Can you please give advice about handling large data files with memory
management techniques? I am attempting to read three large files (1
GB, 208 MB, 725 MB) sequentially and place the data into arrays for
processing. Here is my psuedocode:
1) Import a file into NSString.
NSString *aFileString = [NSString stringWithContentsOfFile:
fileLocation]; // Convert file at path to myFileString text holder;
2) Use NSScanner pull out integers and floats
NSScanner *aFileScanner = [[NSScanner alloc] initWithString:
aFileString];
3) Store values into arrays.
float myFloats [100000][2000]; or
float myInts [100000][2000];
4) repeat three times with 3 different files.
This algorithm works for smaller files but chokes on the larger files
and I get malloc errors. I've attempted to use NSZone's to the same
failure.
Can you please give advice about handling large data files with memory
management techniques?
I have 4 GB ram and can hog off 2 - 3 GBs for the process. I don't
know how to explicitly allocate real memory. I'd rather not use
virtual memory. Any references or examples would be appreciated.
Thank you.
Carl
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