I have to look into solutions for providing a MySQL database that can handle data volumes in the terabyte range and be highly available (five nines). Each database row is likely to have a timestamp and up to 30 float values. The expected workload is up to 2500 inserts/sec. Queries a likely to be less frequent but could be large (maybe in...
Hello everyone, I am confused about the connection string format of ADO.Net when connect to a non-default instance of SQL Cluster. I did search but find various samples, could anyone let me know what is the correct format please (if I know the virtual server name and instance name)? I am using trusted connection. thanks in advance, Geo...
I have a Debian cluster with 2 nodes and two quad-core processors each. I use Torque and Maui as scheduler. When I try to run an MPI job with 16 processes, the scheduler is not able to run the job: either it puts it to the queue (although there is not any job runing at that moment) or runs and the resulting output file says that you was ...
I am wondering how to verify that Hibernate's L2 cache performs correctly. I have an application running on a cluster of JBoss 5 instances with JBoss Cache. Load testing would answer the question of performance. But how to make sure that cluster related issues like the cache invalidation between nodes works like it should be? ...
Assume there are several computers, distributed in the same network. I install a program on all of them, and so there is a cluster. and I can log in it, run my application(like web server , db server, and so on). I don't need to configure the IPs, don't need to balance the loading. Is there any software like this now? edit: OK, I want ...
Hi there If you'll be put into the situation to find a client for a big cluster, where did you start your search? I know that research centers can benefit from the big computing power of a cluster, but in those crisis times, a new client is more difficult to find. Can you give me some samples of clients which are buying computing power...
Hi, Basing on your experience with Oracle, what will be the best type and settings for index that you would set on a column of DATE type? I don't necessarily need to go for partitioned index. It is a logging kind of table. You don't really care about unique id as a primary key (in fact date is close enough to be uniques most of the ...
Hi everyone. I am searching for a java framework that would allow me to share a cache between multiple JVMs. What I would need is something like Hazelcast but without the "distributed" part. I want to be able to add an item in the cache and have it automatically synced to the other "group member" cache. If possible, I'd like the cache ...
I'm currently writing java project against mysql in a cluster with ten nodes. The program simply pull some information from the database and do some calculation, then push some data back to the database. However, there are millions of rows in the table. Is there any way to split up the job and utilize the cluster architecture? How to do ...
I would like to know any experience with the Tomcat Session Cluster solution. Is it production level? Does it scale? Can I use it in a server farm? Do you recommend any other solution for a session cluster? (Ex: database, terracota, jgroups, etc.) ...
Hi, I wonder if it is possible to check if a file has already been opened by another node in the same GFS cluster. For example, fuser command runs cluster-wide in TruCluster. Is it possible to query lock managers data via a command or api ? Thanks a lot B. ...
I currently am a student worker at a medium sized university. i work for the college of science (includes math, stat, comp sci, physics, chem, and biology) and as a "technician"; which basically is a catch all for basic trouble shooting and fixing faculty computer, setting up computer labs, writing custom programs, and administrating web...
Hi, I have an application that i have built(on linux, written in c++ compiling with g++), that uses shared libs, it works fine when i run it locally, as the shared libs can be found, however when i run it on a cluster where the libs are only installed on the head nodes, i get the error : ./start: error while loading shared libraries: ...
I need to setup a JDBC connection string to SQL Server. This question is similar to the the C# ADO.Net connection question. This one is specific to JDBC connection strings. The usual format for the JDBC string is "jdbc:sqlserver://{host}:{port}". Now, for a SQL server cluster I have a cluster name vvv\iii ({virtual server}{instance nam...
What is the best strategy to refactor a Singleton object to a cluster environment? We use Singleton to cache some custom information from Database. Its mostly read-only but gets refreshed when some particular event occurs. Now our application needs to be deployed in a Clustered environment. By definition, each JVM will have its own Si...
I have created a console application in C# using .NET 2.0. I have tested the application on the 32 and 64 bit versions of Windows Server 2003 and it is working properly. When I tried to run the application on Windows Server 2008, but it doesn't work. Later, someone told me to turn off UAC (User Access Control and Data Execution Preventio...
Hi All, I have a NDB Cluster set up with two data nodes, i want to add third data node in this, What steps i need to follow. For ex:- I have to install mysql server on that third server and change the config file add the third server ip. Please correct me if i am wrong Thanks in advance ...
I have some code that I want to only allow access to by one thread. I know how to accomplish this using either synchronized blocks or methods, but will this work in a clustered environment? The target environment is WebSphere 6.0, with 2 nodes in the cluster. I have a feeling that synchronized won't work, since each instance of the ap...
Hi All, This is my config.ini file options affecting ndbd processes on all data nodes: [ndbd default] NoOfReplicas=1 # Number of replicas DataMemory=80M # How much memory to allocate for data storage IndexMemory=18M # How much memory to allocate for index storage # For DataMemory and IndexMemory, we have use...
I have a apache httpd which distributes the load between 2 servers (Serv_A and Ser_B). Using sticky session. If the request was sticky with Serv_A and Serv_A goes down. Question is? 1. should the proxy send the request to Serv_B without doing a redirect from the browser? OR 2. it should always redirect from the client browser to Serv_...