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Migrating a database from Oracle 8.0.6 to 10gR2 is a giant step. There had been many enhancements made in the Oracle utility and there will likely subsist some tuning linked to this migration. There are a number of light methods to migrate your database however whatever components you choose, submit inescapable to comprehend adequate time for trying out the migration several times in a non-production ambiance. This comprises checking out the migration, as well as application and practical checking out via your software and commerce champion teams. trying out is never wasted!
a pretty superior source of information is the Oracle Database 10g unlock 2 (10.2) upgrade guide. there is a bit in this usher titled "verify the ameliorate path to the brand modern Oracle Database 10g liberate" which states that in case you want to upgrade your database in location, you ought to fade from 8.0.6 to eight.1.7.4 after which to 10.2. Your other alternate options are to submit utilize of export and import from the current 8.0.6 database to a newly created 10.2 database, or to reproduction the facts the utilize of a database hyperlink. The ameliorate e reserve explains every of these recommendations, but you must select the formulation you are most relaxed with and that matches inside your migration method.
This chapter describes modern and deprecated elements of Oracle Database 10g unlock 2 (10.2) for windows and offers pointers to additional information. It additionally retains modern and deprecated features counsel from traditional releases to champion those users migrating to the current unlock.
here sections recount the modern points in Oracle Database:
Oracle Database modern features for the listing of modern points, alternate options, and enhancements of Oracle Database
The README file at the root even of the documentation media for more assistance about the Oracle Documentation Library
Oracle Database usher on home windows Vista
Oracle Database is supported on home windows Vista with the ten.2.0.3 free up. utilize the Oracle Database 10g unencumber 2 (10.2.0.3) for Microsoft home windows Vista media accessible in the 10.2.0.three media pack and the Oracle technology community web site. carry out not installation Oracle Database on home windows Vista the usage of the media for Oracle Database 10g liberate 2 (10.2) for Microsoft windows.
.net necessities on windows Vista
To flee Oracle information issuer for .internet on windows Vista, you ought to installation .internet Framework version 1.1.
Oracle Database 10g release 2 (10.2) modern elements for home windows
This share includes this theme:
Oracle facts provider for .net
Oracle records company for .net 10g free up 2 (10.2) has birthright here enhancements:
help for software Context client Identifier
This duty exposes the OracleConnection.ClientId property, which provides champion for Oracle digital inner most Database (VPD) and software context. customer identifier simplifies the digital inner most Database configuration projects.
support for ActiveX records Objects .internet (ADO.internet)
Oracle records issuer for .internet now can steal capabilities of the .internet Framework 1.1 ActiveX information Objects .internet (ADO.web) functionality.
better Connection Pool Administration
This feature gives a way for applications to pellucid connections in one pool or everything pools in an utility area. it might refresh the connections and pellucid the pool of any invalid connections. It too makes it practicable for purposes to spoil the pool everything together.
Database trade Notification
Database change Notification makes it practicable for purposes to acquire notifications on every occasion there has been a transformation in a query outcomes set, schema objects, or the situation of the database. This allows for your applications to retain the validity of the database cache (for instance, Oracle data company for .web core-tier cache, the ADO.web DataSet).
Optimization of Connection Pooling in Oracle amend software Clusters (RAC) and Grid Environments
here modern connection-connected aspects are available with Oracle records company for .web:
The Oracle statistics company for .net connection pool subscribes to notifications that point out no matter if nodes and services can subsist create or unavailable. according to these notifications, the Oracle information issuer for .web connection pool now can free idle connections that had been related to disagreeable nodes and create modern connections to suit ones.
The Oracle statistics issuer for .internet connection pool subscribes to notifications that recount how connections are to subsist divided for a service between different cases in response to percentages. Connections now can too subsist distributed or faraway from the connection pool according to this percentage carrier level.
guide for IN and IN/OUT REF Cursors
This feature permits Oracle information issuer for .web applications to retrieve REF CURSOR objects from a PL/SQL stored procedure or feature and pass them to an additional stored procedure or feature.
LOB efficiency Enhancements
Oracle information issuer for .internet now has the following enhancements for LOB efficiency:
Oracle facts company for .web incorporates your needs extra effortlessly when you should submit a conclusion even if to fetch LOB column records instantly or later. The efficiency for the worst-case scenario acquire been expanded highly.
