Messages in this thread | | | Date | Fri, 24 Feb 2006 08:46:24 +1300 | From | Sam Vilain <> | Subject | Re: question about possibility of data loss in Ext2/3 file system |
| |
Theodore Ts'o wrote: >>Also, the scheme you mentioned is just for new file creation. What >>will happen if I want to update an existing file? Say, I open file A, >>seek to offset 5000, write 4096 bytes, and then close. Do you know how >>ext2/3 handle this situation? > If you have a power failure right after the close, the data could be > lost. This is true for pretty much all Unix filesystems, for > performance reasons. If you care about the data hitting disk, the > application must use fsync().
I always liked Sun's approach to this in Online Disk Suite - journal at the block device level rather than the FS / application level. Something I haven't seen from the Linux md-utils or DM.
Sam. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |