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1© Copyright 2013 EMC Corporation. All rights reserved.STORAGE AREANETWORKINGErik SmithSAN Technology update and best prac...
2© Copyright 2013 EMC Corporation. All rights reserved.Roadmap Information Disclaimer EMC makes no representation and und...
3© Copyright 2013 EMC Corporation. All rights reserved.Objectives For This Session1. Describe the recent changes in the SA...
4© Copyright 2013 EMC Corporation. All rights reserved.Agenda Recent FC and FCoE product changes EMC Best practice deep ...
5© Copyright 2013 EMC Corporation. All rights reserved.Recent FC and FCoE product changes Products– Support for Brocade V...
6© Copyright 2013 EMC Corporation. All rights reserved.Recent FC and FCoE product changes Recent new features:– In-flight...
7© Copyright 2013 EMC Corporation. All rights reserved.Recent FC and FCoE product changes Products– MDS-9710 is now suppo...
8© Copyright 2013 EMC Corporation. All rights reserved.Recent FC and FCoE product changes Firmware (target releases)– MDS...
9© Copyright 2013 EMC Corporation. All rights reserved.Recent FC and FCoE product changes Products– QFX3500, QFX3600 and ...
10© Copyright 2013 EMC Corporation. All rights reserved.Agenda Recent FC and FCoE product changes EMC Best practice deep...
11© Copyright 2013 EMC Corporation. All rights reserved.SAN Topology Overview
12© Copyright 2013 EMC Corporation. All rights reserved.Best Practice – Single Initiator Zoning Best practice– Each zone ...
13© Copyright 2013 EMC Corporation. All rights reserved.Best Practice – Single Initiator Zoning
14© Copyright 2013 EMC Corporation. All rights reserved.Best Practice – Single Initiator Zoning
15© Copyright 2013 EMC Corporation. All rights reserved.Best Practice – Single Initiator ZoningThe response will include a...
16© Copyright 2013 EMC Corporation. All rights reserved.Best Practice – Single Initiator ZoningWithout zoning, the respons...
17© Copyright 2013 EMC Corporation. All rights reserved.Best Practice – Single Initiator ZoningFor each port returned in t...
18© Copyright 2013 EMC Corporation. All rights reserved.Best Practice – Single Initiator Zoning Initiator login with Sing...
19© Copyright 2013 EMC Corporation. All rights reserved.Best Practice – Single Initiator Zoning Initiator login without Z...
20© Copyright 2013 EMC Corporation. All rights reserved.Best Practice – Single Initiator Zoning Initiator login without Z...
21© Copyright 2013 EMC Corporation. All rights reserved.Best Practice – Single Initiator Zoning Initiator login without Z...
22© Copyright 2013 EMC Corporation. All rights reserved.Best Practice – Single Initiator ZoningHost will attempt to PLOGI/...
23© Copyright 2013 EMC Corporation. All rights reserved.Single Initiator Zoning Summary Use single initiator / single tar...
24© Copyright 2013 EMC Corporation. All rights reserved.Agenda Recent FC and FCoE product changes EMC Best practice deep...
25© Copyright 2013 EMC Corporation. All rights reserved.Dynamic Interface Management Best practice– Enable “Dynamic Inter...
26© Copyright 2013 EMC Corporation. All rights reserved.Agenda Recent FC and FCoE product changes EMC Best practice deep...
27© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion Best practice– Monitor for congestion in t...
28© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion Oversubscription – A conditionthat exists ...
29© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion Congestion - A conditionthat exists when t...
30© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion Oversubscription and Congestion– On an Int...
31© Copyright 2013 EMC Corporation. All rights reserved.Example TopologyMonitor For Congestion (continued)Switch ASwitch B...
32© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion (continued) After failure– Demand may exce...
33© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion (continued) Under normal conditions– Monit...
34© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion (continued) Practice prevention!– Plan for...
35© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion (continued) Slow drain or Busy node– May b...
36© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion (continued) Slow drain or Busy node– May b...
37© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion (continued) Slow drain or Busy node– May b...
38© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion (continued) Slow drain or Busy node– May b...
39© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion (continued) Slow drainDetecting Problems a...
40© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion (continued) Slow drainDetecting Problems a...
41© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion (continued) Slow drainDetecting Problems a...
42© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion (continued) Slow drainDetecting Problems a...
43© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion (continued) Slow drainDetecting Problems a...
44© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion (continued) Slow drainDetecting Problems a...
45© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion (continued) Poor performance 80% rule doe...
46© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion (continued)1.Draw the fabric topology2.Dete...
47© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion (continued) Brocade - Enable bottleneck de...
48© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion (continued) When the slow drain is a stora...
49© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion (continued) Brocade– Enable bottleneck det...
50© Copyright 2013 EMC Corporation. All rights reserved.Agenda Recent FC and FCoE product changes EMC Best practice deep...
51© Copyright 2013 EMC Corporation. All rights reserved.Periodic SAN Health Checks Best practice– Perform periodic SAN He...
52© Copyright 2013 EMC Corporation. All rights reserved.Periodic SAN Health Checks Brocade– EMC SANity (Brocade SAN Healt...
53© Copyright 2013 EMC Corporation. All rights reserved.Agenda Recent FC and FCoE product changes EMC Best practice deep...
54© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Bit Errors Best practice– Monitor for bit errors Rea...
55© Copyright 2013 EMC Corporation. All rights reserved.Agenda Recent FC and FCoE product changes EMC Best practice deep...
56© Copyright 2013 EMC Corporation. All rights reserved.Practice Good Cable Hygiene Best practice– Clean your cable ends ...
57© Copyright 2013 EMC Corporation. All rights reserved.Practice Good Cable HygieneBad Good
58© Copyright 2013 EMC Corporation. All rights reserved.Practice Good Cable Hygiene Cleaning information:– Cisco▪ See “In...
59© Copyright 2013 EMC Corporation. All rights reserved.Practice Good Cable Hygiene 40G and MTP Connectors– Today 40G is ...
60© Copyright 2013 EMC Corporation. All rights reserved.Agenda Recent FC and FCoE product changes EMC Best practice deep...
61© Copyright 2013 EMC Corporation. All rights reserved.Run Target Releases Best practice– Target firmware versions are l...
62© Copyright 2013 EMC Corporation. All rights reserved.Agenda Recent FC and FCoE product changes EMC Best practice deep...
63© Copyright 2013 EMC Corporation. All rights reserved.Cloud IaaS Trends And The Impact To SANsInfrastructure as a Servic...
64© Copyright 2013 EMC Corporation. All rights reserved.Cloud IaaS Trends And The Impact To SANsInfrastructure as a Servic...
65© Copyright 2013 EMC Corporation. All rights reserved.Cloud IaaS Trends And The Impact To SANsStorage A Storage BHost Ho...
66© Copyright 2013 EMC Corporation. All rights reserved.Cloud IaaS Trends And The Impact To SANsStorage A Storage BHost Ho...
67© Copyright 2013 EMC Corporation. All rights reserved.Cloud IaaS Trends And The Impact To SANsComputeNetwork (L2)Storage...
68© Copyright 2013 EMC Corporation. All rights reserved.Cloud IaaS Trends And The Impact To SANsComputeNetwork (L2)Storage...
69© Copyright 2013 EMC Corporation. All rights reserved.Cloud IaaS Trends And The Impact To SANs
70© Copyright 2013 EMC Corporation. All rights reserved.Cloud IaaS Trends And The Impact To SANs
71© Copyright 2013 EMC Corporation. All rights reserved.Cloud IaaS Trends And The Impact To SANs
72© Copyright 2013 EMC Corporation. All rights reserved.Cloud IaaS Trends And The Impact To SANs
73© Copyright 2013 EMC Corporation. All rights reserved.Cloud IaaS Trends And The Impact To SANs
74© Copyright 2013 EMC Corporation. All rights reserved.Cloud IaaS Trends And The Impact To SANs
75© Copyright 2013 EMC Corporation. All rights reserved.Cloud IaaS Trends And The Impact To SANs
76© Copyright 2013 EMC Corporation. All rights reserved.Cloud IaaS Trends And The Impact To SANs
77© Copyright 2013 EMC Corporation. All rights reserved.Cloud IaaS Trends And The Impact To SANs
78© Copyright 2013 EMC Corporation. All rights reserved.Cloud IaaS Trends And The Impact To SANs
79© Copyright 2013 EMC Corporation. All rights reserved.In Summary Follow Best practices– Unless you have a compelling re...
