high availability

The concept of a resource group is used here in a larger sense than just as a high-availability entity.

A system can achieve high availability without being fault tolerant if it can be built in such a way that it never experiences any faults.

Informix Growth Edition supports up to two high-availability cluster secondary nodes of any type.

High availability for your end users, enabling you to realize a return on your company's IT investment.

As shown, the scalability with high availability topology was able to run twice the throughput of the golden topology.

Are you looking for a high availability solution for your business which is always ready to switch?

We'll start out by discussing a few terms and concepts that are important to understand when discussing high availability.

Moving a SOAP-based Web service into a production environment requires assurances of high availability and consistently good performance.

One of the first steps toward achieving high availability is to review the SLA that you have established for your organization.

Specifies the address of the High Availability (HA) Failover server to be used in the event of a connection loss .

A core group is a static high availability domain that consists of a set of tightly coupled WebSphere Application Server processes.

Large clusters of machines can be seamlessly integrated into a single cache providing high availability to data.

Setting high availability goals is the responsibility of many parties , and these goals must be appropriate to all stakeholders .

One of the goals of cloud computing is to provide high availability to compute resources at the lowest possible overhead.

It communicates with hypervisors to understand their capacity, and also takes into account high availability concerns.

The whole process can be achieved within a few minutes, thereby enabling simple high availability.

Note that the current policy that governs transactional high availability can be identified by the type = WAS_TRANSACTIONS match criteria.

For those installations where high availability (HA) is a requirement, WebSphere Portal can be installed in a cluster configuration.

The high availability increases the usage. Reducing the availability redirects you to take another, hopefully more useful path.

Critical database applications demand a robust strategy for the preventing data loss and guaranteeing high availability of your data store.

In traditional database deployments database replication techniques are commonly used to achieve high availability.

Two features of Encryption Expert that help you to ensure high availability are the use of failover servers and encryption key caching.

It's important to understand that Live Application Mobility does not replace High Availability.

Lack of any persistent data makes high availability non-critical for these machines.

Please note that for sake of simplicity, the tests described do not include the optional dual-node high availability feature.

Presto is basically a set of WAR files that run on Tomcat container with a high availability (HA) database ( MySQL) with failover.

Multiple instances of WebSphere InterChange Server can be deployed and a high availability model is provided.

Mirroring ensures that two separate copies of the data exist at all times, providing high availability and complete data redundancy.

A well designed and implemented backup and restore strategy is essential to any high-availability solution.

Also, as you plan for capacity, consider any requirements for failover or high availability.

The high availability cluster configuration is the default configuration created when a cluster of application servers in a cell is created.

By definition, such a core group is also considered as a high availability domain for specific services.

This step applies when you implement High Availability or plan to have multiple coordinator nodes in the system.

The most common is high-availability clustering, which links a second computer to a primary computer to act as a backup.

Critical database applications demand a robust strategy for preventing data loss and guaranteeing high availability of your data store.

Let's discuss a few configuration scenarios that can be used for high availability.

Replication supports high availability by having redundant data at multiple sites, but it does not prevent data corruption from occurring.

CCR is designed to be either a one or two datacenter solution, providing both high availability and site resilience.

As discussed in the previous section, different options are available for performing a rolling upgrade of your high availability cluster.

For high availability, the JITT&D should be installed in a cluster and configured to be active on one server at a time.

On the next panel, check Enable messaging engine policy assistance and High availability options, then click Next.

The Linux-HA project is widely used and is an important component in many interesting high-availability solutions.

High availability management software is the point of HA system.

Let's take a look at the role these three components can play in a high availability environment.

Another level of confusion centers around the terms used in discussions of high availability.

For information about troubleshooting failed resources , see Troubleshooting High Availability Deployments .

Or, new operational procedures might be needed to ensure high availability.

Because HDFS has a single point of failure (the name node), it is a risk for a high availability production system.

If you require multiple proxy servers for high availability and for scalability, it is recommended that you create a proxy cluster.

If transactional high availability is not in use, no requirement exists to specify the transactions recovery log directory.

The goal for the POC was to implement high availability with a target of achieving higher than 99. 999% availability.

Clustering and high-availability architectures are often found in these types of large enterprise environments.

Informix 11. 7 offers one of the industry's most comprehensive sets of high-availability options in a platform-independent environment.

Linux-HA comes with a set of resource agents based on the Open Cluster Framework (OCF), the standard for achieving high availability.

Additionally, high-speed disks or databases (or both) are typically required to increase the size of the cache, or for high availability.

