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
Management and Oracle RDBMS software. The OS, Server and Storage Subsystem are the responsibility of the System Administrator. We have the following Environment:
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
Development (Single Instance)
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
- this is used to see disks attached which is relevant when ASM disks are not mounted
/etc/sysconfig/oracleasm
- oracleasm loading configuration file
/usr/sbin/oracleasm
- to make disks available to ASMLIB (scandisks etc.)
/usr/sbin/asmtool
- asm config tool due to bug
asm cluster file system
- some commands require ROOT (mounting etc.)
- acfsutil
/var/log/messages
- loading errors ohas and oracleasm would be logged here
cvuqdisk
- needs to be loaded for new install
root.sh
- script needed to run at install, upgrades and patching
oraInstRoot.sh
- script needed to run at install
rootupgrade.sh
- upgrade script
roothas.pl
- upgrade script
ocrcheck
- check for ocr corruption
- corrupt check portion requires ROOT
- oracle local registry
Grid Infrstructure
- .runInstaller from Grid Infrastructure
- includes upgrades
asm configuration assistant (asmca)
- configuration of asm diskgroups
- vol mgr for asm disks
ocrconfig
- ocr configuration tool
- ocr import
- ocr export
- oracle local registry
ocrdump
- used to check ocr backup file
- oracle local registry
opatch
- patching grid control requires ROOT
crsctl
- Startup and Shutdown Oracle Clusterware, Oracle ASM and Database/Instance
- restore voting disk
- restore ocr
- set log for dynamic debugging
- check install periodically
srvctl
- modify nodeapps (ex. ip address change)
- add filesystem (acfs)
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.
In places with stricter auditing requirements we used sudo in conjunction with the sudosh shell wrapper to log all activities to syslog, but this was used by everyone and not just the DBA
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
Management and Oracle RDBMS software. The OS, Server and Storage Subsystem are the responsibility of the System Administrator. We have the following Environment:
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
Development (Single Instance)
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
- this is used to see disks attached which is relevant when ASM disks are not mounted
/etc/sysconfig/oracleasm
- oracleasm loading configuration file
/usr/sbin/oracleasm
- to make disks available to ASMLIB (scandisks etc.)
/usr/sbin/asmtool
- asm config tool due to bug
asm cluster file system
- some commands require ROOT (mounting etc.)
- acfsutil
/var/log/messages
- loading errors ohas and oracleasm would be logged here
cvuqdisk
- needs to be loaded for new install
root.sh
- script needed to run at install, upgrades and patching
oraInstRoot.sh
- script needed to run at install
rootupgrade.sh
- upgrade script
roothas.pl
- upgrade script
ocrcheck
- check for ocr corruption
- corrupt check portion requires ROOT
- oracle local registry
Grid Infrstructure
- .runInstaller from Grid Infrastructure
- includes upgrades
asm configuration assistant (asmca)
- configuration of asm diskgroups
- vol mgr for asm disks
ocrconfig
- ocr configuration tool
- ocr import
- ocr export
- oracle local registry
ocrdump
- used to check ocr backup file
- oracle local registry
opatch
- patching grid control requires ROOT
crsctl
- Startup and Shutdown Oracle Clusterware, Oracle ASM and Database/Instance
- restore voting disk
- restore ocr
- set log for dynamic debugging
- check install periodically
srvctl
- modify nodeapps (ex. ip address change)
- add filesystem (acfs)
What other items would a RAC DBA need to have ROOT access for?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.
There seem to be choices for an organization.
1) Is there a position called RAC DBA or is the RAC portion managed by the System Administrator.
2) If a RAC DBA exists then what should the System Administrator be responsible for
3) What access is need for an existing RAC DBA?
4) How will access privileges be given to the RAC DBA?
5) other considerations regarding security?
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.
If this isn't happening at organizations then how is it handled? or not handled? -
What are the RAC DBA daily tasks?
Hello Experts,
What are the RAC DBA daily(routine) tasks?
Thank you.Hi Friend,
Good Query..
1. Make sure that all database instances are available.
Log into each instance and run daily
2. Checking CRS status
bash-3.00$ ./crs_stat -t
3. Checking Volumes Informations in each instances.
bash-3.00$ df –h
4. Verify success of database backup:
a. RMAN backup/Data Pump Backup/Cold backup
5. Check the Archive Log file locations in each instance
6. Check the Archive Log file location volume sizes in each instance
7. Check Alert Log files (Any ORA_600, oRA_07445 etc..) in each instance
8. Check the Statspack / AWR Report Peak hour reports
9. Check the ASM INSTANCE status in each instance
10. Check disk groups space and limitation
11. Always use EM and ADDM reports for performance health checks and analysis
12. verify the DR sync (if applicable):
13. If DR site is available :
a. Check to determine if latest archive logs have been applied to the database by looking at the alert
log file for the standby(DR) database.
