4 Broadcom NetXtreme BCM5720C GbE NICs builtin to motherboard (only one in use)
2 dual-port Intel X520 PRO/10GbE PCI-Express NICs
250GB 7200 rpm SATA disk, 6 x 600GB 10000 rpm SAS disks
The experiment backplane consists of four 10Gb interfaces connected to
an Arista 7504
Important: The interfaces in the d820 nodes are not capable of
operating at speeds lower than 10Gb, so make sure to request link speeds of
"10Gb" or "*" in your NS file.
Images and Kernel Support
Currently, the following Emulab standard images are supported on these
Ubuntu: 64-bit: UBUNTU14-64-STD, UBUNTU16-64-STD
CentOS: 64-bit: CENTOS7-64-STD
FreeBSD: 64-bit: FBSD103-64-STD, FBSD111-64-STD
Xen 4.6 with Ubuntu 16 "dom0": 64-bit: XEN46-64-STD
Many of the other standard Emulab images will likely work as well, though
older FreeBSD and Fedora images will not work.
No support for 32-bit OS images. No technical reason here, just low
priority. 32-bit OSes would allow access to only 4GB of the 128GB of
RAM, so there is no good reason to use them.
Limited configuration of local storage. Each of the nodes has six
600GB hard drives in addition to the 250GB system disk. While these
drives are connected to a hardware RAID controller, we have them
configured as "non-RAID" in the BIOS for the time being. You will need
to use a software RAID solution (e.g., LVM or ZFS) if you want very
large or very fast local storage. We suggest you look at Emulab
Blockstores as a
way of configuring the extra disk space.