How did this note help previous owner of this old film camera? solutions. Data Imbalance: what would be an ideal number(ratio) of newly added class's data? How to check if RMAN catalog is installed for a database? Also, decide whether to operate the catalog database in ARCHIVELOG mode, which is recommended. This paper doesnt provide ready to use Connect and share knowledge within a single location that is structured and easy to search. Database Maintenance Optimization Brad Mc Gehee, Prevent Recovery Amnesia - Forget The Backups, Case Study: A Complex SharePoint Migration, AWR DB performance Data Mining - Collaborate 2015, Oracle 12c RAC On your laptop Step by Step Implementation Guide 1.0, All Oracle DBAs have to know about Unix Memory Monitoring, Sharing experience implementing Direct NFS, Oracle 11G SCAN: Concepts and Implementation Experience Sharing, Be A Great Product Leader (Amplify, Oct 2019), Trillion Dollar Coach Book (Bill Campbell). Is there a political faction in Russia publicly advocating for an immediate ceasefire? recovery procedures. If you ask your own question - our Certified Experts will team up with you to help you get the answers you need. If you are creating your recovery catalog in an already-existing database, add enough room to hold the default tablespace to the recovery catalog schema. Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, How APIs can take the pain out of legacy system headaches (Ep. Have a client in Oracle 8i and they don't know if RMAN Catalog is configured. If possible, take other measures as well to eliminate common points of failure between your recovery catalog database and the databases you are backing up. database. Leverage additional RMAN catalog benefits Is a neuron's information processing more complex than a perceptron? The recovery catalog is stored in the default tablespace of the schema. Improve RMAN based backup procedures APIdays Paris 2019 - Innovation @ scale, APIs as Digital Factories' New Machi Mammalian Brain Chemistry Explains Everything. The information within the catalog should be the same as to what is in the database itself (the controlfiles) concerning the backup. For a more typical case in which only a portion of the backup piece row space is used, 15 MB for each year is a realistic estimate. manager (RMAN) catalog was the default option.
What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange. Find centralized, trusted content and collaborate around the technologies you use most. I would not worry about connecting to the catalog for this information.
Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. This must be run under the database that contain Re: how to identify whether a particular database is backed up using catalog or nocatalog . Where you will see where you are connecting to catalog or not. Now customize the name of a clipboard to store your clips. If the catalog tablespace is this user's default tablespace, then you can run this command: You can specify the tablespace name for the catalog in the CREATE CATALOG command. First the IBM Spectrum Protect Server will need to be queried for the backup object names. Activate your 30 day free trialto unlock unlimited reading. RMAN backup validation: are your backups ready for recovery? Running RMAN Scripts with the job scheduler (Oracle), Restoring RMAN Oracle 10g Backup in Oracle 11g, Refreshing tablespace using RMAN incremental backup from one DB to Other, RMAN backups only get larger and don't delete, Retention Policy with RMAN Incremental Backups, oracle online recovery does not change archived db.
