>> On Wed, Jan 15, 2003 at 11:21:34AM -0800, Browning, Jeff wrote:
>> > 1. Flush all data in the local file system buffer cache to disk
>> > (effectively a synchronous sync);
>> > 2. Halt all pending I/O to the file system until unlockfs is
>> > issued. (If the file system is mounted hard, all processes attempting
>> > to access the file system simply hang for this period.)
>> man xfs_freeze
There is also a kernel patch available from the LVM project that does this
automatically when you perform an LVM snapshot. (Search for "VFS lock patch")
The SuSE kernels already have this patch installed, I don't know about the
other distros.
Of course, if you are not doing LVM snapshots, the patch is useless.
Greg Freemyer
|