search for: 320mbit

...UDP stream from left to right with differen paket sizes. Throughput is measured by Spirent in highest Mbit flow without packet drops... Dom0 as gateway with no virtual instances and 256 packet size performes with 550Mbit. After starting three virtual instances with light load performance drops to 320Mbit! Even worser was the following installation with an virtual instance as gateway: Spirent -> eth0 <- dom0 -> vif1.0 <- domU -> vif1.1 <- dom0 ->eth1 <- Spirent eth0 and vif1.0 are bridged over xen-br0 eth1 and vif1.1 are bridged over xen-br1 Performance with 256 packet si...

...al Direct Attached Storage (DAS) units, connected to respective servers through Adaptec SCSI Controller. 1) Most of the time we used 80Mbit/s for external SCSI devices (in this case, the DAS itself). Is it true the maximum speed for external SCSI devices would be up to 80Mbit/s? Tried to change to 320Mbit/s but somehow the kernel crashed. Is there any specific reason why some (or all) external devices can only go up to 80Mbit/s? 2) We were thinking to use SAS or FC HBA for our next DAS but I'm not sure which brand/card does has the support in CentOS/Linux in terms of kernel module/driver,compat...