This paper will review: What costs are involved with running catalog database; What problems does it address and what
00:00so next is a DB recovery from Arman full, 00:08understand about database recovery and, 00:11all the different scenarios of database, 00:14recovery when you have Arman full backup, 00:17basically we will be taking full arm and, 00:21backup of the entire database and then, 00:23we will simulate multiple scenarios let, 00:26us look at the multiple scenarios that, 00:30first of all we will work on loss of, 00:34data files only which means we'll take, 00:36the DB full backup we will delete all, 00:40the data files and we'll recover the, 00:43database using the backup we have taken, 00:47the next scenario we will take DB full, 00:51backup then we'll delete the control, 00:56recover the database using the backup, 00:58which we have taken next we will take, 01:02the DB full backup then we'll simulate, 01:05the error by removing all the parameter, 01:09files control files and data files and, 01:11then recover or restore our database, 01:15from the backup which we have taken so, 01:18these are almost all the scenarios which, 01:23environment but of course apart from, 01:26this you will not see any other kind of, 01:28scenario remember this activity will be, 01:32done by using Arman full backup so which, 01:36means we'll be taking Arman full backup, 01:45recovery you must make sure you have a, 01:47proper backup do not go for recovery, 01:55files even while practicing you will, 01:57never be able to recover and then for, 01:59practice also you need to recreate your, 02:14database must be running in archive log, 02:16mode definitely otherwise you won't be, 02:24confirm the backup tag before performing, 02:29because from the backup tag you will, 02:31restore your database and you must have, 02:35a recovery catalog configured we know, 02:38the benefits of recovery catalog why we, 02:40need recovery catalog and other details, 02:44I will also discuss while we are in the, 02:51mandatory steps that you need to follow, 02:53before performing any recovery in test, 02:57environment to efforts in production, 02:59also when you are working you must make, 03:01sure you have proper backups and just, 03:05then information for you guys whenever, 03:09you work with any production environment, 03:16perform an entire environment backup, 03:19audit now that audit can be done once in, 03:22three months why because sometimes there, 03:26might be issue with the Armen scripts or, 03:28sometimes there might be issue with some, 03:30cron job or there is like issue with, 03:34your backup command and your Armen is, 03:38not at all taking the backup of your, 03:40databases now in such scenarios if you, 03:43have like more than 300 or 500 databases, 03:46it's good to audit your environment and, 03:49validate whether your Armen is taking, 03:52proper backups or not and that way you, 03:56will be confident and safe that at any, 03:58given day if some database crashes you, 04:01have the backups ready to be restored, 04:08running fine until you perform an audit, 04:11sometimes someday something might happen, 04:14few of the live examples if you want, 04:17somebody might delete the Armen script, 04:20file it might happen or somebody edited, 04:24the Armen script file but there was some, 04:34scripts so because of all these issues, 04:37you might lose on your backups and if, 04:46server and on the right-hand side we, 04:48have our catalog server first of all, 04:53catalog database so that from production, 04:55we can connect to the catalog on the, 05:01start the listener LS in our CTL because, 05:05without listener we cannot perform the, 05:25meanwhile our catalog database is coming, 05:28up let us start the production database, 05:31to switch to Oracle user sqlplus / as, 05:36this DBA startup to select name comma, 05:48database create our production server is, 05:53up so what we'll do well exit and start, 05:56the production listener LS in our CTL, 06:00start of course we don't need production, 06:03listener because in catalog we only have, 06:07fun way networking but it is always good, 06:09to have the listener up and running for, 06:12production also so let us look at our, 06:20scenario we need to look at two phases, 06:22of database backup and recovery because, 06:28recovery to perform the recovery we need, 06:33backup we need to look at both the sides, 06:36of the database how the database was, 06:41and how the database looks like after, 06:44the crash so in this scenario the loss, 06:49remember this green arrow shows that the, 06:52database is life so the first phase over, 06:56here is the first line it is the normal, 06:58database functioning now let us assume, 07:02our database is working normally and, 07:05take this as the time line that is first, 07:13normal database functioning time line, 07:18functioning normal we had taken a DB, 07:25database backup and recovery scenarios, 07:27so we take a DB full backup and after, 07:31the backup is completed we create a new, 07:35user and create one table inside that, 07:41simulate a failure where V ourselves, 07:45will delete the data file set OS level, 07:47which means the database will become, 07:50inaccessible