OracleDataReader methods GetOracleBlob and GetOracleClob are actually supported irrespective of the cost in InitialLOBFetchSize. for this reason, an utility now not has to elect from performance and OracleBlob and OracleClob functionality.
You now can set InitialLOBFetchSize up to 2 GB.
Oracle records provider for .net Developer's e-book
Oracle Database Extensions for .net
Oracle Database Extensions for .web gives the following modern functionality:
a gauge Language Runtime (CLR) host for Oracle Database
records entry via server-aspect Oracle facts provider for .internet courses
A deployment wizard built-in with visual Studio .net
Server-facet Oracle statistics company for .web
Server-side Oracle facts issuer for .internet gives information access from .internet kept tactics and functions. Such techniques and features are enabled by Oracle Database Extensions for .net, a brand modern characteristic covered with Oracle Database on home windows.
Oracle Database hosts the Microsoft habitual Language Runtime (CLR) in an external system, backyard of the Oracle database manner, however on the identical desktop. With the combination of Oracle Database with the Microsoft simple Language Runtime (CLR), applications can flee .internet saved processes on Oracle Database working below home windows 2000, windows 2003, and home windows XP.
Oracle information provider for .net Developer's guide
Oracle Database Extensions for .internet Developer's ebook
PL/SQL programs and kinds Reference
Oracle features for Microsoft Transaction Server
allotted Transactions in an Oracle true utility Clusters (RAC) atmosphere detect screw ups and start the failover and failback tactics automatically.
Oracle Database Oracle Clusterware and Oracle precise software Clusters Administration and Deployment e-book
Oracle services for Microsoft Transaction Server Developer's book
Oracle Cluster competent functions (CRS) identify and functionality trade
beginning with this unlock, Oracle Cluster competent features (CRS) has birthright here alterations:
Its modern identify is Oracle Clusterware.
which you can deploy and utilize Oracle Clusterware while not having to installation Oracle actual application Clusters. as a minimum one server within the cluster exigency to subsist licensed for Oracle Database 10g.
Oracle data issuer for .web modern elements for unencumber 10.1.0.3
New Oracle facts issuer for .internet unlock 10.1.0.three facets are as follows:
right here two modern points extend command cancellation:
The CommandTimeout command cancels the execution of a command when a distinct amount of time elapses after the command executes.
The Cancel formula will too subsist called explicitly by using the software to terminate the execution of a command.
This characteristic offers and manages a cache of PL/SQL statements for each and every session. On the server, it skill that cursors are able to subsist used devoid of the exigency to parse the observation again during that session. you could utilize commentary caching with connection pooling to ameliorate efficiency and scalability.
This components populates the parameter assortment for the OracleCommand code that represents a kept system or characteristic by querying the database for the parameter assistance.
assist for .web 1.1 Enhancements
These enhancements expose modern ADO.net functionality that become brought in Microsoft .internet Framework 1.1.
Oracle information provider for .web Developer's e book
Oracle Database 10g unlock 2 (10.2) Deprecated components
here Oracle Database 10g unlock 2 (10.2) accessories that acquire been share of Oracle Database 10g liberate 1 (10.1) don't seem to subsist obtainable for installation with Oracle Database 10g unlock 2 (10.2):
allotted Computing ambiance (DCE) factor of Oracle superior protection
Microsoft visual C++ 6.0 compiler
Oracle Database 10g release 1 (10.1) modern elements for windows
This district incorporates these issues:
automatic Storage management
automated Storage management allows creation of a unique disk community from a group of particular person disk gadgets.
Oracle Database Administrator's reserve for more tips about automated Storage administration
Database Password Encryption
When a person makes an attempt a remote login to an Oracle Database 10g unlock 2 (10.2) database, the password is automatically encrypted earlier than it is distributed to the far flung database.
records Pump Import and statistics Pump Export
Two modern utilities, records Pump Import and statistics Pump Export, tender sooner transfer of data to and from Oracle databases. The outdated file switch utilities, Import and Export, are retained to subsist used with Oracle databases created with prior models of Oracle utility.
