Interesting test results comparing and analyzing SSL performance. Using right combination of software and proper tunning, you can get up to 14000 TPS (re-shake every 80 requests) on HP DL 380 G7, with two Xeon L5630 (running at 2.13GHz for a total of…
Posted in benchmark, comparison, Linux, networking, nginx, openssl, performance, Security, ssl, STUD, stunnel, sysadmin, tls | Comments Off | permalink
Also see http://lists.kde.org/?l=kde-scm-interest&m=1276129572… Especially the attachment linked from that page.
Posted in development, git, gitolite, gitosis, infrastructure, KDE, reviewboard, sysadmin, tools | Comments Off | permalink
Also see http://lists.kde.org/?l=kde-scm-interest&m=1276129572… Especially the attachment linked from that page.
Posted in development, git, gitolite, gitosis, infrastructure, KDE, reviewboard, sysadmin, tools | Comments Off | permalink
Posted in configuration, for:@twitter, for:collidr, has:for, management, policy, site-config, sysadmin | Comments Off | permalink
All sysadmins: take a note: Wikipedia opened access to it’s site configuration management: a git repository with config files for various system software
Posted in configuration, management, policy, site-config, sysadmin | Comments Off | permalink
All sysadmins: take a note: Wikipedia opened access to it’s site configuration management: a git repository with config files for various system software
Posted in configuration, management, policy, site-config, sysadmin | Comments Off | permalink
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.
Posted in 10G, benchmark, haproxy, hardware, http, Linux, loadbalancing, performance, proxy, scalability, sysadmin | Comments Off | permalink
Posted in 10G, benchmark, haproxy, hardware, http, Linux, loadbalancing, performance, proxy, scalability, sysadmin | Comments Off | permalink
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.
Posted in 10G, 2.6, bugs, database, dba, Linux, oracle, sysadmin | Comments Off | permalink
Postmortem for the April-2011 EC2/EBS outage. It looks like a human errors plus unfortunate cascade of events lead to a requests storm that brought down EBS storage. Also, it appears that Amazon mis-estimated spare storage capacity needed for recov…
Posted in amazon, aws, cloud, cloudcomputing, ebs, ec2, outage, postmortem, sysadmin | Comments Off | permalink
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Konstantin Antselovich (c) 2004-2011
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