Archive for the 'Linux' Category
OTN Discussion Forums : SQL*Plus 10.2.0.1.0 does not work on … | times(NULL) = loop
Friday, May 6th, 2011It 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
Friday, April 29th, 2011Some 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 o…
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
Saturday, April 23rd, 2011Sysbench-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 cor…
A Tale of Four Kernels
Tuesday, April 5th, 2011Quote 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 …
Configuring IPv6 on Redhat (CentOS) Linux — The IPv6 Experts .net
Wednesday, March 30th, 2011standard 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
Wednesday, March 30th, 2011explanation on why `-m state –state ‘ does not work for IPv6 in older kernels
XenDomUSupport – Xen Wiki
Saturday, March 26th, 2011Guest Operating system support chat for XEN
PacketShader – GPU-accelerated Software Router
Friday, March 25th, 2011Also 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 co…
Diving into the Linux Networking Stack, Part I | Beyond Syntax | Michael J. Schultz
Friday, March 18th, 2011Overview of how network driver work in linux kernel