Infrastructure

<diagram goes here>

General purpose computing cluster (three nodes).

• Hardware: all machines are based on IBM x3750M4 and each has:

• • 4 sockets with 8-core CPU-s (Intel Xeon E5-4640), 32 cores per node.

  • 128GB of RAM (16 x 8GB), upradable to 1.5TB per node.

  • 4x Gigabit 10/100/1000 interfaces.

  • 2x 10Gbit SFP+ interfaces.

    • Redundant connections to two 10GbE switches.
    • VLAN-s for iSCSI, internal network and Internet connectivity

  • Integrated Lights out Managemnt (fully featured).

  • 6 free PCIe 3.0 x8 expansion slots (3 high-profile and 3 low-profile).

  • Next Business Day warranty coverage.

  • Integrated RAID controller ServeRAID M5110e SAS/SATA.

    • Only used for virtualization host OS installation with two SAS drives in RAID1 configuration.

  • 2 redundant high-efficiency power supply units and redundant cooling fans.

• Software: all machines are running CentOS 6 and provide KVM virtualization

SAN (Storage Area Network) system - IBM Storwize V3700.

• Fully redundant system with 48 3TB 7.2k SAS disk drives providing 125TB of RAID6 protected storage to the computing cluster.
• Multipath iSCSI connectivity to all computing nodes (no single point of failure).

Backup servers (3 in total).

• Two identical servers in Tartu, Estonia. In two separate University of Tartu datacenters.
• Hardware
  • 2 sockets with 6-core CPU-s (Intel Xeon E5-2609v3).
  • 64GB of RAM,  4x 16GB DDR4 RDIMM.
  • 2x GbE interfaces
  • 2x 10GbE SFP+ interfaces
    • End-to-end redundant 10GbE connectivity to the compute cluster.
  • RAID controller Supermicro AOC-S3108L-H8IR-O-P

  • Redundant power supply

  • 2x 120GB SATA3 SSD for system and cache.

• • 48 4TB SAS3 7,2k RPM hot-swap disk drives.

• Third similar server (24 8TB disks) in Tallinn, Estonia for geographic diversity (not in production yet)
• All servers use different RAID technologies and software versions to avoid a theoretical simultaneous software failure on all three machines.

Network switches.

• Two IBM RackSwitch G8124-R switches with 24 10GbE SFP+ slots each.
• Lights out Management network is provided separately over University of Tartu network.

Virtual machines.

• Main web server for sites with PHP and static content
• Second web server for Python / Plone based sites
• Central database server (PostgreSQL and MySQL)
• Metashare production server (https://metashare.ut.ee)
• Metashare testserver
• Docker host
  
  • ENTU repository, multiple containers/services (https://entu.keeleressursid.ee)
  • Reverse HTTP(S) proxy (Nginx)
  • www.cl.ut.ee web server
  • Keeleliin test/dev containers
  • Web analytics (Piwik)
• GDEF (Grand dictionnaire estonien-français - http://www.estfra.ee)
• GitLab code repository
• SSO Service Provider service
• KORP / KARP
• Corpus search
• Corpus computation/transformation
  
• Speech recognition server
• Server for Computational Linguistics student homework
• "Avatud keeletehnoloogia pilvetaristu struktureerimata avaandmete väärindamiseks" test- and development machines.
• "Applying Spatial Data in Linguistics" - test- and development server and public webserver (http://rurake.keeleressursid.ee)
• Estonian Wordnet test- and development server
• Internal services, environments for student assignments, development environments, etc.