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How to Patch Without the Pause: Near-Zero Downtime with HA

June 3, 2025 by Jason Aw Leave a Comment

How to Patch Without the Pause: Near-Zero Downtime with HA

Protecting Critical Systems from Downtime & Disasters

This white paper explores how organizations can overcome the downtime risks traditionally associated with patch management by integrating high availability (HA) clustering solutions. It explains how SIOS LifeKeeper and DataKeeper software enable a rolling update process, allowing patches to be tested and applied on secondary nodes without interrupting production systems. This approach minimizes downtime, reduces the risk of patch failures, and ensures compliance with cybersecurity regulations like HIPAA and PCI DSS.

Reproduced with permission from SIOS

Filed Under: Clustering Simplified Tagged With: High Availability, Patch Management

SIOS LifeKeeper Demo: How Rolling Updates and Failover Protect PostgreSQL in AWS

May 27, 2025 by Jason Aw Leave a Comment

SIOS LifeKeeper Demo: How Rolling Updates and Failover Protect PostgreSQL in AWS

This week, Dave Bermingham, Director of Customer Success at SIOS Technology, walks through how LifeKeeper for Linux delivers high availability for PostgreSQL databases running in AWS.

High availability (HA) and zero-downtime maintenance have long been holy grails for enterprises running mission-critical databases in the cloud. Dave recently showcased how  LifeKeeper for Linux solution tackles these challenges for PostgreSQL databases in AWS. The demo, centered on minimizing downtime during planned maintenance and automating recovery from unplanned failures, highlights the growing demand for resilient cloud architectures.

Reproduced with permission from SIOS

Filed Under: Clustering Simplified Tagged With: High Availability

SIOS Technology to Demonstrate High Availability Clustering Software for Mission-Critical Applications at Red Hat Summit, Milestone Technology Day and XPerience Day, and SQLBits 2025

May 18, 2025 by Jason Aw Leave a Comment

SIOS Technology to Demonstrate High Availability Clustering Software for Mission-Critical Applications at Red Hat Summit, Milestone Technology Day and XPerience Day, and SQLBits 2025

All practitioners are invited to provide input on high availability and disaster recovery trends as SIOS gathers insights for its 2025 HA/DR Practices Survey Report

SAN MATEO, Calif. – May 6, 2025 – SIOS Technology Corp., a leading provider of application high availability (HA) and disaster recovery (DR) solutions, today announced it will demonstrate its high availability clustering software for business-critical applications at four leading technology events this spring. SIOS also announced that it is inviting all IT practitioners to participate in its newly launched 2025 HA/DR Practices Survey, designed to gather insights into current trends, challenges, and strategies for ensuring application uptime and data protection

  • Milestone Technology Day 2025 Benelux – May 8, 2025 – Eindhoven-Best, Netherlands
  • Red Hat Summit – May 19–22, 2025, Boston, MA – Booth #854
  • Milestone XPerience Day – June 4, 2025, London, UK
  • SQLBits 2025 – June 18–21, 2025, ExCeL London, UK

At each event, SIOS experts will demonstrate how SIOS LifeKeeper and DataKeeper software provide high availability and disaster recovery for critical applications like SQL Server, SAP, and Oracle. Attendees will learn how SIOS clustering software ensures application uptime, eliminates data loss, and simplifies HA/DR across physical, virtual, cloud, and hybrid environments.

SIOS clustering software enables IT teams to create highly available application environments without the need for shared storage. Through intelligent application monitoring, real-time data replication, and automated failover and recovery, SIOS ensures business continuity with minimal complexity and reduced cost. With support for Windows and Linux in any infrastructure, SIOS solutions are trusted by enterprises worldwide to protect mission-critical operations.

SIOS Launches Survey to Gather Insights on HA/DR Practices

As part of its commitment to advancing resilience strategies in the enterprise, SIOS is launching its 2025 HA/DR Practices Survey to collect insights into the challenges, priorities, and real-world strategies used by IT professionals to ensure application uptime and data protection. The results will be compiled into the SIOS 2025 State of High Availability and Disaster Recovery Report, providing valuable benchmarks for the industry.

All practitioners, including attendees of the Red Hat Summit, Milestone Technology Day, Milestone XPerience Day, and SQLBits, are invited to participate in the survey here.

# # #

About SIOS Technology Corp.

SIOS Technology Corp. high availability and disaster recovery solutions ensure availability and eliminate data loss for critical Windows and Linux applications operating across physical, virtual, cloud, and hybrid cloud environments. SIOS clustering software is essential for any IT infrastructure with applications requiring a high degree of resiliency, ensuring uptime without sacrificing performance or data – protecting businesses from local failures and regional outages, planned and unplanned. Founded in 1999, SIOS Technology Corp. (https://us.sios.com) is headquartered in San Mateo, California, with offices worldwide.

SIOS, SIOS Technology, SIOS DataKeeper, SIOS LifeKeeper and associated logos are registered trademarks or trademarks of SIOS Technology Corp. and/or its affiliates in the United States and/or other countries. All other trademarks are the property of their respective owners.

Media Contact:

Beth Winkowski
Winkowski Public Relations, LLC for SIOS
978-649-7189
bethwinkowski@US.SIOS.com

Reproduced with permission from SIOS

Filed Under: Clustering Simplified Tagged With: High Availability

Application Intelligence in Relation to High Availability

May 12, 2025 by Jason Aw Leave a Comment

Application Intelligence in Relation to High Availability

Application Intelligence in Relation to High Availability

Application Intelligence in the context of High Availability (HA) refers to the system’s ability to understand and respond intelligently to the behavior and health of applications in real time to maintain continuous service availability.

