NTFS and FAT Performance
NTFS has a bit map of free space, one cluster corresponds to 1 bit. To find disk
space had to assess the quantities in the tens of times smaller than in systems
FAT and FAT32. Conclusion: NTFS is the most effective system for finding free
space. It is noteworthy that the act "in the forehead" to the FAT16 or FAT32
very slowly, so in order to find a free space in these systems are different
methods of optimization, resulting in there and achieved acceptable speed. (One
can say for sure-the search space when working in DOS to FAT32-catastrophic
speed the process, because no optimization is not possible without the support
of at least as serious operating system). Working with catalogs and files Each
file system performs basic operations with the file-access, deleting, creating,
moving, etc. The speed of these operations depends on the organization of data
storage on individual files and directories of the device structures. At that
affects this option: to speed the implementation of any transactions with the
file, including any operation at the speed of file access, particularly in the
directories with a large number of files (thousands). FAT16 and FAT32 are very
compact directories, the size of each record are extremely small. In addition,
because the current system of storing historically long file names (more than 11
characters), in catalogs FAT system used is not very effective and at first
glance a crooked, but very economical storage of the structure of the long file
names. Working with catalog FAT done fairly quickly, as in the vast majority of
cases folder (directory data file) and is not fragmented on the disk in one
place. The only problem that could significantly lower the speed catalogs - FAT
large number of files in a single directory (in the order of thousands or more).
Data-Storage System linear array is not able to effectively search files in a
directory, and to find the file perebirat accounted for a large amount of data (the
average half-catalog file). NTFS uses a much more effective way of addressing -
binary tree. It allows to effectively work with the catalog of any size-NTFS
directories not frightening increase in the number of files in one directory,
and to tens of thousands.
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