80© Copyright 2013 EMC Corporation. All rights reserved.EMC Total Customer ExperienceVoice of Customer:• Loyalty Input fro...
81© Copyright 2013 EMC Corporation. All rights reserved.Additional information Please check out my blogwww.brasstacksblog...
82© Copyright 2013 EMC Corporation. All rights reserved.Additional information Or follow me on twitter!@ErikSmith7
83© Copyright 2013 EMC Corporation. All rights reserved.Learn More!ActivityKeynote • Brian Gallagher: (title of Brian’s ke...
84© Copyright 2013 EMC Corporation. All rights reserved.QUESTIONS?
85© Copyright 2013 EMC Corporation. All rights reserved.Visit us at the Mission CriticalStorage & Solutions BoothPlay our ...
Storage Area Networking: SAN Technology Update & Best Practice Deep Dive for FC, FCoE, & iSCSI SANs
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Storage Area Networking: SAN Technology Update & Best Practice Deep Dive for FC, FCoE, & iSCSI SANs

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Maintaining a high performance and highly available SAN requires you to understand the recent SAN developments and to possess an in-depth understanding of the problems you can encounter as well as the recommended best practices that have been created to avoid them. Join us for a discussion about the latest developments in the SAN space, the latest best practices and how they apply to FC, FCoE and iSCSI.


Objective 1: Describe the recent changes in the SAN space.
After this session you will be able to:
Objective 2: Describe EMC’s best practices and how they help reduce risk.
Objective 3: Understand trends with Cloud (IaaS) and how they do (and do not) intersect with traditional SANs.

Published in: Technology, Business

Transcript of "Storage Area Networking: SAN Technology Update & Best Practice Deep Dive for FC, FCoE, & iSCSI SANs"

  1. 1. 1© Copyright 2013 EMC Corporation. All rights reserved.STORAGE AREANETWORKINGErik SmithSAN Technology update and best practice deepdive for FC, FCoE and iSCSI SANs
  2. 2. 2© Copyright 2013 EMC Corporation. All rights reserved.Roadmap Information Disclaimer EMC makes no representation and undertakes no obligations withregard to product planning information, anticipated productcharacteristics, performance specifications, or anticipated releasedates (collectively, “Roadmap Information”). Roadmap Information is provided by EMC as an accommodation to therecipient solely for purposes of discussion and without intending to bebound thereby. Roadmap information is EMC Restricted Confidential and is providedunder the terms, conditions and restrictions defined in the EMC Non-Disclosure Agreement in place with your organization.
  3. 3. 3© Copyright 2013 EMC Corporation. All rights reserved.Objectives For This Session1. Describe the recent changes in the SAN space.2. Describe EMC’s best practices and how they helpreduce risk.3. Describe trends with Cloud (IaaS) and how they do(and do not) intersect with traditional SANs.
