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Copyright	
  ©	
  2017,	
  Oracle	
  and/or	
  its	
  affiliates.	
  All	
  rights	
  reserved.	
  	
  |	
  
Oracle	
  RAC	
...
Copyright	
  ©	
  2017,	
  Oracle	
  and/or	
  its	
  affiliates.	
  All	
  rights	
  reserved.	
  	
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Safe	
  Harbor	...
Copyright	
  ©	
  2017,	
  Oracle	
  and/or	
  its	
  affiliates.	
  All	
  rights	
  reserved.	
  	
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Program	
  Agen...
Copyright	
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  2017,	
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  its	
  affiliates.	
  All	
  rights	
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Program	
  Agen...
Copyright	
  ©	
  2017,	
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  affiliates.	
  All	
  rights	
  reserved.	
  	
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Oracle	
  RAC	
...
Copyright	
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  and/or	
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  affiliates.	
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   7	
  
Cluster	
...
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The	
  DS...
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Domain	
  Servi...
Copyright	
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   10	
  
Rapid	
 ...
Copyright	
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Rapid	
 ...
Copyright	
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Zero	
  Impact	...
Copyright	
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Domain	
...
Copyright	
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Cluster	...
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•  A	
  Member	...
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Same	
  ...
Copyright	
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  All	
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•  Easy	
  conv...
Copyright	
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Program	
  Agen...
Copyright	
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Cluster	...
Copyright	
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Database	
  Mem...
Copyright	
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Cluster	...
Copyright	
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Database	
  
Me...
Copyright	
  ©	
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   23	
  
Cluster	...
Copyright	
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Database	
  
Me...
Copyright	
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All	
  D...
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101010100001001...
Copyright	
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Database	
  
Me...
Copyright	
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Hang	
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Resolvin...
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Oracle	
  RAC	
...
Copyright	
  ©	
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  and/or	
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  All	
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  reserved.	
  	
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Database	
  
Me...
Copyright	
  ©	
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  All	
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  reserved.	
  	
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Program	
  Agen...
BT:	
  	
  
Cluster	
  Domains	
  in	
  AcRon	
  
Dave	
  Hickson	
  –	
  Database	
  Architect	
  
BT	
  
October	
  3,	
...
©	
  BriRsh	
  TelecommunicaRons	
  plc	
  
About	
  BT	
  
•  The	
  UK’s	
  largest	
  broadband	
  provider	
  
•  The	...
©	
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  TelecommunicaRons	
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Context	
  –	
  ExisRng	
  Database	
  and	
  RAC	
  Services	
  in	
  BT	
  
...
©	
  BriRsh	
  TelecommunicaRons	
  plc	
  
Cluster	
  Domains	
  –	
  What	
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  been	
  doing	
  
•  Test	
  envir...
©	
  BriRsh	
  TelecommunicaRons	
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Cluster	
  Domains	
  –	
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  architecture	
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©	
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Cluster	
  Domains	
  –	
  our	
  overall	
  impression	
  	
  
•  Architectur...
Copyright	
  ©	
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Oracle	
  RAC	
...
Copyright	
  ©	
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  and/or	
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   40	
  
Oracle RAC 12c Rel. 2 & Cluster Architecture Internals OOW17 by Anil Nair
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Oracle RAC 12c Rel. 2 & Cluster Architecture Internals OOW17 by Anil Nair

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Oracle OpenWorld 2017 presentation on Oracle RAC 12c Rel. 2 & Cluster Architecture Internals. Presented by Anil Nair together with Dave Hickson, Database Architect, British Telecom (BT).

This presentation focuses on new Cluster Architectures introduced with Oracle RAC 12c Rel. 2 and how internal enhancements in Oracle RAC can help to facilitate them.

