Purdue Campus Grid Preston Smith Condor Week 2006 April 24, 2006

Overview RCAC –Community Clusters Grids at Purdue –Campus –Regional NWICG –National OSG CMS Tier-2 NanoHUB Teragrid Future Work

Purdue’s RCAC Rosen Center for Advanced Computing –Division of Information Technology at Purdue (ITaP) –Wide variety of systems: shared memory and clusters 352 CPU IBM SP Five 24-processor Sun F6800s, Two 56-processor Sun E10ks Five Linux clusters

Linux clusters in RCAC Recycled clusters –Systems retired from student labs –Nearly 1000 nodes of single-CPU PIII, P4, and 2-CPU Athlon MP and EM64T Xeons for general use by Purdue researchers

Community Clusters Federate resources at a low level Separate researchers buy sets of nodes to federate into larger clusters –Enables larger clusters than a scientist could support on his own –Leverage central staff and infrastructure No need to sacrifice a grad student to be a sysadmin!

Community Clusters Hamlet  308 nodes dual Xeon (3.6 Tflops)  3.06 GHz to 3.2 GHz  2 GB and 4 GB RAM  GigE, Infiniband  5 owners (EAS, BIOx2, CMS, EE) Macbeth  126 nodes dual Opteron (~1 Tflops)  1.8 GHz  4-16GB RAM  Infiniband, GigE for IP traffic  7 owners (ME, Biology, HEP Theory) Lear  512 nodes dual Xeon 64 bit (6.4 Tflops)  3.2 GHz  4GB and 6 GB RAM  GigE  6 owners (EEx2, CMS, Provost, VPR, Teragrid)

Community Clusters Primarily scheduled with PBS –Contributing researchers are assigned a queue that can run as many “slots” as they have contributed. Condor co-schedules alongside PBS –When PBS is not running a job, a node is fair game for Condor! But Condor work is subject to preemption if PBS assigns work to the node.

Condor on Community Clusters All in all, Condor joins together 4 clusters (~2500 CPU) within RCAC.

Grids at Purdue - Campus Instructional computing group manages a 1300-node Windows Condor pool to support instruction. –Mostly used by computer graphics classes for rendering animations Maya, etc. –Work in progress to connect Windows pool with RCAC pools.

Grids at Purdue - Campus Condor pools around campus –Physics department: 100 nodes, flocked –Envision Center: 48 nodes, flocked Potential collaborations –Libraries: ~200 nodes on Windows terminals –Colleges of Engineering: 400 nodes in existing pool Or any department interested in sharing cycles!

Grids at Purdue - Regional Northwest Indiana Computational Grid –Purdue West Lafayette –Purdue Calumet –Notre Dame –Argonne Labs Condor pools available to NWICG today. Partnership with OSG?

Open Science Grid Purdue active in Open Science Grid –CMS Tier-2 Center –NanoHUB –OSG/Teragrid Interoperability Campus Condor pools accessible to OSG –Condor used for access to extra, non-dedicated cycles for CMS and is becoming the preferred interface for non-CMS VOs.

CMS Tier-2 - Condor –MC production from UW-HEP ran this spring on RCAC Condor pools. Processed 23% or so of entire production. High rates of preemption, but that’s expected! –2006 will see addition of dedicated Condor worker nodes to Tier-2, in addition to PBS clusters. Condor running on resilient dCache nodes.

NanoHUB Campus Grids Purdue, GLOW Grid Capability Computing Science Gateway Workspaces Research apps Virtual backends Virtual Cluster with VIOLIN VM Capacity Computing nanoHUB VO Middleware

Teragrid Teragrid Resource Provider Resources offered to Teragrid –Lear cluster –Condor pools –Data collections

Teragrid Two current projects active in Condor pools via Teragrid allocations –Database of Hypothetical Zeolite Structures –CDF Electroweak MC Simulation Condor-G Glide-in Great exercise in OSG/TG Interoperability –Identifying other potential users

Teragrid TeraDRE - Distributed Rendering on the Teragrid –Globus, Condor, and IBRIX FusionFS enables Purdue’s Teragrid site to serve as a render farm Maya and other renderers available

Grid Interoperability “Lear”

Grid Interoperability Tier-2 to Tier-2 connectivity via dedicated Teragrid WAN (UCSD->Purdue) Aggregating resources at low level makes interoperability easier! –OSG stack available to TG users and vice versa “Bouncer” Globus job forwarder

Future of Condor at Purdue Add resources –Continue growth around campus RCAC Other departments Add Condor capabilities to resources –Teragrid data portal adding on-demand processing with Condor now Federation –Aggregate Condor pools with other institutions?

Condor at Purdue Questions?

PBS/Condor Interaction PBS Prologue # Prevent new Condor jobs and push any existing ones off # /opt/condor/bin/condor_config_val -rset -startd \ PBSRunning=True > /dev/null /opt/condor/sbin/condor_reconfig -startd > /dev/null if ( condor_status -claimed -direct $(hostname) 2>/dev/null \ | grep -q Machines ) then condor_vacate > /dev/null sleep 5 fi

PBS/Condor Interaction PBS Epilogue /opt/condor/bin/condor_config_val -rset -startd \ PBSRunning=False > /dev/null /opt/condor/sbin/condor_reconfig -startd > /dev/null Condor START Expression in condor_config.local PBSRunning = False # Only start jobs if PBS is not currently running a job PURDUE_RCAC_START_NOPBS = ( $(PBSRunning) == False ) START = $(START) && $(PURDUE_RCAC_START_NOPBS)