Full Text Search benchmark, Oracle vs Postgres, on 2x Quad core Xeon, 8G RAM, 2 SSDs x RAID 1. Pg is being slightly faster when query contains several words, once word count increases, oracle leaps ahead (suggesting a more mature FTS implementation)
Posted in benchmark, comparison, database, dba, Linux, oracle, performance, postgresql, search | Comments Off | permalink
Netfilter: Making large iptables rulesets scale
Posted in iptables, kernel, Linux, network, performance, sysadmin | Comments Off | permalink
A way to detect BT protocol traffic — instead of looking at every packet, traffic to torrent tracker websites is redirected (via divert(4) ) and then analyzed. Analyzer script (PERL) produces the src_ip, dst_ip, dst_port triplet, this info can be us…
Posted in bittorrent, development, divert, Linux, network, performance, Perl, programming, system | Comments Off | permalink
CPU Identifications in linux kernels (2.6.18 + rhel patches) , NOTE that this is not applicable when you are running linux kernel on top of virtual hardware (i.e. Dom0 and DomU kernels won’t show proper CPU info because they use “virtual CPU” as set …
Posted in cpu, cpuid, for:collidr, hardware, Linux, redhat, x86 | Comments Off | permalink
right now ppl are using linux bridges as virtual switches for XEN/KVM VMs. Open vSwitch is an improvement over linux bridge that supports industry standard protocol and features and IOS-like CLI — [when project matures] ]you should be able trunk yo…
Posted in for:collidr, kvm, Linux, network, networking, opensource, switch, system, virtualization, xen | Comments Off | permalink
Series of short articles on linux kernel [2.6.27] APIs by Tim Jones
Posted in api, c, kernel, Linux, programming, reference | Comments Off | permalink
[short] reference for linux boot process
Posted in boot, bootloader, kernel, Linux, mbr, reference, sysadmin, system | Comments Off | permalink
a lot of interesting details about using flash drives as cache and high-perf block io devices (notes from google talk given at UCSD)
Posted in architecture, cache, cs, disk, flah, hardware, high_load, Linux, performance, storage | Comments Off | permalink
Excellent article explaining linux audio stack, describing which component does what and why
Posted in article, audio, for:collidr, Linux, technology | Comments Off | permalink
details about important linux kernel networking subsystem data structure called “skb”
Posted in c, development, kernel, Linux, network, networking, programming, skb, skbuff, sk_buff, socket, tutorial | Comments Off | permalink
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Konstantin Antselovich (c) 2004-2011
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