On Wed, Nov 10, 2010 at 8:10 PM, Josef Bacik <[email protected]> wrote: > On Wed, Nov 10, 2010 at 12:02:18PM -0600, Mitch Harder wrote: >> Update the mkfs.btrfs man page for the -M option to mix data and >> metadata chunks. >> >> Signed-off-by: Mitch Harder <[email protected]> >> --- >> man/mkfs.btrfs.8.in | 5 +++++ >> 1 files changed, 5 insertions(+), 0 deletions(-) >> >> diff --git a/man/mkfs.btrfs.8.in b/man/mkfs.btrfs.8.in >> index 1e14c6c..c23dddc 100644 >> --- a/man/mkfs.btrfs.8.in >> +++ b/man/mkfs.btrfs.8.in >> @@ -9,6 +9,7 @@ mkfs.btrfs \- create an btrfs filesystem >> [ \fB \-l\fP\fI leafsize\fP ] >> [ \fB \-L\fP\fI label\fP ] >> [ \fB \-m\fP\fI metadata profile\fP ] >> +[ \fB \-M\fP\fI mixed data+metadata\fP ] >> [ \fB \-n\fP\fI nodesize\fP ] >> [ \fB \-s\fP\fI sectorsize\fP ] >> [ \fB \-h\fP ] >> @@ -45,6 +46,10 @@ Specify a label for the filesystem. >> Specify how metadata must be spanned across the devices specified. Valid >> values are raid0, raid1, raid10 or single. >> .TP >> +\fB\-M\fR, \fB\-\-mixed\fR >> +Mix data and metadata chunks together for more efficient space >> +utilization. >> +.TP >> \fB\-n\fR, \fB\-\-nodesize \fIsize\fR >> Specify the nodesize. By default the value is set to the pagesize. >> .TP >> -- >> 1.7.2.2 > > Let's mention that it's for smaller filesystems since it has a significant > performance impact when using mixed block groups on larger filesystems. > Thanks, > > Josef >
OK, how about: Mix data and metadata chunks together for more efficient space utilization, especially on smaller file systems. Incurs a performance penalty. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
