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
This blog is available on IPv6 as of today
Posted in 6in4, blog, ipv6, network, sysadmin, tunnel, update, wordpress | No Comments » | permalink
standard redhat-way (i.e. network-scripts) to configure IPv6 networking on RHEL/CentOS systems
Posted in centos, ipv6, Linux, network, rhel, sysadmin | Comments Off | permalink
Guest Operating system support chat for XEN
Posted in Linux, sysadmin, virtualization, xen | Comments Off | permalink
a series of articles on TechNet describing and documenting hotmail migration to windows 2000/IIS 5.0/IISAPI from FreeBSD/Apache/CGI
Posted in apache, freebsd, hotmail, iis, Microsoft, sysadmin, windows | Comments Off | permalink
Notes from Hotmail team about conversion of hostmail apache/bsd -based webfarm to windows 2000. (they have converted CGI to ISAPI filters running on IIS 5.x )
Posted in convert, freebsd, Microsoft, scalability, sysadmin, unix, windows, windows2000 | Comments Off | permalink
sendnder-score IP lookup tool
Posted in mail, Postmaster, spam, sysadmin | Comments Off | permalink
You are currently browsing the archives for the sysadmin category.
Konstantin Antselovich (c) 2004-2011
powered by WordPress
Entries (RSS)
and Comments (RSS).