A highly reliable data center network topology Tier 1 at JINR

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Presentation transcript:

A highly reliable data center network topology Tier 1 at JINR A.S. Baginyan Senior Engineer, CCNP Scientific Supervisor: V.V. Korenkov, DSc Joint Institute for Nuclear Research Dubna, 2014

Worldwide LHC Computing Grid TIER 0 accepts RAW data from the CMS Online Data Acquisition and Trigger System. repacks the RAW data received into primary datasets based on trigger information . distributes RAW data sets among the next tier stage resources (Tier-1) so that two copies of every piece of RAW data is saved, one at CERN, another at a Tier-1. TIER 1 receives a subset of the data from the T0 related to the size of the pledged resources in the WLCG provides tape archive of part of the RAW data (secure second copy) which it receives as a subset of the datasets from the T0 provides substantial CPU power for scheduled: re-reconstruction skimming calibration AOD extraction TIER 2 services for local communities grid-based analysis for the whole experiment (Tier-2 resources available to whole experiment through the grid) Monte Carlo simulation for the whole experiment

Network topologies Mesh topology Star topology Full mesh topology

Spanning Tree Protocol (STP) Real-life example of «spanning tree protocol» calculation

Dijkstra’s algorithm

Transparent Interconnection of Lots of Links (TRILL) TRILL Layer 2 multiple paths STP Layer 2 single paths

Shortest Path Bridging (SPB)

Shortest Path Bridging Transparent Interconnection of Lots of Links Compare and Contrast Shortest Path Bridging and Transparent Interconnection of Lots of Links Characteristic Shortest Path Bridging Transparent Interconnection of Lots of Links Multi-Pathing Support Yes Eliminates Need for Spanning Tree and Blocked Links Interoperability with Spanning Tree Loop Prevention RPFC TTL-based & RPFC Uses IS-IS as the Layer 2 Routing Protocol IS-IS Interoperability Uses existing IS-IS with TLV extensions New type of IS-IS instance with new PDU types Dynamically Changes Network Paths for Traffic Flows Cut-through Switching Possible Possible but difficult due to options field in header Virtualization Support Service Instance using I-SID (16Mio) VLAN only (4k) Low-Touch Configuration Yes; need to configure VLAN to Service Instance Mapping

TIER 1 JINR

Thank you for your attention

A highly reliable data center network topology Tier 1 at JINR A.S. Baginyan Senior Engineer, CCNP Scientific Supervisor: V.V. Korenkov, DSc Joint Institute for Nuclear Research Dubna, 2014