The Challenge Often with sensitive information, you need to have an audit log. Not just that a table had a select run, but that specific cells within the table were accessed.  Frequently data such as this will contain a classification level as part of the row, defining policies for how it is handled, audited, etc.… Facebook Twitter LinkedIn

I recently watched a fantastic Python Pandas library tutorial series on YouTube. Without a doubt, Pandas is great for all sorts of data stuff. On the same token, MySQL Shell in Python mode is quite powerful in the sense that Python and the MySQL Shell (version >= 8.0) are somewhat united in the same environment. Although Pandas is in a league all its own when it comes to data analysis, between the power of MySQL and Python, we can also perform some basic analysis easily in MySQL Shell Python mode. In this blog post, I will cover some basic data analysis using Python mode in the MySQL Shell. Continue reading to see examples…

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OS, Software, and DB used:

• OpenSuse Leap …

ARM processors are fast gaining popularity in the High Performance Computing (HPC) space with multiple cloud providers providing powerful and flexible variants of ARM instances to boot. Users are still in a dilemma about whether running MySQL on ARM is really effective? To help ease this out we introduce a Cost-Performance-Model (#cpm). Model is generic in nature to help normalize computing configuration based on cost and could be used for other HPC kinds of software too.

USP of ARM

ARM is all about a lot of cores (may be less powerful compared to x86) running with lesser power there-by effectively generating cost savings. Let’s understand this fact with some data-points.

Above table shows that booting ARM resources on any cloud-provider is cost effective (compared to x86).

Key is to find out if the said saving could be realized when running software. This sounds easy, just run the same version …

If you are using XA transactions, then you’ve likely run into a few replication issues with the 2PCs (2 Phase Commits). Here is a common error we see in Percona’s Managed Services and a few ways to handle it, including injecting an empty XA transaction.

Last_Error: Error 'XAER_NOTA: Unknown XID' on query. Default database: 'punisher'. Query: 'XA COMMIT X'1a',X'a1',1'

What Does it Mean?

It means that replication has tried to commit an XID (XA transaction ID) that does not exist on the server. We can verify that it does not exist by checking:

replica1 [localhost:20002] {msandbox} ((none)) > XA RECOVER CONVERT XID;
+----------+--------------+--------------+--------+
| formatID | gtrid_length | bqual_length | data   |
+----------+--------------+--------------+--------+
|        1 |            1 |            1 | 0x2BB2 | …

In a recent article, I explained how to test MySQL Database Service (aka MDS) on OCI without having to setup a VPN.

A VPN is the recommended way and of course using some man-in-the-middle exposing the MySQL Classic and X Protocol port is something you should absolutely avoid !

So, in this article we will see another way to test or use MDS without VPN but using a more secure option.

SSH

The solution uses a SSH tunnel between your machine (laptop, etc..) and OCI.

How does it work ?

We have a MDS instance (10.0.1.3), and a compute instance (10.0.0.2). The compute instance is in the public subnet and has a public IP assigned to it.

Then we open a SSH tunnel to the compute instance’s public IP that forward all traffic to a certain port on localhost (we will use 3406) …

Author Andriy Lysyuk.

The unDROP for InnoDB tool can be used to recover corrupt MySQL databases. In this post, we will show how to repair a MySQL database if its files got corrupted and even innodb_force_recovery=6 doesn’t help.

The corruption of InnoDB tablespace may be caused by many reasons. A dying hard drive can write garbage, thus, page checksum will be wrong. InnoDB then reports to the error log:

InnoDB: Database page corruption on disk or a failed
InnoDB: file read of page 4.

MySQL is well known for its poor start-up script. A simple upgrade procedure may end up with two mysqld processes writing to the same tablespace. That leads to corruption too. Sometimes, power reset corrupts not only the InnoDB files, but the whole file system becomes unusable for …

MySQL 8.0 General Availability release was launched in April 2018, and since then there have been ten versions of MySQL 8 and Percona Server for MySQL released. The MySQL Community expressed a high opinion of the MySQL 8.0 advantages, so a lot of databases have been successfully upgraded to the new version. But many of them still need to be up to date.

Percona has prepared a free course “How to Upgrade to MySQL 8.0” that helps you with this task.

It is a series of useful videos for 3-4 minutes. At the end of the course, you can pass the QUIZ and get a certificate. 

Follow the link to take the course:  https://classroom.google.com/c/MTM2MDIyNDIzMDQy?cjc=zjsst4l

You can also join the course manually. Just open Google Classroom and click “Join class” and enter the code of the class “zjsst4l”. …

 Launching Your First MySQL DB System

Step 1 - Pre-requisites

1.    1.     Create a compartment and user group to organize the resources and access. In this example, we create a compartment named as MySQL_Sandbox, and a group MySQL_Test_Group. Log-in the Console as an Administrator, under the Identity menu, create a MySQL_Sandbox compartment, and a …

 Using MySQL Enterprise Workbench to write SQL statements against MDS

Assume that you wanted to access/write sql statements on MDS from MySQL Workbench Running on On-premises (Windows OS)

How? Below are steps you needed to follow.

To connect with MySQL Workbench ,you require below details handy :-

Prerequisite:-

Guide to Migrate Production MySQL Database running on On-premises to Oracle Cloud MySQL Database Service(MDS) ?

I have one production database which i would like to migrate into Oracle Cloud PaaS model i.e MySQL Database Service , we will walk through on how to migrate customerDB database from On-premises to Oracle Cloud MySQL Database Service(MDS).

Note:- Recommended is to have MySQL DB On-Premises and MDS  both must have same version i.e 8.0 and Utility shell MySQL shell must be 8.0.21 onwards.

make sure app is disconnected and not allowing any traffic during the migration process.

We will use two new features introduced with latest release of MySQL 8.0.21.

1.       Dump Schema Utility

a.       This will help us to take the backup from On-promises database and export  to Oracle Cloud Object …