Leverages Amazon's massively redundant architecture to offer extremely high availability in the face of concurrent access.

Continuous Computing provides High Availability platform solutions to telecom equipment manufacturers.

Configure transparent firewall, virtual firewall, and high availability firewall features on a security appliance.

Specifically, server clusters provide failover support and high availability for mission-critical Exchange applications and services.

By using these methods, WebSphere JDBC Adapter ensures high availability and performance of events delivery in an inbound service.

Each of your messages is stored on multiple servers by SQS to provide redundancy and high availability.

Ethernet LAN and Wireless LAN offer high-availability access and reliable communications between the plant and the MES solution .

If Message Broker is installed in a high-availability environment, but Process Server is not, that might sway your decision.

For more information about failover clustering, see Configuring High Availability and Before Installing Failover Clustering.

In this article, you've learned about the flexibility of asynchronous replication using ER and the high-availability features of a cluster.

High-availability multiprocessing systems are generally interactive, often with never-fail real-time on-line performance requirements.

Enterprise Edition Only: High availability and load-balancing configurations using IBM WebSphere Application Server groups.

There was a special need for high availability for this system.

Having each catalog server residing in different physical machines will provide high availability of the catalog service.

This ensures high availability for your SQL management repository.

This article introduced the high availability support for the WebSphere Application Server transaction service.

As one of the important devices for NGN, Signaling Gateway(SG) must have High Availability(HA) of 99.

The goal of achieving high availability is to eliminate scheduled downtime and minimize unscheduled downtime.

The server usability enhancements include features for ease of administration, scalability, and high availability.

Clustering, caching, distribution, etc. High availability, failover.

For more information, see Troubleshooting High Availability Configurations.

SCTP provides features for high availability, increased reliability, and improved security for socket initiation.

IBM solidDB has high availability and load balancing features, as well as advanced replication features.

Maintaining high availability for notification applications.

The resources, or services, that are delivered are governable to ensure things like high availability, security, and quality.

Session replication enables a host of benefits -- load balancing, scalability, fault tolerance, and high availability.

the invention provides the key processing procedure for realizing the high availability of the storage dual controller.

High Availability (HA) solutions exist for every tier in the enterprise and should be explored when planning for availability.

The critical component of the collective responsible for high availability failover is the catalog server.

A reasonable number of catalog servers (three in the present example) will contribute to the high availability of catalog service.

This centralized servlet engine should offer high availability with appropriate failover mechanisms.

The CDMS system architecture comprises clustered servers of high availability, both at the database level and the operating system level.

Note: The procedure is exactly the same whether or not you are exploiting dual node high availability.

The Deployment Environment creation wizard helps you create clusters to provide certain patterns of high availability.

While redundant servers are an additional cost, high availability is achieved through redundant servers should outages occur.

While redundant servers are an additional cost, high availability is achieved through redundant servers should outages occur.

Know that at least two ODRs will be needed for high availability, as shown in Figure 2.

In Part 1 of this series, I introduced you to high availability (HA) concepts and how to install and configure heartbeat.

The PSI-MOS media converters are a natural fit for critical applications that require high availability.

You can create and modify service-level agreements (SLAs) and failover configurations (FOCs) for high availability clusters.

Self-healing scheduling technique is critical for dependability of computer systems and also a guarantee of high availability.

May be distributed across multiple HTTP servers for increased capacity or for high availability.

High availability of your data is a must for the on-demand environment.

Providing redundancy is one strategy for sites with high availability requirements.

More information on these policies can be found in An introduction to high availability policies.

As with bridge interfaces, you must define a minimum of two peer ports (per peer access point) due to high availability reasons.

To implement true high availability, the Balance application would need to be made highly available.

When properly configured, many JMS implementations provide the ability for failover and high availability.

High-availability secondary nodes can be deployed without charge if they are only functioning as backup secondaries.

This supports high availability by improving recovery performance when using fuzzy checkpoints.

The basics of capacity, redundancy and availability introduces the basic concepts involved in designing a high availability solution.

This ensures high availability for your flex clusters.

To determine the best high availability solution, you must understand when your users need the messaging system.

It will also guide the creation of a cluster of Webform Servers and how to establish High Availability for the integrated solution.

J2EE architecture provides middle layer framework, so it is of high availability, high reliability and extensibility.

Protects you against downtime and lost revenue through high availability and secure and reliable connections.

Highly scalable, high availability, cost effectiveness and high performance.

High-availability billing and metering enables improved quality of service based on actual demand in cases where demand can be anticipated.

This section outlines the steps needed to test the high availability of the queue manager, ha. queue. manager.

