Product Overview Questions
For Open Source Developers
- 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 any combination of large memory, high transaction rates, consistent response times or high sustained throughput, Zing is the only JVM that delivers predictable response times independent of heap size.
- What 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 single license annual subscription price (with support) for Zing is $3500 USD per server, with significantly lower prices for higher volumes and longer-term subscriptions. Please contact us to learn about the special pricing available for start-ups and companies with $25 million or less in annual revenue, and for ISVs and manufacturers looking to embed/integrate Zing with their products.
- 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?
Zing is a better JVM that leverages advanced technologies to deliver improved performance for mainstream Java applications. Most of our customers don’t need huge Java heaps or ultra-low latencies — they just want their Java applications to run reliably. Zing delivers these benefits via the Azul C4 (Continuously Concurrent Compacting Collector) which eliminates the “stop-the-world” pauses that limit the scalability of all traditional JVMs. Because a single instance can scale beyond a few Gigabytes to as much as 8 TB 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 opex and capex. Zing also ships with ReadyNow! technology that solves Java warm-up issues, allowing your applications to start fast and stay fast.
- 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 8 TB of heap memory. Zing also utilizes highly optimized just-in-time (JIT) compilers and uses tiered compilation by default. Traditional Java warm-up issues are solved by Zing’s ReadyNow! technology that allows applications to start up fast and stay fast, allowing operations teams to save and reuse accumulated compiler optimizations between runs and avoiding de-optimization stalls that can slow down processing when workloads or conditions change.
- Will Zing work on my desktop machine/mobile device?
While Zing is designed for use on servers, the minimum configuration is a Linux-based x86-64 processor. Zing will run with 1 GB of memory and 2 cores.
- How can I try Zing?
You can download Zing from an Azul repository and try it yourself for up to 30 days through the free Zing trial program. You can see if your environment is supported by checking our specifications page. To request an on-site evaluation and work with an Azul expert, simply contact us.
- How can I buy Zing?
You can order Zing from an Azul representative, reseller partner, or by using a credit card. 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.
- How does Zing solve Java warm up issues?
Zing uses Azul’s innovative ReadyNow!™ technology to solve warm-up issues. Designed for low latency systems, ReadyNow! allows Java applications to achieve optimum performance and consistency at startup and minimizes disruptive de-optimizations that can occur when load conditions change.
- 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 environment 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 the 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 the 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 8, 7 or 6.
- 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?
Zing supports recent x86 versions of Linux distribution families, including Red Hat Enterprise Linux, Ubuntu, SUSE Linux Enterprise Server, Oracle Linux, Debian, and Amazon Linux. Review the Zing system specifications for specific versions. Zing also offers flexible Linux version support through an AutoBuild feature for its memory manager module.
- What is Zing ReadyNow!™?
ReadyNow! is technology built into the Zing runtime that solves Java warm-up problems for good. ReadyNow! has two major features. First, it gives operations teams the ability to save and reuse compiler optimizations across runs. Second, ReadyNow! offers developers robust APIs and compiler directives to pre-compile code that will be commonly used or methods that must be fast even though they are called infrequently.
- 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 Wildfly, Active MQ, Cassandra, WebLogic Server, 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.
- Why should business owners care about Zing?
Zing helps you meet your business objectives without re-engineering your existing systems. You’ll deliver a better customer experience, support more users on your existing infrastructure — and you’ll be able to deploy new features faster than your competition. 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 when demand spikes unexpectedly.
- 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 workloads; and provides always-on monitoring tools to optimize performance on production (running) systems.
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 email@example.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 website.
- What license do I need for open source development, qualification, and testing?
You will need the Azul open source agreement. When you download Zing, you will accept this agreement 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 Zing subscriptions from Azul Systems. Please direct your users to call us at +1.650.230.6500, email us at firstname.lastname@example.org or use our web form to request assistance.
- Is Zing open source?
Zing is not open source.
- How can I get support during development?
Free support is available via the Zing Community Forum. You may also purchase support 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.