A Publish/Subscribe Middleware for Dependable and Real-time Monitoring in the Cloud
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1 A Publish/Subscribe Middleware for Dependable and Real-time Monitoring in the Cloud, Subhav Pradhan, Faruk Caglar, Aniruddha Gokhale {kyoungho.an, subhav.m.pradhan, faruk.caglar, Institute for Software Integrated Systems (ISIS) Department of Electrical Engineering and Computer Science Vanderbilt University December 4,
2 Outline of Presentation Context & Challenges Monitoring Clouds Related Research and Challenges Design of SQRT-C Overview of OMG DDS System Architecture Middleware Communication Auto-scaling Use Case Experimental Results Testbed Environment Average Message Latency Comparison Jitter Comparison Conclusion 2
3 Monitoring Clouds 3
4 Monitoring Clouds Providing scalable and QoS-enabled monitoring of resources in the cloud is essential To support application QoS properties To identify security threats Existing approaches to resource monitoring in the cloud RESTful APIs, SOAP, AMQP, and XML-RPC Cannot provide monitoring information timely and scalably 3
5 Monitoring Clouds Providing scalable and QoS-enabled monitoring of resources in the cloud is essential To support application QoS properties To identify security threats Existing approaches to resource monitoring in the cloud RESTful APIs, SOAP, AMQP, and XML-RPC Cannot provide monitoring information timely and scalably single point of failure! bottleneck! 3
6 Related Research and Challenges 4
7 Related Research and Challenges Related Research Ganglia Nagios Pub/Sub middleware for real-time grid monitoring 4
8 Related Research and Challenges Related Research Ganglia Nagios Pub/Sub middleware for real-time grid monitoring Challenges in Prior Work Not for virtualized resources Lack of scalability and support for QoS (timeliness, availability...) 4
9 Outline of Presentation Context & Challenges Monitoring Clouds Related Research and Challenges Design of SQRT-C Overview of OMG DDS System Architecture Middleware Communication Auto-scaling Use Case Experimental Results Testbed Environment Average Message Latency Comparison Jitter Comparison Conclusion 5
10 Overview of the OMG DDS App App App DLRL classes are only local DLRL DLRL DLRL DCPS Communication Topics - Need to be shared 6
11 Overview of the OMG DDS Object Management Group (OMG) Publish/Subscribe standard that aim to enable scalable and real-time data exchanges between publishers and subscribers App App App DLRL classes are only local DLRL DLRL DLRL DCPS Communication Topics - Need to be shared 6
12 Overview of the OMG DDS Object Management Group (OMG) Publish/Subscribe standard that aim to enable scalable and real-time data exchanges between publishers and subscribers DDS provides policies for specifying many QoS requirements App App App DLRL classes are only local DLRL DLRL DLRL DCPS Communication Topics - Need to be shared 6
13 Overview of the OMG DDS Object Management Group (OMG) Publish/Subscribe standard that aim to enable scalable and real-time data exchanges between publishers and subscribers DDS provides policies for specifying many QoS requirements DDS Architectural Elements Data-Centric Publish-Subscribe (DCPS) Data Local Reconstruction Layer (DLRL) App App App DLRL classes are only local DLRL DLRL DLRL DCPS Communication Topics - Need to be shared 6
14 SQRT-C System Architecture 7
15 SQRT-C Middleware Communication 8
16 Auto-scaling Use Case VM2 60% VM3 80% VM1 20% VM3 50% VM3 25% VM2 20% VM1 15% Publisher Subscriber Auto-Scaling Policy if (VM3 s CPU Utilization > 70%) increase a vcpu Data Writer Data Reader VM1 VM2 VM3 Hypervisor increase a vcpu of VM3 Auto-Scaling Server Client Cluster Node Auto-Scaling Node Topic 9
17 Outline of Presentation Context & Challenges Monitoring Clouds Related Research and Challenges Design of SQRT-C Overview of OMG DDS System Architecture Middleware Communication Auto-scaling Use Case Experimental Results Testbed Environment Average Message Latency Comparison Jitter Comparison Conclusion 10
18 Testbed Environment A cluster of 56 blades Dual 2.8 GHz Xeon CPUs 1GB of RAM 40GB of HDD 7 rack servers 12-core 2.1GHz Opteron CPUs 32GB of RAM 500GB of HDD OpenSUSE 11.4 Linux as operating systems OpenNebula 3.0 for operating a private cloud OpenSplice DDS 5.2 for the middleware implementation web.py and mimerenter for the REST implementation 11
19 Average Message Latency Comparison 12
20 Response time and Jitter Comparison Message Round-trip Time and Jitter of RESTful Service 13
21 Response time and Jitter Comparison Message Latency of Different Reliability QoS 14
22 Outline of Presentation Context & Challenges Monitoring Clouds Related Research and Challenges Design of SQRT-C Overview of OMG DDS System Architecture Middleware Communication Auto-scaling Use Case Experimental Results Testbed Environment Average Message Latency Comparison Jitter Comparison Conclusion 15
23 Conclusion 16
24 SQRT-C that leverages DDS Conclusion Experimental results show that the DDS is more appropriate for real-time cloud monitoring 16
25 Conclusion SQRT-C that leverages DDS Experimental results show that the DDS is more appropriate for real-time cloud monitoring SQRT-C resolves the challenges Virtual resource information provided as a service Proper configurations of DDS 16
26 Conclusion SQRT-C that leverages DDS Experimental results show that the DDS is more appropriate for real-time cloud monitoring SQRT-C resolves the challenges Virtual resource information provided as a service Proper configurations of DDS Future Work Experiment with different QoS settings of DDS Fault-tolerant middleware Fine grained auto-scaling middleware 16
27 Questions? 17
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