14. Review contention for CPU, memory, network or disk resources:
a. Work with system administrators to develop methods to review contention for these resources.
15. Maintain Complete Database Details (Data Files locations, Control file locations, Redo Log file Locations etc...)
a. If any changes in production database or DR-Site database update manuals.
16. Check OCR and VD backup locations. (If possible take manually OCR and VD backup)
17. Check CRS logs in each instance
18. Check Listener Logs in each instance
19. If you are using RMAN backup, Use both the instances while taking RMAN backup (Multiple Channel allocations in Instances)
20. Weekly restore the RAC backup in Single Instance Database (If RAC setup is not available)
Hope it helps....
Thanks
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v. Describe the purpose of using services with RAC
RAC Installation and Configuration Part I
i. Outline Oracle 10g RAC Installation
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Automatic Storage Management in RAC
i. Describe Automatic Storage Management (ASM)
ii. Install the ASM software
iii. Set up initialization parameter files for ASM
And database instances
iv. Start and shut down ASM instances
Administering Redo, Undo and Services
I. Managing redo log groups in a RAC environment
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iv. Dealing with the ocr and voting disk
Different Ways of making connection in RAC
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Restriction for objects Products, BPs and Activities
How experts,
I have the following objects Products, BPs and Activities which I have to restrict the access to be visualize. For example, a user that belongs to another Org.Unit can not see the BPs, Produtct,Activities from the other Org.Unit.
1. How can I structure the solution to restrict group of users to visualize those objects ?
2. Each of these objects should I have to assign the Org.Unit allowed to be displayed ?
3. For BP, territory management is the best solution ?
Best regards,Hi
U can restrict and make display etc in creating/modifying the roles and authorizations
go to Tcode PFCG, select ur role and do necessary settings there according to ur requirement.
Rewardif helps
Regards
Manohar -
Production RAC with ASM and DR with non-rac and ASM
Hi,
I have a question whether this configuration is feasible or not. Production environment is 10gR2 RAC running on 2 node cluster. DR site will have single instance with ASM. Disks from primary site will be mirrored to DR site using EMC SRDF. Would i be able to bring up single instance at DR site on mirrored ASM disks once split is done? Currently not incorporating Dataguard for DR solution.
Wanted to check if anyone has done like this before.
ThanksThis is feasible. SRDF is capable of providing data at the DR site that is always in a "crash-consistent state", without doing anything at the production site RAC environment. Starting the database at the DR site will cause it to run crash recovery first. SRDF synchronous or asynchronous feature should be used in this case.
At the DR site, your default OS devices files could be different. Either change the asm disk strings or configure the device files for the disks such that they are the same as the shared device files at production side. This way, you can use the ASM configuration as is.
Also the database is to be started in a non-cluster mode, by commenting the cluster related parameters (ie: cluster) at the init*.ora parameter file. -
I am looking for some one who can teach EMC storage administration to a oracle RAC dba
Now, I'm not saying starting from a blank piece paper, now that clusterware has matured a bit, with no other limitations, I would choose to have veritas in the mix as well.
However, there are situations where whether for coporate standards, or maybe even legacy reasons (perhaps, though I don't think it's a good idea, some other application is running there clustered with veritas).
My point, was that it could be done - hey choice is good, right?
But yes, Veritas/symantec must have been well miffed when they heard that Oracle were going to write their own clusterware.
regards,
jason.
http://jarneil.wordpress.com -
SAP BW Production Clean Up Activities
Hi Friends !
We are planning to perform clean up of SAP BW Prod. The motto is to free the space & delete all un-used objects. Few things to be considered :
1) PSA deletion - Do we have any Tcode which gives the entire list of PSA? Then we can build a Process Chain & run weekly.
2) List of unused queries which is not used since Jan 2011 (I guess we can create a query with the stats cube) - Need to find the details.
3) List of unused objects - Once we get the unused query names, we can delete its dependent objects. Correct?
4) Need to find out latest users & query which they are using
5) Send communication to all the BW users
6) Chek the RSMO & find which all data loads are happening daily...weekly...montly.
Please add more in the list. Thanks.