The fleet client characteristic of Oracle convene Interface (OCI) simplifies OCI installing. The activation of immediate client mode is simply stylish on the capability to load the rapid customer records shared library. It requires best two dynamic link libraries to subsist loaded by way of the dynamic loader of the working device.
colossal page help
gigantic web page champion provides a efficiency enhance for memory-intensive database situations operating on windows Server 2003. by taking talents of newly introduced operating system aid, Oracle Database now could submit more effective utilize of processor reminiscence addressing supplies.
Oracle statistics provider for .net
Oracle records company for .web (ODP.web) 10g unencumber 2 (10.2) comprises the following modern features:
guide for Oracle grids
Oracle information issuer for .internet is grid-enabled, permitting builders to steal competencies of Oracle database grid usher without having to submit alterations to their utility code.
guide for modern information forms in the database
Oracle records issuer for .web helps the brand modern database aboriginal types BINARY_FLOAT and BINARY_DOUBLE.
support for assorted Oracle homes
that you would subsist able to deploy Oracle information issuer for .internet in assorted Oracle buildings. To submit assorted homes obtainable, one of the most Oracle facts company for .web files comprehend a edition quantity, and using a HOMEID is required.
support for schema-based XMLType statistics classification in the database
Oracle records provider for .internet helps the aboriginal schema-primarily based XMLType.
Oracle facts company for .internet Developer's guide
Oracle enterprise manager 10g Database control
Oracle commercial enterprise supervisor 10g Database control is installed in the equal Oracle domestic because the database and helps standalone Oracle Containers for Java (OC4J) cases.
Oracle domestic Selector
Oracle domestic Selector is not any longer attainable from the start menu. in its place, utilize Oracle universal Installer, which has performance similar to Oracle home Selector.
Oracle Objects for OLE
Oracle Objects for OLE (OO4O) 10g liberate 2 (10.2) has here modern and updated aspects:
aid for Oracle grids
Oracle Objects for OLE is grid-enabled, allowing developers to steal potential of Oracle database grid usher with no exigency to submit adjustments to their software code.
guide for brand spanking modern information varieties
Oracle Objects for OLE 10g free up 2 (10.2) now gives assist for the BINARY_DOUBLE and BINARY_FLOAT statistics kinds. that you may fetch circumstances of those forms from the database or pass them as input or output variables to SQL statements and PL/SQL blocks, together with kept tactics and capabilities.
support for distinct Oracle buildings
you could install Oracle Objects for OLE in diverse Oracle homes, beginning with Oracle Database 10g liberate 2 (10.2). however, being a COM component, just one instance can too subsist energetic on the computing device. This competence that the present (newest) setting up renders the traditional one inactive.
To submit varied homes available, you should utilize a HOMEID. also, one of the vital Oracle Objects for OLE files consist of a version number.
Oracle Objects for OLE Developer's book
Oracle company for OLE DB
Oracle issuer for OLE DB 10g unencumber 2 (10.2) comprises here modern elements:
aid for Oracle grids
Oracle issuer for OLE DB is grid-enabled, permitting developers to steal skills of Oracle database grid aid with no exigency to submit alterations to their software code.
aid for here facts kinds delivered with Oracle Database 10g free up 2 (10.2):
guide for dissimilar Oracle homes
you could installation Oracle issuer for OLE DB in numerous Oracle homes, starting with Oracle Database 10g unencumber 2 (10.2). however, being a COM part, just one instance may too subsist lively on the computing device. This skill that the latest (newest) setting up renders the traditional one inactive.
To submit diverse buildings attainable, one of the crucial Oracle company for OLE DB data now encompass a version number, and the utilize of a HOMEID is required.
Oracle issuer for OLE DB Developer's guide
This free up includes a modern database scheduler, Oracle Scheduler, to deliver enterprise scheduling performance. you can utilize the OracleJobScheduler provider to beginning external jobs. This service is disabled with the aid of default. to utilize the external jobs functionality, the administrator should set the person identify and password for the person account under which this carrier exigency to run, and then allow the service.
