Product Questions

 Technical Questions

Business Questions

For Open Source Developers

Product Questions

  • What is Zing®?
  • Zing is a JVM that is compatible and compliant with the Java SE specification. Zing is optimized for Linux and x86. Designed for enterprise applications and workloads that require large memory, high transaction rates, consistent response times and high sustained throughput, Zing is the only JVM that delivers response times independent of heap size.
  • How is Zing different from traditional JVMs for deploying Java applications?
    Zing is a highly optimized JVM and elastic runtime that breaks traditional Java scale barriers and provides applications with orders of magnitude improvement in Java responsiveness, scale and throughput. The Zing distribution includes a non-intrusive, production-time application visibility tool, called Zing Vision (ZVision). With ZVision IT organizations have for the first time a zero-overhead, fine-grained visibility tool that can help find problems and accelerate resolution of elusive production issues.
  • Why is Zing important to Java developers, architects and application owners?
    With Zing, Azul has created the most scalable Java Virtual Machine (JVM) for enterprise workloads and made it available on cost-efficient commodity hardware. With Zing, enterprises can now dramatically simplify Java deployments by using fewer instances while achieving greater response time consistency under load and dramatically lowering operating costs.
  • Isn't Zing just another JVM?
    No. At its core, Zing uses the Azul C4 (Continuously Concurrent Compacting Collector) which eliminates "stop-the-world" pauses that limit the scalability of all traditional JVMs. Because a single instance can scale beyond a few Gigabytes to 330 GB of memory, Zing can dramatically reduce the total number of instances needed to support enterprise applications or multi-tenancy SaaS/PaaS solutions, simplifying deployments, dramatically improving response time consistency and lowering operational costs.
  • How does Zing deliver better performance than other JVMs?
    Zing eliminates "stop-the-world" garbage collection pauses that limit the scalability of other JVMs so that each Zing instance can scale to over 300 GB of heap memory. In addition, Zing utilizes highly optimized client and server compilers and uses tiered compilation by default.
  • Will Zing work on my desktop machine/mobile device?
    Zing is designed for use on servers only.
  • How can I try Zing?
    Through the free Zing trial program. You can see if your environment is supported by checking our specifications page.
  • How can I buy Zing?
    Contact us via email, phone (+1 650.230.6500), or web form.
  • What is Zing Vision?
    Zing Vision is a zero overhead, always-on production time monitoring, diagnostic and tuning tool instrumented into Zing.  Zing is always collecting data as a side-effect of work it has to do anyway, which allows systems administrators to utilize this information through Zing Vision without fear of impacting running applications.

Technical Questions

  • Do I need to port my application to Zing?
    No. Deploying Zing requires no changes to existing applications. You merely point the application's JAVA_HOME environmental variable to Zing and you are running on the most scalable JVM on the market. Zing also requires no changes to other aspects of your infrastructure – security, other applications, monitoring tools, etc.
  • How does Zing support large heap sizes and how is it elastic?
    Zing allows Java applications to utilize any amount of memory they need to execute, limited only by the physical memory in a system or the amount recognizable by the hypervisor. Because of Zing's unique garbage collector, based on Azul's groundbreaking C4 (Continuously Concurrent Compacting Collector) technology, GC pauses are independent of size of the JVM heap and do not limit application scalability. In addition, Zing includes a patented innovation of "memory pools" (i.e. memory reserves) that allows JVMs to dynamically grow its memory footprint based on real-time demand; when demand lessens, Zing gives this memory back to the system. This memory reserve not only ensure consistent performance under heavy load, but it can act as emergency memory for JVMs that encounter "memory leaks" due to bugs or coding errors.
  • What versions of the JDK does Zing support?
    Zing supports Java SE/EE 6 and beyond as well as most J2SE 5.0 applications.
  • How is Zing invoked by an application?
    Once Zing is installed on a system, invoking it is done just like any other JVM/JDK (i.e. by simply changing JAVA_HOME to point to the new JDK).
  • Which operating systems and versions are supported?
    x86: Linux (RedHat 5.4 or later, CentOS 5/6, SUSE SLES 11 sp1, sp2 and sp3, Ubuntu 10.04 LTS and 12.04 LTS).
  • How does Zing deliver pauseless operation?
    Zing uses the Azul C4 garbage collector by default. The C4 collector is continuously compacting regardless of heap size and never uses 'stop-the-world' pauses for garbage collection.
  • What is the C4 garbage collector?
    The C4 (Continuously Concurrent Compacting Collector) is an updated generational form of the Azul Pauseless GC Algorithm and is the default collector of Zing.
  • Can Zing help resolve database contention?
    Yes. With fewer application instances, your database may see fewer connections and less contention.
  • Has Zing been tested with a wide variety of Java applications?
    Yes. For each release we test a variety of application stacks (including WebLogic, WebSphere Application Server, JBoss and Tomcat), as well as other open source software and 3rd party apps. Please contact us if you have a question about a particular application.

