On Thu, 2005-07-28 at 12:09 -0700, Nathaniel Stahl wrote: > We'd like to be able to create a large number of LVs (potentially > numbering in the low thousands). I get failure after LV 226 or so, > though - "VG VolGroup01 metadata writing failed". > > RedHat claims this should be possible with LVM2 on the following web page: > > http://www.redhat.com/magazine/009jul05/features/lvm2/ > > I admit to being a little suprised at the 2^32 max LV claim - I was > figuring 2^20 as the theoretical max given 2.6's 32 bit device numbering > scheme (20 bits for minor, 12 bits for major). > > The LVM2 code, at least version 2.00.25 as distributed in FC3, appears > to have a check that the minor number is strictly less than 256. > Removing this check allows for the creation of working LVs using minors > greater than 256, but LV creation fails with the error "VG VolGroup01 > metadata writing failed" creating the 227th LV. Even with the minor > limit in place - I can't create more than 226 LVs. i asked this question before. there is a hard coded limitation in lvm metadata, so the real number is like this, limited around 2xx. the limitation will be removed in near future. how near? i do not know. :) > > Is there a patch that allows this limit to be broken? Should I be using > a newer version of the tools? If not currently possible, is this > something that will be in the near future? > > Thanks for any help/advice you can give. > > -Nate Stahl > > _______________________________________________ > linux-lvm mailing list > linux-lvm@redhat.com > https://www.redhat.com/mailman/listinfo/linux-lvm > read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/ _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