after the point of time, 07:53when we delete the data files right now, 07:56this is the normal functioning of the, 07:58database and we are simulating only the, 08:01data file loss error so let us look at, 08:04the recovery phase of the database now, 08:10phases the first one is restore so from, 08:13where can we restore the data files see, 08:17we did not lose our SP file we did not, 08:20lose our control files so our loss is, 08:22only data files what we need to do is, 08:25from the backup that we had taken we, 08:28have to restore only the data files what, 08:33files and then we will just recover our, 08:37database by applying archives + redo, 08:40logs now what is the meaning of applying, 08:43the archive logs and really locks while, 08:49creating the user there might be some, 08:51data which is still there in the redo, 08:56and remember we did not lose our redo, 09:01content is available in redo log files, 09:03so when we issue the command recover, 09:11intelligent it knows that which archive, 09:15is required to recover the database from, 09:23restored let's take you have restored, 09:35sequence and Arman will get the archive, 09:38log from the backup and it will keep on, 09:45backup now let's take the archives are, 09:50archives are available on the disk Arman, 09:52is still intelligent it will apply all, 09:55the archive logs which are available on, 09:58the disk which were not yet backed up, 10:00also so what Arman will do is in our, 10:04case we have only one DB full backup and, 10:07after this DB full backup we did not, 10:09take any backup which means after this, 10:12DB full backup still the archive logs, 10:14are available on the disk they are not, 10:18hit backed up so after the restore when, 10:21we recover our database Arman will apply, 10:31archives are completed it will apply the, 10:35transactions that are available in the, 10:37redo logs to bring it to the point when, 10:40the crash has happened and then you can, 10:44open your database because you already, 10:46had your SP file there was no loss of SP, 10:49file you already had your control file, 10:51there was no loss of control file we, 10:54have restored our data files from the, 10:57backup we have recovered our data files, 10:59by applying the archive locks and redo, 11:10database the database is online and this, 11:14is nothing but our complete recovery, 11:17there is no loss of data and when you, 11:20open the database exactly till the point, 11:26so now after performing the complete, 11:29recovery we must be able to see this new, 11:34created because this was never backed up, 11:41archive logs we had taken backup before, 11:44creating the user and a table inside, 11:49complete recovery and when our database, 11:51is up and running we must check whether, 11:54the new user is visible or not so let us, 11:58perform all these steps one by one and, 12:00look at both the phases of backup and, 12:04recovery in scenario where we lose only, 12:07the data files fine let us get into the, 12:12first scenario where we have the data, 12:15file loss only but before getting into, 12:18the scenario as we know we should take, 12:20the database backup the activity flow, 12:23would be take DB full backup and delete, 12:26all the data files at worst level we'll, 12:29have to kill the database instance if it, 12:31is still running because when we are, 12:34deleting the OS level data files our, 12:35instance is still up and running so we, 12:38have to kill the database instance next, 12:42instance and take it to mount stage now, 12:45remember we only have the loss of data, 12:47files with SP file you can take it to, 12:50gnome on stage and with control files, 12:52you can take it to mount stage great, 12:56next is connect to our men with catalog, 12:59and list the backup so choose the proper, 13:02backup tag and then just restore the, 13:05database from the tag as I told you our, 13:08recovery mechanism has two stages that, 13:11is first we have to restore and then, 13:13recover our database so just issue the, 13:16command restore database from tag which, 13:20that you want to restore your database, 13:22in our case will restore our database, 13:25from the tag which we had just taken, 13:27before the activity and then we issue, 13:30the command recover database which will, 13:32automatically recover our database by, 13:34applying all the archive logs and new, 13:37transactions available in the redo log, 13:39files so let us start first of all will, 13:44connect to the target DB and catalog and, 13:46we'll also take the full database backup, 13:52so Arman target slash catalog arm an, 13:59underscore RC / Armin hundred so RC at, 14:02the date are cat so what we'll do is, 14:06database + archive log we don't need to, 14:11parallelism and default channels are set, 14:14to take the backup to perfect locations, 14:18even though before issuing this command, 14:24parameters if they are set correctly or, 14:26great so first of all show all we can, 14:33configured to take the backups into this, 14:35location next what we will do is let us, 14:42delete some of the backups because we, 14:44need to optimize our disk space as this, 14:47is test environment we don't have so, 14:49much