With Regards
RekhaHi...
One more thing I can suggest you.......
You can archive the old data of the infocube and ODS.......it will also free the memory space and will improve the performance...
You can retrieve these archived data in future if required.....
You can archive the data using the tcode : SARA
Check the below document :
http://www.sdn.sap.com/irj/scn/index?rid=/library/uuid/a0974515-7225-2b10-14a1-f5abba35b19f
http://www.sdn.sap.com/irj/scn/index?rid=/library/uuid/d0b17bcc-8056-2c10-9cb5-91680acee9c7
Regards,
Debjani..... -
DBA Checklist for Daily activities
Hi Experts,
Tomorrow i am having interview in MNC company in india,now i am working in Indian based product company.I am expecting tomo first question is Roles and Responsibilities of DBA in daily and weekly.
As i am in product based company with I am not much aware of MNC DBA. How to tackle this question.
if you dont mind can you list our major daily and weekly work of DBA's it will helpful for me tomo.
pls
Thanks
SelvaThey wont judge you if you wont answer roles and responsibility question correctly this question has meaning to guage how much you are aware with technical activities and did you actually do that or not. Concentrate on your technical knowledge rather.
You could refer to Checklist but answer is DBA checklist varies and so does DBA profile. Instead of referring to cheklist jot down daily task you do no matter howsoever simple dont fake in an interview tell them truth they want your knowledge not DBA activities.
Please mark this reply as answer if it solved your issue or vote as helpful if it helped so that other forum members can benefit from it.
My TechNet Wiki Articles -
RAC Production Comprehensive Check List
Dear RAC Gurus,
I am putting together a daily health check list for a 4-node production RAC cluster hosting a multi terra-byte database. I would like to know if any of you have put together such list and can share your thoughts on it and what to include in the list.
Please respond with your suggestions and advice.
MadhuLeverage DB Console or Grid Control, create a performance baseline, and create alerts for the exceptions to that baseline (within an acceptable boundary).
CPU utilization per node and overall
CPU queue size
IOPS and throughput per node and overall.
Response time for business critical queries
Interconnect error rate
Latency (interconnect and I/O)
Interconnect I/O rate
Space utilization
TEMP space utilization and incidents
UNDO space incidents
Concurrent sessions
Usable FRA
Services incidents
Cluster incidents -
Application for the post of an ORACLE DBA
=================================================================
============
ARUNKUMAR RAGHAVAN MSc,BEd,PGDMCH,(MBA)
=================================================================
============
CURRICULUM VITAE
Covering letter
From
Arunkumar.R, email : [email protected],
[email protected]
No 16 /9 Nagendra nagar,
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Near jaya hospital,
Chennai -600 042.
Respected Sir / Madam,
SUB : Application for the post of
ORACLE DBA / DBO - Reg
I wish to submit the following few lines for your kind
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Expecting the favour of your earliest reply.
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CAREER OBJECTIVE
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Experience summary
q Five years and six months of overall experience in
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q Over 24 months of work experience in the administering,
and maintaining the Oracle Database of sizes 3 GB
q Training and authoring books, CBT’s,WBT’s for Oracle DBA
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Hardware IBM PC, MAC
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Internet Tools HTML, IIS, FrontPage
Responsibilities at PENTAMEDIA GRAPHICS LTD,
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4 COMPANY )
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Oracle 8.0,
ORACLE 8i,) and application tools.
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1. CBT's and WBT's authored (Reference:
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Under Production
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=================================================================
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Employment History
1. Company Name : Pentamedia
Graphics ltd
Title : instructional designer
Level : Senior Executive
Specialization : IT/Computer Systems/Software
Function : Professional /
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Industry : Computer / Information
Technology (Software)
Date Joined : 12 oct 1999
Duties : Responsible for CBT’s,
WBT’s on DATA
WAREHOUSING & ORACLE DBA.
project guide for TEAM
members.
Developed 5 training
software.
Maintaining "ORACLE-
PRODUCTION DATABASE"
of size 3GB.
Reason for leaving: working currently
2. Company Name : S.A.International ltd
Title : training officer
Level : Senior Executive
Specialization : IT/Computer Systems/Software
Function : Lecturer / Teacher /
Trainer
Industry : Computer / Information
Technology (Software)
Date Joined : 08 Aug 1997
Date Left : 09 Sep 1999
Duties : At S.A.INTERNATIONAL LTD,(A joint
venture company of ELCOT, GOVT OF TAMILNADU UNDERTAKING)
Responsible for all training programmes.
