Meaningful availability

The Morning Paper

Meaningful availability , Hauer et al., > A good availability metric should be meaningful, proportional, and actionable. By "proportional" we mean that a change in the metric should be proportional to the change in user-perceived availability.

Managing High Availability in PostgreSQL – Part III: Patroni

Scalegrid

In the final post of this series, we will review the last solution, Patroni by Zalando, and compare all three at the end so you can determine which high availability framework is best for your PostgreSQL hosting deployment. Managing High Availability in PostgreSQL – Part I: PostgreSQL Automatic Failover. Managing High Availability in PostgreSQL – Part II: Replication Manager. Managing High Availability in #PostgreSQL – Part III: Patroni vs. PAF vs. repmgr Click To Tweet.

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Configuring SQL Server Always On Availability Groups on AWS EC2

SQL Shack

In this article, we will review how to set up multi-subnet Always On Availability groups using AWS EC2 instances and AWS FSx as file share witness. AlwaysOn Availability Groups Clustering High Availability

Davis AI now detects infrastructure availability issues as root cause

Dynatrace

Having been named as a Leader in the 2020 Gartner APM Magic Quadrant for the 10 th consecutive time proves that Dynatrace is the best-of-breed application performance monitoring tool available. This capability eliminates the need for default trigger events for process availability issues.

Dynatrace Managed turnkey Premium High Availability for globally distributed data centers (Early Adopter)

Dynatrace

Dynatrace Managed is intrinsically highly available as it stores three copies of all events, user sessions, and metrics across its cluster nodes. Our Premium High Availability comes with the following features: Active-active deployment model for optimum hardware utilization.

MySQL High Availability Framework Explained – Part III: Failover Scenarios

High Scalability

In this three-part blog series, we introduced a High Availability (HA) Framework for MySQL hosting in Part I, and discussed the details of MySQL semisynchronous replication in Part II. The Corosync and Pacemaker framework detects that the master MySQL is no longer available.

Managing High Availability in PostgreSQL – Part II

Scalegrid

Are you deploying PostgreSQL in the cloud and want to understand your options for achieving high availability? In our previous blog post, Managing High Availability in PostgreSQL – Part I , we discussed the capabilities and functioning of PostgreSQL Automatic Failover (PAF) by ClusterLabs. Managing High Availability in #PostgreSQL – Part II: Open Source repmgr Tool Click To Tweet. High Availability Test Scenarios.

Read Scale Availability Group in a clusterless availability group

SQL Shack

In this article, we will explore configuring Read Scale Availability Group that does not require a failover clustering configuration. Introduction SQL Server Always On is a high availability and disaster recovery solution available starting from SQL Server 2012.

SQL Server Always On Availability Groups Interview Questions & Answers

SQL Shack

In this article, we will discuss a number of interview questions that you could be asked about the SQL Server Always On Availability Groups feature when attending an interview for the SQL Server database administrator role. AlwaysOn Availability Groups SQL interview questions

MySQL High Availability Framework Explained – Part II: Semisynchronous Replication

Scalegrid

In Part I , we introduced a High Availability (HA) framework for MySQL hosting and discussed various components and their functionality. Semisynchronous replication, which is natively available in MySQL, helps the HA framework to ensure data consistency and redundancy for committed transactions. Let’s discuss some of the key MySQL settings used to ensure optimal behavior for high availability and data consistency in our framework.

Automatic Seeding in Always On Availability Groups

SQL Shack

Introduction In SQL Server Always On Availability Groups, we can add a database into an existing availability group using different methods. Full Database and Log backup: It starts data synchronization by taking full and log backup for the availability group database.

ScaleGrid Fully Managed Hosting for Redis™ Now Available on Azure

Scalegrid

It’s crucial for organizations to properly configure their Redis™ deployments for high availability and disaster recovery, as a couple minutes of downtime can be detrimental to a company’s security and reputation.”. ScaleGrid is the only cloud hosting service for Redis™ that allows you to customize your master-slave and cross-datacenter configurations for 100% uptime and availability across 30 different Azure regions. PALO ALTO, Calif.,

Azure 100

Highly Available Redis Clusters with Automated Sharding Launches at ScaleGrid

Scalegrid

Redis Cluster is the native sharding implementation available within Redis, an open-source in-memory data structure project, that allows you to automatically shard across multiple Redis nodes without having to rely on external tools and utilities. This is available in addition to their Redis replica set solutions that make it easy to spread out your reads across multiple nodes. Some of the advanced benefits of Redis Clusters include: High Availability. PALO ALTO, Calif.,