of space on disk to continuously, 14:52take the backups so first of all list, 14:59so there are so many backups that we, 15:03delete almost all of them by keeping the, 15:06last backup so that our disk space is, 15:10optimized so delete backup tag just give, 15:16the tag number which backup you want to, 15:18delete enter remember if you issue this, 15:21command delete backup tag it will always, 15:25delete or not you will have to say yes, 15:27or no and only after entering yes it, 15:31pieces in case if you do not want this, 15:34kind of prompt you can say delete no, 15:37prompt it won't prompt you whether you, 15:40want to delete or not it will go ahead, 15:42and delete whatever backup pieces are, 15:45associated with the backup time so we, 15:48had deleted the 19 5 6 5 8 backup tag, 15:53will delete this one the next backup, 15:56time now you will observe that it is not, 16:02asking whether you really want to delete, 16:04or not so delete no prompt backup tag, 16:06give the tag name it will delete all the, 16:08pieces associated with the backup tag so, 16:14some might have single backup piece or, 16:16some might have two or more than two, 16:22channels that you have allocated while, 16:24taking the backup so delete this one, 16:38backup of database summary once again, 16:45delete no prompt backup tag will delete, 16:59okay fine I think this is enough so we, 17:03can go ahead and perform our activity, 17:05first of all what we need to do is we, 17:13perfectly set so backup database plus, 17:29okay great so our backup is completed, 17:37complete the backup you must seek the a, 17:39backup tag because that is the backup, 17:42tag we'll be using to restore our data, 17:45files after the loss so list backup of, 17:50database summary and the last one the, 17:56date we'll just copy this backup tag and, 18:07taken the backup of the database what we, 18:09will do is we'll go ahead and create a, 18:11new user and a table inside that user so, 18:16going back to our slide what we have, 18:20done is we have taken the DB full backup, 18:22and after the backup whatever we are, 18:24doing that data will be available only, 18:26either in the archive logs or in the, 18:29redo logs so let us connect to database, 18:33SQL plus slash else is TBA so I have, 18:44directly execute this command so create, 18:46user MGR identified by MGR next is we, 18:52have to grant connect resource create, 18:54session to MGR so connect with MGR user, 19:00slash MGR connected now create a table, 19:05as MGR user we are just creating a dummy, 19:07table table name is test first column is, 19:10serial number and second one is name now, 19:16inserting some dummy values just for, 19:30record three and record four so we'll, 19:36come it select star from test quit so, 19:44the table has been created now what we, 19:48have done till now we have taken the, 19:49backup we have created a new user and a, 19:53table inside the user let us perform a, 19:55lock switch just to be careful that we, 20:02connect slash as this TBA alter system, 20:10okay system altered great next is we, 20:17need to simulate a failure what we will, 20:19do is we will go ahead and delete all, 20:21the data files so before deleting all, 20:23the data files we will get the location, 20:25of the data file so select name from v, 20:29dollar data file without shutting down, 20:38prompt and right away deleting all the, 20:41data files RM hyphen RF second third, 20:48fourth and fifth I am just deleting all, 20:53the data files at OS level so all the, 20:57files have been deleted let us check, 21:02exists or not no data file exists so, 21:10simulated our failure that means let us, 21:19mounted on user one and that hard disk, 21:22got crashed so all our data files are, 21:25lost next is we need to start with our, 21:27recovery process now recovery process, 21:32database instance if it is running first, 21:33check whether the database instance is, 21:38check by issuing psi - EF grapheme on, 21:41now you can directly kill the instance, 21:46kill - nine with the process ID check, 21:52running so instance is not running right, 21:54now now what you need to do is you need, 21:57to start the database instance remember, 22:01you should have our favorite diagram in, 22:05the mind if you have SP file you can go, 22:09till no mount stage so in our loss we, 22:13means we can go till at least no mount, 22:15stage let us do that sqlplus / assist, 22:19DBA startup no Mount great and we also, 22:26know that we did not lose our control, 22:28files which means I can also go till, 22:30mount stage alter database mount find, 22:36our database is mounted but I cannot, 22:39open my database because I have lost all, 22:41my data file so I'll exit from a scale, 22:43from now I'll use Armen to restore my, 22:55underscore RC / Armen underscores he at, 22:58the rate are cat so this will connect to, 23:02both here target database and catalog, 23:05database so when it is connected to your, 23:07target database it will always tell you, 23:09that it is not open whatever the state, 23:11of the database it will show up over, 23:25connected to catalog also we can also, 23:27issue list a backup of database summary, 23:32but we have already