distributed

问题 This is a spark streaming program written in scala. It counts the number of words from a socket in every 1 second. The result would be the word count, for example, the word count from time 0 to 1, and the word count then from time 1 to 2. But I wonder if there is some way we could alter this program so that we could get accumulated word count? That is, the word count from time 0 up till now. val sparkConf = new SparkConf().setAppName("NetworkWordCount") val ssc = new StreamingContext

问题 I am looking for a distributed Cache/Session solution, below is what I found. I hope anyone could share information regarding pros and cons of using it: NCache Windows Server AppFabric MemCached as recommended by @TFD I am using ASP.NET 4 and SQL Server 2008. Any idea would be very much appreciated! 回答1: You can also look at Redis (http://redis.io/), which is rumored to play very nicely with .NET applications thanks to an open source client for it written in C#: http://code.google.com/p

问题 I've written an application which as of yet is not open source and I'd like to distribute the executable across various linux distros. What's the best way to do this, I've looked a little bit at .rpm and .deb packaging but I can't find if that can be used for binaries or not. Ideally I'd like something like the PackageMaker on OS X or a regular installer on windows that will have it automatically copy into /usr/bin. Is that what .rpm and .deb packages are for or do I have to bundle a shell

问题 Does anyone know how to implement the Natural-Join operation between two datasets in Hadoop? More specifically, here's what I exactly need to do: I am having two sets of data: point information which is stored as (tile_number, point_id:point_info) , this is a 1:n key-value pairs. This means for every tile_number, there might be several point_id:point_info Line information which is stored as (tile_number, line_id:line_info) , this is again a 1:m key-value pairs and for every tile_number, there

问题 I have a internet application that supports offline mode where users might create data that will be synchronized with the server when the user comes back online. So because of this I'm using UUID's for identity in my database so the disconnected clients can generate new objects without fear of using an ID used by another client, etc. However, while this works great for objects that are owned by this user there are objects that are shared by multiple users. For example, tags used by a user

问题 My current development project has two aspects to it. First, there is a public website where external users can submit and update information for various purposes. This information is then saved to a local SQL Server at the colo facility. The second aspect is an internal application which employees use to manage those same records (conceptually) and provide status updates, approvals, etc. This application is hosted within the corporate firewall with its own local SQL Server database. The two

问题 I've been browsing the net trying to find a solution that will allow us to generate unique IDs in a regionally distributed environment. I looked at the following options (among others): SNOWFLAKE (by Twitter) It seems like a great solutions, but I just don't like the added complexity of having to manage another software just to create IDs; It lacks documentation at this stage, so I don't think it will be a good investment; The nodes need to be able to communicate to one another using

问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 9 days ago . I am reading NCCL code on Nvidia Github, it is to hard to understand how topology is build. Is there any material or paper can explain this process. I think maybe Nvidia has released some paper before is also helpful for me. Is there any reference paper can explain function ncclTopoCompute(). Thanks

问题 (nodeA@foo.hyd.com)8> spawn(nodeA@bar.del.com, tut, test, [hello, 5]). I want to spawn a process on bar.del.com which has no file system access to foo.hyd.com (from where I am spawning the process), running subroutine "test" of module "tut". Is there a way to do so, w/o providing the nodeA@bar.del.com with the compiled "tut" module file? 回答1: You can use the following function to load a module at remote node without providing the file itself: load_module(Node, Module) -> {_Module, Bin,

问题 i am using solr 1.4.1 for building a distributed search engine, but i dont want to use only one index file - i want to create new core "index"-directories on the fly in my java code. i found following rest api to create new cores using an EXISTING core directory (http://wiki.apache.org/solr/CoreAdmin). http://localhost:8983/solr/admin/cores?action=CREATE&name=coreX&instanceDir=path_to_instance_directory&config=config_file_name.xml&schema=schem_file_name.xml&dataDir=data is there a way to