clustering

What's different when implementing Flex authentication/authorization in a clustered environment?

Are there any differences implementing Flex application security in a clustered Java environment (such as Oracle Application Server/OC4J or a JBoss cluster) vs a single application server environment? (And/or does it depend on the specific environment software?) What considerations are there in a situation where you need to authenticate...

In Weblogic (10), how do I access the node name from Java?

I would like to set up some per-node configuration in a weblogic cluster and need to access the node name from Java. ...

Data Mining-SCAD1/SCAD2-Subspace Clustering

Hi everyone, I am looking for SCAD (Simultaneous clustering and attribute discrimination) subspace clustering algorithm. If anyone has implemented it, please let me know where I can find/download this algorithm. Thank you. ...

storage for uploaded images on a web farm

I work on mvc.net application. Client is going to move production on a cluster environment. The problem is I store images in the local file system. Images can be dynamically uploaded by users through web site interface. How can I change the application in order to keep the images in working state? The possible solution is the using of s...

how to test web farm through software

Is there are any soft which allow simulate web farm. (something like virtual machine with multiple IIS). I'm going to test the my app on cluster and try to find the way which easier then creation of multiple virtual machines. Thanks ...

Single Sign-on across Tomcat servers without clustering

We have several Tomcat servers serving content for a single domain (via an Apache httpd front end.) We do this to balance memory usage on one of our servlets. That is, each server provides the same web application, but for a different data set. We'd like to implement single sign-on on our website. In other words, we have httpd config...

Enabling gzip compression for JBoss cluster with mod_jk load balancer

We have a JBoss configured in cluster with Apache HTTP+mod_jk as a load balancer. Do we need to configure anything on Apache side in addition to configuring compression in JBoss configuration for connector? ...

Hadoop and MS SQL Server Best Practices

Hi, I've been following Hadoop for a while, it seems like a great technology. The Map/Reduce, Clustering it's just good stuff. But I haven't found any article regarding the use of Hadoop with SQL Server. Let's say I have a huge claims table (600 million rows) and I want to take advantage of Hadoop. I was thinking but correct me if I'm ...

MSMQ messages bound for clustered MSMQ instance get stuck in outgoing queues

We have clustered MSMQ for a set of NServiceBus services, and everything runs great until it doesn't. Outgoing queues on one server start filling up, and pretty soon the whole system is hung. More details: We have a clustered MSMQ between servers N1 and N2. Other clustered resources are only services that operate directly on the clus...

How does weblogic clustering work?

I'm new to weblogic. I've read http://download.oracle.com/docs/cd/E11035_01/wls100/cluster/overview.html and searched this topic on the internet but still had a hard time understanding some of weblogic's clustering concepts. Can anybody confirm/correct my understandings below? a cluster contains one or more logical servers which can ...

Can i install a new instance on one node of a sql server cluster?

Hi, I have a SQL Server clustering test environment. One domain controller, two nodes. Can I install other instance on the two node beside the clustered instance? Thanks. ...

Clustering problem

Hi all I've been tasked to find N clusters containing the most points for a certain data set given that the clusters are bounded by a certain size. Currently, I am attempting to do this by plugging in my data into a kd-tree, iterating over the data and finding its nearest neighbor, and then merging the points if the cluster they make do...

steps for document or word clustering using java

hi friends, Will anybody tell me the steps to perform document or word clustering from this information. I finished the coding for tf-idf and from tat i dont know how to perform clustering. What is the next step to identify the clustering. Please suggest the method for both doc and word clustering. Thanks in advance. ...

Cluster Performance

Cluster Performance I have a client who has 2-web server which are clustered. Two questions... What data makes up the statistics or information you would use to be able to monitor performance or load? Once you have this data identified, how do you know it is time to add a third server? ...

On which hardware NLBs can I set a limit for calls per second for a specified port?

I don't know much about hardware NLBs, but I need this function to limit the load, which comes inside the cluster, and cut the requests that are over the limit. Is it a regular feature for such devices? ...

Open Source Database cluster on Windows Server 2003

Hello, We're looking for an Open Source Database application to run in a cluster environment under Windows Server 2003 across 6-8 cluster nodes. We're primarily looking for High Availability and Load Balancing. Can you provide us with the options available? We've been looking at the SAP MAXDB and Postgres but they're both limited by 1 a...

Grouping similar news contents together like in GOOGLE NEWS

Dear deveopers, Let me narrate the issue i am facing Currently. I am unable to manage the RSS feeds easily due to an overwhelming number of new stories / similar news contents posted in various news sites. For subjects such as world news and business news, many of the stories are redundant, adding a burden to readers to sort out whic...

Synchronize services in a Cluster environment

Hi, I have a service running in a clustered environment. This service talks to the database and performs some CRUD operations. At anytime only one of the services should perform CRUD operations. How can I achieve this in a clustered environment? (or how do I synchronize the service across the instances) PS - Record locking on the datab...

ASP.NET: Clustered environment communication Problem

Hi all, I'm pretty noob with ASP.NET programming and i'm a bit confused on a problem that i'm facing right now. We, as devs in my company, live in a clustered environment like the one shown in figure Nothing really special. You see, IIS Websites are duplicated on evry FrontEnd Servers. Business logic resides on BackEnds that are sit...

Clustered Web Services

Is possible to do a clustered web service (with JAX-WS), that each node receives automatically the resources? May be with EJBs? If possible, how to do it? Thanks ...