+ if ($datasize > 4*1024*1024) {
+ my $metadatasize = $datasize/100; # default 1% of data
+ $metadatasize = 1024*1024 if $metadatasize < 1024*1024; # but at least 1G
+ $metadatasize = 16*1024*1024 if $metadatasize > 16*1024*1024; # but at most 16G
+
+ # otherwise the metadata is taken out of $minfree
+ $datasize -= 2*$metadatasize;
+
+ # 1 4MB PE to allow for rounding
+ $datasize -= 4*1024;
+