Isolation levels behavior in SQL Server Always On Availability Groups

SQL Shack

In my previous article, Data synchronization in SQL Server Always On Availability Groups, we explored the internal data synchronization for both Asynchronous and Synchronous data commit mode. AlwaysOn Availability Groups High Availability

SQL Server Transaction Log and High Availability Solutions

SQL Shack

AlwaysOn Availability Groups High Availability Transaction log

SQL Server Statistics in Always On Availability Groups

SQL Shack

AlwaysOn Availability Groups High Availability PerformanceIntroduction to SQL Server Statistics SQL Server Statistics are an essential part of query performance in SQL Server. They help the query optimizer to prepare a query plan using the distribution of values in participating rows.

Data synchronization in SQL Server Always On Availability Groups

SQL Shack

This article describes the data synchronization process on SQL Server Always On Availability Groups in both Synchronous, and Asynchronous data commit mode. High data availability is an important aspect of every DBA’s life. AlwaysOn Availability Groups High Availability

SQL Server Always On Availability Group Data Resynchronization

SQL Shack

In my previous article Data Synchronization in SQL Server Always On Availability Group, we described a scenario where if a secondary replica goes down in synchronous data commit mode, SQL Server Always on Availability group changes to asynchronous data commit mode.

MySQL High Availability Framework Explained – Part II

High Scalability

In Part I, we introduced a High Availability (HA) framework for MySQL hosting and discussed various components and their functionality. Now in Part II, we will discuss the details of MySQL semisynchronous replication and the related configuration settings that help us ensure redundancy and consistency of the data in our HA setup.

Automated full-stack monitoring for SUSE CaaS 3.0 now available

Dynatrace

which is available as of now. CPUs are still available for running additional containers. now available appeared first on Dynatrace blog. Dynatrace news. SUSECON 2019 took place a couple of weeks ago in Nashville, Tennessee.

High Availability in Mule 4: Using Clusters

DZone

Mule Enterprise Edition supports scalable clustering to provide high availability (HA) for applications. For a business interested in being available at all times, HA clustering is a practical solution.

Start monitoring your web application’s availability with one click

Dynatrace

Availability monitoring —Is my application working 24 x 7? With the latest release of Dynatrace, we’ve made it super easy to start monitoring your application’s availability using synthetic monitors. Just select Monitor availability and you‘re done! Dynatrace news.

Windows Failover Cluster Quorum Modes in SQL Server Always On Availability Groups

SQL Shack

This article gives an overview of Windows Failover Cluster Quorum modes that is necessary for SQL Server Always on Availability Groups. Introduction SQL Server Always On is a flexible design solution to provide high availability (HA) and disaster recovery (DR).

Apply Transaction Logs to Secondary in SQL Server Always On Availability Group

SQL Shack

Introduction SQL Server Always On Availability Groups provides HADR solutions for the SQL databases. Here HA refers to high availability and DR refers to disaster recovery. The priority of this feature is to keep the database highly available and then provide Disaster recovery.

SQL replication with publisher database in Always On Availability Groups

SQL Shack

In this article, we will review how to setup SQL replication with publisher database in Always On availability groups so that replication continuous to sync even after failover to the secondary server in the availability group. The following are the steps involved in setting up SQL Server replication with publisher database in Always on Availability […]. AlwaysOn Availability Groups High Availability Replication

Max Worker Threads for SQL Server Always on Availability Group databases

SQL Shack

This article gives an overview of the Max Worker Threads for the SQL Server Always On Availability Group databases. SQL Server Always On Availability Group is a widely accepted feature to implement high availability and disaster recovery solution (HADR).

Configuring a SQL Server AlwaysOn High Availability Group

SQL Shack

In this article, we will learn the step by step configuration of SQL Server AlwaysOn High availability Group for two nodes. AlwaysOn Availability GroupsOnce nodes are added to the cluster group, we will able to use the AlwaysOn feature in the SQL server.

HTTP synthetic monitoring now available for Windows-based ActiveGates

Dynatrace

Support for Windows-based ActiveGates is now available with ActiveGate version 1.165. Internal application availability monitoring. Note that this first GA version of synthetic HTTP monitors is available only for environment ActiveGates. Dynatrace news.

General availability of OneAgent full-stack monitoring for AIX

Dynatrace

We’re proud to announce the general availability of OneAgent full-stack monitoring for the AIX operating system. Monitoring IBM Power Systems isn’t a simple task, due to its specific architecture, there aren’t many tools available on the market. Dynatrace news.

