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| <div class="innerhero__main"> |
| <div class="innerhero__pre pb-5">Apache Ignite</div> |
| <h1 class="h1 innerhero__h1">Distributed <br />Key-Value APIs</h1> |
| <div class="innerhero__descr pt-2 h5">Query your distributed data in the fastest way possible <br />with key-value APIs</div> |
| <div class="innerhero__action"><a class="button innerhero__button" href="https://ignite.apache.org/docs/latest/index">Start Coding</a></div> |
| </div> |
| <img class="innerhero__pic innerhero__pic--keyvalue" src="/img/features/key-value/hero.svg" alt="Distributed Key-Value APIs" /> |
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| <!-- /.innerhero--> |
| <section class="keyvalue1 container flexi"> |
| <div class="keyvalue1__left"> |
| <h2 class="capstext">Key-Value APIs Overview</h2> |
| <div class="keyvaluetext pt-5"> |
| <p> |
| Every record in Ignite is stored as a key-value pair. All the records are distributed evenly across the cluster nodes. Your key-value queries are directed automatically to the nodes that store requested data. This is how Ignite |
| utilizes all the given memory, disk, and CPU resources. |
| </p> |
| <p>Key-value APIs are supported by all existing Ignite client libraries:</p> |
| </div> |
| <div class="keyvalue1__libs pt-5"> |
| <p class="h5 leyvalue__lang">Java <small>(implements JSR-107 specification known as JCache)</small></p> |
| <p class="h5 leyvalue__lang">.NET</p> |
| <p class="h5 leyvalue__lang">Python</p> |
| <p class="h5 leyvalue__lang">Node.JS</p> |
| <p class="h5 leyvalue__lang">Your language</p> |
| </div> |
| </div> |
| <div class="keyvalue1__right"> |
| <div class="keyvalue1__picwrap picwrap"><img class="keyvalue1__pic" src="/img/features/key-value/key-value-api-pic.svg" alt="" /></div> |
| </div> |
| </section> |
| <!-- /.keyvalue1--> |
| <section class="keyvalueplank container"> |
| <div class="keyvalueplank__inner"> |
| Apache Ignite key-value APIs provide additional capabilities such as <strong>automatic synchronization</strong> with external databases, <strong>near caching</strong> and <strong>ACID transactions.</strong> |
| </div> |
| </section> |
| <section class="keyvalue2 container flexi"> |
| <div class="keyvalue2__left"> |
| <h3 class="keyvalue__title">Automatic Synchronization With External <br />Databases To Keep A Consistent Copy Of Data</h3> |
| <div class="keyvaluetext pt-2 pb-5"> |
| <p>Two synchronization strategies are available in Apache Ignite: <br />write-through/behind and read-through.</p> |
| </div> |
| <dl class="keyvalue2__box pb-2"> |
| <dt>Write-through and write-behind capabilities</dt> |
| <dd class="pt-2">Ignite can automatically write-through or write-behind all the changes to an external database for every key-value request issued by your applications.</dd> |
| </dl> |
| <dl class="keyvalue2__box"> |
| <dt>Read-through capabilities</dt> |
| <dd>Read-through means that Ignite can automatically load data from an external database if a record is missing in memory.</dd> |
| </dl> |
| </div> |
| <div class="keyvalue2__right"> |
| <div class="keyvalue2__picwrap picwrap"><img class="keyvalue2__pic" src="/img/features/key-value/key-value-api-2.svg" alt="" /></div> |
| </div> |
| </section> |
| <!-- /.keyvalue2--> |
| <section class="keyvalue3 container flexi"> |
| <div class="keyvalue3__right"> |
| <h3 class="keyvalue__title">Near Cache To Process Your Requests In Microseconds</h3> |
| <div class="keyvaluetext pt-2 pb-5"> |
| <p>A near cache is a local client-side cache that stores the most frequently <br />used data on the application end.</p> |
| </div> |
| <div class="keyvalue__title">How it works</div> |
| <div class="keyvaluetext pt-2 pb-5"> |
| <p>It is applied to applications that require a consistent response time of a few <strong>microseconds.</strong> Ignite automatically invalidates and updates the near cache.</p> |
| <p> |
| Whenever the primary copy of a record gets updated on a server node, Ignite propagates the change to all the nodes that store the record’s backup copy, as well as to the applications |
| that keep the record’s copy in their near caches. |
| </p> |
| </div> |
| </div> |
| <div class="keyvalue3__left"> |
| <div class="keyvalue3__picwrap picwrap"> |
| <img class="keyvalue3__pic" src="/img/features/key-value/key-value-api-3.svg" alt="" /> |
| <div class="keyvalue3__picdescr"> |
| <p>1. Call to the near cache</p> |
| <p>2. Call to the Ignite cluster <span>(if a record is not found in the near cache)</span></p> |
| <p>3. Read-through from the external database<span>(if the record is not in the Ignite cluster yet)</span></p> |
| </div> |
| </div> |
| </div> |
| </section> |
| <!-- /.keyvalue3--> |
| <section class="keyvalue4 container flexi pb-1"> |
| <div class="keyvalue4__left"> |
| <h3 class="keyvalue__title">ACID Transactions To Update Your Distributed Records Consistently</h3> |
| <div class="keyvaluetext pt-2 pb-5"><p>Apache Ignite key-value APIs are fully transactional, which means that data can be updated consistently and reliably.</p></div> |
| <div class="keyvalue__title">How it works</div> |
| <div class="keyvaluetext pt-2 pb-5"> |
| <p> |
| An Ignite transaction can update multiple records from different tables stored on different cluster nodes. Ignite can even span a transaction to an underlying relational database. Ignite implements |
| <a href="/features/acid-transactions.html">two-phase-commit protocol to ensure data consistency at scale.</a> |
| </p> |
| </div> |
| </div> |
| <div class="keyvalue4__right"> |
| <div class="keyvalue4__picwrap picwrap"><img class="keyvalue4__pic" src="/img/features/key-value/key-value-api-4.svg" alt="" /></div> |
| </div> |
| </section> |
| <!-- /.keyvalue3--> |
| <section class="native-bottom container"> |
| <div class="native-bottom__grid"> |
| <article class="nativebotblock"> |
| <div class="h4 nativebotblock__title"><img class="nativebotblock__icon" src="/img/features/native-rocket.svg" alt="" /><span>Ready to Start?</span></div> |
| <p class="nativebotblock__text">Create your first application using <br />Ignite key-value APIs</p> |
| <a class="nativebotblock__link arrowlink" href="https://ignite.apache.org/docs/latest/key-value-api/basic-cache-operations" target="_blank">Using Key-Value APIs</a> |
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