"The Scheduler" in Oracle Database modern points
"Overview of Scheduler ideas" in Oracle Database Administrator's e book
"the utilize of the Scheduler" in Oracle Database Administrator's e-book
"Managing the Scheduler" in Oracle Database Administrator's guide
Oracle features for Microsoft Transaction Server
Oracle functions for Microsoft Transaction Server helps .net transactional functions with Oracle information company for .net during the Oracle issuer for OLE DB, and ODBC.web during the Oracle ODBC driver.
the following add-ons acquire been renamed in this release:
previous callNew nameOracle windows efficiency computer screen
Oracle Counters for home windows performance monitor
Oracle Administration assistant for home windows NT
Oracle Administration assistant for windows
Oracle Database 10g release 1 (10.1) Deprecated accessories
the following Oracle Database 10g unlock 1 (10.1) components that had been a share of Oracle9i release 2 (9.2.0) had been now not accessible for installing with Oracle Database 10g free up 1 (10.1):
REDWOOD SHORES, Calif., may additionally 15 /PRNewswire-FirstCall/ -- Oracle today announced a checklist breaking TPC-H Three Terabyte (TB) benchmark for a database working on the windows working gadget, demonstrating the sophisticated performance of Oracle(R) Database 10g liberate 2 operating on Microsoft home windows and an HP Integrity Superdome Server.(1) With this newest fulfillment, Oracle now holds 9 of the exact 10 efficiency world record benchmark consequences for the TPC-H 3TB scale aspect.(2)
working on an HP Integrity Superdome Server with 16 dual-core Intel Itanium processors on the home windows working equipment, Oracle Database 10g liberate 2 carried out a checklist-breaking efficiency of 37,813.7 [email protected] with a price-performance ratio of $38.00/[email protected] surroundings the fastest consequences for a windows-based apparatus with the TPC-H 3TB benchmark, Oracle's outcome outperformed the outdated most advantageous efficiency outcome by a competitor on windows in both performance and value.(three)
"This benchmark solidifies Oracle's world-class reputation as the database performance leader and is a testament to their persevered dedication to the windows platform," referred to Juan Loaiza, senior vice president, programs expertise, Oracle. "environment the modern TPC-H 3 Terabyte listing for fastest windows-based system is a crucial proof point and further validates why valued clientele depend on the tall performance capabilities of Oracle Database 10g."
as the main database for information warehousing systems, Oracle Database 10g offers a single, integrated database engine for scalable and unreasonable performing database applications. constructing on its historical past of excellence, Oracle holds world statistics in the TPC-H 300GB(four), TPC-H One TB(5), TPC-H Three TB(6) and TPC-H non-clustered 10 TB(7) scale component classes.
About Oracle Database 10g
The best database designed for grid computing, Oracle Database 10g delivers advanced performance, scalability, availability, protection and ease of administration on a low cost grid of industry general storage and servers. Oracle Database 10g is designed to subsist effortlessly deployed on everything from minute blade servers to the largest SMP servers and clusters of everything sizes. It features automatic administration capabilities for effortless, low in cost operation.
Oracle Database 10g's enjoyable skill to manage records from traditional company counsel to XML files and spatial/place guidance makes it the most suitable option to power online transaction processing, resolution champion and content material administration functions.
TPC-H is a conclusion champion benchmark such as a suite of company oriented advert-hoc queries and concurrent facts adjustments. The efficiency metric is known as the TPC-H Composite question-per-Hour efficiency Metric ([email protected]) and displays numerous facets of the capability of the device to system queries. extra suggestions is available at http://www.tpc.org/.
Oracle is the area's largest commercial enterprise utility business. For extra assistance about Oracle, talk over with their web website at http://www.oracle.com/.
Oracle is a registered trademark of Oracle organisation and/or its affiliates. other names could subsist emblems of their respective house owners.
TPC-H, QphH, $/QphH are emblems of the Transaction Processing efficiency Council (TPC).
As of can too 14, 2007: supply: Transaction Processing efficiency Council (TPC), http://www.tpc.org/
(1) HP Integrity Superdome Server, 16 processors/32 cores/32 threads, Oracle Database 10g liberate 2 commercial enterprise edition, 37,[email protected], $38.00/[email protected], attainable 5/14/07 (most efficient TPC-H 3TB result on home windows).