Business Questions

  • How much does Zing cost?
    Zing is priced on a subscription basis per server. With per-server pricing, you don’t need to worry about core counts, memory size, or number of instances deployed per server. The annualized subscription price for Zing per physical server ranges from $3500 (for several hundred servers) to $7500. Higher volumes and longer subscription terms will reduce the per-server price for Zing. Pricing for virtual servers is also available upon request.
    Your Azul sales representative will provide pricing that matches your specific requirements and help you maximize the value of your Zing investment.
  • Why should business owners care about Zing?
    Java applications are often business-critical and mission-critical. Performance and scalability issues that affect revenue and usage are often NOT due to the application, database or network but are more often related to the choice of JVM. By choosing Zing, you can eliminate unexpectedly long wait times for users and out-of-memory crashes to capture lost revenue and customers and deliver a consistent user experience even under heavy loads.
  • My application has to deliver a strict SLA. How can Zing help?
    Zing eliminates long response time delays, inconsistent response times (aka response time outliers) and system crashes that can cause SLA violations.
  • How can Zing help my Cloud-based or SaaS-based application?
    Because of memory and scalability limitations, conventional JVMs are not a good fit for cloud- and SaaS-based services. Zing is the best JVM for multitenant SaaS and cloud applications. Zing allows more tenants to be run on a single instance, scales elastically as loads increase to prevent one tenant's peak from affecting another tenant's response times, and lets you deploy large customers without worrying about scalability.
  • We're a software company. Why should I encourage my customers to deploy on Zing?
    Your Java-based application will run better - more scalable and with far lower peak latency - on Zing as opposed to any other JVM. Zing also makes deployments simpler, with fewer instances and less tuning; allows your customers more flexibility in deployment type, such as enterprise clouds or virtualized systems; and provides always-on monitoring tools to optimize performance on production (running) systems.
  • How can Zing save me money on database licenses?
    In selected use cases Zing allows you to deploy fewer instances for the same number of users, so you can also have fewer database servers.

For Open Source Developers

  • How is Zing different from traditional JVMs for deploying open source applications?
    Zing is optimized for Linux and x86 hardware favored by users of open source. Zing improves the performance of your open source applications with orders of magnitude improvement in peak Java latency, scale and throughput. The Zing distribution also includes a non-intrusive, production-time application visibility tool called Zing Vision (ZVision). With ZVision you can debug development issues quickly, and your users have for the first time a zero-overhead, fine-grained visibility tool that can help find problems and accelerate resolution of elusive production issues.
  • Why is Zing important to open source developers?
    With Zing open source developers can stop worrying about GC, use whatever memory configuration is ideal for your application, and achieve greater response time consistency under highly variable workloads.
  • How can I use Zing in my open source development project?
    Through our free open source developer access program. Email us at zing_oss@azulsystems.com to request access, which is free (annual free subscriptions can be renewed annually) for Open Source committers. You can see if your preferred Linux distro is supported by checking our specifications page.
  • How can users of my open source project buy Zing?
    Please refer your users to Azul Systems. They can contact us via email, phone (+1 650.230.6500), or web form. Please feel free to post this information on your web site.
  • What license do I need for open source development, qualification and testing?
    You will need the Azul open source development license. When you download Zing, you will accept this license as part of the process.
  • What license will users of my project need for deployment?
    Commercial users of your open source project will need to purchase a production license and maintenance from Azul Systems. Licenses are based on an annual subscription per server. Please direct your users to call us at +1.650.230.6500, email us at info@azulsystems.com or use our web form to request licensing assistance.
  • Is Zing open source?
    Zing is not open source.
  • How can I get support during development?
    Free support is available on the developer forum here. You may also purchase a developer support contract from Azul Systems. Please contact us for more information.
  • Can I embed Zing in my open source project or in software that I sell?
    You may include Zing with your open source project or commercial software.  Your users or buyers will need a production license in order to deploy the software on Zing.

1J2SE 5.0 applications that use functionality not explicitly removed in Java SE 6. For more information, please see our specifications page.