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Oracle RAC 12c Rel. 2 & Cluster Architecture Internals OOW17 by Anil Nair

  1. 1. Copyright  ©  2017,  Oracle  and/or  its  affiliates.  All  rights  reserved.    |   Oracle  RAC  12c  Release  2  and     Cluster  Architecture  Internals   Anil  Nair,  Ian  Cookson  -­‐  Oracle  RAC  Product  Management  -­‐  Oracle   Dave  Hickson  –  Database  Architect  –  BT   October  3,  2017  
  2. 2. Copyright  ©  2017,  Oracle  and/or  its  affiliates.  All  rights  reserved.    |   Safe  Harbor  Statement   The  following  is  intended  to  outline  our  general  product  direcRon.  It  is  intended  for   informaRon  purposes  only,  and  may  not  be  incorporated  into  any  contract.  It  is  not  a   commitment  to  deliver  any  material,  code,  or  funcRonality,  and  should  not  be  relied  upon   in  making  purchasing  decisions.  The  development,  release,  and  Rming  of  any  features  or   funcRonality  described  for  Oracle’s  products  remains  at  the  sole  discreRon  of  Oracle.   3  
  3. 3. Copyright  ©  2017,  Oracle  and/or  its  affiliates.  All  rights  reserved.    |   Program  Agenda   Cluster  Domain  Architecture   Member  Cluster  use  cases   BT  –  Cluster  Domains  in  AcRon         1   2   4   3  
  4. 4. Copyright  ©  2017,  Oracle  and/or  its  affiliates.  All  rights  reserved.    |   Program  Agenda   Cluster  Domain  Architecture   Member  Cluster  use  cases   BT  –  Cluster  Domains  in  AcRon         1   2   5   3  
  5. 5. Copyright  ©  2017,  Oracle  and/or  its  affiliates.  All  rights  reserved.    |   Oracle  RAC  12c  Rel.  2  Cluster  Domain   •  Simplified  Management   – Fleet  Management  for  installaRon,   update,  patching  and  maintenance   •  Reduced  Local  Overhead   – Member  Clusters  benefit  from  the   consolidaRon  of  common  services     on  the  Domain  Services  Cluster   •  Improved  IO  Performance   – URlizing  consolidated  shared  storage   6   Centralized  Management  for  Cluster  Estates  “too  big  to  manage”  otherwise  
  6. 6. Copyright  ©  2017,  Oracle  and/or  its  affiliates.  All  rights  reserved.    |   7   Cluster  Domain   Applica@on     Member  Cluster   Uses  ASM   Database   Member  Cluster   Uses  local  ASM   Database   Member  Cluster   Uses  ASM   Service   Database   Member  Cluster   Uses  IO  Service   Domain  Services  Cluster     (DSC)   Shared  ASM   IO   Service   ACFS   Service   ASM   Service   TFA   Service   Management   Service   RHP   Service  
  7. 7. Copyright  ©  2017,  Oracle  and/or  its  affiliates.  All  rights  reserved.    |   8   The  DSC  –  The  Heart  of  the  Cluster  Domain   Domain  Services  Cluster  (DSC)   IO   Service   ASM   Service   TFA   Service   Management   Service   Shared  ASM   ACFS   Service   RHP   Service   •  The  DSC  hosts  services  that  are  consumed  by  Member  Clusters,  including:   –  Management  Service  for  centralized  and  simplified  management     –  Trace  File  Analyzer  (TFA)  for  centralized  diagnosRcs   –  Rapid  Home  Provisioning  (RHP)  for  so`ware  fleet  management   –  Storage  Services  (ACFS,  ASM  direct  or  indirect  over  IO  Service)  
  8. 8. Copyright  ©  2017,  Oracle  and/or  its  affiliates.  All  rights  reserved.    |   Domain  Services  Cluster  (DSC)   IO   Service   ASM   Service   Shared  ASM   ACFS   Service   RHP   Service   9   The  DSC  Management  Service   TFA   Service   Management   Service   Applied  Machine  Learning  for  Database  Diagnos@cs   •  Efficient  diagnosis  using  Machine  Learning   •  AutomaRcally  performs  correcRve  acRons  to   prevent  possible  issues   •  Provides  simple  alerts  &  recommendaRons  for   issues  that  require  manual  intervenRon   Subject  MaOer   Expert   ASH   ML   Knowledge   Extrac@on   Model   Genera@on   Human     Supervision   Applica@on   Op@mized   Models   Feedback  