Project guide
for all college students.
Senior Faculty
for "ORACLE DBA" classes.
Accomplishment : Wrote student guides on office
2000 and on ORACLE DBA
Developed 3 training
software.
Reason for
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MAINTENANCE
3. Company Name : G.K.M.college of
engineering & technology
Title : lecturer
Level : Junior Executive
Specialization : Education
Function : Lecturer / Teacher /
Trainer
Industry : Education
Date Joined : 06 May 1996
Date Left : 09 Aug 1997
Duties : Incharge of computer
science department,
Conducting classes and
all academic
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Accomplishment : Wrote 2 student guides on office
1997 and on
ORACLE DBA.
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Activities
4. Company Name : Infra computers pvt ltd
Title : Asst.technical manager
Level : Junior Executive
Specialization : Training & Development
Function : Executive
Industry : Computer / Information
Technology
Date Joined : 30 Apr 1995
Date Left : 06 Jun 1996
Duties : Monitor the day to day
operations of the
SOFTWARE/HARDWARE SERVICE DEPARTMENT. Monitor the DEPARTMENT
STOCK and cash flow position, Meeting executives for Business
development activities
Accomplishment : Joined the Company since August 1994
as Asst TECHNICAL MANAGER. Promoted to TECHNICAL MANAGER in july
1996.
Reason for
leaving : To study M.B.A
(master business
Administration)
ORACLE DBA SKILLS SELF EVALUATION FORM
Oracle: SQL and PL/SQL Skills:
rate
from
0 = None
through 5 = Guru
Creating and maintaining database objects 3
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
in data structures
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
Manipulating raw data and large objects 1
Building your own packages
1
Oracle Enterprise Manager Skills:
rate
from
0 = None
through 5 = Guru
Install Oracle Enterprise Manager 5
Administer and monitor Oracle database environments 5
Oracle Enterprise Manager architecture 3
Setup a console for your own environment 3
Implement job and event based system management 3
Understand the integration of shared administrator
responsibilities
3
Tuning Pack
1
(which comprise Oracle Expert, Tablespace Manager
and SQL Analyze)
Diagnostic Pack
0
(which comprise Oracle Trace and Data Viewer,
Performance Manager,
Capacity Planner,and Top Sessions)
Change Management Pack
0
(which comprise Database Alter, Capture, Diff,
Propagate, Quick Change, and Plan Manager)
Database Administration/ Backup and Recovery Skills:
rate
from
0 = None
through 5 = Guru
Familiarity with Oracle7 database environments 5
Familiarity with Oracle8 database environments 5
Set up, maintain, and troubleshoot database 4
Plan and implement database backup and recovery
strategies
4
Understanding of backup, restore and recovery
operations
4
Oracle8 Recovery Manager 4
Network Administration Skills:
rate from
0 = None
through 5 = Guru
Familiarity with Oracle7 Server 5
Familiarity with Oracle8 Server 5
Familiarity with architecture of Net8 4
Establishing connections between peers 5
Client and a server node using various
naming methods
4
Configuring middle tier systems 0
Familiarity with Names Server
1
Familiarity with Connection Manager
3
Memory, I/O, physical structure and
resource contention 2
Familiarity with dynamic performance views 4
Familiarity with initialization parameters 5
Familiarity with diagnostics and tuning guidelines 3
Data Modeling and Relational Database Design Skills:
Arun's
rate from
0 = None
through 5 = Guru
Knowledge with entity-relationship models 2
Knowledge of normalization and relational
database design
1
Defining business information requirements 3
Creating entity-relationship models
3
Transforming requirements into an initial
database designs
3
Personal Strengths :
INVOLVEMENT alone gives PERFORMANCE. With my
spiritual base &
MOTIVATION, I am confident that I will reach the
pinnacle
in the field of ORACLE DBA. I hope my right thinking &
Hardworking nature will make me successful.
