Xen management : virsh commands
cloudibee You can use virsh to manage xen virtual servers. Here are some basic commands using virsh. To list all the xen virtual machines configured on the dom0 server : #…
September 2008
Linux : Tunable TCP /proc parameters
Tunable TCP settings can be found on /proc/sys/net/ipv4 . Here are the details of few of them.tcp_keepalive_probes : Number of KEEPALIVE probes tcp sends out, until the server decides that…
prelink: Improve your system performance.
prelink is a program which modifies ELF shared libraries and ELF dynamically linked binaries, so that the time which dynamic linker needs for their relocation at startup significantly decreases and…
sginfo : Disk information
sginfo command in Linux can be used to get information about the SCSI disks on the system. Display disk vendor, product code and firmware version : # sginfo /dev/sddDevice Type…
Performance : Throughput analysis using iozone.
The throughput of local filesystem or an nfs mount can be captured using iozone. The below command starts throughput calculation on /d1 filesystem , with 2 IO threads working on…