The high availability cluster requires that the primary and the secondary servers be running the same versions of Informix.

This is called failover -- the mechanism by which high availability is achieved.

Understanding high availability concepts and practices can help you minimize downtime in your messaging environment .

My first exposure to high availability (HA) was in the 1980s, working on a commercial geosynchronous communications satellite.

For more information about managing for high availability, see High Availability Strategies.

High availability is the main features and the fundamental needs of mission-critical network system.

This topology is best suited for server environments requiring high availability and read scalability.

In the past , the High Availability needs the system provide the continuable service and dispose the system hardware fault in time.

The terms availability and high availability can have very different meanings depending on the audience.

WebSphere JDBC Adapter can ensure high availability when processing events delivery in the inbound service.

Use the scalability with high availability topology if high availability and scalability are required.

It provides high availability via automated load balancing, failover, recovery and self-healing.

Automatic failover provides high availability by ensuring that the database is still served after the loss of one server.

The key features of large database systems are consistency, high availability, and scalability.

Figure 32 shows a comparison between the golden and scalability with high availability topologies.

Note: In a high availability environment the command may be different.

In order to support true high availability, redundancy has to be applied to each of the separate tiers in the enterprise architecture.

This paper introduces a distributed duplex system with high availability in real-time applications.

Limited scalability is a common problem for traditional high availability systems.

The service stores all messages on multiple servers to provide high availability and fault tolerance.

Expert level knowledge in below technologies: J2EE, Database and cluster, Scalability, High availability, and Load balancer.

Various high-availability solutions can be applied.

That article will take you through the reasons for high availability and discuss your options.

Generate various quality and process performance reports. High availability and mobility will be asked.

For more information about high availability configurations for Exchange 2007, see High Availability Deployments.

A high availability solution guarantees that a system will automatically recover in the event of a software or hardware failure.

This provides many benefits where high volume is anticipated and high availability is a requirement.

Determining switch pairing is extremely important for high availability.

The options leveraged include clusters configured for high availability.

More information about high availability and security issues is available in the resources section.

In addition, high-availability may be an option for each customer at the infrastructure layer.

Let's begin with a quick introduction to high availability (HA) and RAID, and then explore the architecture and use of the DRBD.

How should I deploy WebSphere Application Server across these data centers for high availability?

When the high availability management system in WebSphere Application Server gets very busy, a failure to send the session might occur.

You can now remove ER which was temporarily used to facilitate the upgrade of your high availability cluster.

Should you configure a standby system through high-availability disaster recovery?

For more information about load balancing and high availability, see High Availability.

High availability of data and the ability to recover from disaster are key requirements for critical database systems.

High availability of data is vital for on-demand solutions to your business problems.

We recommend transaction logging for high availability and failure recovery.

This may be a desirable option if you have a small database or if high availability is not crucial during the upgrade procedure .

High availability is a system design principle for increased availability.

An apparatus, system, and method are disclosed for autonomously preserving high-availability network boot services.

High availability is fundamental to the architecture and design of data grid technology.

You can do large scale and high availability, but it will cost you a ton of money.

The enterprise needs to have high availability.

Practice showed that the expert system has advantages of easy use and high availability.

If your business is looking for a high availability solution, PowerHA SystemMirror for i is a great choice to make.

Hot standby can be used to achieve a high availability solution.

And that innovation allows us to have high availability at low cost.

This helps understand the implementation of high availability better.

For high availability issue troubleshooting, these tools are helpful.

If you are using the DB2 High Availability (HA) feature, refer to the shutdown and startup procedures for your environment.

This has many convenient properties for running high availability servers.

Multiple SDS servers access a single shared disk for high availability and query workload distribution.

By using the HTTP server instead of the Virtual Hosts, the benefit of high availability and load balancing can be realized.

The system takes care of load balancing and high-availability for all application instances.

High availability through redundancy.

High availability through clustering.

High-Availability Data Replication or HDR is the oldest replication technology in IDS.

Any performance overhead of the high availability environment is therefore moved to the DS8000.

Defining the server groups ensures that high availability is maintained.

This mode enhances performance at the expense of high availability .

In addition to scalability, the deployment of applications to a Network Deployment cluster can also provide high availability.

Instead of focusing on all three, Amazon chose to focus on high availability and scalability and to provide eventual consistency.

The shared resources guarantee high availability among peers.

High availability is best seen as a series of challenges, and the solution outlined here describes the first step.

Many of our PowerHA customers also use Advanced Copy Services to customize and automate their high availability environment.

