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Posted to commits@stratos.apache.org by bu...@apache.org on 2014/05/20 12:27:14 UTC
svn commit: r909398 - in /websites/staging/stratos/trunk/content: ./
about/why-apache-stratos.html
Author: buildbot
Date: Tue May 20 10:27:13 2014
New Revision: 909398
Log:
Staging update by buildbot for stratos
Modified:
websites/staging/stratos/trunk/content/ (props changed)
websites/staging/stratos/trunk/content/about/why-apache-stratos.html
Propchange: websites/staging/stratos/trunk/content/
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--- cms:source-revision (original)
+++ cms:source-revision Tue May 20 10:27:13 2014
@@ -1 +1 @@
-1596181
+1596183
Modified: websites/staging/stratos/trunk/content/about/why-apache-stratos.html
==============================================================================
--- websites/staging/stratos/trunk/content/about/why-apache-stratos.html (original)
+++ websites/staging/stratos/trunk/content/about/why-apache-stratos.html Tue May 20 10:27:13 2014
@@ -138,16 +138,12 @@
<h2>Open extensible architecture</h2>
+<p><img src="/images/digram1.jpg"/>
<p>Above diagram shows, how Apache Stratos core components (Cloud Controller, CEP, Auto Scaler, Stratos Manager which include Artifact distribution Controller and Rest API) integration with IaaS layer, foundation services and dynamic services that are cartridges.</p>
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<h2>Why is this architecture so important?</h2>
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<p>Cartridge model provide run time extendability to bring any type of cartridges such as language cartridge, framework cartridge, data cartridge ..etc without binding to any specific Operating Systems. This bring polyglot nature for tha PaaS and its is so important, because not to trap with limitation that many PaaS offering has.</p>
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<p>Another key advantage of Apache Stratos cartridge model is that it enables to bring even legacy containers and applications into cloud with ease. So, with Apache Stratos, you can cloud enable both existing IT assets as well as the future IT assets that you plan to use or yet to acquire.</p>
-
<p>Another important architecture design in Apache Stratos is unified communication among all components using message bus and real time event bus. It provide unified interface to integrate with any third party systems or extending to work with existing systems. Also its carefully design to cater heavy traffic via real time event bus (via thrift protocol) and used AMQP for messages which need reliable delivery.</p>
-
<p>Another important extendability of Apache Stratos is that ability to plugin any IaaS due to the use of apache jclouds API. Which give more freedom to choose your own IaaS vendor, and it also enable to extend multiple IaaS integration, which is important in features like cloud bursting etc.
<h2>True flexibility for custom services</h2>
<p>If you look at current PaaS offering, you can't get true flexibility for your own custom service. Many cases, you have to bare with what they are offering and make your solution around it. With the Apache Stratos cartridge model, you can create custom service, without any limited boundaries. Your cartridge can be fully configured (installed all software, configuration ..etc) or zero configured (let cartridge user to install and config what they want) or in-between. This will allow you to customise your PaaS to suite in your current business workflows.</p>
@@ -164,52 +160,29 @@
<li>a = second derivative (eg. second derivative of current load average)</li>
</ul>
<P>Multi factored auto scaler leads to maximize resource utilization while benefiting easy of capacity planning. Also its capable of dynamic resource provisioning across multiple clouds. This give devOps life easy and very accurate capacity planning.</p>
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<h2>Multi-tenancy</h2>
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<p>Multi-tenancy has different levels of isolations. Almost all PaaS vendors only provide container multi-tenancy like virtual machine, LXC or docker etc. But this is not scalable for large deployment scenario which has hundred thousand or million of tenants.</p>
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<p>Apache Stratos has both container and in-container multi-tenancy capability provide Apache Stratos to be in uniqueness in the PaaS space. With the In-container multi-tenancy support user can have high tenance density which optimised resource utilisation by sharing resources such as CPU and memory across the tenants.</p>
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<h2>Scalable dynamic load balancing</h2>
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<p>Load balancers play a major role in scaling application in the cloud. Load balancers distribute incoming traffics into several server nodes, or clusters, or other resources to maximize the throughput, minimise response time and provide mechanism scale application based on the workload.</p>
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<p>Apache Stratos capable of provision scalable load balancers for any IaaS clouds well as integrate any third party load balancers. This gives more flexibility and extendability while providing more efficient load balancing based on deployment environment.</p>
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<h3>Apache Stratos Load Balancing features and benefits</h3>
-
<p>Provisioning - Load balancers can spin up dynamically. Based on load balancer as cartridges, Apache Stratos will spin up defined minimum load balancers when the first application subscription comes. Also capable of defining load balancers to spin up in every cloud, regions enabling effective multi-cloud deployment specially for geo-graphical based application deployments.</p>
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<p>Flexibility - Can defined service level dedicate load balancing. Easy to define service level load balancers via REST API while capable of doing load balancing multiple services in single load balancer.</p>
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<p>Expandability - Capability of integrate any third party load balancers. With the message broker and topology based model, its easy to integrate load balancers like HAProxy, nginx, AWS ELB ..etc. it gives optimize load balancing based on the deployment. (e.g use AWS ELB on EC2 deployment)</p>
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<h2>Capability of controlling IaaS resources</h2>
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<p>Different IaaS vendors provide different resource pooling, like regions, availability zones, hosts, subnets etc. If we could not controlled these resources and utilized in PaaS layer , leads to waist many resources. Also it is very important controlling them to do high available kind of deployments.</p>
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<p>Apache Stratos has carefully designed to address above problem. Apache Stratos has introduced partitions, network partitions to group IaaS resources to deploy cartridges in very controlled manner.</p>
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<h3>Partitions</h3>
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<p>Partitions are logical group, that can defined by devOps based on available IaaS resource pooling like regions, availability zones ..etc. With this definitions, Apache Stratos capable of selecting where to spawn Cartridge instances, selected resource pool which is very useful in deployment like high available or disaster recovery.</p>
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<h3>Network Partitions</h3>
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<p>With this concept, Apache Stratos can logically group one or more partitions that are reside in same network. With this network partition concept, Apache Stratos Auto Scaler can have intelligence of monitor and predict load of particular network bound regions and take necessary auto scaling decisions very easily. This also very unique and important feature Apache Stratos bringing into PaaS world.</p>
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<p>Smart Policies</p>
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<p>With the partitions and Network partitions, devOps can defined smart policies namely auto scaling and deployment policies, which can be used in cartridge subscriptions. Smart policies will provide cloud SLAs which absolutely mandatory when you consider cloud solutions.</p>
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<h2>Logging, metering and monitoring</h2>
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<p>Logging, metering and monitoring are primary but important features you should not neglect. Apache Stratos capable of capturing all health statistics, application logs well as usage and aggregate them into centralized location. it provide devOps life easy otherwise it is impossible task to login and monitor each and every instances in a large scale deployment which has hundreds of instances.</p>
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<h2>Cloud bursting</h2>
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-<p>Cloud bursting is now widely discuss since it reduces TCO (Total Cost of Ownership) while provisioning application into another cloud to handle peak load. Like all other aspect, Apache Stratos cloud bursting also carefully design to work with private, public and hybrid cloud with effective provisioning load balancers per bursting cloud.</p>
+<p>Cloud bursting is now widely discuss since it reduces TCO (Total Cost of Ownership) while provisioning application into another cloud to handle peak load. Like all other aspect, Apache Stratos cloud bursting also carefully design to work with private, public and hybrid cloud with effective provisioning load balancers per bursting cloud.</p></p>
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