/606/ Sysbench-based benchmark comparing OLTP workloads for different builds and forks of MySQL on 64-core intel machine (Quad Intel Xeon L7555 ) . Only one definitive result is that MySQL cannot scale beyond 8 or 16 cores, or in some cases beyond just 2 cores (booo! ). In all cases performance went down when more than 24 cores were used .

A Tale of Four Kernels

http://www.spinellis.gr/pubs/conf/2008-ICSE-4kernel/html/Spi08b.html Quote from the article: “Therefore, the most we can read from the overall balance of marks is that open source development approaches do not produce software of markedly higher quality than proprietary software development.” A subjective code quality study for linux, windows, solaris and freebsd operating systems kernels

Configuring IPv6 on Redhat (CentOS) Linux — The IPv6 Experts .net

http://www.theipv6experts.net/2011/configuring-ipv6-redhat-centos-linux/ standard redhat-way (i.e. network-scripts) to configure IPv6 networking on RHEL/CentOS systems

[note about ipv6 stateful firewall in linux] ] 'Re: ip6tables icmp conntracking on 2.6.18 vs 2.6.24' - MARC

http://marc.info/?l=netfilter&m=120721841603406&w=2 explanation on why `-m state –state <>’ does not work for IPv6 in older kernels

XenDomUSupport - Xen Wiki

http://wiki.xensource.com/xenwiki/XenDomUSupport Guest Operating system support chat for XEN

PacketShader - GPU-accelerated Software Router

Also see http://shader.kaist.edu/packetshader/io_engine/index.html and http://www.ndsl.kaist.edu/~kyoungsoo/papers/2010-lanman-100Gbps.pdf Using latest x86 hardware and GPU to build a 100GB pc router / possible theoretically, but as of now, is not coming to an ISP near you/