  4. 4. 4© Copyright 2013 EMC Corporation. All rights reserved.Agenda Recent FC and FCoE product changes EMC Best practice deep dive Cloud (IaaS) trends and the impact to SAN
  5. 5. 5© Copyright 2013 EMC Corporation. All rights reserved.Recent FC and FCoE product changes Products– Support for Brocade VDX and VCS Topologies– VCS: End-to-End FCoE and support for FIP SnoopingBridges (FSB) Firmware– FOS: v6.4.3d and FOS v7.0.2c (target releases June)– NOS: 3.0.1a (recommended)Connectrix-B / Brocade
  6. 6. 6© Copyright 2013 EMC Corporation. All rights reserved.Recent FC and FCoE product changes Recent new features:– In-flight Encryption and Compression on 16G capableInter-Switch Links (ISLs)– BB_Credit Loss detection and recovery on 16G ISLs– Enhanced optical Inter-Chassis Link (ICL) topology supportfor DCX 8510– D_Ports– Fabric Asssigned WWNConnectrix-B / Brocade (cont)
  7. 7. 7© Copyright 2013 EMC Corporation. All rights reserved.Recent FC and FCoE product changes Products– MDS-9710 is now supported by EMC– New 8G modules for the MDS 9513 with fabric 3▪ 32 port full line rate▪ 48 port 1.5:1 oversubscribed Topologies– UCS FI module “Direct attach” to EMC StorageConnectrix-MDS / Cisco
  8. 8. 8© Copyright 2013 EMC Corporation. All rights reserved.Recent FC and FCoE product changes Firmware (target releases)– MDS▪ 3.3(5b)▪ 4.2(7e)▪ 5.0(7) – Gen 3▪ 5.2(1) – Gen 4Connectrix-MDS / Cisco (cont)
  9. 9. 9© Copyright 2013 EMC Corporation. All rights reserved.Recent FC and FCoE product changes Products– QFX3500, QFX3600 and QFabric Topologies– Gateway mode (NPIV)▪ A connection to a Brocade or Cisco switch is required for FCoE– Transit Switch mode (FSB)▪ Connectivity to Brocade, Cisco or Juniper switches supportedJuniper
  10. 10. 10© Copyright 2013 EMC Corporation. All rights reserved.Agenda Recent FC and FCoE product changes EMC Best practice deep dive– Single Initiator Zoning– Dynamic Interface Management– Monitor for congestion– Periodic SAN Health checks– Monitoring for bit errors– Cable hygiene– Target releases Cloud (IaaS) trends and the impact to SAN
  11. 11. 11© Copyright 2013 EMC Corporation. All rights reserved.SAN Topology Overview
  12. 12. 12© Copyright 2013 EMC Corporation. All rights reserved.Best Practice – Single Initiator Zoning Best practice– Each zone should only contain one initiator and the targetsit will access Reason– Originally▪ Concern about initiators logging in to other initiators– Today▪ Limits the number of name server queries that are sent to the switch▪ Recommended due to its use in E-Lab test configurations
  13. 13. 13© Copyright 2013 EMC Corporation. All rights reserved.Best Practice – Single Initiator Zoning
  14. 14. 14© Copyright 2013 EMC Corporation. All rights reserved.Best Practice – Single Initiator Zoning
  15. 15. 15© Copyright 2013 EMC Corporation. All rights reserved.Best Practice – Single Initiator ZoningThe response will include all ports thatare logged in, have registered with theNS and are in the same zone as Host 1
  16. 16. 16© Copyright 2013 EMC Corporation. All rights reserved.Best Practice – Single Initiator ZoningWithout zoning, the response wouldinclude information about all host andstorage ports in the fabric
  17. 17. 17© Copyright 2013 EMC Corporation. All rights reserved.Best Practice – Single Initiator ZoningFor each port returned in the NSResponse, a host will query the NameServer for additional information.
  18. 18. 18© Copyright 2013 EMC Corporation. All rights reserved.Best Practice – Single Initiator Zoning Initiator login with Single Initiator Zoning– 4 hosts have been zoned to 1 target – 4 zones - (4:1)
  19. 19. 19© Copyright 2013 EMC Corporation. All rights reserved.Best Practice – Single Initiator Zoning Initiator login without Zoning– 32 hosts and 8 targets in the same “zone” (4:1)
  20. 20. 20© Copyright 2013 EMC Corporation. All rights reserved.Best Practice – Single Initiator Zoning Initiator login without Zoning– 64 hosts and 16 targets in the same “zone” (4:1)
  21. 21. 21© Copyright 2013 EMC Corporation. All rights reserved.Best Practice – Single Initiator Zoning Initiator login without Zoning– 204 hosts and 51 targets in the same “zone” (4:1)
  22. 22. 22© Copyright 2013 EMC Corporation. All rights reserved.Best Practice – Single Initiator ZoningHost will attempt to PLOGI/PRLI alldiscovered ports and perform REPORTLUNs with all Targets.
