Oracle RAC Services - DOAG Deutsche ORACLE · PDF fileOracle RAC Services. ... (RAC) 4 RAC...

Copyright ORDIX AG Oracle Real Application Cluster (RAC) 1

Martin HoermannSenior Consultant, ORDIX AG, Münstermh@ordix.de

Deutsche OracleAnwenderkonferenz 2006

Oracle RACServices

Agenda

• Services

- Single Instance Datenbank

- Real Application Cluster

• Client - Connect Time Failover

• Server Side Load Balancing

- Ablauf

- Entscheidungsgrundlage

• Services und Cluster Failover

• srvctl - Das RAC Werkzeug

• AWR, Statspack und Data Dictionary

• Sonstiges & Fazit

RAC DB-Services

Agenda

• Services

- Ablauf

Services - Single Instance

tomahawk = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = srv01)(PORT = 1521)) (CONNECT_DATA = (SERVICE_NAME = winnetou) ))

tnsnames.ora

listener.ora

sqlplus scott/tiger@tomahawk

lsnrctl> services

Dienst "winnetou" hat 1 Instance(s). Instance "APACHE", hat 1 Handler für diesen Dienst...

Services - Single Instance

service_names = winnetouinstance_name = APACHE

listener.ora

lsnrctl> services

Dienst "winnetou" hat 1 Instance(s). Instance "APACHE", hat 1 Handler für diesen Dienst...

pmon & service_names

service_names = winnetou, APACHE.the.west Default = db_unique_name.db_domain

db_unique_name = APACHE Default = db_name

db_name = APACHE

db_domain = the.west

initAPACHE.ora

lsnrctl> services

ALTER SYSTEM REGISTER;

Default: nach 300 Sekunden

LOCAL_LISTENER = shatterhand Default =(ADDRESS=(PROTOCOL=TCP)(HOST=srv01)(PORT=1521))

shatterhand = (DESCRIPTION= (ADDRESS=(PROTOCOL=tcp)(HOST=srv01)(PORT=1521)) )

tnsnames.ora

initAPACHE.ora

lsnrctl> services

Load Profile

Instance Load

Load Profile

LOAD - # Verbindungen für den Service.

MAXLOAD - max # Verbindungen für den Service.

INSTANCE_LOAD - aktuelle Last des Knotens.

INSTANCE_MAXLOAD - maximale Last des Knotens.

Note:75712.1Note:75712.1

Solaris Instance Load: kstat()

für Connection Load Balancing

für Node Load Balancing

Agenda

• Services

- Ablauf

Service Konfiguration

Cluster Ready Service

Cluster Ready Services

APACHE1APACHE1APACHE2APACHE2

APACHE

set service_names set service_names

pmonpmon

Cluster Registry

Remote Listener

APACHE1APACHE1APACHE2APACHE2

pmonpmon

initAPACHE1.ora

REMOTE_LISTENER = LISTENERS_APACHE

LISTENERS_APACHE =(ADDRESS_LIST = (ADDRESS = (PROTOCOL...)(HOST = vip_srv01)(PORT...)) (ADDRESS = (PROTOCOL...)(HOST = vip_srv02)(PORT...)))

tnsnames.ora

Load Profile

Services

lsnrctl> services

Dienst "batch_jobs" hat 1 Instance(s). Instance "rac02", Status READY, hat 1 Handler für diesen Dienst...Dienst "batch_jobs_nur_rac2" hat 1 Instance(s). Instance "rac02", Status READY, hat 1 Handler für diesen Dienst...Dienst "winnetou" hat 2 Instance(s). Instance "rac01", Status READY, hat 2 Handler für diesen Dienst... Instance "rac02", Status READY, hat 1 Handler für diesen Dienst...

• Services auf rac01 (nicht rac02)• Der Listener kennt auch die Services welche seine zugehörige

Instanz momentan nicht bedient.• Warum wird später erläutert!

Agenda

• Services

- Single Instace Datenbank

- Ablauf

Client Side Connect Time Failover

tomahawk = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = vip-srv01)(PORT = 1521)) (ADDRESS = (PROTOCOL = TCP)(HOST = vip-srv02)(PORT = 1521)) (LOAD_BALANCE = yes) (CONNECT_DATA = (SERVICE_NAME = winnetou) ) )

tnsnames.ora

53 % 47 %

sqlplus scott/tiger@tomahawk

Agenda

• Services

- Ablauf

Server Side Load Balancing

CPU Load High CPU Load Low

Services

lsnrctl> services

Dienst "batch_jobs" hat 1 Instance(s). Instance "rac02", Status READY, hat 1 Handler für diesen Dienst...Dienst "batch_jobs_nur_rac2" hat 1 Instance(s). ...

• Services auf rac01 (nicht rac02)• Die Information über Services auf anderen Instanzen ist wichtig für

den Redirect einer Client-Anfrage• Das Load-Profile ist wichtig für die Last-Verteilung

connect

re-direct

LISTENERS_APACHE =(ADDRESS_LIST = (ADDRESS = (PROTOCOL...)(HOST = vip_srv01)(PORT...)) (ADDRESS = (PROTOCOL...)(HOST = vip_srv02)(PORT...)))

tnsnames.ora

re-direct

44connect33connect(redirected)

Achtung: der Client muss jetzt den Serveramen aus dem Parameter remote_listeners auflösen!

connect redirect connect(redirected)

Agenda

• Services

- Ablauf

• Server Side Load Balancing abhängig von zwei Parametern:

• Goal- <NULL>: Default durch dbca, aber nicht dokumentiert- None: Kein Load Balancing Advisor- Service Time: Advisor berechnet Entscheidung aus Elapsed

Time des Service + Bandbreite- Throughput: Advisor berechnet Entscheidung aus Rate mit der

die Arbeit erledigt wird + Bandbreite

• Connection Load Balancing (clb) Goal- Short: CPU basiert- Long: Connection Count

Connection Load Balancing Goal

GOAL Short Long<NULL> x xNone x x Service Time x xThroughput x x

dbms_service.modify_service( service_name => 'winnetou' - , goal => dbms_service.goal_throughput - , clb_goal => dbms_service.clb_goal_long - );

• dba_services / all_services- goal = { none, service_time, throughput }- clb_goal = { long, short }

Testreihen

• Instanz A: keine Last• Instanz B: 100% CPU Last über Service• mit jedem Schritt werden 8 Verbindungen aufgebaut

clb_goal = long

goal = service_time A) 4 8 12 16B) 4 8 12 16

A) 3 8 12 20 28B) 5 8 12 12 12

A) 4 12 20 36B) 4 4 4 4

goal = throughput

clb_goal = short

A) 4 8 12 16B) 4 8 12 16

Agenda

• Services- Single Instance Datenbank- Real Application Cluster

• Client - Connect Time Failover• Server Side Load Balancing

- Ablauf- Entscheidungsgrundlage

• Services und Cluster Failover• srvctl - Das RAC Werkzeug• AWR, Statspack und Data Dictionary• Sonstiges & Fazit

oracle> crs_stat

NAME TYPE TARGET STATE HOST ora.rac0.rac_b1_b2.cs application ONLINE ONLINE suse200ora.rac0.rac_b1_b2.rac01.srv application ONLINE ONLINE suse200ora.rac0.rac_b1_b2.rac02.srv application ONLINE ONLINE suse220

oracle> crs_stat

NAME TYPE TARGET STATE HOST ora.rac0.rac_b1_b2.cs application ONLINE ONLINE suse200ora.rac0.rac_b1_b2.rac01.srv application ONLINE ONLINE suse200ora.rac0.rac_b1_b2.rac02.srv application ONLINE OFFLINE suse220

oracle> crs_stat

NAME TYPE TARGET STATE HOST ora.rac0.rac_b1_v2.cs application ONLINE ONLINE suse200ora.rac0.rac_b1_v2.rac01.srv application ONLINE ONLINE suse200

oracle> crs_stat

NAME TYPE TARGET STATE HOST ora.rac0.rac_b1_v2.cs application ONLINE ONLINE suse200ora.rac0.rac_b1_v2.rac01.srv application ONLINE ONLINE suse220

Ein automatische "Fall Back" findet nicht statt!

metalink.oracle.com

Configuration of Load Balancing and Transparent Application Failover

Note:226880.1

Configuration of Load Balancing and Transparent Application Failover

Note:226880.1

testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen ten testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen testen tes

Agenda

• Services

- Ablauf

srvctl

Hinzufügen eines Servicesrvctl add service -d <db_unique_name> -s <service_name> -r <preferred_list> [-a <available_list>] [-P <TAF_policy>]

Starten und Stoppen von Servicessrvctl start service -d <name [-s <service_name_list>] [-i <inst_name>] [-o <start_options>] [-c <connect_str> | -q]

srvctl

Aktivierung und Deaktivierung von Servicessrvctl enable|disable service -d <db_name -s <service_name1,service_name2,...> [-i <inst_name1,inst_name2,...>]

Relocating von Servicessrvctl relocate service -d rac0 -s winnetou -i rac01 -t rac02

Status eines Servicessrvctl status service -d rac0 -s winnetou [-f] [-v]

Agenda

• Services

- Ablauf

AWR Informationen

Data Dictionary

• dba_services / all_services- goal = { none, service_time, throughput }- clb_goal = { long, short }

• v$services, v$active_services

• v$service_events, v$service_stats- Wait Events und Statistiken je Service

• v$service_wait_class, v$service_metric ...- Klassifizierung von Wait Events und Statistiken (10g)

Agenda

• RAC DB-Services

- Ablauf

Dokumentation

• Oracle Clusterware and RAC Administration and Deployment Guide- Kapitel 6 Introduction to Workload Management- Kapitel 14 Making Applications Highly Available ...- Anhang E Server Control Utility Reference

• Net Services Administrator's Guide- Kapitel 10 Configuring and Administering the Listener- Kapitel 13 Enabling Advanced Features of Oracle Net Services

• PL/SQL Packages and Types Reference- Kapitel 95 DBMS_SERVICE

• Reference (Diverse dba, v$ Views)

Interessante Notes

• Issues affecting Automatic Service RegistrationNote:235562.1

• Connection and Node Load Balancing with MTS (Shared Server)Note:75712.1

• Configuration of Load Balancing and Transparent Application FailoverNote:226880.1

• Ein RAC System- mit Services- mit Client Side Load-Balancing- mit Server Side Load-Balancing- mit Transparent Application Failover

• ist mit den Assistenten einfach zu konfigurieren- aber aufwendig zu testen- und sehr sehr sehr komplex!

... und jetzt stellen wir uns das ganze auf einem 4 Knoten Cluster vor!

Auf Wiedersehen

Danke für die Aufmerksamkeit,mögen sich unsere Wege wieder kreuzen ...

... vielleicht auf der Konferenz an unserem Stand C11 gegenüber von

Oracle RAC Services - DOAG Deutsche ORACLE · PDF fileOracle RAC Services. ... (RAC) 4 RAC...

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