  9. 9. Copyright  ©  2017,  Oracle  and/or  its  affiliates.  All  rights  reserved.    |   10   Rapid  Home  Provisioning  Service     Domain  Services  Cluster  (DSC)   IO   Service   ASM   Service   Shared  ASM   ACFS   Service   RHP   Service   TFA   Service   Management   Service   •  Provision  new  pools  onto  base  machines   •  DB  and  GI:  provision,  scale,  patch,  upgrade   •  Custom  workflow  framework   •  NoRficaRon  model   •  Audit  capabiliRes   RHP   Service   Member   Cluster   Member   Cluster   Member   Cluster   Fleet  Management  installa@on,  update,  patching  and  maintenance    
  10. 10. Copyright  ©  2017,  Oracle  and/or  its  affiliates.  All  rights  reserved.    |   11   Rapid  Home  Provisioning  Service     Domain  Services  Cluster  (DSC)   IO   Service   ASM   Service   Shared  ASM   ACFS   Service   RHP   Service   TFA   Service   Management   Service   •  Provision  new  pools  onto  base  machines   •  DB  and  GI:  provision,  scale,  patch,  upgrade   •  Custom  workflow  framework   •  NoRficaRon  model   •  Audit  capabiliRes   RHP   Service   Member   Cluster   Member   Cluster   Member   Cluster   Fleet  Management  in  the  Oracle  Cloud  and  On-­‐Premise  
  11. 11. Copyright  ©  2017,  Oracle  and/or  its  affiliates.  All  rights  reserved.    |   Zero  Impact  Patching     •  Zero  Impact  Patching  enables  patching  of  the  Oracle  Grid  Infrastructure  without   interrupRng  database  operaRons.     •  Patches  are  applied  out-­‐of-­‐place  and  in  a  rolling  fashion  with  one  node  being  patched  at   a  Rme  while  the  database  instance(s)  on  that  node  remain  up  and  running.       •  Zero  Impact  Patching  supports  Oracle  Real  ApplicaRon  Clusters  (RAC)  databases  on   clusters  with  two  or  more  nodes.   12   Never  take  down  a  database  instance  to  patch  Grid  Infrastructure  
  12. 12. Copyright  ©  2017,  Oracle  and/or  its  affiliates.  All  rights  reserved.    |   13   Domain  Services  Cluster  (DSC)  Availability   •  Services  provided  by  the  DSC  are   unaffected  by  nodes  joining/   leaving  the  DSC  cluster     •  DSC  can  be  patched  and  upgraded   independently  without  affecRng   the  services  provided  by  DSC   •  Use  Member  Clusters  for  user   databases  (not  the  DSC)  
  13. 13. Copyright  ©  2017,  Oracle  and/or  its  affiliates.  All  rights  reserved.    |   14   Cluster  Domain   Applica@on     Member  Cluster   Uses  ASM   Database   Member  Cluster   Uses  local  ASM   Database   Member  Cluster   Uses  ASM   Service   Database   Member  Cluster   Uses  IO  Service   Domain  Services  Cluster     (DSC)   Shared  ASM   IO   Service   ACFS   Service   ASM   Service   TFA   Service   Management   Service   RHP   Service  
  14. 14. Copyright  ©  2017,  Oracle  and/or  its  affiliates.  All  rights  reserved.    |   •  A  Member  Cluster  is  a  Standalone   Cluster  uRlizing  shared  services  on   the  Domain  Services  Cluster   •  It  automaRcally  benefits  from  the   management,  TFA  &  RHP  service.     – ASM  services  are  opRonal   – and  can  be  uRlized  as  needed   15   Member  Clusters  =  Standalone  Cluster  +  Benefits   Database   Member  Cluster   Uses  local  ASM   Database   Member  Cluster   Uses  ASM   Service  of    DSC   Database   Member  Cluster   Uses  ASM  IO   Service  