Current Communication Address
Address : 16/9, nagendra nagar, velachery
main road,
near jaya hospital, chennai-42
chennai, 600042 India
Tel [home] : 91-44-2552406
Tel [office]: 91-44-4839854
Tel [mobile]:
Email : [email protected],
[email protected]
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Address : s/o N.Raghavan, laksminayackan
patty(po)
thevaram(via), theni(dt), pin
625530
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625530 India
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
COURSE UNIVERSITY/BOARD Yr.of PASSING
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
SCHEME
^ 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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Select: iTunes Store
Click OK. -
This is a question regarding resetting the user equivalence on clustered hosts. Our company has a 3-node 10.2.0.3 RAC cluster running CRS w/ an ASM system for the DB (Linux64). I just finished rebuilding our Grid Control deployment on a new host (bringing it up to 10.2.0.5) and have been steadily redeploying the agents. The last boxes on the list were those associated with the production RAC cluster. During installation, you have the option to install to all 3 nodes simultaneously from a single node, however when I attempted this, I was informed that password-less ssh communication between the 3 nodes was not available. Not a big problem since I just went through the installs on each box locally and each host and its targets are now reporting to the Grid Control quite well. It even properly detects that the database is clustered.
However, a Grid critical alert continues to inform me that "User equivalence unavailable on all the nodes", and I decided to investigate the possibilities of rectifying this. Initially I tried copying appropriate files out of the ~/.ssh directory to other boxes, but that's when I discovered that the keys had been pass-phrased and neither myself nor the other DBA here know what that pass-phrase is (accurate, centrally managed password management was something I put in place when I arrived to prevent this very thing going forward - thank you KeePass)
My initial thought was to figure out which boxes currently interact with the RAC boxes, and then regenerate the keys per [note 300548.1|300548.1]. Now, I've only been working with RAC for 6 months since I switched jobs, so while I'm getting more comfortable with the tech, there's still a lot I haven't explored thus far, and we don't have a test RAC environment for me to just start trying things (it's in the pipe). The other DBA here has more experience with RAC, but hasn't actually set one up, so neither of us knows for sure what the full ramifications of resetting the keys might be. Could this effect CRS negatively or is it using its own connections through ports on the private network addresses? Aside from non-clustered boxes needing their keys updated, are there any other considerations we should be thinking about?
Thanks!"User equivalence unavailable on all the nodes"After install Oracle RAC and you create phrase key (have password), you'll find it. You can ignore after install Cluster completely
But when you use "cluvfy" or etc... about RAC (dbca/netca)
you have to
$ exec /usr/bin/ssh-agent $SHELL
$ /usr/bin/ssh-add
on metalink 300548.1, they try to told us... create key with no password
$ ssh-keygen -t rsa
Now accept the default location for the key file
Enter and confirm a passphrase. (you can also press enter twice).
$ ssh-keygen -t dsa
Now accept the default location for the key file
Enter and confirm a passphrase. (you can also press enter twice).
So, When we use cluvfy" or etc... (with creating key with no password), we don't run "ssh-agent $SHELL" ...
and I think You'll not find "User equivalence unavailable on all the nodes" as well. -
How we spend a day as a DBA. Explain DBA activities in detail. ?
on production enviromentSorry For just being Off topic
There are different roles for DBAs
Appliccation/Production
I am in Porduction role
1.Monitor the DB Growth
2.Monitor Daily backups
3.Devise new backup strategies
4.Peiodic testing the Backup procedure
5.setting up of Disaster recovery
6.Infratrucutre planning
7.DB server Capacity Planning
8.Change management for DB related objects/Schema....
and so on.. -
RAC RMAN BACKUP Recovery FOR Oracle APPS Application
Hi,
We have an Application which is similar to Oracle APPs application and We have a RAC Database at Backend.
As I am a Oracle RAC DBA and never worked as an Oracle apps DBA.
Each Week or month We have to deploy a patch on Our Database which are kind of sql changes to Database and before we applying we need to backup our Database.
I am very comfortable while applying patches on Single instance Database:-
I Usually shutdown my database and backing up My Database(Conistent\cold Backup) before applying patch.
and I have a Flash back on both option I am having for my Database.
Problem:-
But in Production I have RAC Database, on which I already configured Hot Backup.
FlashBackup Feature is there with me, but Not reliable.
I want cold backup along with my existing hot backup, and want to restore same if something goes wrong.
Since ASM is configured so we have only option RMAN backup.
IF possible kindly Share your knowledge and Experience of your to handle Such Problem.Sir,
RMAN is already configured for backing up database online.
My only intention is to have cold or consistent backup before applying application patch, So that at the time of crisis I will resotre my Cold/Conistent backup.
Because I am using 11gr2 RAC with ASM, so only option is there for me to use rman as backup tool.
But I never tried to Have Cold backup in RAC environment in my previous jobs, and I am new to this Oracle APPS DBA technology. So Here I am looking for a Strategy that Normally oracle apps dba use while applying patch to Oracle Database and kind of backup strategy they use.
Regards
Gaurav
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