httperf on Linux

Monday, 16. 04. 2012  –  Category: stash, sw

“httperf is a tool for measuring web server performance. It provides a flexible facility for generating various HTTP workloads and for measuring server performance.” Set open files to 65535 via ulimit -n Recompile httperf with /usr/include/bits/typesizes.h’s __FD_SETSIZE dialled up to 655351 Twiddle the TCP stack for faster socket recycling23 : echo 1 > /proc/sys/net/ipv4/tcp_tw_recycle echo […]

Moving disks from Xen to KVM

Sunday, 8. 04. 2012  –  Category: stash

Overview Moving virtual machines from Xen to KVM The storage for both is under LVM Under Xen the storage for each VM isn’t partitioned as a disk, it’s just a filesystem. GRUB under KVM will need to see a boot sector and a partition table. Under Xen the storage for each VM doesn’t contain a […]

iLO port forwards

Wednesday, 5. 08. 2009  –  Category: stash

(woah, neglected blog) HPaq’s iLO is a strange beast, its functionality seems split between the SSH CLI and the web interface. Depending on your particular mission, some goals are only achievable using the whole ActiveX / Java remote console in IE. Sigh. To get this flying from virtualised VMware, here’s the full SSH mutter to […]