  15. 15. Copyright  ©  2017,  Oracle  and/or  its  affiliates.  All  rights  reserved.    |   16   Same  Tools  and  Commands  for  all  Types  of  Deployments   [GRID]>  crsctl  get  cluster  name   CRS-­‐6724:  Current  cluster  name  is  'SolarCluster'     [GRID]>  crsctl  get  cluster  class   CRS-­‐41008:  Cluster  class  is  'Standalone  Cluster'     [GRID]>  crsctl  get  cluster  type     CRS-­‐6539:  The  cluster  type  is  'flex'.   [GRID]>  crsctl  get  cluster  name   CRS-­‐6724:  Current  cluster  name  is  'SalesCluster'     [GRID]>  crsctl  get  cluster  class   CRS-­‐41008:  Cluster  class  is  ‘Database  Member  Cluster'     [GRID]>  crsctl  get  cluster  type     CRS-­‐6539:  The  cluster  type  is  'flex'.  
  16. 16. Copyright  ©  2017,  Oracle  and/or  its  affiliates.  All  rights  reserved.    |   •  Easy  conversion  from     Standalone  to  Member  Clusters   •  Member  Cluster  GI  version  can  be   higher  or  equal  to  the  GI  version  on   the  Domain  Services  Cluster   17   Convert  a  Standalone  Cluster  to  Member  Cluster   Convert   Database   Member  Cluster   Uses  local  ASM  
  17. 17. Copyright  ©  2017,  Oracle  and/or  its  affiliates.  All  rights  reserved.    |   Program  Agenda   Cluster  Domain  Architecture   Member  Cluster  use  cases   BT  –  Cluster  Domains  in  AcRon         1   2   18   3  
  18. 18. Copyright  ©  2017,  Oracle  and/or  its  affiliates.  All  rights  reserved.    |   19   Cluster  Domain   Applica@on     Member  Cluster   Uses  ASM   Database   Member  Cluster   Uses  local  ASM   Database   Member  Cluster   Uses  ASM   Service   Database   Member  Cluster   Uses  IO  Service   Domain  Services  Cluster     (DSC)   Shared  ASM   IO   Service   ACFS   Service   ASM   Service   TFA   Service   Management   Service   RHP   Service  
  19. 19. Copyright  ©  2017,  Oracle  and/or  its  affiliates.  All  rights  reserved.    |   Database  Member  Cluster  with  Local  ASM   •  For  databases  requiring     – Full  IsolaRon  and  performance  stability   – That  can  benefit  from  the  centralized   Management  Service  on  the  DSC   •  ParRcularly  suitable  for  unpredictable   workloads,  or  highly  variable  workloads   •  Examples  include     – Business  Intelligence  and  AnalyRcs  systems   – Batch  processing  systems   – Response-­‐criRcal,  user-­‐facing  systems   20   Standalone  isola@on  with  reduced  local  overhead   Database   Member  Cluster   Uses  local  ASM  
  20. 20. Copyright  ©  2017,  Oracle  and/or  its  affiliates.  All  rights  reserved.    |   21   Cluster  Domain   Applica@on     Member  Cluster   Uses  ASM   Database   Member  Cluster   Uses  ASM   Service   Database   Member  Cluster   Uses  IO  Service   Domain  Services  Cluster     (DSC)   Shared  ASM   IO   Service   ACFS   Service   ASM   Service   TFA   Service   Management   Service   RHP   Service   Database   Member  Cluster   Uses  local  ASM  
  21. 21. Copyright  ©  2017,  Oracle  and/or  its  affiliates.  All  rights  reserved.    |   Database   Member  Cluster   Uses  ASM   Service  of    DSC   Database  Member  Cluster  Using  ASM  Service   •  For  databases  requiring     –  IsolaRon  and  performance  stability   –  That  can  benefit  from  the  centralized     Management  Service  on  the  DSC   –  And  the  centralized  ASM  Storage   Management  Service  on  the  DSC   •  Best  suited  for  workloads  for  which  IO     stability  is  important,  but  benefit  from     the  centralized  ASM  Services  on  the  DSC   •  Examples  include     –  OLTP  systems     –  ReporRng  systems   22   Standalone  isola@on  benefihng  from  consolidated  shared  storage     ASM   Service  
  22. 22. Copyright  ©  2017,  Oracle  and/or  its  affiliates.  All  rights  reserved.    |   23   Cluster  Domain   Applica@on     Member  Cluster   Uses  ASM   Database   Member  Cluster   Uses  local  ASM   Database   Member  Cluster   Uses  ASM   Service   Database   Member  Cluster   Uses  IO  Service   Domain  Services  Cluster     (DSC)   Shared  ASM   IO   Service   ACFS   Service   ASM   Service   TFA   Service   Management   Service   RHP   Service  
