Production RAC DBA activities...

Hi,
I have been working as production dba since last 4-5 years(single instance). Now got oppourtinuty to administer production RAC environment. Could any of you please suggest me what are the general Production RAC DBA activities would involve?
Thanks in advance!!!
Regards,
Vikram Kale

In fact the tasks are basically the same : there is still one database, but access by many instances.
Instances communicate through an INTERCONNECT to maintain a 'global cache' (cache fusion algorithm used to maintain coherency an consistence between instances). All RAC specific 'problems' come from this cache coordination against all the nodes in the cluster.
Another specific point is that data must be stored on shared disk/cluster file system, to allow data to be share between instances and allow datafiles to be accessed concurrently. And that's where ASM becomes really interesting.
I think to understand RAC, you need to read two manuals not up to date : the OPS concepts guide (8i) and the RAC concept guide (9i) available free on otn. Indeed, there is no more a concept guide for rac in 10g release ...
Good luck.
Marc

Similar Messages

  • Solutions for access as ROOT for RAC DBA duties

    Our Networking Team and Applications Team are going through some growing pains. We are trying to resolve what permissions should be given to a RAC DBA. Our RAC DBA is responsible for Oracle Clusterware, Oracle Automatic Storage
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    Oracle ASM 11.2.0.2
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    Oracle Enterprise Linux 5 update 2
    Oracle ASM 11.2.0.2 -- Grid Infrastructure
    Oracle Database 11.2.0.2 EE
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    cluvfy
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    - some cluvfy commands under 11gr1 would only run properly for -post cfs check as ROOT in our last installation
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    /etc/sysconfig/oracleasm
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    /usr/sbin/asmtool
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    asm cluster file system
    - some commands require ROOT (mounting etc.)
    - acfsutil
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    - loading errors ohas and oracleasm would be logged here
    cvuqdisk
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    root.sh
    - script needed to run at install, upgrades and patching
    oraInstRoot.sh
    - script needed to run at install
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    roothas.pl
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    srvctl
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    What solutions have people found so that RAC DBA can perform responsibilites yet not have ROOT password?

    In all the environments I've worked in, I either had direct su access with knowledge of the root password or used sudo. I really can't imagine an environment that would require something other than either of those two options.
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    Is SUDO the only solutuion? Every command need to be entered into SUDO config files that necessitates ROOT access.
    As I demonstrated in the other thread, giving the oracle user sudo access to files that are writable by the oracle user (eg. root.sh) gives them the ability to access to a root shell. It is good to implement a "minimum privileges necessary" policy in your organization but it has to be within reason. The minimum privilege necessary for running and maintaining CRS is root.
    Edited by: AllYourDataBase on Apr 18, 2011 1:44 PM

