Re: Scanning hard drive
- From: "Stephany Young" <noone@localhost>
- Date: Mon, 22 Oct 2007 15:49:01 +1300
Approx. 13 seconds on a 250GB disk with 30,000+ directories and 1,000,000+ files.
What is DriveData? (You omitted to post it).
What do you do with the content of DriveData when the call to ScanFolder(...) returns?
"Rotsey" <malcolm_smith@xxxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message news:eiuJvfEFIHA.4752@xxxxxxxxxxxxxxxxxxxxxxx
OK. Here is the class the scans the drive.
Can you see any issues here?
Bela, would you be able to post your code that scans the drive.
I am scanning 56GB in about 10 minutes.
public struct PieFileInfo
{
public int RowID;
public PieInfoType Type;
public string Name;
public string FullName;
public double Filesize;
public DateTime LastAccess;
public DateTime Created;
public string Extension;
public DateTime LastWrite;
public int ParentFolderRowID;
public string Drive;
public double FileAge1;
public double FileAge2;
public double FileAge3;
public bool IsRoot;
}
public class ScanDrive
{
private DriveData mList = new DriveData();
public DriveData DataList
{
get { return mList; }
set { mList = value; }
}
private string mDrive;
private int mNewFolderID = 0;
public ScanDrive(string drivefolder)
{
mDrive = drivefolder;
mList.Drive = drivefolder;
}
public bool ScanFolder(string folder, int folderID, ref double psize1, ref double psize2, ref double psize3)
{
DirectoryInfo objDir = new DirectoryInfo(folder);
int newFolderID;
double size1 = 0;
double size2 = 0;
double size3 = 0;
System.DateTime fileDate;
try
{
newFolderID = WriteRow(objDir, folderID);
if (newFolderID == 0)
{
return false;
}
foreach (DirectoryInfo dir in objDir.GetDirectories())
{
if (!ScanFolder(dir.FullName, newFolderID, ref psize1,ref psize2,ref psize3))
{
return true;
}
size1 += psize1;
size2 += psize2;
size3 += psize3;
}
foreach (FileInfo fle in objDir.GetFiles())
{
WriteRow(fle, newFolderID);
fileDate = GetAgeDate(fle);
if (fileDate >= DateTime.Today.AddDays(Settings.Instance.SettingsData.Age1Days * -1))
size1 += fle.Length;
else if (fileDate >= DateTime.Today.AddDays(Settings.Instance.SettingsData.Age2Days * -1))
size2 += fle.Length;
else
size3 += fle.Length;
}
UpdateFolderRow(newFolderID, size1, size2, size3);
psize1 = size1;
psize2 = size2;
psize3 = size3;
return true;
}
catch (Exception)
{
return true;
}
}
private DateTime GetAgeDate(FileInfo f)
{
if (f.CreationTime >= DateTime.Today.AddDays(Settings.Instance.SettingsData.Age1Days * -1))
return f.CreationTime;
else if (f.LastWriteTime >= DateTime.Today.AddDays(Settings.Instance.SettingsData.Age2Days * -1))
return f.LastWriteTime;
else
return f.LastAccessTime;
}
private int WriteRow(DirectoryInfo dir, int folderID)
{
PieFileInfo info = new PieFileInfo();
if (mNewFolderID == 0)
info.IsRoot = true;
mNewFolderID++;
info.RowID = mNewFolderID;
info.Type = PieInfoType.Folder;
info.FullName = dir.FullName;
info.Name = dir.Name;
info.LastAccess = dir.LastAccessTime;
info.LastWrite = dir.LastWriteTime;
info.Created = dir.CreationTime;
info.ParentFolderRowID = folderID;
info.Drive = mDrive;
mList.DataList.Add(info);
return mNewFolderID;
}
private int WriteRow(FileInfo file, int folderID)
{
PieFileInfo info = new PieFileInfo();
info.Type = PieInfoType.File;
info.Name = file.Name;
info.FullName = file.FullName;
info.Filesize = file.Length;
info.Extension = file.Extension;
info.LastAccess = file.LastAccessTime;
info.LastWrite = file.LastWriteTime;
info.Created = file.CreationTime;
info.ParentFolderRowID = folderID;
info.Drive = mDrive;
if (file.LastAccessTime >= DateTime.Today.AddDays(-30))
info.FileAge1 = file.Length;
else if (file.LastAccessTime >= DateTime.Today.AddDays(-60))
info.FileAge2 = file.Length;
else
info.FileAge3 = file.Length;
mList.DataList.Add(info);
return folderID;
}
private void UpdateFolderRow(int folderID, double size1, double size2, double size3)
{
int index = mList.DataList.FindIndex(delegate(PieFileInfo fi)
{
if (fi.Type == PieInfoType.Folder && fi.RowID == folderID)
return true;
else
return false;
});
PieFileInfo info = mList.DataList[index];
info.FileAge1 += size1;
info.FileAge2 += size2;
info.FileAge3 += size3;
info.Filesize += size1 + size2 + size3;
mList.DataList[index] = info;
}
}
"Bela Istok" <bela_i@xxxxxxxxxxx> wrote in message news:ED0DEFAE-1EB6-4DEF-96F8-CE11CAB9B316@xxxxxxxxxxxxxxxxWhat do you scan? I do a directory and File scan in my 100GB (64GB of data) hard drive and took 24 seconds. (Scanned every directory and every file in the drive for info).
PD: for reference 170,187 files and 21,899 folders.
Regards,
Bela Istok
"Rotsey" <malcolm_smith@xxxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message news:errJ9I6EIHA.1208@xxxxxxxxxxxxxxxxxxxxxxxHi,
I am writing an app that scans hard drives and logs info
about every fine on the drive.
The first iteration of my code used a class and a generic list
to store the data and rhis took 13min on my 60 GB drive.
I wanted it to be quicker.
So the second time I changed the class to a struct and still
with the generic list got the time down to 4 min.
I am wondering if I can improve on this even more??
Anyone know if it would be possible to improve this
using C# or would it need to be wrritten in assembler or the like?
rotsey
.
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