  23. 23. Copyright  ©  2017,  Oracle  and/or  its  affiliates.  All  rights  reserved.    |   Database   Member  Cluster   Uses  ASM  IO   Service   Database  Member  Cluster  Using  the  IO  Service   •  For  databases     – That  need  to  be  deployed  quickly     – or  cloned  or  duplicated  frequently   •  Ideal  for  databases  that  can  allow  for  IO   path  sharing  with  other  Member  Clusters,   while  maintaining  control  of  local  cluster   processing,  workload  and  resources   •  Examples  include   – Test,  integraRon,  development  systems   •  For  which  maintaining  addiRonal  hardware     (e.g.  SAN  networks  and  storage)  is  inefficient     24   Consolida@on  at  its  best  u@lizing  full  resource  sharing     IO   Service   ASM   Service  
  24. 24. Copyright  ©  2017,  Oracle  and/or  its  affiliates.  All  rights  reserved.    |   25   All  Deployments  Benefit  from  Oracle  RAC  Features     PDB  Isola@on   Hang   Manager   Choose  the   “right  path”  
  25. 25. Copyright  ©  2017,  Oracle  and/or  its  affiliates.  All  rights  reserved.    |   1010101000010011100101001 1011100101001110010100101 0010010100001111010100101 26   •  Using  Oracle  MulRtenant,  PDBs  can  be  opened     as  singletons  (in  one  database  instance  only),  in     a  subset  of  instances  or  all  in  instances  at  once.     •  If  certain  PDBs  are  only  opened  on  some   instances,  Pluggable  Database  Isola/on     –  improves  performance  by   •  Reducing  DLM  operaRons  for     PDBs  not  open  in  all  instances.     •  OpRmizing  block  operaRons  based     on  in-­‐memory  block  separaRon.     –  improves  availability  by   •  Ensuring  that  instance  failures  of  instances   only  hosRng  singleton  PDBs  will  not  impact     other  instances  of  the  same  RAC-­‐based  CDB.   Pluggable  Database  and  Service  IsolaRon   NEW  IN  12.2   Inter  Cluster  Messages  
  26. 26. Copyright  ©  2017,  Oracle  and/or  its  affiliates.  All  rights  reserved.    |   Database   Member  Cluster   Uses  ASM  Service   27   Pluggable  Database  and  Service  IsolaRon   Provides  higher  IsolaRon  in  Member  Cluster  Consolidated  Environments  
  27. 27. Copyright  ©  2017,  Oracle  and/or  its  affiliates.  All  rights  reserved.    |   Hang  Manager   • Hang  Manager  “manages”  database   process(es)  that  are  not  progressing   – Manage  =  detec@on  and  resolu@on   – Considers  cross-­‐layer  hangs     •  I.E:    Hangs  caused  by  a  blocked  ASM  resource.     • In  addiRon,  deadlocks  are  now   resolved  by  Hang  Manager   • User  defined  control  via  PL/SQL       • Early  Warning  exposed  via  (V$  view)     28   Resolving  cross-­‐layer  hangs  in  the  Cluster  Domain   Database   Member  Cluster   Uses  ASM  IO   Service   IO   Service   ASM   Service  
  28. 28. Copyright  ©  2017,  Oracle  and/or  its  affiliates.  All  rights  reserved.    |   29   Resolving  cross-­‐layer  hangs  in  the  Cluster  Domain   Provides  higher  Availability  in  Member  Cluster  Consolidated  Environments   Database   Member  Cluster   Uses  ASM  Service   W   W   W   B
  29. 29. Copyright  ©  2017,  Oracle  and/or  its  affiliates.  All  rights  reserved.    |   Oracle  RAC  Always  Chooses  the  “Right  Path”   30   •  RAC  determines  the  opRmal  path   to  serve  blocks  –  network  or  disk       •  SSDs  and  NVMe  storage  technology   conRnue  to  drive  down  latency   •  e.g.  flash  storage  may  provide  beser   access  Rmes  to  data  than  the  private   network  under  high  load   •  RAC  takes  those  staRsRcs  into  account   Query   Block  Block   Network   congesRon  
