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

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

Page 1: Oracle RAC 12c Rel. 2 & Cluster Architecture Internals OOW17 by Anil Nair
Page 2: Oracle RAC 12c Rel. 2 & Cluster Architecture Internals OOW17 by Anil Nair

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  

Page 3: Oracle RAC 12c Rel. 2 & Cluster Architecture Internals OOW17 by Anil Nair

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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.  

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Program  Agenda  

Cluster  Domain  Architecture  

Member  Cluster  use  cases  

BT  –  Cluster  Domains  in  AcRon  

     

1  

2  

4  

3  

Page 5: Oracle RAC 12c Rel. 2 & Cluster Architecture Internals OOW17 by Anil Nair

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Program  Agenda  

Cluster  Domain  Architecture  

Member  Cluster  use  cases  

BT  –  Cluster  Domains  in  AcRon  

     

1  

2  

5  

3  

Page 6: Oracle RAC 12c Rel. 2 & Cluster Architecture Internals OOW17 by Anil Nair

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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  

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Centralized  Management  for  Cluster  Estates  “too  big  to  manage”  otherwise  

Page 7: Oracle RAC 12c Rel. 2 & Cluster Architecture Internals OOW17 by Anil Nair

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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  

Page 8: Oracle RAC 12c Rel. 2 & Cluster Architecture Internals OOW17 by Anil Nair

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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)  

Page 9: Oracle RAC 12c Rel. 2 & Cluster Architecture Internals OOW17 by Anil Nair

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Domain  Services  Cluster  (DSC)  

IO  Service  

ASM  Service  

Shared  ASM  

ACFS  Service  

RHP  Service  

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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  

Page 10: Oracle RAC 12c Rel. 2 & Cluster Architecture Internals OOW17 by Anil Nair

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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    

Page 11: Oracle RAC 12c Rel. 2 & Cluster Architecture Internals OOW17 by Anil Nair

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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  

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

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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.  

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Never  take  down  a  database  instance  to  patch  Grid  Infrastructure  

Page 13: Oracle RAC 12c Rel. 2 & Cluster Architecture Internals OOW17 by Anil Nair

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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)  

Page 14: Oracle RAC 12c Rel. 2 & Cluster Architecture Internals OOW17 by Anil Nair

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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  

Page 15: Oracle RAC 12c Rel. 2 & Cluster Architecture Internals OOW17 by Anil Nair

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• 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  

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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  

Page 16: Oracle RAC 12c Rel. 2 & Cluster Architecture Internals OOW17 by Anil Nair

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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'.  

Page 17: Oracle RAC 12c Rel. 2 & Cluster Architecture Internals OOW17 by Anil Nair

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•  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  

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Convert  a  Standalone  Cluster  to  Member  Cluster  

Convert  

Database  Member  Cluster  

Uses  local  ASM  

Page 18: Oracle RAC 12c Rel. 2 & Cluster Architecture Internals OOW17 by Anil Nair

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Program  Agenda  

Cluster  Domain  Architecture  

Member  Cluster  use  cases  

BT  –  Cluster  Domains  in  AcRon  

     

1  

2  

18  

3  

Page 19: Oracle RAC 12c Rel. 2 & Cluster Architecture Internals OOW17 by Anil Nair

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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  

Page 20: Oracle RAC 12c Rel. 2 & Cluster Architecture Internals OOW17 by Anil Nair

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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  

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Standalone  isola@on  with  reduced  local  overhead  

Database  Member  Cluster  

Uses  local  ASM  

Page 21: Oracle RAC 12c Rel. 2 & Cluster Architecture Internals OOW17 by Anil Nair

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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  

Page 22: Oracle RAC 12c Rel. 2 & Cluster Architecture Internals OOW17 by Anil Nair

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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  

Page 23: Oracle RAC 12c Rel. 2 & Cluster Architecture Internals OOW17 by Anil Nair

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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  

Page 24: Oracle RAC 12c Rel. 2 & Cluster Architecture Internals OOW17 by Anil Nair

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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    

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Consolida@on  at  its  best  u@lizing  full  resource  sharing    

IO  Service  

ASM  Service  

Page 25: Oracle RAC 12c Rel. 2 & Cluster Architecture Internals OOW17 by Anil Nair

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All  Deployments  Benefit  from  Oracle  RAC  Features    

PDB  Isola@on  

Hang  Manager   Choose  the  

“right  path”  

Page 26: Oracle RAC 12c Rel. 2 & Cluster Architecture Internals OOW17 by Anil Nair

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101010100001001110010100110111001010011100101001010010010100001111010100101

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  

Page 27: Oracle RAC 12c Rel. 2 & Cluster Architecture Internals OOW17 by Anil Nair

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Database  Member  Cluster  

Uses  ASM  Service  

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Pluggable  Database  and  Service  IsolaRon  

Provides  higher  IsolaRon  in  Member  Cluster  Consolidated  Environments  

Page 28: Oracle RAC 12c Rel. 2 & Cluster Architecture Internals OOW17 by Anil Nair

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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  

Page 29: Oracle RAC 12c Rel. 2 & Cluster Architecture Internals OOW17 by Anil Nair

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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

Page 30: Oracle RAC 12c Rel. 2 & Cluster Architecture Internals OOW17 by Anil Nair

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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  

Page 31: Oracle RAC 12c Rel. 2 & Cluster Architecture Internals OOW17 by Anil Nair

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Database  Member  Cluster  

Uses  ASM  Service  

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The  “Right  Path”  Ensures  Performance  on  Member  Clusters  

EffecRvely  reducing  the  impact  of  compeRng  workloads  overwhelming  the  I/O  on  the  DSC  

Busy

Page 32: Oracle RAC 12c Rel. 2 & Cluster Architecture Internals OOW17 by Anil Nair

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Program  Agenda  

Cluster  Domain  Architecture  

Member  Cluster  use  cases  

BT  –  Cluster  Domains  in  AcRon  

     

1  

2  

32  

3  

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BT:    Cluster  Domains  in  AcRon  Dave  Hickson  –  Database  Architect  BT  October  3,  2017  

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©  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  

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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  

 

 

 

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©  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  

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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    

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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  

 

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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  

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The  new  standard  in  consolida@on  

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