(2) To view the birthright Ten TPC-H with the aid of performance outcomes, delight consult with: http://www.tpc.org/tpch/outcomes/tpch_perf_results.asp
(three) HP Integrity Superdome Server, 32 processors/32 cores, Microsoft SQL Server 2005 commercial enterprise edition, 30,956.6 [email protected], $seventy five.16/[email protected], obtainable 5/5/06 (previous optimum TPC-H 3TB efficiency outcomes through a competitor on home windows).
(6) sun fireplace E25K Server, seventy two processors/144 cores/one hundred forty four threads, Oracle Database 10g free up 2 commercial enterprise version, 114,713 [email protected], $36.sixty eight/[email protected], purchasable 4/9/07 (TPC-H 3000GB World record efficiency result).
(7) HP Integrity Superdome Server, sixty four processors/128 cores/128 threads, Oracle Database 10g unencumber 2 commercial enterprise edition, 171,380 [email protected], $32.ninety one/[email protected], accessible 4/1/07 (TPC-H 10000GB Non-Clustered World list efficiency outcomes).
CONTACT: Teri Whitaker, +1-650-506-9914, [email protected], orLetty Ledbetter, +1-650-506-8071, [email protected], both of Oracle
internet site: http://www.oracle.com/
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In a 10g RAC installation, a node consists of a CRS home and an Oracle RDBMS home. The RDBMS home is where you install the Oracle software with the RAC option. You create databases from this home. The log files are related to each of the database instances running out of this Oracle home. The most vital log file that every database generates is the alert.log file that is created in the directory specified by the init.ora parameter background_dump_dest. For most sites, this directory is kept under $ORACLE_BASE/admin.
Suppose, for example, that you acquire a database named test. everything its background process trace files, along with the alert.log, would subsist available in the $ORACLE_BASE/admin/test/bdump directory; that's the norm. Its not a difficult and fleet rule that you utilize this directory structure, but it does champion to succeed conventions.
These directories are too vital for the RDBMS home:
$ORACLE_BASE/admin/udump Contains any trace file generated by a user process.
$ORACLE_BASE/admin/cdump Contains core files that are generated due to a core dump in a user process.
Let's steal a closer watch at the startup of an instance in a two-node RAC cluster running version 10.1.0.4. They utilize SQL *Plus to issue startup on node1 and then on node2. The sequence of events follows with additional explanations added as and when required:
SQL> startup nomount; Cluster communication is configured to utilize the following interface(s) for this instance 192.168.0.1 Mon Aug 29 07:25:09 2005 cluster interconnect IPC version:Oracle UDP/IP IPC Vendor 1 proto 2 Version 1.0 PMON started with pid=2, OS id=31242
The amend interconnect must subsist used for the Cache Fusion traffic. Some may elect the public network for the interconnect traffic, but doing so will bring the database to its knees. To identify the network used for Cache Fusion or private traffic, you can carry out any of the following:
Depending on the source of the information, the PICKED_KSXPIA is populated with the values OSD, OCR, and CI. If the cluster_interconnects parameter is set in the SPFILE, the query will revert the following output:
SQL> select INST_ID,PUB_KSXPIA,PICKED_KSXPIA,NAME_KSXPIA,IP_KSXPIA from x$ksxpia; INST_ID P PICK NAME_KSXPIA IP_KSXPIA ---------- - ---- --------------- ---------------- 1 CI prod1 192.168.0.1
Another option is the conventional way of finding the interconnect information from an Interprocess Communications (IPC) dump. This was the only way available in Oracle versions prior to 10g, but this way is too practicable in Oracle 10g. Starting from 10g R2, X$KSXPIA is exposed as GV$CONFIGURED_INTERCONNECTS.
Log in to the database as user SYS:
SQL> oradebug setmypid SQL> oradebug ipc
This will dump a trace file to user_dump_dest. The output will watch something like this:
SSKGXPT 0x1a2932c flags SSKGXPT_READPENDING info for network 0 socket no 10 IP 192.168.0.1 UDP 43749 sflags SSKGXPT_WRITESSKGXPT_UP info for network 1 socket no 0 IP 0.0.0.0 UDP 0...