  30. 30. Copyright  ©  2017,  Oracle  and/or  its  affiliates.  All  rights  reserved.    |   Database   Member  Cluster   Uses  ASM  Service   31   The  “Right  Path”  Ensures  Performance  on  Member  Clusters   EffecRvely  reducing  the  impact  of  compeRng  workloads  overwhelming  the  I/O  on  the  DSC   B u s y
  31. 31. Copyright  ©  2017,  Oracle  and/or  its  affiliates.  All  rights  reserved.    |   Program  Agenda   Cluster  Domain  Architecture   Member  Cluster  use  cases   BT  –  Cluster  Domains  in  AcRon         1   2   32   3  
  32. 32. BT:     Cluster  Domains  in  AcRon   Dave  Hickson  –  Database  Architect   BT   October  3,  2017  
  33. 33. ©  BriRsh  TelecommunicaRons  plc   About  BT   •  The  UK’s  largest  broadband  provider   •  The  UK’s  largest  last-­‐mile  network  provider   •  The  UK’s  largest  wide  area  network  provider   •  In  EE,  the  UK’s  best  largest  and  best  mobile  network  provider   •  A  global  footprint  operaRng  in  180  countries   •  BT  Sport  delivering  Premiership  and  UEFA  football   •  All  underpinned  by  Technology,  Service  and  OperaRons  
  34. 34. ©  BriRsh  TelecommunicaRons  plc   Context  –  ExisRng  Database  and  RAC  Services  in  BT   •  Large  scale,  on-­‐premise  Enterprise  Cloud   •  Thousands  of  databases,  hundreds  of  RACs   •  Increasing  rate  of  growth   •  Lots  of  automaRon  but  …   •  We  need  smarter  ways  to   –  Deliver  RAC  clusters  more  quickly   –  Administrate  more  efficiently   –  Enable  customer  self-­‐service   •  What  we  need  is  a  more  Cloud-­‐oriented  RAC  architecture  
  35. 35. ©  BriRsh  TelecommunicaRons  plc   Cluster  Domains  –  What  we’ve  been  doing   •  Test  environment  on  BT  Enterprise  Cloud   –  Four  node  Domain  Services  Cluster   –  8  Member  Clusters   –  OEM  13.2   –   VMware-­‐based  infrastructure   •  Key  Features  we’re  interested  in  (in  no  par@cular  order!)   –  IO  Server   –  Rapid  Home  Provisioning   –  Autonomous  Health  Framework   –  ApplicaRon  Containers  
  36. 36. ©  BriRsh  TelecommunicaRons  plc   Cluster  Domains  –  Why  is  this  architecture  asracRve  to  us?   •  I/O  Server   –  Replace  hundreds  of    independent  pools  of  storage  with  centralised  pools   –  Increase  storage  on  member  clusters  without  infrastructure  changes   •  Rapid  Home  Provisioning   –  Centralised  management  of  Oracle  so`ware  for  patching  and  upgrading   •  Autonomous  Health  Framework   –  Replace  many  independent  management  repositories  with  one                Goal  for  BT  is  simple:  Reduce  Overhead  of  Many  RAC  Clusters  
  37. 37. ©  BriRsh  TelecommunicaRons  plc   Cluster  Domains  –  our  overall  impression     •  Architecturally  this  is  the  right  direc@on   –  Database  servers  run  databases  without  having  to  administer  infrastructure   –  “Infrastructure”  tasks  such  as  storage,  performance,  so`ware  managed  centrally   •  Applica@on  Containers  on  Member  clusters  enable  customer  self-­‐service  of  new   databases  without  overheads  of  infrastructure  management  on  each  cluster   •  Organisa@onal  implica@ons:   –  Infrastructure  Team  to  manage  Cluster  Domains   –  Database  Team  to  manage  Member  clusters    
  38. 38. Copyright  ©  2017,  Oracle  and/or  its  affiliates.  All  rights  reserved.    |   Oracle  RAC  Cluster  Domain  Architecture   •  Benefit  from  the  Centralized   Manageability  services     •  Benefit  from  a  centralized  pool  of   consolidated  shared  storage   •  Benefit  from  a  centralized  console  to   provision,  patch,  upgrade   39   The  new  standard  in  consolida@on  
  39. 39. Copyright  ©  2017,  Oracle  and/or  its  affiliates.  All  rights  reserved.    |   40  

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