© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 1© 2010 Cisco and/or its affiliates. All right...
© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 2• Must start with the varying demands on the ...
© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 3• Before we go any further, what is architect...
© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 4I’ve architected my SAN for end to end perfor...
© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 5Data-center Director Class switch designed to...
© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 6Crossbar Fabric ModulesN+1 Redundant2/4/8/10/...
© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 7• Uses centralized arbitration to send traffi...
© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 8• End-to-end fabric construction is one aspec...
© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 9• Twitter: @ciscoDC• Facebook.com/CiscoDC• Vi...
© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 10© 2010 Cisco and/or its affiliates. All righ...
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Non stop operations of mds

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Non stop operations of mds

  1. 1. © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 1© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 1Non-Stop Operations of MDS inReal World ApplicationsCarl RadomCo-Sponsoredby Intel®
  2. 2. © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 2• Must start with the varying demands on the SCSI protocol – DB servers (low latency, high throughput), single applicationservers (low speed, low throughput)• SAN designs traditionally robust: dual fabrics, data loss is not tolerated• Must manage ratiosFan in/out, ISL oversubscription, virtualized storage IO streams (NPIV attached devices, server RDM, LPARs, etc.), queue depth• LatencyFabric initiator to targetWhat if something goes wrong: slow drain?Performance under load: does my fabric perform the same?• Is my fabric application independent?Consistent fabric performance regardless of changes to SCSI profile• Number of frames• Frame size• Speed or throughputBut how do I manage all of this?
  3. 3. © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 3• Before we go any further, what is architecture?• Architecture is a highly subjective term, but;• It must be all inclusive, i.e. every part of the network• Must meet requirements today and in the future (RTO/RPO, SLA, MTBF, scale, etc.)• Operational considerations; can I manage what I deploy• Regarding storage, it must be consistent in performanceCourtesy of Google.comNow that we got that out of the way……
  4. 4. © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 4I’ve architected my SAN for end to end performance• There are “any-to-any connections”• There are enough ISLs to support inter-switch traffic• There are line rate ports• There are dual fabricsWhy then do I have performance issues when;• My application changes (i.e. Notes to Exchangemigration)• Virtualized server clusters generate “denser” trafficloads• I mix slow speeds with high speeds• Misbehaving devices cause congestion on myfabricsAnswer: need a deeper look at the director itself
  5. 5. © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 5Data-center Director Class switch designed to deliver high-availability, system scale, usability, HighDensity 16G FC. ChassisSupervisor EngineFabricModule48 Port 16G ModuleAvailable N+1 FabricProtectionFan Tray48 Port 10GbE FCoE Module
  6. 6. © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 6Crossbar Fabric ModulesN+1 Redundant2/4/8/10/16G FC32G capable10Gb FCoE384 ports any combinationFC and FCoEVSAN & Inter-VSANrouting3 Fan trays with true front toback airflowHitless software upgrade(ISSU)CRC checking, slow draindetection and resolutionMDS 9710DirectorFICONTaking the MDS heritage of non-stop operations to the next level
  7. 7. © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 7• Uses centralized arbitration to send trafficover the fabric modules and eliminate anyblocking• Virtual Output Queues (VOQ) providespredictable non-blocking performanceregardless of speed, throughput or framesize• Establishes a temporary connectionbetween an input and output port for theduration of the frame exchange• Uses standing arbitration requests to pathsthat supports queue look-ahead, priority,and provides fair access• CRC checking on every ingress and egressportIngressEgressCrossbarControl,SchedulingAll Cisco MDS Directors havedeterministic crossbar switching (fabricmodules) with central arbitration
  8. 8. © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 8• End-to-end fabric construction is one aspect of architecture, hardware contained in thefabric is the other• MDS is Enterprise-Class: Predictable and Reliable Performance• Consistent throughput and latency• No impact due to mixed traffic speeds• No performance dependency on port location or internal routing policies• Virtual Output Queues provides predictable non-blocking performance• CRC checks on ports allows for quick fault isolation• Integrated VSANs and Inter-VSAN Routing (IVR) enables SAN consolidation and device sharing• Port Channels with up to 16 links across any port of any module provides high-throughput and high-resiliencyPlease stop by the MDS 9710 demo pod for a 1 on 1 tour
  9. 9. © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 9• Twitter: @ciscoDC• Facebook.com/CiscoDC• Video: http://www.youtubecisco.com/datacenter• Cisco blog: http://blogs.cisco.com/datacenter• Slideshare: http://slideshare.com/CiscoDataCenterIn Collaboration with Intel®Intel and the Intel logo are trademarks of Intel Corporation in the U.S. and/or other countries.
  10. 10. © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 10© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 10

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