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Oracle RAC Administration - half 6: Administering the Database situations and Cluster Databases
Oracle has ultimately released its Oracle 10G liberate 2 database for Solaris 10. I even have been watching for it for quite a while and i hope that they had been in a position to repair the clusterware problems, which had had some concerns. Anyway, i will verify it on my ESX container, which has three able baked Solaris 10 U1 working methods.
ok moving forward with their administration sequence, they will analyze administering their database situations and cluster databases.
equipment essential for administering their instances
For every administration project, you need a gradual and authentic set of tools. I have viewed many tools (and that i mean third celebration equipment) however when it comes to taming the Oracle database, make sure you have a glance at the tools discussed (briefly) beneath. It in fact doesn’t be counted if you're administering a multi-node RAC farm or a single Oracle example:
using Oracle enterprise manager
using SRVCTL (our potent utility)
Managing Oracle actual software Clusters with SQL*PLUS
we can all inform stories concerning the famed SQL*Plus device, however examine into it within the guide labeled Utilities. or not it's an excellent utility and is readily attainable with the installed Oracle base. are attempting to connect using the proper parameters, similar to naming the instance, as a result of with the aid of default, the SQL*Plus prompt doesn't identify the current example. so that you would typically do anything like this in case you deserve to connect with a special illustration in SQL*PLUS:
if you want to trade the SQL*Plus instantaneous, so that it instantly comprises the name of the current instance, you'll should class here instructions for your SQL*Plus:
SET SQLPROMPT '_CONNECT_IDENTIFIER> '
Now, what this command will do is, it replaces the SQL string before the > image with the person variable _CONNECT_IDENTIFIER that should ideally screen the present illustration identify for the time when you could be logged into your example. they have additionally seen Tom Kyte’s script, which did that automagically since models eight.x. All you must do is enter here textual content into your glogin.sql; this file can also be found on your SQL*Plus listing:
SET SQLPROMPT '_CONNECT_IDENTIFIER> '
which you can also add another obligatory text or perhaps a SQL*Plus consumer variable between the only rates within the command. they all comprehend that they can have a number of SQL*Plus classes to the equal illustration. To operate any essential tasks, that you could go surfing as SYSOPER or SYSDBA. Administrative projects akin to instance shutdown, startup can also be performed with these admin privileges.
Managing Oracle precise application Clusters with commercial enterprise supervisor
This net-primarily based device has come of age and offers an business category administration and RAC manage, to manage a single Oracle RAC database. commercial enterprise supervisor is the relevant tool that focuses on all possible features of their RAC provider, featuring a vital aspect of manage for the Oracle ambiance via a graphical person interface (GUI).
Oracle commercial enterprise supervisor can be used to start, cease and video display databases, RAC cases and the linked Listeners. There are schedule jobs, alert thresholds, altering schema, storage features and a lot greater. they will devote more time to the commercial enterprise manager, considering it is a really constructive tool, even for Grid control, which means when administering a GRID. furthermore, business manager can perform tasks on the fly, on dissimilar RAC databases.
Managing Oracle real software Clusters with SRVCTL
In a old article, they did some work with the SRVCTL device, which they touted as an impressive utility, and it's potent, for many reasons. SRVCTL is the supply to all of the feeds that go into the commercial enterprise supervisor. The configurations, for example, are all picked up from a list that SRVCTL generates when discovering and monitoring the nodes in their RAC. These configurations are all stored in their Oracle Cluster registry (OCR) file. moreover, enterprise manager uses SQL*PLUS to stop and begin the situations. Of direction, the business manager uses many more equipment (which they as DBAs and builders use each day) than simply the above-mentioned equipment, to arm you with a robust GUI.So now it's time to circulation on to the more robust, enhanced and have wealthy equipment present in commercial enterprise supervisor. As that you may see, these tools are all impartial and yet interdependent.
An instance : starting/Stopping using a lot of equipment
we are able to use all of the equipment to perform the delivery/cease initiatives, whether it enterprise manager, SQL*Plus or SRVCTL. Assuming that they are the use of the SPFILE, which is a good option anyway, lets do right here:
setting out and Shutting Down with enterprise manager
taking off and Shutting Down with SQL*Plus
setting out and Shutting Down with SRVCTL
make certain that your Clusterware is operating. You should not in a position to delivery your RAC (upon getting introduced it down for this exercise) in case your CRS stack is not working accurately. all of the approaches should be running in place. The procedure for shutting down RAC cases is relatively a lot the equal as performing that type of exercise on a single-instance Oracle database. There are however some vital facets to be aware. check with the Admin manual for greater information on shutting down the databases. the important thing variations are:
Bringing down some of the many nodes will now not have an effect on the performance or the supply of the complete RAC carrier. These operations are very usual when performing renovation and improve projects whereas the RAC illustration and the core company application continue to run regardless of all shutdowns and restarts in the again-end.
in order to shut down a RAC database completely or the RAC provider absolutely you will must function that operation on each and every single node. The nodes could have the database in mounted or in open state.
You do not have to agonize about instance healing, as you might on your single-instance Oracle database, after having achieved a normal or instant shutdown. You have to, despite the fact, perform healing should you situation the SHUTDOWN ABORT command or if the example or the purposes terminated abnormally. The first rate half is that the node that continues to be up will function the instance healing for the nodes that had been introduced down abnormally. furthermore, it occurs automatically when none are up, the first one immediately detects and recovers the ailing nodes.
Doing SHUTDOWN TRANSACTIONAL local helps bringing down the local node after its transactions are all dedicated or rolled lower back. It does this in addition to the SHUTDOWN immediate command. There is not any interference of other nodes.
In their next article, they are able to proceed to perform the shut down and begin up assignment using SQL*PLUS, Oracle commercial enterprise manager and SRVCTL.
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