Servers

The imaging group has four active servers and one legacy server.

The active servers are Odin, Elli, Loki and pmac275. Odin and Elli are our two PACS servers. They operate in tandem. Scans from the scanner console go to both machines. pmac2752 hosts DCMDB, the automatic preprocessing service and a partial PACS backup. Loki provides login, MATLAB licences and home directories for the image analysis lab.

Odin is nearing end-of-life and will be taken off-line or upgraded by the end of 2016.

Wicnserv has a PACS with copy of the oldest scans. These DICOM data are available from pmac2752. Wicenserv is off-line but can be restarted if needed.

Elli
Elli has a 2.2GHz hex-core Intel Xeon "Ivy Brige" CPU and 32GB of high speed RAM. Online storage hardware is 3 3TB nearline SAS and two 600GB SAS disk drives all connected to a hardware RAID controller. One 600GB drive holds the operating system and applications. The other 600GB drive is a backup for that boot drive. The three 3TB drives are connected as a RAID 5 array that contains the PACS data. A 3TB external drive provides off-line backup. Elli has five high speed network connections with three in use. One connection is to the university internet. A second connects Elli to the scanner private network. A third is used for only for hardware monitoring. The other two are spares. Elli runs Ubuntu 16.04 (Xenial Xerus) LTS. This is an April 2016 release, with long term support through 2019. The PACS server software is DCM4CHEE 2.17.1 running on top of JBOSS 4.2 and mysql 14.14 distribution 5.7.12 for Linux.

Odin
Odin has two 2.4GHz quad-core Intel Xeon "Westemere" CPUs and 16GB of RAM. The Four 2TB disk drives inside Odin are connected to an Apple RAID card. The four drives form a RAID 5 set of 5.23TB. The RAID set is divided into 2 volumes. One volume is 650GB and the other is 4.53TB. The 650GB volume contains 3 partitions. The boot volume, Odin, is 550GB. The Scratch partition is 85GB. A bootable image of the OS X Server install DVD is on the third partition. This partition contains utilities and can be used to repair the boot partition. The 4.53GB volume contains a single partition, Freyja. This partition contains the PACS. Odin has four network connections. Two are internal and two are on expansion cards. Odin is connected to university internet, the Scanner's private network and has a direct connection to a Netgear ReadyNAS Pro. The ReadyNAS Pro contains 5TB of storage used for TimeMachine backups of Odin.

pmac2752
pmac2752 is a MacPro(Early 2008) repurposed as a server. From the outside it looks identical to Odin. Inside, pmac2752 has two 2.8GHz Intel Xeon E5462 (Penryn) CPUs and 6GB of RAM. There four SATA disk drives in pmac2752 connect to the motherboard disk controller. There is no hardware RAID card. Drive Bay 1 contains a 500GB Western Digital Caviar Black disk. This high speed desktop class drive is under warranty until August 2019. Drive bays 2,3 and 4 contain 4TB Western Digital Se server class bulk storage drives. Drive Bay 1 is /dev/sda and contains the boot, rood and swap partitions. Drive bays 2,3 and 4 are /dev/sdb, /sdc and /sdd. Under mdadm they form the software RAID 5 array /dev/md0. pmac2752 has two network ports. eth0 connects to the university network on the .95 subnet. eth1 is not connected but could be connected to the scanner private network. This would allow pmac2752 to receive DICOM directly from the scanner console in an emergency. One port in the server room is on the scanner private network.

Loki
Loki is a Mac mini Server(Late 2012). Loki has a 2.6GHz Intel Core i7 CPU and 16GB or RAM. The two 1TB internal disks are arranged as separate disks. Server HD is the root drive. Sigyn contains the home directories for the student lab. Loki has a single ethernet port connected to the university network on the .95 subnet.

Wicnserv
Wicnserv has two 2GHz dual-core Intel Xeon CPUs and 10GB of RAM. The three 80GB disk drives in Wicnserv are configured as a redundant boot drive. Wicnserv has two ethernet ports. One is connected to the university Internet and the other is connected to the Scanner's private network. An XServe Raid provides 4TB of storage for the legacy PACS and 1.4TB once used for the lab computers 'Home' directories.

November 2016 Wicnserv failed to boot. We have not diagnosed the problem.