May 26

OCM 12c Preparation - Where to take the exam

The place to take the exam is one of the most difficult things to decide if you do not live near a test center. The OCM exam is very expensive. You need also to add to this cost hotel + flight + anything else during your exam trip. So, first of all, the most important …

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May 25

Oracle 12.1.0.2 CDB creation - catcdb.sql returning ORA-22288 or ORA-29548

Those days I was trying to create an Oracle Database 12.1.0.2 CDB using only sqlplus in a Oracle Linux 6.5 64 bits. So after issuing the CREATE DATABASE command, it was time to create all the dictionary: $ sqlplus / as sysdba @?/rdbms/admin/catcdb.sql However, something was going wrong because both Oracle Java and Oracle Multimedia …

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May 24

OCM 12c Preparation - Course requirements

There are 3 things to remember here that are very important: "Courses used to fulfill the OCP training requirement may not be used again to fulfill the OCM training requirement." "Courses can be instructor-led in-class (ILT), a live virtual class (LVC), training on demand (TOD), or Unlimited Learning Subscription. Self-study CD and online courses are …

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May 24

OCM 12c Preparation - Prepare your Environment

As we have many situations to deal with in the topics, my recommendation is creating 6 VMs using Virtualbox: Oracle DB Single Instance + Oracle Data Guard RAM: 4G / = 10G ; SWAP = 8G ; /u01 = 40G (Ora Binaries + Datafiles) Oracle Enterprise Manager + Oracle Data Guard RAM: 6G / = 10G ; …

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May 10

Removing exposed HTTP Digest hash from user$ in Oracle 12.1

Background Oracle 12.1 has introduced a lot of new cool security features and improvements. We all agree with that. However, one of the most bizarre and security vulnerability things that Oracle did in this release was introducing HTTP Digest Authentication to allow XDB users to log in. The new EM Express Edition is one of the …

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