Large Image in .net
I want to create large image by C#. (i have some photos with large size (4800 * 4800). i want to merge these photos.) I use Bitmap but don't support. (Error : Invalid Parameter) ...
large
How to manipulate *huge* amounts of data
Hi there! I'm having the following problem. I need to store huge amounts of information (~32 GB) and be able to manipulate it as fast as possible. I'm wondering what's the best way to do it (combinations of programming language + OS + whatever you think its important). The structure of the information I'm using is a 4D array (NxNxNxN) ...
What method should be used for searching this mysql dataset?
I've got a mysql dataset that contains 86 million rows. I need to have a relatively fast search through this data. The data I'll be searching through is all strings. I also need to do partial matches. Now, if I have 'foobar' and search for '%oob%' I know it'll be really slow - it has to look at every row to see if there is a match. ...
view Large PDF file in iPhone SDK
I have followed some tutorial that teach me how to view PDF file in UIWebView, however I found that if the file size is large, it will be lag when I zoom the PDF, but it doesn't occur in Mobile Safari. So anyone know how to solve it? ...
creating large database 10gb for informix
creating large database 10gb for informix ...
Reverse massive text file in Java
What would be the best approach to reverse a large text file that is uploaded asynchronously to a servlet that reverses this file in a scalable and efficient way? text file can be massive (gigabytes long) can assume mulitple server/clustered environment to do this in a distributed manner. open source libraries are encouraged to conside...
Client-side caching/paging of *Large Hierarchical Data* (Large Tree Data)
Background: I am developing a client-server based WPF application which displays large result sets (millions of rows) from related ad-hoc SQL Server queries in a custom UI Tree/Grid View. The ad-hoc SQL queries, which are generated on the client through the user interface, are essentially nested 'master-detail' (related) queries which e...
C# Example : AddDataAttachment2 Method of Chilkat C# Email Class Reference
Hi, I am trying to send email by using Chilkat API. I was using AddFileAttachment method as: obj_chmail.AddFileAttachment(filename); But in case of mail with large attachment i need to use: AddFileAttachment2 method with multipart ContentType. How to use it? I am not getting any example code. ...
MySQL - What is wrong with this query or my database? Terrible performance.
SELECT * from `employees` a LEFT JOIN (SELECT phone1 p1, count(*) c, FROM `employees` GROUP BY phone1) b ON a.phone1 = b.p1; I'm not sure if it is this query in particular that has the problem. I have been getting terrible performance in general with this database. The table in question has 120,000 rows. I have tried this particular q...
Read/Write/Find/Replace huge csv file
I have a huge (4,5 GB) csv file.. I need to perform basic cut and paste, replace operations for some columns.. the data is pretty well organized.. the only problem is I cannot play with it with Excel because of the size (2000 rows, 550000 columns). here is some part of the data: ID,Affection,Sex,DRB1_1,DRB1_2,SENum,SEStatus,AntiCCP,RFU...
ado.net slow updating large tables
The problem: 100,000+ name & address records in an access table (2003). Need to iterate through the table & update detail with the output from a 3rd party dll. I currently use ado, and it works at an acceptable speed (less than 5 minutes on a network share). We will soon need to update to access 2007 and its 'non jet' accdb format to ...
Scalable / Parallel Large Graph Analysis Library?
I am looking for good recommendations for scalable and/or parallel large graph analysis libraries in various languages. The problems I am working on involve significant computational analysis of graphs/networks with 1-100 million nodes and 10 million to 1+ billion edges. The largest SMP computer I am using has 256 GB memory, but I also...
Reading a large file into Perl array of arrays and manipulating the output for different purposes
Hello, I am relatively new to Perl and have only used it for converting small files into different formats and feeding data between programs. Now, I need to step it up a little. I have a file of DNA data that is 5,905 lines long, with 32 fields per line. The fields are not delimited by anything and vary in length within the line, but...
k-means clustering in R on very large, sparse matrix?
Hello, I am trying to do some k-means clustering on a very large matrix. The matrix is approximately 500000 rows x 4000 cols yet very sparse (only a couple of "1" values per row). The whole thing does not fit into memory, so I converted it into a sparse ARFF file. But R obviously can't read the sparse ARFF file format. I also have th...
xmlhttprequest request uri too large
Hi, Well I hoped everything would work fine finally. But of course it doesn't. The new problem is the following message: Request-URI Too Large The requested URL's length exceeds the capacity limit for this server. My fear is that I have to find another method of transmitting the data or is a solution possible? Code of XHR function: ...
How to declare ULARGE_INTEGER in c#?
Based upon this question How to declarate LARGE_INTEGER in C# with answer of: [StructLayout(LayoutKind.Absolute, Size=8)] struct LARGE_INTEGER { [FieldOffset(0)]public Int64 QuadPart; [FieldOffset(0)]public UInt32 LowPart; [FieldOffset(4)]public Int32 HighPart; } Is my assumption below for declaring ULARGE_INTEGER correct?...
Large Video Uploads via a website
Some of the problems that can happen are timeouts, disconnections, and not being able to resume a file and having to start from the beginning. Assuming these files are up to around 5gigs in size, what is the best solution for dealing with this problem? I'm using a Drupal 6 install for the website. Some of my constraints due to the ser...
Large-scale design in Haskell?
Dear all, What is a good way to design/structure large functional programs, especially in Haskell? I've been through a bunch of the tutorials (Write Yourself a Scheme being my favorite, with Real World Haskell a close second) - but most of the programs are relatively small, and single-purpose. Additionally, I don't consider some of th...
Clustering with bigkmeans from bigmemory package in R?
I recently started experimenting with the biganalytics package for R. I ran into a problem however... I am trying to run bigkmeans with a cluster number of about 2000 e.g clust <- bigkmeans(mymatrix, centers=2000) However, I get the following error: Error in 1:(10 + 2^k) : result would be too long a vector Can someone maybe give me a...
Serialising and Deserialising V.Large Dictionary in C#
We have a v.large Dictionary<long,uint> (several million entries) as part of a high performance C# application. When the application closes we serialise the dictionary to disk using BinaryFormatter and MemoryStream.ToArray(). The serialisation returns in about 30 seconds and produces a file about 200MB in size. When we then try to deseri...