  23. 23. 23© Copyright 2013 EMC Corporation. All rights reserved.Single Initiator Zoning Summary Use single initiator / single target zoning if at allpossible If not possible or practical– e.g., some VMware and RecoverPoint environments– Learn to watch for signs of trouble▪ Randomly missing host or storage ports during power on or after linkevents▪ Elongated host boot times Target Driven Zoning will help when available!
  24. 24. 24© Copyright 2013 EMC Corporation. All rights reserved.Agenda Recent FC and FCoE product changes EMC Best practice deep dive– Single Initiator Zoning– Dynamic Interface Management– Monitor for congestion– Periodic SAN Health checks– Monitoring for bit errors– Cable hygiene– Target releases Cloud (IaaS) trends and the impact to SAN
  25. 25. 25© Copyright 2013 EMC Corporation. All rights reserved.Dynamic Interface Management Best practice– Enable “Dynamic Interface Management”▪ Brocade – Port Fencing▪ Cisco – Port Guard– Tested settings coming soon to the EMC FC SAN TopologiesTechBook Reason– Can prevent SAN outage by shutting down a misbehavinghost or storage port
  26. 26. 26© Copyright 2013 EMC Corporation. All rights reserved.Agenda Recent FC and FCoE product changes EMC Best practice deep dive– Single Initiator Zoning– Dynamic Interface Management– Monitor for congestion– Periodic SAN Health checks– Monitoring for bit errors– Cable hygiene– Target releases Cloud (IaaS) trends and the impact to SAN
  27. 27. 27© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion Best practice– Monitor for congestion in the fabric Reason– Unresolved congestion can spread throughout the fabricimpacting completely unrelated operating environments
  28. 28. 28© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion Oversubscription – A conditionthat exists when the potentialdemand exceeds the capacity ofthe system
  29. 29. 29© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion Congestion - A conditionthat exists when the actualdemand exceeds thecapacity of the system
  30. 30. 30© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion Oversubscription and Congestion– On an Inter Switch Link (ISL)▪ By design▪ After failure– At the N_Port▪ Slow drain
  31. 31. 31© Copyright 2013 EMC Corporation. All rights reserved.Example TopologyMonitor For Congestion (continued)Switch ASwitch B1 21 2H H H H H H HHT T T T T T TT250 250 250 250 250 250 250 2502 @ 16 Gb/s~3200 MB/s8 @ 250 MB/s~2000 MB/s By design– 8:1 considered normal– 8 Gb/s potential per 1Gb/scapacity Example– 8 HBAs @ 250 MB/s = 2000MB/s– 2 ISLs capable of 3200 MB/stotal– 2000/3200 = ~63% (OK)ISL Oversubscription
  32. 32. 32© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion (continued) After failure– Demand may exceed capacity Example– 8 HBAs demand 250 MB/s =2000 MB/s– 1 ISL capable 1600 MB/s total– 2000/1600 = 125% (NOTOK)– Each host will experiencebackpressure as port 1becomes congestedExample TopologyISL CongestionSwitch ASwitch B1 21 2H H H H H H HHT T T T T T TT250 250 250 250 250 250 250 2501 @ 16 Gb/s~1600 MB/s8 @ 250 MB/s~2000 MB/sX
  33. 33. 33© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion (continued) Under normal conditions– Monitor ISLs for utilization exceeding 80% Failure conditions– Monitor environment for loss of ISLs– Monitor ISLs for utilization exceeding 80%Detecting Problems Due to ISL Oversubscription
  34. 34. 34© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion (continued) Practice prevention!– Plan for failures, have spare capacity available in case an ISL fails Add additional capacity– If exceeding 80% frequently Topology change– Investigate host and storage placement– Storage on the core only when it makes sense Ensure features are enabled to make ISL use asefficient as possibleResolving Problems Due to ISL Oversubscription
