Posts

Showing posts with the label RMAN Backup

Redis user permissions (ACL) and python connection

-
 Recently, I was working on setting up a redis cluster along with separate users for readwrite and readonly. I setup the readonly user using the below privileges (ACLs):   user redisreadonly on >mySuperSecretPassword ~* resetchannels -@all +@read +ping +asking   Once this is setup, I wrote a simple program in python to connect to the redis cluster using the readonly credentials and print the number of keys.   #!/usr/bin/env python3 """ pip3 install redis """ from redis.cluster import RedisCluster, ClusterNode # ─────── Cluster connection ─────── startup_nodes = [ ClusterNode("redis_host_1", 6379), ClusterNode("redis_host_2", 6379), ClusterNode("redis_host_3", 6379) ] rc = RedisCluster(startup_nodes=startup_nodes,decode_responses=True,username='redisreadonly',password='mySuperSecretPassw...
Post a Comment
Read more

Extract Controlfile from a backupset using RMAN

-
In my previous post, I had talked about extracting controlfiles, datafiles and archivelogs from RMAN backupsets using the package dbms_backup_restore. In this post, I would like to throw light upon using RMAN as an alternate method that could be employed to extract controlfiles from RMAN backupsets. This method uses the RMAN command "restore controlfile from '<FULL_PATH_TO_CONTROLFILE_BACKUP>'". The RMAN method can be used in 3 scenarios. So, make sure that at least any one of the backups is indeed available. Else, you are DOOMED! I. the controlfile autobackup is turned on in RMAN. In this case the file format would be "c<DBID>-<DATE>-<COUNT>". It is turned on using the command: configure controlfile autobackup on; configure controlfile autobackup format for device type disk to '/opt/apps/vision/backup/%F'; II. the controlfile snapshot backup is configured in RMAN. It is turned on using the command: configure snapshot control...
Post a Comment
Read more

Extract Controlfile, Datafiles & Archivelogs from RMAN Backupsets

-
The other day, one of my colleagues posed me this interesting and thought-provoking question/scenario: "Suppose, you were to lose both your production and your RMAN catalog databases irrevertably. You do have a full/incremental RMAN backup, however. How are you going to recover?" How indeed? I scratched my head and shone a torch upon the dark recesses of my memory to come up with an answer. The light (of the torch) did indeed reveal something - that is that a note existed in Metalink which list the method that could be used to delve into a RMAN backup set to extract the controlfile, the datafiles and also the archivelogs and Voilà, I hit the nail right on the head. I did some more digging and found a bunch of "Notes" in Metalink that pointed me to the eventual answer to the above question. The Notes that I am referring to are listed below. A summary of the procedure to be followed in such scenarios is also provided. All the notes mentioned use the package dbms_backu...
Post a Comment
Read more

Popular posts from this blog

EXCEPTION_ACCESS_VIOLATION in Jinitiator and IE crashes

-
The Environment Apps Version : 11.5.10.2 Jinitiator Version : 1.3.1.26 Internet Explorer Version : 6 The Issue One of our end users was receiving a very strange error while using jinitiator. The Internet explorer window would crash (close by itself) after creating a file HS_ERR_PID .log on the desktop, where #### stands for the Process ID of the f60webmx session. This error is intermittent and not easily reproducible. Moreover, the user would have to redo his/her work and hence this issue was turning out to be very vexing indeed. The error log is as below: An unexpected exception has been detected in native code outside the VM. Unexpected Signal : EXCEPTION_ACCESS_VIOLATION occurred at PC=0x6D043D1AFunction name=Java_sun_java2d_loops_DefaultComponent_IntIsomorphicCopy Library=C:\Program Files\Oracle\JInitiator 1.3.1.26\bin\awt.dll Current Java thread: at sun.java2d.loops.DefaultComponent.IntIsomorphicCopy(Native Method) at sun.java2d.loops.IntRgbToIntRgb.OpaqueBlit(Unknown Source) at ...
Read more

Version of mod_security with EBS 11.5.10.2

-
Though it was a bit tough to find out the version of Mod_security that is shipped with E-Business Suite 11.5.10.2, I finally managed to do it, thanks to Metalink Fora! The version that comes with eBS 11.5.10.2 is 1.8.4 . Below is how you find out the version of mod_security shipped with your version of eBS. $ strings $IAS_ORACLE_HOME/Apache/Apache/libexec/mod_security.so | grep mod_security/
Read more

Read a file and extract specific lines using Native Ansible Modules

-
I never realised that reading a file on a remote host and extracting specific lines from that file would be such an arduous task. As part of one of my projects, I had this requirement and without using "cat" or other shell utilities, it was quite cumbersome to read and extract the information that I was looking for. Read on to find out how it can be done using Ansible native commands. Note that I have suggested only one out of a possible many methods. Feel free to explore yourself and update the comments here! REMOTE FILE CONTENTS $ cat /tmp/IP_and_hostnames.txt $ cat /tmp/IP_and_hostnames.txt 192.168.230.165:example-host-1.example.com 192.168.230.166:example-host-2.example.com 192.168.230.167:example-host-3.example.com 192.168.230.175:example-host-1-vip.example.com 192.168.230.176:example-host-2-vip.example.com 192.168.230.177:example-host-3-vip.example.com 192.168.230.185:example-host-1-priv.example.com 192.168.230.186:e...
Read more