Messages in this thread | | | Subject | VFAT truncate performance | From | Mattias Rönnblom <> | Date | 05 Sep 2006 15:52:46 +0200 |
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Hi,
extending files by ftruncate(2) runs very slow on VFAT file systems. On my USB harddisk w/ VFAT, it takes 14 seconds to extend an empty file to 1 GB. On a memory stick, it takes well over 4 minutes.
My question is: is this problem on the conceptual level (ie there is no way of extending files on FAT that doesn't involve many disk operations) or is the current Linux fs driver suboptimal in this respect?
The reason for asking is that I run Samba which service files on USB devices (w/ VFAT for portability) to Windows XP clients. When copying files to the Samba server, Microsoft SMB clients seem to extend the file before actually starting to copy the data. This results in sluggishness and timeouts when copying large files to VFAT filesystems.
Thanks, Mattias
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