You can espy that they are using IP 192.168.0.1 with a User Datagram Protocol (UDP).
To change the network that RAC uses, you can change the order of the network(s) in the operating system–dependent network configurations, such as /etc/hosts or by using the cluster_interconnects parameter.
A Little caution is required while using the cluster_ interconnects parameter. With Oracle 10g, interconnect information is stored in OCR, so you don't exigency to specify the interconnect using the cluster_interconnects parameter. Although this parameter supports load balancing among the specified interfaces, it does not provide failover capabilities, and in case one of several interfaces goes down, Oracle will treat it as a complete failure and start evicting instances. You can quiet utilize cluster_ interconnects with one IP address—for example, to work around a bug in the network selection or to utilize a specific NIC for a particular instance for test purposes.
The second the first instance is started, its alert log gets populated with vital information. The first thing to notice in the preceding instance after the list of non-default parameters is the IP address used for the interconnect. On the first instance, mentioning the cluster_interconnects parameter is necessary so that the amend interface is picked up—due to a bug that doesn't pick up the amend interface for the interconnect. too shown is the protocol used—in their case, UDP. The value shown would depend on your platform-specific usage—RSM could subsist used on Sun, HyperFabric on HP, and so on. Ensure that you espy the amend protocol that you acquire configured for the interconnect usage. The supported interconnect protocols with respect to various operating systems are listed in Chapter 3.
Mon Aug 29 07:25:11 2005 lmon registered with NM - instance id 1 (internal mem no 0) Mon Aug 29 07:25:11 2005 Reconfiguration started (old inc 0, modern inc 1) List of nodes: 0 Global Resource Directory frozen Update rdomain variables Communication channels reestablished Master broadcasted resource hash value bitmaps Non-local Process blocks cleaned out Mon Aug 29 07:25:11 2005 LMS 1: 0 GCS shadows cancelled, 0 closed Mon Aug 29 07:25:11 2005 LMS 0: 0 GCS shadows cancelled, 0 closed Set master node info Submitted everything remote-enqueue requests Dwn-cvts replayed, VALBLKs dubious everything grantable enqueues granted Post SMON to start 1st pass IR Mon Aug 29 07:25:11 2005 LMS 0: 0 GCS shadows traversed, 0 replayed Mon Aug 29 07:25:11 2005 LMS 1: 0 GCS shadows traversed, 0 replayed Mon Aug 29 07:25:11 2005 Submitted everything GCS remote-cache requests Post SMON to start 1st pass IR Fix write in gcs resources Reconfiguration complete LCK0 started with pid=17, OS id=31272
When an instance starts up, it's the Lock Monitor's (LMON) job to register with the Node Monitor (NM). That's what they espy in the alert.log with the instance ID that is getting registered. When any node joins or leaves a cluster, the global resource directory undergoes a reconfiguration event. They espy the start of the reconfiguration event along with the traditional and modern incarnation. Next, they espy the number of nodes that acquire joined the cluster. As this was the first node to subsist started up, in the list of nodes they espy only one node listed, and the number starts with 0. A reconfiguration event is a seven-step procedure and upon completion the "reconfiguration complete" message is logged into the alert.log.
The messages logged in the alert.log are summaries of the reconfiguration event. The LMON trace file would acquire more information about the reconfiguration. Following are the contents of the LMON trace file:
Here, you can espy the judgement for the reconfiguration event. The most common reasons would subsist 1, 2, or 3. judgement 1 means that the NM initiated the reconfiguration event, as typically seen when a node joins or leaves a cluster. A reconfiguration event is initiated with judgement 2 when an instance death is detected. How is an instance death detected? Every instance updates the control file with a heartbeat through its Checkpoint (CKPT) process. If heartbeat information is not present for x amount of time, the instance is considered to subsist deceased and the Instance Membership Recovery (IMR) process initiates reconfiguration. This character of reconfiguration is commonly seen when significant time changes occur across nodes, the node is starved for CPU or I/O times, or some problems occur with the shared storage.