  • Tasks that require ROOT for RAC DBA

    Our Networking Team and Applications Team are going through some growing pains. We are trying to resolve what permissions should be given to a RAC DBA. Our RAC DBA is responsible for Oracle Clusterware, Oracle Automatic Storage
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    Production and Test (RAC)
    Oracle Enterprise Linux 5 update 2
    Oracle Clusterware 11.2.0.2 -- Grid Infrastructure
    Oracle ASM 11.2.0.2
    Oracle Database 11.2.0.2 EE
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    Oracle Enterprise Linux 5 update 2
    Oracle ASM 11.2.0.2 -- Grid Infrastructure
    Oracle Database 11.2.0.2 EE
    As the RAC DBA, I have identified the following areas that require ROOT for RAC and Single Instance DB's; however, I understand there may be more:
    diagcollection.pl
    - diagnostic tool for Oracle Clusterware and may be requested by Oracle Support
    ocrconfig
    - to repair ocr configuration issue (add, replace and remove requires root)
    srvctl modify
    - required root to change ip address
    tar
    - TAR Grid Infrastructure Directory structure preserving files with ROOT ownership
    cluvfy
    - cluvfy fix it scripts need to run as ROOT
    - some cluvfy commands under 11gr1 would only run properly for -post cfs check as ROOT in our last installation
    ASM Libraries
    - ROOT required to install and configure ASM libraries
    fdisk - l
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    /etc/sysconfig/oracleasm
    - oracleasm loading configuration file
    /usr/sbin/oracleasm
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    /usr/sbin/asmtool
    - asm config tool due to bug
    asm cluster file system
    - some commands require ROOT (mounting etc.)
    - acfsutil
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    - loading errors ohas and oracleasm would be logged here
    cvuqdisk
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    root.sh
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    oraInstRoot.sh
    - script needed to run at install
    rootupgrade.sh
    - upgrade script
    roothas.pl
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    - corrupt check portion requires ROOT
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    ocrconfig
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    - oracle local registry
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    crsctl
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    - set log for dynamic debugging
    - check install periodically
    srvctl
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    I'd like to say at the outset that this is a scenario and I am NOT in anyway choosing who does what. A simple -- not so simple -- discussion of roles and responsibilities and associated privileges. If you say that the System Administrator is managing the Grid Infrastructure then this would include all Clusterware and Storage Management (ASM) activities. The System Administrator would manage the OCR and Voting Disks, backups, integrity checks etc. The DBA would then only be responsible for adding the storage within the database itself like assigning tablespaces that reference ASM Disk Groups. This doesn't mean that the DBA can't see the ASM information in the database. The major challenge seems to give your DBA access to the OS, networking and storage tools to preliminarily investigate what they believe to be a OS, networking or storage issue. Without this crossover, your System Administrator may be doing work that is unnecessary. A DBA should have clear understandings of what performance the storage system, cpu, memory and networking should be providing and access to the tools that allow them to understand what side of the fence an issue resides.
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    I agree that there needs to be crossover regarding handling workload and issues. The agreements on roles and responsibilities shouldn't stop the crossover but they should help in understanding who is ultimately responsible for certain areas of the system and application.
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    ARUNKUMAR RAGHAVAN MSc,BEd,PGDMCH,(MBA)
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    Title           :     Asst.technical manager
    Level           :     Junior Executive
    Specialization :     Training & Development
    Function      :     Executive
    Industry      :     Computer / Information
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    Date Joined :     30 Apr 1995
    Date Left      :     06 Jun 1996
    Duties           :     Monitor the day to day
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    STOCK and cash flow position, Meeting executives for Business
    development activities
    Accomplishment :     Joined the Company since August 1994
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    Store, retrieve, and manipulating data               3
    Create PL/SQL blocks of application code               1
    Familiarity with PL/SQL packages                    1
    Familiarity with PL/SQL tables and records          0
    Calling PL/SQL functions from within SQL statements     0
    Building reusable code                         
         0
    Crafting code that automatically adapts to changes     
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         0
    Writing SQL inside PL/SQL programs               
         0
    Reading and writing operating system files          3
    Executing host commands and C programs               0
    Issuing database alerts                         
         1
    Analyzing memory utilization in your session          2
    Debugging and tracing program execution               1
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    Oracle Enterprise Manager Skills:               
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                                  0 = None
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    Administer and monitor Oracle database environments     5
    Oracle Enterprise Manager architecture               3
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    Diagnostic Pack                              
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         0
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    Familiarity with Oracle8 database environments          5
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    Understanding of backup, restore and recovery
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    Oracle8 Recovery Manager                         4
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                                  0 = None
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    Familiarity with Oracle7 Server                    5
    Familiarity with Oracle8 Server                    5
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    Configuring middle tier systems                    0
    Familiarity with Names Server                    
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    Familiarity with Connection Manager               
         3
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    Familiarity with dynamic performance views          4
    Familiarity with initialization parameters          5
    Familiarity with diagnostics and tuning guidelines     3
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    Knowledge of normalization and relational           
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    Tel [home]      :     91-44-2552406
    Tel [office]:     91-44-4839854
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                   thevaram(via), theni(dt), pin
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                   laxminayakan patty,
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    Tel      :     91-4454-54739
    Email     :     [email protected], [email protected]
    Personal Particulars
    Date of Birth           :     05 Aug 1971
    Gender                :     Male
    Nationality           :     India
    Marital Status           :     married
         Permanent Residence of     :      India
              Passport Number          :     T465022
              Valid Upto                    Jan 2005
    EDUCATIONAL QUALIFICATION
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         CLASS & %
    S.S.L.C      TAMILNADU SECONDARY           MAR 1986
         FIRST 85.40
    H.S.C      TAMILNADU HIGER SECONDARY     APR 1988
         FIRST 68.90
    B.Sc           MADURAI KAMARAJ UNIVERSITY      APR 1991
         FIRST 68.63
    (PHYSICS)      VIVEKANANDA COLLEGE
    M.Sc           MADURAI KAMARAJ UNIVERSITY     APR 1994
         FIRST 70.40
    (PHYSICS)
    BEd           MADURAI KAMARAJ UNIVERSITY      NOV 1995
         SECOND 52.20
    TECHNICAL QUALIFICATION
    COURSE           UNIVERSITY/INSTITUTION           Yr.of
    PASSING %
    PGDMCH#           St.JOSEPH'S COLLEGE           JULY
    1995 59.70
                   BHARATHIDASAN UNIVERSITY
    DPCS*           @ DOE & TC.T.S- NCVT TRADE      SEP 1996
    79.47
                   (AICTE^ APPROVED)
    # POST GRADUATE DIPLOMA IN MICROPROCESSOR AND COMPUTER
    HARDWARE
    * DATA PREPARATION AND COMPUTER HARDWARE
    @ DIRECTORATE OF EMPLOYMENT & TRAINING CRAFTSMEN TRAINING
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    ^ ALL INDIA COUNCIL OF TECHNICAL EDUCATION
    PROFESSIONAL
    TRAINING UNDERGONE
    Completed 'ORACLE DBA' Course at RADIANT SOFTWARE PVT LTD,
    WEST MABALAM,
    CHENNAI -33.
    Language Proficiency :
    Languages -          Proficiency (1=worst - 10=best)
                        Spoken               
         Written
    English          5                    6
    Tamil               9               
         9
    Supplementary
    If and when employed by the company
    Willing to Travel               :          yes
    Willing to be Relocated          :          yes
    Possess Own Transport     :          T465022 Valid
    Upto                    Jan 2005
    Expected Monthly Salary          :     
         Negotiable
    Availability               :     
         Immediately
    =================================================================
    ============

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