You must evaluate the impact of setting high availability goals on messaging administrators, business users, and customers.

This synchronization of cluster components is key to Domino's high availability.

Note that the icb-tivamha and icb-nfs-ha virtual images exist only in case dual-node high availability is exploited.

Consider how you will monitor and maintain your failover cluster to achieve your high availability goals.

It is designed for high availability to allow for business continuity in the event of planned and unplanned outages.

This article focuses on the high availability aspects of the POC and will not cover the replication part.

As for icb-nfs, even if not exploiting dual-node high availability, all services are managed by TSA.

This strategy works along with file system sharing strategy to design for high availability.

Each cluster has the same services deployed across all nodes for high availability and scalability.

Significant built in support for our new high availability option is provided.

This setup is similar to setting up high availability for scheduling machines.

HSR(High- availability Seamless Ring) is stipulated in IEC62439-3 standard for the communication network of digital substation.

Typically, you would use this scenario for small to medium applications that require high availability.

It also uses multinode clustering, and automated host patching provides high availability.

Because now the question is framed properly, which is for disaster recovery, not high availability.

This article focuses on one of those features: upgrading a high availability cluster while it is online.

For high availability purposes, the latter is recommended.

This provides high availability services in both products.

Typically, the NFA is used for high availability.

High availability can be achieved with DB2 UDB with excellent results.

When you license DB2 Express-C FTL in a high-availability environment, you don't follow the rules outlined in this section.

This pattern is a preferred approach if high availability of data is required.

It's simply designed to more easily construct and manage clusters for scale-out and high-availability applications.

Network redundancy and high availability is provided at each layer.

One of the key aspects of zipSeries software is high availability under high demand.

Only DDL copymode is supported for high availability disaster recovery (HADR) databases.

ZNYX Networks is the leading global provider of high availability embedded Ethernet solutions for CarrierClasstm systems.

You can also create the report server database on a failover cluster to support high availability requirements.

High Availability is a key component of business resiliency.

Managing a multi-image cloud topology of Cognos based on such criteria as performance, scalability, and high availability.

You can use the control in custom applications that run in any high availability deployment model.

High availability manager service.

You use MSCS clustering for high availability, not for load balancing.

Provides general planning guidelines for how to structure your partitions and configure for high availability.

This promises to simplify high-availability application management with PowerHA SystemMirror.

The DB2 DBA exam focuses more on utilities, high availability, and performance monitoring.

In addition to this, the DB2 installation program can automatically configure this high availability cluster.

High availability is maintained by having a peer-master LDAP server.

How do routing protocols fit into this high-availability drive?

Meanwhile, the nonfunctional requirement aspects are also discussed such as efficient resource management, high availability, extensibility.

Even if you are not exploiting dual-node high availability, all services are managed by TSA.

At last, we give an evaluation of cluster high availability system.

You can set up High-Availability Data Replication using standard ON-Bar or ontape commands for external backup and restore.

In Exchange 2007, there are multiple solutions that can be used to provide high availability for each server role.

Now it's time to test the high availability of the composite application.

For example, a DB2 HADR (High Availability Disaster Recovery) cluster can be set up in the cloud.

Efficient use of resource, high performance, and high availability are assured.

It supports live migration of virtual machines from system to system in real time and high availability features.

In the middle of the process, it is important to ensure high availability and performance of the event delivery.

In summary, the benefits of Amazon's S3 are simple: low cost, high availability, and security.

At the same time, disk array ensures the high availability of sharing data in the system.

In modern J2EE architectures, the main focus is on scalability and high availability.

The clusters cover the need to implement high availability with the highest possible availability time.

In addition to sample and documentation improvements, suppport for WSDL endpoints and high availability features has been extended.

This is a powerful mechanism for providing high availability and increased reliability.

How important is high availability?

Synthesize the consideration, putting forward the high availability cluster system scheme, which is based on network storage system.

First, it utilizes the high availability infrastructure introduced in Network Deployment V6. 0.

You also gain low latency and high availability.

This section shows you how to test the high availability of the deployment manager.

Used by memory to memory replication, stateful session EJBs, dynacache, and the high availability manager.

This section shows you how to create a test client so that you can see how IBM solidDB High Availability affects applications.

And, as discussed, fault tolerance and high availability go hand in hand.

This section shows how to test the high availability of the scheduling daemon.

This is why high availability is so important for all businesses, large and small.

This system has been configured as a High Availability Slave system and it is therefore not possible to change any settings on this system.

The need to maintain high availability of data, 24x7, is crucial for today's global businesses.

As downtime approaches 0, high availability approaches 100%.