Automated full-stack monitoring for SUSE CaaS 3.0 now available

Dynatrace

which is available as of now. CPUs are still available for running additional containers. now available appeared first on Dynatrace blog. Dynatrace news. SUSECON 2019 took place a couple of weeks ago in Nashville, Tennessee.

A walk-through of moving database file in SQL Server Always On Availability Group

SQL Shack

SQL Server Always On Availability Groups feature provides high availability (HA) and disaster recovery solutions. We can add multiple databases in a single Always on Availability Group on SQL Server Enterprise edition. AlwaysOn Availability Groups High AvailabilityBefore we add a database in the AG group, we need to use the following checklist. Checklist to add a database in SQL […].

Important Health Checks for your MySQL Master-Slave Servers

Scalegrid

In a MySQL master-slave high availability (HA) setup, it is important to continuously monitor the health of the master and slave servers so you can detect potential issues and take corrective actions. The monitoring program or script must alert the high availability framework in case any of the health checks fails, enabling the high availability framework to take corrective actions in order to ensure service availability.

MySQL High Availability Framework Explained – Part III: Failure Scenarios

Scalegrid

In this three-part blog series, we introduced a High Availability (HA) Framework for MySQL hosting in Part I, and discussed the details of MySQL semisynchronous replication in Part II. Now in Part III, we review how the framework handles some of the important MySQL failure scenarios and recovers to ensure high availability. The Corosync and Pacemaker framework detects that the master MySQL is no longer available.

Simulating a Multi Subnet cluster for setting up SQL Server Always On Availability Groups – lab setup

SQL Shack

Creating such an environment should help creating Availability groups simulating a far replica residing in a different Data Center (Subnet) acting as a disaster recovery site in your lab for learning/experimenting real world […]. AlwaysOn Availability Groups High AvailabilityIn this article, we are going to see how to create a multi subnet cluster spanning across multiple subnets for lab purposes.

PostgreSQL Connection Pooling: Part 3 – Pgpool-II

Scalegrid

It supports high-availability, provides automated load balancing, and has the intelligence to balance load between masters and slaves so write loads are always directed at masters, while read loads are directed to slaves.

The Best Way to Host MySQL on Azure Cloud

Scalegrid

In this post, we outline the best way to host MySQL on Azure , including managed solutions, instance types, high availability replication, backup, and disk types to use to optimize your cloud database performance. The first thing to consider when weighing between self-management and a MySQL Database-as-a-Service (DBaaS) solution is what internal resources you have available. High Availability Deployment. So, how do we configure high availability for MySQL on Azure?

Azure 153

Speed Index now available

Speed Curve

Speed Index is now available on SpeedCurve. Choose "SpeedIndex" from the top right of the main graphs. Speed Index is an important measure of a user's experience as the page loads. It's based on video analysis of how the page loads over time.

Juniper Networks ActiveGate extension now available (EAP)

Dynatrace

The post Juniper Networks ActiveGate extension now available (EAP) appeared first on Dynatrace blog. Dynatrace news. Juniper Network devices help enterprises connect and secure their applications, data, and services.

Lighthouse scores now available in your test results

Speed Curve

In the year since Google rolled out Lighthouse, it's safe to say that "Will you be adding Lighthouse scoring?" is one the most common questions we've fielded here at SpeedCurve HQ.

2019 Database Trends – SQL vs. NoSQL, Top Databases, Single vs. Multiple Database Use

Scalegrid

That’s why it’s critically important to implement a high availability framework for your production deployments to keep your databases online if there’s an outage in one of your datacenters. The more memory you have available, the better your database should perform.

How to display a "new version available" for a Progressive Web App

Dean Hume

Have you ever been on a website and noticed a popup notification that suggests that there is a new version of the site available? In this article, I will show you how to add a notification to your site and display it each time that there is a new version of the service worker available.

What is Greenplum Database? Intro to the Big Data Database

Scalegrid

As a database tailored towards enterprise workloads, this provides the ability needed to explore large data sets along with the high performance achieved by paralleling the analytics across your available segment hosts.

AWS Launch Wizard for quick SQL Server Always On deployments

SQL Shack

SQL Server Always On is a high-availability and disaster recovery solution. For on-premises infrastructure, you can follow articles here, AlwaysOn Availability Groups, and configure SQL Server always-on functionality. AlwaysOn Availability Groups AWS RDS High Availability

AWS 66