Thank you so much to all the staff who tried to help me in understanding and solving my problem.
I tried several solution to be able to load a lot of data and stored in a table. After two days, here are my tests and finally the solution which can store 4'191'893'824 entry into one array
I add my final solution, hoping someone could help
the goal
I recall the goal: Initialize an integer array [2048/1024/2048] for storing 4'191'893'824 data
Test 1: with JaggedArray method (failure)
system out of memory exception thrown
/* ******************** */
/* Jagged Array method */
/* ******************** */
// allocate the first dimension;
bigData = new int[2048][][];
for (int x = 0; x < 2048; x++)
{
// allocate the second dimension;
bigData[x] = new int[1024][];
for (int y = 0; y < 1024; y++)
{
// the last dimension allocation
bigData[x][y] = new int[2048];
}
}
Test 2: with List method (failure)
system out of memory exception thrown (divide the big array into several small array .. Does not work because "List <>" allows a maximum of "2GB" Ram allocution like a simple array unfortunately.)
/* ******************** */
/* List method */
/* ******************** */
List<int[,,]> bigData = new List<int[,,]>(512);
for (int a = 0; a < 512; a++)
{
bigData.Add(new int[256, 128, 256]);
}
Test 3: with MemoryMappedFile (Solution)
I finally finally found the solution! Use the class "Memory Mapped File" contains the contents of a file in virtual memory.
MemoryMappedFile MSDN Use with custom class that I found on codeproject here. The initialization is long but it works well!
/* ************************ */
/* MemoryMappedFile method */
/* ************************ */
string path = AppDomain.CurrentDomain.BaseDirectory;
var myList = new GenericMemoryMappedArray<int>(2048L*1024L*2048L, path);
using (myList)
{
myList.AutoGrow = false;
/*
for (int a = 0; a < (2048L * 1024L * 2048L); a++)
{
myList[a] = a;
}
*/
myList[12456] = 8;
myList[1939848234] = 1;
// etc...
}