What is Application Intelligence?

So, what is Application Intelligence? Application intelligence involves monitoring, analyzing, and reacting to several factors. These can include application state, like whether the application is up or down? Performance metrics include response time, error rates, throughput, and memory usage. Application dependencies, such as databases or external services. Lastly, they look at user behavior or patterns. Using Application Intelligence takes a more holistic view of the application. It uses various data points to make educated decisions about the state of the application itself, not just the infrastructure. Let’s take the example of a web server; it’s not simply enough to know if the server is running, but is the site accessible without any errors? Is the response slow at all? Are users refreshing multiple times and trying to access it? Is the database the website relies on also up and running and accessible?  All the above are examples of the factors that application intelligence considers to be successful.

How LifeKeeper Uses Application Intelligence

So, how does LifeKeeper use application intelligence to enhance high availability for critical applications? Let’s break it down.  LifeKeeper uses application-specific recovery kits (ARKs) that contain knowledge for each application (SAP, SQL, PostgreSQL, Oracle, etc.). This allows LifeKeeper to handle the startup/shutdown procedures of each application, monitor the health and status of both the application and any dependencies, as well as orchestrate intelligent failover/failback operations without corrupting any data. Users can group together related resources in a hierarchical relationship within LifeKeeper, which allows LifeKeeper to understand the dependencies between different application components (when a service relies on an IP or database, for example). This ensures LifeKeeper failovers happen in the correct order and recovery actions don’t break the application or leave it in an inconsistent or broken state.

Additionally, LifeKeeper does deep health checks, not just determining if the server is up, but also more detailed checks, such as whether a database is accepting connections or if a web service is returning expected responses. It can even monitor if certain expected background processes are running. LifeKeeper also uses application-specific configuration files to ensure data configuration consistency across nodes and that application settings are preserved or restored correctly.  Lastly, LifeKeeper has the ability to use custom scripts to further fine-tune these deep checks to support less common or homegrown applications intelligently as well.

PostgreSQL ARK: A Real-World Example of Application Intelligence

To take a deeper dive, we can look at how PostgreSQL ARK uses Application Intelligence.  The PostgreSQL ARK uses specific logic to monitor, start, stop, and failover PostgreSQL via knowledge of the specific PostgreSQL startup and shutdown commands, awareness of critical config files like postgresql.conf and pg_hba.conf and understanding the data directory layout and lock file behavior.

Intelligent Monitoring and Ordered Failover for PostgreSQL

Additionally, it doesn’t just check that PostgreSQL is running, it also checks if the database is responding to queries, the correct data directory is accessible, and if there is any corruption in the transaction logs?  It uses dependency tracking to make sure that the resources PostgreSQL often depends on are available such as the Virtual IP for client connections and the mounted storage for its data directory.  This ensures that LifeKeeper can bring up the resources in the correct order in case of a failover, such as mounting the disk first, bringing up the IP, and then starting PostgreSQL before verifying the service health.

Preventing Split-Brain and Ensuring Data Integrity

Lastly, LifeKeeper uses application intelligence to avoid split-brain (a phenomenon where more than one node thinks it’s the ‘primary’ node) scenarios by avoiding starting two active PostgreSQL servers with the same data directory and avoiding data corruption by not failing over when writes are still in progress. These are examples of all the different ways LifeKeeper and the various ARKs have implemented application intelligence to make the combined product as resilient as possible.

Strengthen Application Resilience with Intelligent High Availability

In summary, LifeKeeper’s built-in application intelligence enables precise, fast, and reliable failover and recovery by understanding how applications behave and what they need to run correctly.

Ensure application resilience and uninterrupted service—request a demo or start your free trial today to experience how SIOS LifeKeeper uses application intelligence to protect your critical workloads.

Author: Cassy Hendricks-Sinke, Principal Software Engineer, Team Lead

Reproduced with permission from SIOS

Filed Under: Clustering Simplified Tagged With: Application availability, High Availability

Are my servers disposable? How High Availability software fits in cloud best practices

May 2, 2025 by Jason Aw Leave a Comment

Are my servers disposable How High Availability software fits in cloud best practices

Are my servers disposable? How High Availability software fits in cloud best practices

In this VMblog article, “Are my servers disposable? How High Availability software fits in cloud best practices,” Philip Merry, a software engineer at SIOS Technology, explores how the shift to cloud computing has changed the role and perception of servers in modern IT environments. With the rise of automation and infrastructure-as-code, servers have become increasingly disposable, easily created, destroyed, and replaced, aligning with cloud best practices like those outlined in the AWS Well-Architected Framework. However, Merry emphasizes that while infrastructure can be treated as temporary, the applications running on it remain critical and must be continuously available. To bridge this gap, high availability (HA) software plays a vital role, allowing IT teams to maintain uptime and reliability by decoupling application continuity from the underlying server hardware. This approach empowers organizations to embrace the flexibility of cloud environments without compromising on the stability and performance of their essential applications.

Author: Beth Winkowski, SIOS Technology Corp. Public Relations

Reproduced with permission from SIOS

Filed Under: Clustering Simplified Tagged With: Amazon AWS, High Availability

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