Imagine you have many clustered servers, across many hosts, in a heterogeneous network environment, such that the connections between servers may have wildly varying latencies and bandwidth. You want to build a map of the connections between servers my transferring data between them. Of course, this map may become stale over time as th...
I have two clusters of data each cluster has x,y (coordinates) and a value to know it's type(1 class1,2 class 2).I have plotted these data but i would like to split these classes with boundary(visually). what is the function to do such thing. i tried contour but it did not help! ...
I am having trouble with a QT clustering implementation that I want to implement in Perl. The line beginning with "identify set", the third from the end, is the part I can't figure out. The full paper is available here. ...
I want to develop clustering and load balancing by using j2EE,I want to use two Tomcats in back-end,If any request arrives to my application it should send request to the tomcats based on the load factor.I want to add fail over and session replication to my application. Please suggest.. The API for load balncing and clustering that i h...
Hello, buddies! I'm currently studying WebLogic's integration capabilities, to develop a system that ensures high performance, availability and scalability; fail-over and crash recovery and 24/7 availability on a WebLogic integration scenario. I've been exploring some concepts and evaluating potential solutions to the problem I want to...
Suppose I created a JMS Topic (PropertiesTopic) with one subscriber (PropertiesSubscriber). PropertiesSubscriber is running in a load balanced application server cluster as shown in the picture below. When a message is delivered to PropertiesTopic, do all the instances of PropertiesSubscriber running on different app servers get tha...
I have the following values for example: 0 0 0 1 3 2 These values refers to cluster Ids, where the member of the cluster is the index of the vector. Hence we want to get this sort of output: Cluster 0 -> 0,1,2 Cluster 1 -> 3 Cluster 2 -> 5 Cluster 3 -> 4 I tried the following construct but it doesn't seem to work: What's the way t...
Lets say you're starting a new web project that required the website to run on and MVC framework on Mono. A couple major requirements are that it has to scale easy, be stable and work with multiple servers that may or may not be in the same place or even on the same local network. The first thing I thought of was a sort of cluster commu...
Python seems to have many different packages available to assist one in parallel processing on an SMP based system or across a cluster. I'm interested in building a client server system in which a server maintains a queue of jobs and clients (local or remote) connect and run jobs until the queue is empty. Of the packages listed above, ...
After performing a cluster analysis to my dataset (a dataframe named data.matrix), I added a new column, named cluster, at the end (col 27) containing the cluster name that each instance belongs to. What I want now, is a representative instance from each cluster. I tried to find the instance having the smallest euclidean distance from t...
Hi all, I've got a classification system, which I will unfortunately need to be vague about for work reasons. Say we have 5 features to consider, it is basically a set of rules: A B C D E Result 1 2 b 5 3 X 1 2 c 5 4 X 1 2 e 5 2 X We take a subject and get its values for A-E, then try matching the rules in sequenc...
just a wild idea. wonder is it possible to compile maven build on amazon clustering machines to speed up build processes? any reference or guide on this? reference ...
Hello, guys! I'm currently developing a project supported on a WebLogic clustered environment. I've successfully set up the cluster, but now I want a load-balancing solution (currently, only for testing purposes, I'm using WebLogic's HttpClusterServlet with round-robin load-balancing). Is there any documentation that gives a clear compa...
I have an active/passive W2K8 (64) cluster pair, running SQL05 Standard. Shared storage is on a HP EVA SAN (FC). I recently expanded the filesystem on the active node for a database, adding a drive designation. The shared storage drives are designated as F:, I:, J:, L: and X:, with SQL filesystems on the first 4 and X: used for a back...
Hi All, Thanks for reading my question. I am looking for a light weight clustering library in java. I don't need 100s of clustering algo in that library just 5 to 7 algo would be fine for me. I am sure, you are going to ask. What kind of algo. do you need and for what purpose :). So here is the answer. I just need to do classification o...
Hi: Thanks for the answers, I have not used StackOverflow before so I was suprised by the number of answers and the speed of them - its fantastic. I have not been through the answers properly yet, but thought I should add some information to the problem specification. See the image below. I can't post an image in this because i don't ...
Hello, guys! I'm currently developing a system to ensure high performance, availability and scalability; fail-over and crash recovery on a WebLogic integration scenario. Does anybody know if it is possible to customize WebLogic's native heartbeat messages, to add some additional information such as current CPU usage and/or network load...
I'm trying to use the gsh command on ubuntu to do some embarrassingly parallel stuff. I've made an /etc/ghosts file containing all the IP addresses for the hosts, and each host has an account that I created just for "cluster" purposes. However, when I try a command such as, $ gsh -l cluster ok 'echo $host' I get in return two errors...
We have a large cluster of tomcat servers and I'm trying to find an efficient way to share a count among all of them. This count is the number of "widgets" purchased and needs to be checked for every page view. Any server can complete a sale and increment that count, at which point the new value should be made available to all the clus...
Hi I am considering to develop an web application with Spring and OSGi. It seems like they fit together nicely. What are the options for clustering and loadbalancing such an app and what are the pros and cons of each? Thanks ...