Just a few remarks on performance: ( All imho ) 1) Do not use any kind of asynchronies write. In case of a serious problem your data might not contains what you expecting. 2) If possible use Jumbo frames. To handle 100K interrupts (1500 bytes ) or 10k (9000 bytes) interrupts on a 1GbE links makes for a CPU and network adapter quite a difference 3) Sine any data goes down to disk - the disk subsystem will determine your overall speed. Use SDD for IOPS intensive application.*
* a) 4 x 2TB SATA disk can handle about 4 * 100 IOPS which makes 400 IOPS. In case of 4 K writes your total reachable write speed would be 1.6 MB/s. Now think what happen if a VM starts swapping. b) Slow disk systems can not be made faster on higher software stacks except in case where you do not care about your data ( async writes for example ) @ Michael ( xtremFS ) AFAIK uses GPFS VirtFS (v9fs). Maybe its an option for xtremFS as well. I found on scribd (sic) http://www.scribd.com/darkcompanion/d/54839002-xVI05-Open-Source-Virtualization-With-KVM some information about GPFS /KVM and VIRTIO. Maybe usefull for you as well. Have a nice weekend Hajo _______________________________________________ Users mailing list Users@lists.opennebula.org http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
