We currently have a failover sql cluster with two nodes. For a new large project which we have determined to be business critical, our development team is requesting a new 2 node failover sql cluster. Our server department has responded saying that they do not want to implement a cluster for us, and instead employee multiple virtual ...
Every cluster of computers I've encountered suffers from the same problem: its software is outdated. Naturally, one has the ability as a user to install everything from source in the home directory. I was wondering if there are any tools that would allow one to install and update software within home directory the same way package manage...
When clustering instances of Coldfusion, how do the event gateways respond? Do the requests also get distributed among the clutster? Or is it per instance? Thanks, Faisal Abid ...
Hello, I'm writing an multi-threaded app which will live on two active-active load balanced servers and access a clustered database on another server. Obviously I don't want multiple threads writing to the same records at the same time and SQL provides locking to ensure this doesn't happen. What are the advantages and disadvantages of u...
Hi there, We have a cluster of 4 web servers which contain a few domains, one of which contains quite a lot of videos. We also have a 'staging' server which we usually sync/upload files to and then from there rsync them all out via a bash script to the other web servers. The problem we have is that quite a bit of this is manual. If in ...
We have a Rails app that instantiates a SWF object 16 times (it has to do this, it's just the nature of the application). Instead of being downloaded once, it is being downloaded 16 times. How can we ensure this SWF is cached by the browser the first time it is downloaded? It's being served directly from Apache - can we modify the HTTP...
Hi I have cretaed an application via COM interoperability(using SMO and created a dll consume it in c++) which retrieves the local instances of sqlserver(basically try for network instances and from that trace out for local to make it as work for remote discovery of sqlinstances). it is worked in all cases except win2k8sql2k8 cluster i...
Hi All, I have configred mysql cluster management node and data nodes and mysqld on two server's. Everything is working fine but when i shutdown my first management server then all the nodes get disconnected. Here's the Cofig.ini [NDBD DEFAULT] NoOfReplicas=2 # Number of replicas DataMemory=3500M # How much memory to allocate f...
I am creating a grid application which requires me to send software packets that wrap a class out to participating nodes within my grid. The first idea that I came up with was to have the master nodes contact each node (running a Windows service) and send an assembly containing a class which adheres to a common interface along with a ....
How often do you solve your problems by restarting a computer, router, program, browser? Or even by reinstalling the operating system or software component? This seems to be a common pattern when there is a suspect that software component does not keep its state in the right way, then you just get the initial state by restarting the com...
Is there a way of determining which clusters on an NTFS disk are allocated? I'm thinking along the lines of the display you see on a defrag program before you kick off the defrag itself. I guess you could parse the MFT but it strikes me that this could take a long time on a system with potentially hundreds of thousands of files. Thanks...
Do you need to set up a Linux cluster first in order to setup a Hadoop cluster ? ...
Hi, I'm trying to use a cluster for the first time so it's maybe a stupid question... I would like to run the same program with various parameters in an independant way on multiple nodes. Basically, I would like to compile and process various versions of the linux kernel (one node/one version and the version number is the parameter t...
When starting the PGCluster replication server I get the follwing problem: postgres@mybox:/usr/local/pgsql/bin$ ./pgreplicate -D ../etc -l -n -v *** buffer overflow detected ***: ./pgreplicate terminated ======= Backtrace: ========= /lib/tls/i686/cmov/libc.so.6(__fortify_fail+0x48)[0xb7e69da8] /lib/tls/i686/cmov/libc.so.6[0xb7e67eb0] ./...
I have to demonstrate the power of a cluster, i.e its advantage over a normal machine. Is there any way I can show,to the layman that "If this had been done on a normal workstation, it would have taken X hours and with this cluster its the nth fraction of the x hrs taken"? Please suggest some simulations/renders/computational tests tha...
Hi All, I have two mysql cluster data nodes as Master and slave. But after certain number of rows there is difference between two auto_increment values from one node to another. The difference is of Node 2 is ahead than node 1 by 11. can anyone suggest any fix on this? how to resolve this. and when such type of situation comes? Than...
In the following scenario: 1 Database 4 Web servers How do the Web servers generate unique ID's for the database so that they are unique? Yes it's possible to use Auto-increment, but this is too easily crawled/guessed/etc. So auto-increment is currently not an option. ...
Hi, I'm using Opencv's K-means implementation to cluster a large set of 8-dimensional vectors. They cluster fine, but I can't find any way to see the prototypes created by the clustering process. Is this even possible? OpenCV only seems to give access to the cluster indexes (or labels). If not I guess it'll be time to make my own imple...
We have an installation program that runs in Perl 32-bit. This program needs to get information on cluster resources, so it runs cluster.exe (using backticks) and parse its output. On Windows Server 2003 this went well, as a 32-bit version of cluster.exe existed under syswow64. However, such a 32-bit version does not exist on Windows Se...
Does anyone know how to programatically detect that a Windows server is part of a cluster? Further, is it possible to detect that the server is the active or passive node? [Edit] And detect it from Win32? A registry setting maybe? Thanks for any insight. Doug ...