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POHow to split a huge folder?
 

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  1. POHow to split a huge folder?
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    <p>We have a folder on Windows that's ... huge. I ran "dir > list.txt". The command lost response after 1.5 hours. The output file is about 200 MB. It shows there're at least 2.8 million files. I know the situation is stupid but let's focus the problem itself. If I have such a folder, how can I split it to some "manageable" sub-folders? Surprisingly all the solutions I have come up with all involve getting all the files in the folder at some point, which is a no-no in my case. Any suggestions?</p> <p>Thank Keith Hill and Mehrdad. I accepted Keith's answer because that's exactly what I wanted to do but I couldn't quite get PS working quickly.</p> <p>With Mehrdad's tip, I wrote this little program. It took 7+ hours to move 2.8 million files. So the initial dir command did finish. But somehow it didn't return to console.</p> <pre><code>namespace SplitHugeFolder { class Program { static void Main(string[] args) { var destination = args[1]; if (!Directory.Exists(destination)) Directory.CreateDirectory(destination); var di = new DirectoryInfo(args[0]); var batchCount = int.Parse(args[2]); int currentBatch = 0; string targetFolder = GetNewSubfolder(destination); foreach (var fileInfo in di.EnumerateFiles()) { if (currentBatch == batchCount) { Console.WriteLine("New Batch..."); currentBatch = 0; targetFolder = GetNewSubfolder(destination); } var source = fileInfo.FullName; var target = Path.Combine(targetFolder, fileInfo.Name); File.Move(source, target); currentBatch++; } } private static string GetNewSubfolder(string parent) { string newFolder; do { newFolder = Path.Combine(parent, Path.GetRandomFileName()); } while (Directory.Exists(newFolder)); Directory.CreateDirectory(newFolder); return newFolder; } } } </code></pre>
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    1. COUh... write your own implementation of NTFS and have it split up the `$INDEX_ALLOCATION` binary search tree? Have fun though...
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    2. COBy the way, why can't you get a list of all the files? Does the `FindNextFile` function also consume so much time/resources, or is it just `dir` that does that?
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    3. CO@Mehrdad, because it's just too slow. FindNextFile seems promising. Will try that.
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      1. USKai Wang
 

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