  35. 35. 35© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion (continued) Slow drain or Busy node– May be unable to keep up with line rate due to workload– Could cause congestion spreadingDetecting Problems at the N_Port
  36. 36. 36© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion (continued) Slow drain or Busy node– May be unable to keep up with line rate due to workload– Could cause congestion spreadingDetecting Problems at the N_Port
  37. 37. 37© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion (continued) Slow drain or Busy node– May be unable to keep up with line rate due to workload– Could cause congestion spreadingDetecting Problems at the N_Port
  38. 38. 38© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion (continued) Slow drain or Busy node– May be unable to keep up with line rate due to workload– Could cause congestion spreadingDetecting Problems at the N_Port
  39. 39. 39© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion (continued) Slow drainDetecting Problems at the N_Port
  40. 40. 40© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion (continued) Slow drainDetecting Problems at the N_Port
  41. 41. 41© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion (continued) Slow drainDetecting Problems at the N_Port
  42. 42. 42© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion (continued) Slow drainDetecting Problems at the N_Port
  43. 43. 43© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion (continued) Slow drainDetecting Problems at the N_Port
  44. 44. 44© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion (continued) Slow drainDetecting Problems at the N_Port
  45. 45. 45© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion (continued) Poor performance 80% rule does not apply here– A slow drain is unable to run at line rate and will not hit 80% Monitor F_Ports for time spent at zero Tx Credit– Careful, some number of these per day are normal– Need to find out what is normal in your environment and look for exception cases Transmit LR may be incrementing on switch ports insevere casesDetecting Problems Due to a Slow Drain
  46. 46. 46© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion (continued)1.Draw the fabric topology2.Determine which ISLs are in use by the impacteddevices3.Look at all FC Switch ports involved and gatherbaseline statistics4.Look at all FC Switch ports involved and gatherstatistics (2nd time)5.AnalyzeIdentifying a Slow Drain (Option 1)
  47. 47. 47© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion (continued) Brocade - Enable bottleneck detection– See the “Brocade Network Advisor SAN User Manual” Cisco – Configure Slow Drain Device Detection– See “Configuring Average Credit Non-Available Duration Threshold andAction” in the MDS Interface Configuration guideIdentifying a Slow Drain (Option 2)
  48. 48. 48© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion (continued) When the slow drain is a storage port– Not as common as you would think– SCSI typically throttles bandwidth, not link level flow control When the slow drain is a host port– SCSI incast (similar to TCP incast)– Likelihood of encountering this type of problem may increase as the number of VMsper Hypervisor increase. When the slow drain is a congested ISL– Add additional capacity– Your 80% rule should have caught this!Slow Drain scenarios
  49. 49. 49© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Congestion (continued) Brocade– Enable bottleneck detection– Configure Edge Hold time Cisco – Configure Slow Drain Device Detection andCongestion Avoidance– Stuck Frame timeout value– No-Credit timeout valueResolving Slow Drain related problems automatically