A judgement 3 reconfiguration event is due to a communication failure. Communication channels are established between the Oracle processes across the nodes. This communication occurs over the interconnect. Every message sender expects an acknowledgment message from the receiver. If a message is not received for a timeout period, then a "communication failure" is assumed. This is more material for UDP, as trustworthy Shared reminiscence (RSM), trustworthy DataGram protocol (RDG), and Hyper Messaging Protocol (HMP) carry out not exigency it, since the acknowledgment mechanisms are built into the cluster communication and protocol itself.
When the obscure is sent from one instance to another using wire, especially when unreliable protocols such as UDP are used, it is best to win an acknowledgment message from the receiver. The acknowledgment is a simple side channel message that is normally required for most of the UNIX systems where UDP is used as the default IPC protocol. When user-mode IPC protocols such as RDG (on HP Tru64 UNIX TruCluster) or HP HMP are used, the additional messaging can subsist disabled by setting _reliable_block_sends=TRUE. For Windows-based systems, it is always recommended to leave the default value as is.
Database mounted in Shared Mode (CLUSTER_DATABASE=TRUE). Completed: alter database mount
Since this is an RAC database, every instance mounts the database in shared mode. Sometimes you want to mount the database in exclusive mode, as in completing the actions of a patch set application. Checking the alert log is one way to authenticate that:
Mon Aug 29 15:36:53 2005 alter database open This instance was first to open Picked Lamport scheme to generate SCNs
You may espy the message depending on the version of the RAC and setting of the parameter max_commit_propagation_delay. In version 9i, every consign System consign Numbers (SCN) is broadcasted to everything the nodes, and the log writer is held up until everything the interested redos are written to the disk. Starting with 10g, the wait is greatly reduced as the broadcast and consign are asynchronous. This means the system waits until it is positive that everything nodes acquire seen the consign SCN. Any message with an SCN greater than consign SCN is deemed sufficient.
Before doing a broadcast, the process checks whether it has already received a higher SCN from that instance. It used the identical SCN to determine whether a foreground or an LMS has to subsist posted. With 10g, this is decoupled: an SCN to release foregrounds and an SCN needed for shipping buffers. The init.ora parameter _lgwr_async_broadcasts = amend can subsist used to change the broadcast method.
Use the following table of contents to navigate to chapter excerpts or click here to view RAC Troubleshooting in its entirety.
Home: Oracle RAC troubleshooting: Introduction 1: Oracle RAC: Log directory structure in cluster ready services 2:Oracle RAC: Log directory structure in Oracle RDBMS 3: Oracle RAC and the Lamport algorithm 4: Oracle RAC: ON and OFF 5: Oracle RAC: Database performance issues 6: Oracle RAC: Debugging node eviction issues 7: Oracle RAC: Member voting 8: Oracle RAC: Cluster reconfiguration steps 9: Oracle RAC: Debugging CRS and GSD using DTRACING
About the book:
Oracle Database 10g: true Applications Clusters Handbook Learn to implement Oracle true application clusters from the ground up. Maximize database availability, scalability, and efficiency. Find RAC concepts, administration, tuning, and troubleshooting information. You'll learn how to prepare and create Oracle RAC databases and servers, and automate administrative tasks. You'll too win full coverage of cutting-edge Oracle RAC diagnostic tools, backup and recovery procedures, performance tweaks and custom application design strategies. Buy this reserve atMcGraw-Hill/Osborne
About the author:
K Gopalakrishnan is a senior principal consultant with the Advanced Technology Services group at Oracle Corporation, specializing exclusively in performance tuning, tall availability, and calamity recovery. He is a recognized expert in Oracle RAC and Database Internals and has used his extensive expertise in solving many vexing performance issues everything across the world for telecom giants, banks, monetary institutions, and universities.
Cluster Ready Services (CRS) has been introduced in Oracle 10g true Application Clusters (RAC) to provide a gauge cluster interface on everything platforms, enabling improved high-availability operations. CRS should subsist installed prior to installing 10g RAC in a HOME other than ORACLE_HOME.
There are several combinations with esteem to installing RAC in your environment. To denomination but a few of the most common scenarios: You can carry out a fresh installation, transform a standby database on Data Guard to RAC, and upgrade existing RAC instances. Oracle recommends the utilize of DBCA to create modern databases, which was covered in Chapter 2, "Installing Oracle Database 10g." Hence, they will focus here on performing a modern manual installation of RAC.
