Nagendra Kumar Senior Software Engineer, Emerson Network Power, Embedded Computing. June 3 rd, 2009

Transcription

1 SI-SI Dependency Nagendra Kumar Senior Software Engineer, Emerson Network Power, Embedded Computing. June 3 rd,

2 Presentation Outline Introduction of SI-SI Dependency Feature Examples Explored Tips Telecast Configuration Concepts References 2

3 Presentation Outline Introduction of SI-SI Dependency Feature Examples Explored Tips Telecast Configuration Concepts References 3

4 Introduction of SI-SI Dependency Feature When Introduced? Implemented in OpenSAF release. AMF Feature compliance with B

5 Introduction of SI-SI Dependency Feature What is it? One Service Instance (SI) can depend on another Service Instance (SI) Depend for what? For getting ACTIVE assignment. Not for getting STANDBY assignment. 5

6 Introduction of SI-SI Dependency Feature Few Terminologies: If SI1 depend upon SI2, then SI1 is called Dependent SI and SI2 is called Sponsor SI. SI is Assigned means: It has either of ACTIVE or QUIESCING assignment for at least an SU. SI is Unassigned means: It has either QUIESCED or STANDBY HA State or doesn t have HA state assigned. 6

7 Introduction of SI-SI Dependency Feature Administrative Unlock ACTIVE SU1 Sponsor SI Administrative Lock SU2 STDBY Tolerance Tolerance Timer Timer Running Expired Depends on ACTIVE SU3 Dependent SI SU4 STDBY SU1 and SU2 Belong to SG1 2N Red SU3 and SU4 Belong to SG2 2N Red 7

8 Introduction of SI-SI Dependency Feature Few Points: 1. Dependent SI and Sponsor SI can belong to same/different Service Group. 2. Service Group may be across different nodes. Means SI-SI dependency across cluster. 8

9 Introduction of SI-SI Dependency Feature Few Points Contd : Beyond Cluster also supported?? 1. SI of a cluster SG. 2. SI of an External SU s SG. Means SI-SI Dependency can be configured between Cluster SG and External SU s SG. Not for SIs across two clusters. 9

10 Introduction of SI-SI Dependency Feature Few Points Contd : A dependent SI can depend upon more than one Sponsor SI. Sponsor SI 1 Dependent SI 1 Sponsor SI 2 10

11 Introduction of SI-SI Dependency Feature Few Points Contd : A Sponsor SI can sponsor more than one Dependent SI. Sponsor SI 1 Dependent SI 1 Dependent SI 2 There should not be any Cyclic Dependency. 11

12 Introduction of SI-SI Dependency Feature Cyclic Dependency: SI1 depends on SI2. SI2 depends on SI1. SI1 SI2 12

13 Introduction of SI-SI Dependency Feature Cyclic Dependency contd. : AMF can detect cyclic dependency configuration. Cyclic dependency configuration will be rejected. 13

14 Presentation Outline Introduction of SI-SI Dependency Feature Examples Explored Tips Telecast Configuration Concepts References 14

15 Examples Explored DHCP : Module1: Holds IP address pool. Module2: Gets IP addresses from Module1 and sends back to Clients. Module2 depends on Module1. If Module1 SI is removed, Module2 SI should also be removed. 15

16 Presentation Outline Introduction of SI-SI Dependency Feature Examples Explored Tips Telecast Configuration Concepts References 16

17 Tips Telecast Few Tips: Keep in mind, SI Ξ Work Load Configure SI-SI Dependency based on Work Dependency. Configure SI-SI Dependency based on Work flow. 17

18 Tips Telecast Few Tips Contd : Configure SI-SI Dependency based on Work Dependency. Work 2 Depends on Work 1 Work 1 Work 2 18

19 Tips Telecast Few Tips Contd : Configure SI-SI Dependency based on Work flow. Work 2 Depends on Work 1 Work 3 Depends on Work 2 Work 1 Work 2 Work 3 19

20 Presentation Outline Introduction of SI-SI Dependency Feature Examples Explored Tips Telecast Configuration Concepts References 20

21 Configuration Concepts AMF Configuration Interfaces: Two Options: Static Configuration: AppConfig.xml/NCSSystemBOM.xml. Dynamic Configuration: Management Interface (SNMP, CLI). 21

22 Configuration Concepts Option 1: Static Configuration Configuration Attributes : <SIInstance name="safsi=si_dependent"> <SIDepList> <SIDep name="safsi=si_sponsor" toltime="500000" /> </SIDepList> </SIInstance> 22

23 Configuration Concepts Option 1: Dynamic Configuration Configuration Attributes (SAF-AMF-MIB): SaAmfSISIDepTableEntry ::= SEQUENCE { saamfsisidepsiname SnmpAdminString, saamfsisidepdepndsiname SnmpAdminString, saamfsisideptoltime SafTimeStamp, saamfsisideprowstatus RowStatus } 23

24 Presentation Outline Introduction of SI-SI Dependency Feature Examples Explored Tips Telecast Configuration Concepts References 24

25 References SAF AIS Application Management Framework Specifications (SAI-AIS- AMF-B.01.01) OpenSAF Availability Service Release 3 Programmer's Reference. 25

26 Questions?

27 Thank You! For queries, please post it to User mailing List Nagendra Kumar