  50. 50. 50© Copyright 2013 EMC Corporation. All rights reserved.Agenda Recent FC and FCoE product changes EMC Best practice deep dive– Single Initiator Zoning– Dynamic Interface Management– Monitor for congestion– Periodic SAN Health checks– Monitoring for bit errors– Cable hygiene– Target releases Cloud (IaaS) trends and the impact to SAN
  51. 51. 51© Copyright 2013 EMC Corporation. All rights reserved.Periodic SAN Health Checks Best practice– Perform periodic SAN Health checks Reason– An ounce of prevention is worth a pound of cure
  52. 52. 52© Copyright 2013 EMC Corporation. All rights reserved.Periodic SAN Health Checks Brocade– EMC SANity (Brocade SAN Health)– A free utility that you download and run in your environment▪ Provides a spreadsheet including historical performance monitoringdata▪ Also provides a visio diagram of your fabric! Brocade and Cisco– EMC E-Lab Advisor– Upload the output from “supportshow” or “show tech-support”and a report will be produced.▪ Validates that you are running the latest versions and checks for error conditions
  53. 53. 53© Copyright 2013 EMC Corporation. All rights reserved.Agenda Recent FC and FCoE product changes EMC Best practice deep dive– Single Initiator Zoning– Dynamic Interface Management– Monitor for congestion– Periodic SAN Health checks– Monitoring for bit errors– Cable hygiene– Target releases Cloud (IaaS) trends and the impact to SAN
  54. 54. 54© Copyright 2013 EMC Corporation. All rights reserved.Monitor For Bit Errors Best practice– Monitor for bit errors Reason– Periodic bit errors can lead to BB_Credit Loss▪ Each bit error has ~ 1 in 263 chance of landing in the middle of anR_RDY– Becoming less of a problem as BB_Credit recovery is supportedon more platforms.▪ Brocade – Default on when portcfglongdistance is set▪ Cisco – Automatically enabled on E or TE ports▪ You still need to monitor F_Ports (host and storage ports)
  55. 55. 55© Copyright 2013 EMC Corporation. All rights reserved.Agenda Recent FC and FCoE product changes EMC Best practice deep dive– Single Initiator Zoning– Dynamic Interface Management– Monitor for congestion– Periodic SAN Health checks– Monitoring for bit errors– Cable hygiene– Target releases Cloud (IaaS) trends and the impact to SAN
  56. 56. 56© Copyright 2013 EMC Corporation. All rights reserved.Practice Good Cable Hygiene Best practice– Clean your cable ends before insertion Reason– See previous discussion about monitoring for bit errors– Cleaning cable ends resolves 80%+ of the physicalconnectivity problems that we see in the field.
  57. 57. 57© Copyright 2013 EMC Corporation. All rights reserved.Practice Good Cable HygieneBad Good
  58. 58. 58© Copyright 2013 EMC Corporation. All rights reserved.Practice Good Cable Hygiene Cleaning information:– Cisco▪ See “Inspection and Cleaning Procedures for Fiber-Optic Connections”– Finisar▪ See “PREVENTIVE MAINTENANCE OF FIBER OPTIC CABLES ANDFINISAR OPTICS”
  59. 59. 59© Copyright 2013 EMC Corporation. All rights reserved.Practice Good Cable Hygiene 40G and MTP Connectors– Today 40G is actually a parallel connection(4x10G)– MTP Connectors contain 12 fiber strands▪ Only 8 are used with 40G.– Cleaning these connectors (both sides) isvery important
  60. 60. 60© Copyright 2013 EMC Corporation. All rights reserved.Agenda Recent FC and FCoE product changes EMC Best practice deep dive– Single Initiator Zoning– Dynamic Interface Management– Monitor for congestion– Periodic SAN Health checks– Monitoring for bit errors– Cable hygiene– Target releases Cloud (IaaS) trends and the impact to SAN
  61. 61. 61© Copyright 2013 EMC Corporation. All rights reserved.Run Target Releases Best practice– Target firmware versions are listed in the EMC SupportMatrix and are denoted with a (T)– Run a Target (T) release if possible Reason– Target releases have a proven track record for being stableand free of major defects.
