Join Shree Nair, Product Manager at Webyog, as he demonstrates the new ‘Audit Log Analysis’ feature introduced in Monyog v8.5.0 and rolls out the roadmap for the upcoming releases.

Date & Time: Wednesday, March 21, 2018 at 11:00 am EDT

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What to expect from the webinar?

– Quick walkthrough of Audit Log feature on a live Monyog instance.

– You will learn about the upcoming product roadmap for Monyog.

– You can take part in Q&A session and submit your feature requests too.

If you can’t attend this webinar live, register anyway and we’ll send you a link to the recording.

You can …

Join Percona Chief Evangelist Colin Charles as he covers happenings, gives pointers and provides musings on the open source database community.

Have you registered for Percona Live already? The tutorial grid, the schedules for day 1 and day 2 are pretty amazing, and there is even an extra track being added, for a total of 10 concurrent/parallel tracks during day 1 & day 2. If you submitted a talk and it didn’t get accepted (competition was high), you should have received a discount code to register for the event.

I plan to write more dedicated blog posts around M|18 and the MariaDB Developer’s …

I promised to do a pricing post on the Amazon RDS Aurora MySQL pricing, so here we go.  All pricing is noted in USD (we’ll explain why)

We compared pricing of equivalent EC2+EBS server instances, and verified our calculation model with Amazon’s own calculator and examples.  We use the pricing for Australia (Sydney data centre). Following are the relevant Amazon pricing pages from which we took the pricing numbers, formulae, and calculation examples:

• Amazon EC pricing (on demand)
• Amazon EBS pricing
• Amazon RDS Aurora pricing (on demand)
• Amazon AWS calculator tool …

In our last blog, we had a look at MySQL 8 and mentioned new features available here. However, some of those features are already in MariaDB and have been for a while. We will here compare database roles in both server dialects.

The Purpose of Database Roles

It’s common for numerous users within an organization to share the same database privileges. A role bundles a number of privileges together so that the DBA can set the privileges for a group of users all at once, rather than having to set each user’s privileges individually.  

With shared applications, it is not uncommon for multiple users to share the same user account. The drawback to this arrangement is that there is no way to see which actual user was responsible for which action.

Roles make managing this much easier. For example, there …

Please join Percona’s Build / Release Engineer, Mykola Marzhan, as he presents Monitoring Amazon RDS with Percona Monitoring and Management on February 27, 2018, at 7:00 am PST (UTC-8) / 10:00 am EST (UTC-5).

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Are you concerned about how you are monitoring your AWS environment? Keeping track of what is happening in your Amazon RDS deployment is key to guaranteeing the performance and availability of your database for …

Join Percona Chief Evangelist Colin Charles as he covers happenings, gives pointers and provides musings on the open source database community.

I think the biggest news from Percona-land is that besides the tutorial grid, the schedule for day 1 and day 2 are live! Also notice the many “sub-themes”: a 101 track, using MySQL, MongoDB, cloud, MySQL database software, PostgreSQL, containers & automation, monitoring & ops, and misc. database stuff. Learn from 107 different experts (this number is likely to increase). So register now.

This coming week, Peter Zaitsev, Tom Basil, and I will be …

Recently we faced an issue where the config management software had automatically upgraded the mariadb-server-10.1 package to the latest 10.1.31 version. This upgrade broke the galera cluster setup for this installation.

I’ve started to recreate this issue in my local lab setup and I managed to reproduce this problem.

I have created a 3 node galera setup: galera1 (192.168.55.100), galera2 (192.168.55.101) and galera3 (192.168.55.102). All 3 servers run MariaDB-10.1.30. Galera replication is working fine.

This is the basic galera config:

# cat /etc/mysql/conf.d/cluster.cnf
#########################################################
# Galera config
#########################################################

[mysqld]
wsrep_on                                  = ON
wsrep_provider                            = /usr/lib/libgalera_smm.so
wsrep_provider_options                    =
wsrep_cluster_name                        = …

In Amazon space, any EC2 or Service instance can “disappear” at any time.  Depending on which service is affected, the service will be automatically restarted.  In EC2 you can choose whether an interrupted instance will be restarted, or left shutdown.

For an Aurora instance, an interrupted instance is always restarted. Makes sense.

The restart timing, and other consequences during the process, are noted in our post on Aurora Failovers.

Aurora Testing Limitations

As mentioned earlier, we love testing “uncontrolled” failovers.  That is, we want to be able to pull any plug on any service, and see that the environment as a whole continues to do its job.  We can’t do that with Aurora, because we can’t control the essentials:

• power button;
• reset switch;
…

The conference session schedule for the seventh annual Percona Live 2018 Open Source Database Conference, taking place April 23-25 at the Santa Clara Convention Center in Santa Clara, CA is now live and available for review! Advance Registration Discounts can be purchased through March 4, 2018, 11:30 p.m. PST.

Percona Live Open Source Database Conference 2018 is the premier open source database event. With a theme of “Championing Open Source Databases,” the conference will feature multiple tracks, including MySQL, MongoDB, Cloud, PostgreSQL, Containers and Automation, Monitoring and Ops, and Database Security. Once again, Percona will be …

Right now Aurora only allows a single master, with up to 15 read-only replicas.

Master/Replica Failover

We love testing failure scenarios, however our options for such tests with Aurora are limited (we might get back to that later).  Anyhow, we told the system, through the RDS Aurora dashboard, to do a failover. These were our observations:

Role Change Method

Both master and replica instances are actually restarted (the MySQL uptime resets to 0).

This is quite unusual these days, we can do a fully controlled role change in classic asynchronous replication without a restart (CHANGE MASTER TO …), and Galera doesn’t have read/write roles as such (all instances are technically writers) so it doesn’t need role changes at all.

Failover Timing

Failover between running instances takes about 30 seconds.  This is in line with information provided in the …