started with the, 23:35instance and taken it to mount stage now, 23:38we are connected to our mannan and we, 23:40have to issue the below command so what, 23:43we need to do is we need to issue the, 23:45command restore database from tag from, 23:47which tag remember we will have to use, 23:53taken before performing the activity, 23:57latest backup restore database from tag, 24:01and I will use the latest backup which, 24:06we had just now taken this is the tag, 24:08number and enter what this will do is, 24:12this will restore only the data files, 24:17control file or SP file because you have, 24:20control file and SP file auto backup on, 24:25restore database when you issue this, 24:27command it will only copy back the data, 24:30files from the backup piece whatever the, 24:33backup piece it has taken backup - so, 24:37now if you read through the output of, 24:40the command it says starting restored at, 24:4330th May 16th allocating channel or our, 24:46disk 1 now looking at the disk sorry the, 24:50channel name we can make sure that this, 24:53is an automatic channel that is assigned, 24:55by our men because automatic channel, 24:57starts with aura underscore device type, 25:01underscore the number now channel or a, 25:04disk one this is the S ID at waist level, 25:07so we can leave that so channel or a, 25:10disk 1 starting data file backup set, 25:12restore first of all what your channel, 25:16will do is it will identify the backup, 25:18set which is associated with this backup, 25:21type now from the backup set it will, 25:24perform the restore of all your data, 25:26files that is your system sis ox undo, 25:29users examples and you can also see that, 25:33reading from backup piece this is the, 25:35backup piece from which it has performed, 25:37all this restore right after that it is, 25:42like piece handle this is nothing but, 25:44the same file name and this is the tag, 25:49backup piece now restored backup piece, 25:51one restore complete and it has taken 1, 25:55minute 6 seconds to restore finished, 25:58restore at 30th may now I would like to, 26:02go back to our scenario see we have now, 26:06performed the restore data file from, 26:09type restore is done now what we need to, 26:12do we have to perform recovery so that, 26:14from this stage we can take the database, 26:18till the crash time so how do we perform, 26:21that recovery you just need to issue the, 26:23command recover database and as I told, 26:26you our man is very much intelligent it, 26:29knows where the archives are available, 26:31from where to pick up them whether to, 26:34pick up the archives from the backup and, 26:36apply or pick up the archives from the, 26:42transactions from the redo logs and then, 26:44apply so it will apply all the possible, 26:47ways and then it will open the database, 26:53recover at 30th May using channel that, 27:00finished recover at 30th May that means, 27:09command we have perform the second stage, 27:12of recovery that is recover our database, 27:15now what we need to do is we need to, 27:18open our database because it will still, 27:21be in the mount stage so what you can do, 27:23is SQL alter database open as I told you, 27:29some of the SQL statements you can issue, 27:31from our main prompt itself you don't, 27:33need to go to scale plus so the command, 27:38is successful PS - AF grip Eamon now our, 27:50restored data files from the backup tag, 27:55applying all the archive locks and redo, 27:57logs and we have opened our database, 27:59that means our database is now life what, 28:02we need to do is we need to check the, 28:04new user whether it is visible or not, 28:07and also the table that we have created, 28:10after the backup was taken sqlplus /, 28:20underscore mode from V dollar database, 28:23this prod DB is up and running fine well, 28:26connect to MGR slash MGR this the user, 28:29that we had created which means we are, 28:32able to connect to the user that means, 28:34create user statement is validated now, 28:37we need to check whether this new table, 28:39exists or not select star from the table, 28:43name we gave was test so the table is, 28:47also available which means using our men, 28:54we had performed a complete recovery, 28:57where we had only loss of data files so, 29:03in our next scenario we will look at, 29:05both the control file and data file loss. Looks like youve clipped this slide to already. Introduction to Oracle RMAN, backup and recovery tool. from it. What are the purpose of the extra diodes in this peak detector circuit (LM1815)? Thanks for contributing an answer to Stack Overflow! My intention is not to discourage you from using catalog This paper discusses in details the cost and value of RMAN catalog database. 1.45v 2013.04.10 RMAN #1: Backup and Recovery | RMAN database & Archivelog Backup | RMAN Level-0 & Level-1 backup.
Assume approximately the same amount for archived logs. The database is configured in the same way as all normal databases, for example, catalog.sql and catproc.sql have successfully run. Were working tech professionals who love collaborating. The title of this paper is purposely thought provoking. Blockchain + AI + Crypto Economics Are We Creating a Code Tsunami?