  62. 62. 62© Copyright 2013 EMC Corporation. All rights reserved.Agenda Recent FC and FCoE product changes EMC Best practice deep dive Cloud (IaaS) trends and the impact to SAN
  63. 63. 63© Copyright 2013 EMC Corporation. All rights reserved.Cloud IaaS Trends And The Impact To SANsInfrastructure as a Service (IaaS)• Compute, Network andstorage resources• Typically:I. Web orderableII. Automaticallyconfigured
  64. 64. 64© Copyright 2013 EMC Corporation. All rights reserved.Cloud IaaS Trends And The Impact To SANsInfrastructure as a Service (IaaS)• External array basedstorage is implied in thismodel• Connectivity via FC,FCoE, iSCSI or NAS
  65. 65. 65© Copyright 2013 EMC Corporation. All rights reserved.Cloud IaaS Trends And The Impact To SANsStorage A Storage BHost Host Host HostVM VM VM VM VML2 / Switch / Ethernet SAN BSAN ALANPod
  66. 66. 66© Copyright 2013 EMC Corporation. All rights reserved.Cloud IaaS Trends And The Impact To SANsStorage A Storage BHost Host Host HostVM VM VM VM VMLANPodL2 / Switch / DCB Ethernet
  67. 67. 67© Copyright 2013 EMC Corporation. All rights reserved.Cloud IaaS Trends And The Impact To SANsComputeNetwork (L2)StoragePod ANetwork (L3)
  68. 68. 68© Copyright 2013 EMC Corporation. All rights reserved.Cloud IaaS Trends And The Impact To SANsComputeNetwork (L2)StorageVM VMPod ANetwork (L3)
  69. 69. 69© Copyright 2013 EMC Corporation. All rights reserved.Cloud IaaS Trends And The Impact To SANs
  70. 70. 70© Copyright 2013 EMC Corporation. All rights reserved.Cloud IaaS Trends And The Impact To SANs
  71. 71. 71© Copyright 2013 EMC Corporation. All rights reserved.Cloud IaaS Trends And The Impact To SANs
  72. 72. 72© Copyright 2013 EMC Corporation. All rights reserved.Cloud IaaS Trends And The Impact To SANs
  73. 73. 73© Copyright 2013 EMC Corporation. All rights reserved.Cloud IaaS Trends And The Impact To SANs
  74. 74. 74© Copyright 2013 EMC Corporation. All rights reserved.Cloud IaaS Trends And The Impact To SANs
  75. 75. 75© Copyright 2013 EMC Corporation. All rights reserved.Cloud IaaS Trends And The Impact To SANs
  76. 76. 76© Copyright 2013 EMC Corporation. All rights reserved.Cloud IaaS Trends And The Impact To SANs
  77. 77. 77© Copyright 2013 EMC Corporation. All rights reserved.Cloud IaaS Trends And The Impact To SANs
  78. 78. 78© Copyright 2013 EMC Corporation. All rights reserved.Cloud IaaS Trends And The Impact To SANs
  79. 79. 79© Copyright 2013 EMC Corporation. All rights reserved.In Summary Follow Best practices– Unless you have a compelling reason not to– Understand the risks if you deicide to follow the path less traveled FC and FCoE will be around for a while Cloud IaaS environment could present a challenge to FC andFCoE.
  80. 80. 80© Copyright 2013 EMC Corporation. All rights reserved.EMC Total Customer ExperienceVoice of Customer:• Loyalty Input from our Customers• Transactional Satisfaction on steps of the CJM• Benchmarking against best practicesVoice of Partner:• Loyalty input from our Partner Ecosystem• Improving how we enable our partnersProduct Quality Scorecard:• Focus on hardware, software, and services• Analysis of quality metricsVoice of Field:• Formalize feedback from EMC Field Leaders• Their view on how we are doing with ourCustomers and PartnersBuying Deploying ServicingUsing(Product)CUSTOMER JOURNEY MAPUnified Analytics PlatformA Customer & Partner focused data-driven approach to continuous improvement
  81. 81. 81© Copyright 2013 EMC Corporation. All rights reserved.Additional information Please check out my blogwww.brasstacksblog.typepad.com
  82. 82. 82© Copyright 2013 EMC Corporation. All rights reserved.Additional information Or follow me on twitter!@ErikSmith7
  83. 83. 83© Copyright 2013 EMC Corporation. All rights reserved.Learn More!ActivityKeynote • Brian Gallagher: (title of Brian’s keynote TBD)Lectures • Title• Title• And so forth (title only… speaker names arenot published, by the way)Birds-of-a-Feather • TitleHands on Labs • TitlePartner Lectures • TitleSolutions Pavilion • Name of Demo or solution area
  84. 84. 84© Copyright 2013 EMC Corporation. All rights reserved.QUESTIONS?
  85. 85. 85© Copyright 2013 EMC Corporation. All rights reserved.Visit us at the Mission CriticalStorage & Solutions BoothPlay our Cloud Defender game, win coolprizes, and get your picture taken with theData City Defenders!

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