Infrastructure at your Service
This week I took some days off to do something related to my job but a bit different. I’ve given a course on Databases and SQL. But not for my usual customers. And not with the database I know the best. So, it is still in a domain that I know, but out of my comfort zone. And this is something that we should do more often because it gives a little apprehension and a…
Auditing operations with Oracle Database is very easy. The default configuration, where SYSDBA operations go to ‘audit_file_dest’ (the ‘adump’ directory) and other operations go to the database may be sufficient to log what is done but is definitely not a correct security audit method as both destinations can have their audit trail deleted by the DBA. If you want to secure your environment by auditing the most privileged accounts, you need to send the audit…
A few things have changed about the Autonomous Data Warehouse Cloud service recently. And I’ve found the communication not so clear, so here is a short post about what I had to do to start the service again. The service has always been on the OCI data centers but was managed with the classic management interface. It has been recently migrated to the new interface: Note that ADWC here is the name I’ve given for…
With this trend of CQRS architectures where the transactions are streamed to a bunch of heterogenous eventually consistent polyglot-persistence microservices, logical replication and Change Data Capture becomes an important component, already at the architecture design phase. This is good for existing products vendors such as Oracle GoldenGate (which must be licensed even to use only the CDC part in the Oracle Database as Streams is going to be desupported) or Dbvisit replicate to Kafka. But…
You may wonder what I’m doing with those technologies that are completely different from what I usually do. I’ll detail in a future blog post but the idea is giving a short introduction to databases to students at https://powercoders.org/, a coding academy for refugees in Switzerland. They install MAMP (My Apache – MySQL – PHP) during their curriculum for website development, and then I’ll use this environment to teach data modeling and SQL basics. Thus,…
I thought it was a bug for two reasons: first, because I don’t like that my connect destination depends on the context, and then because it is a different behavior than in SQL*Plus. But finally, it is the correct behavior, and the 100% compatibility with SQL*Plus is expected only when SET CLASSIC=ON. And as I was surprised, and I think it can be dangerous, here is a blog post about it. Basically, be very careful…
If you want to play with OpenShift on your laptop, you can, in a Virtual Machine. I have VirtualBox installed on my laptop. I’ll install Minishift here, which will create the VM to run OpenShift with few simple commands only. On Linux you can refer to Daniel’s post. Here is the Windows version. Oh, and Daniel did that to run Postgres but my goal is to run an Oracle container of course. Or MySQL maybe….
In the Oracle Cloud PaaS you have a marketplace where you can choose your service. Some are packaged from Bitnami and available on multiple OS. My first idea is that in PaaS you do not care about the OS. But Oracle Cloud has this very nice feature where you still have full access to the OS, as root, even in PaaS. Then, you choose the Linux distribution of your preference. Except if performance is different….
The Autonomous Data Warehouse Cloud service is a PaaS managed service where we have a PDB and an ADMIN user which has most of the system privileges. For example, we have the privilege to change initialization parameters: SQL> select * from dba_sys_privs where grantee=user and privilege like ‘ALTER S%'; GRANTEE PRIVILEGE ADMIN_OPTION COMMON INHERITED ——- ——— ———— —— ——— ADMIN ALTER SESSION YES NO NO ADMIN ALTER SYSTEM YES NO NO Still, not everything…
Mike Dietrich has blogged recently about upuserxt.lst and upobjxt.lst and how to query them with external table. The first time I’ve seen those ‘.lst’ files, the default extension for sqlplus spool files, I wondered whether they were provided in ?/rdbms/admin on purpose, or if they were just some leftovers from some tests Oracle did before packaging the Oracle Home. Finally, I realized that they were there on purpose and that those ‘.lst’ are important files…
