Application Availability

Application high-availability requires that business-critical processes continue to run and users continue to experience uninterrupted access in the event of planned and unplanned circumstances. From server load balancing, link load balancing and global server load balancing, to WAN optimization for back-up and recovery, to remote access for business continuity, solutions for application availability play a critical role in guarding profitability and maintaining workforce productivity.

Challenge

  • Ensure an uninterrupted application experience in the event one or more servers become overloaded or unresponsive
  • Maintain 24/7 connectivity between corporate networks and the Internet
  • Route requests to redundant data centers in the event of local disruptions
  • Increase the frequency of backup and replication to better mirror data and enable more seamless failover to redundant data centers
  • Enable remote and mobile access to business applications from anywhere and any device to ensure business continuity in the event workers cannot get to their place of work

Solution

  • Server load balancing with application and server health checks for maintaining session and transaction persistence
  • ISP and link load balancing for redundant connectivity to the Internet
  • Global server load balancing for seamless fail over of application traffic to alternate data centers in the event of geographic disruptions
  • WAN optimization for accelerating data transmission across wide area networks and reducing the time necessary for backup and replication
  • Scalable, secure remote access with burst licensing for cost-effectively supporting spike usage caused by business continuity events

Load Balancing, WAN Optimization and Remote Access for Application High-Availability

Array Application Availability solutions provide load balancing, backup and failover for servers, WAN links and data centers to ensure applications remain up and running in the event of disruptions large or small. To ensure workers can access applications, even if they cannot get to work, Array remote access solutions support connectivity from any device, anywhere and offer flexible licensing options that make preparing for surge usage both affordable and predictable. Business disruptions can take many forms, from equipment failures and network outages, to minor events such as sick days, to major events such as extreme weather and natural disasters. Leveraging Array application high-availability solutions, businesses can ensure that core systems are always up and running and workers always have access to the applications and resources essential to accelerating business.

Load Balancing

Offloading Servers

Array load balancing solutions offload CPU-intensive connection management tasks onto dedicated appliances, allowing servers to spend a greater number of cycles processing client requests. In handling social media, legacy protocols and other chatty applications, connection multiplexing is capable of aggregating millions of client connections into fewer, longer-lived back-end connections that improve server efficiency by 50% or more.

Processing SSL also consumes a massive number of server cycles as a result of intensive bulk encryption and decryption, a burden that will only increase as businesses migrate from 1024-bit SSL to the more secure and computationally intense 2048-bit SSL standard. Offloading SSL from servers to dedicated Array SSL accelerators, businesses can do more with less while maximizing their ability to support secure applications, transactions and Web content.

Application Acceleration

In addition to improving application performance by offloading connection handling and SSL encryption, Array load balancing solutions can apply caching, compression and traffic shaping to further improve application performance. Enabling caching, client requests can be served from memory to achieve faster seek times while simultaneously freeing up cycles on backend servers. Applying compression, data retrieved from servers can be optimized to more efficiently utilize bandwidth; by reducing the amount of data sent over the network, compression allows businesses to do more with less while at the same time improving response times for end users. For businesses that need to ensure mission-critical applications take precedence over non-essential traffic, traffic shaping may be applied to guarantee bandwidth and maintain SLAs.

To help businesses tune applications for maximum performance, Array provides deployment guides and configuration blueprints for individual enterprise applications. Load balancing deployment guides, tested and certified by Microsoft, SAP, eClinicalWorks and others, take the guesswork out of ensuring maximum performance and availability, while WAN optimization blueprints ensure that Office, SharePoint, Outlook, CIFS, MAPI, HTML, IBM, SAP and others common enterprise applications operate as efficiently as possible over wide area networks.

WAN Optimization

WAN optimization reduces responses times for applications accessed over wide area networks by minimizing the traffic that travels between remote offices and data centers, public and private clouds and remote users. By mitigating the effects of limited bandwidth, high latency, packet loss and network congestion on application performance, WAN optimization reduces end-user response times by 95% or more and ensures a LAN-like experience regardless where users access applications and data.

Mobile Acceleration

Because WAN optimization appliances are not cost-effective or practical for remote users, a mobile client is provided to accelerate traffic between individual devices and WAN optimization appliances in the data center or cloud. Installing Array mobile clients, bandwidth consumption is commonly reduced by 60-95% and files download up to 20 times faster to produce a computing experience optimized for higher overall productivity.

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