Manual Installation of RAC Instance
For a manual installation of a RAC instance, succeed these steps:
Start the installation process by making a copy of initSID.ora in your $ORACLE_HOME/dbs directory on UNIX platforms or in $ORACLE_HOME\database on Windows platforms. If you are using an SPFILE, create an initSID.ora file, edit it, and point your SPFILE to it or utilize alter system set... commands to change the instance-specific parameters. submit positive that your control file is pointing to an existing raw device or cluster file system location. For the entire example, they will convene their database as Q0RAC and convene their instances Q0RAC1 and Q0RAC2 on nodes 1 and 2.
Make changes to the path, filenames, and sizes as needed to suit your installation. Cluster-wide parameters for the Q0RAC database would subsist as follows:
From Q0RAC1 (the first instance), flee the following command:
alter database add logfile thread 2
group 3 (‘/dev/Q0RAC/redo2_01.dbf’) size 100M,
group 4 (‘/dev/Q0RAC/redo2_02.dbf’) size 100M;
alter database enable public thread 2;
Check whether your cluster configuration is up and running. utilize the ps -ef | grep crs command or flee crs_stat from the $ORA_CRS_HOME/bin directory. The crs_stat command will provide status information for resources on cluster nodes throughout the cluster.
Start the second instance, Q0RAC2. Now your RAC environment is ready for use.
Installation of RAC Instance Using Data Guard
You can too install a RAC instance using Data Guard, but it will subsist more complicated than the manual installation. The steps are too elaborate to subsist discussed within the limited scope of this chapter. refer to Oracle Data Guard Concepts and Administration 10g and MetaLink Note #273015.1 for more details.
The primary and standby databases must subsist running Oracle Database 10g (10.2) and each can subsist installed in either a single-instance or multi-instance environment. The database must subsist licensed for Oracle Enterprise Edition or Personal Edition.
You must utilize a server parameter file (SPFILE) to ensure the broker can persistently reconcile values between broker properties and any related initialization parameter values. espy Section 4.3.2 for more information.
The value of the DG_BROKER_START parameter must subsist set to TRUE. espy Section 3.3 for more information. (Enterprise Manager sets this parameter automatically.)
If any of the databases in the configuration is a RAC database, you must set up the DG_BROKER_CONFIG_FILEn initialization parameters for that database such that they point to the identical shared files for everything instances of that database. The shared files could subsist files on a cluster file system, if available, on raw devices, or stored using Automatic Storage Management (ASM).
Oracle Net Services network files must subsist set up on the primary database and on the standby database if you configure an existing standby database into the broker configuration. Otherwise, Enterprise Manager automatically sets up the network files when it creates a standby database.
If you are using a nondefault port number (for example, something other than port 1521) for the local listener address, you must set the LOCAL_LISTENER initialization parameter on each instance that is share of a broker configuration to a listener address that is reachable by everything members of the configuration. espy the Oracle Database Reference and the Oracle Database Net Services Administrator's usher for additional information.
To enable DGMGRL to restart instances during the course of broker operations, a service with a specific denomination must subsist statically registered with the local listener of each instance. The value for the GLOBAL_DBNAME credit must subsist set to a concatenation of db_unique_name_DGMGRL.db_domain. For example, in the LISTENER.ORA file:
Any database, including instances of the database, managed by the broker must subsist mounted.
If any of the databases in the configuration is a RAC database, the START_OPTIONS for that database must subsist set to MOUNT in the Oracle Cluster Repository (OCR) using srvctl as follows:
srvctl add database -d <db_unique_name> -o <$oracle_home> -s mount
srvctl modify database -d <db_unique_name> -o <$oracle_home> -s mount
The primary database must subsist opened in ARCHIVELOG mode.
You must set the COMPATIBLE initialization parameter to 220.127.116.11.0 or higher for both the primary and standby databases. However, if you want to steal odds of modern Oracle Database 10g features, set the COMPATIBLE parameter to 10.2.0.0.
Ensure the COMPATIBLE initialization parameter is set to the identical value on both the primary and standby databases. If the values differ, redo transport services may subsist unable to transmit redo data from the primary database to the standby databases.
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