This error message you are seeing is what Andreas was talking about - you must use the ext4-based version, as you will not need any option with your size LUNS. The 'must use force_over_8tb' error is the key here, you most certainly want/need to *.ext4.rpm versions of stuff. cliffw
On Thu, Jul 14, 2011 at 11:10 AM, Theodore Omtzigt <t...@stillwater-sc.com>wrote: > Michael: > > The reason I had to do it on the OST's is because when issuing the > mkfs.lustre command to build the OST it would error out with the message > that I should use the force_over_8tb mount option. I was not able to > create an OST on that device without the force_over_8tb option. > > Your insights on the writeconf are excellent: good to know that > writeconf is solid. Thank you. > > Theo > > On 7/14/2011 1:29 PM, Michael Barnes wrote: > > On Jul 14, 2011, at 1:15 PM, Theodore Omtzigt wrote: > > > >> Two part question: > >> 1- do I need to set that parameter on the MGS/MDS server as well > > No, they are different filesystems. You shouldn't need to do this on the > OSTs either. You must be using an older lustre release. > > > >> 2- if yes, how do I properly add this parameter on this running Lustre > >> file system (100TB on 9 storage servers) > > covered > > > >> I can't resolve the ambiguity in the documentation as I can't find a > >> good explanation of the configuration log mechanism that is being > >> referenced in the man pages. The fact that the doc for --writeconf > >> states "This is very dangerous", I am hesitant to pull the trigger as > >> there is 60TB of data on this file system that I rather not lose. > > I've had no issues with writeconf. Its nice because it shows you the old > and new parameters. Make sure that the changes that you made were the what > you want, and that the old parameters that you want to keep are still in > tact. I don't remember the exact circumstances, but I've found settings > were lost when doing a writeconf, and I had to explictly put these settings > in tunefs.lustre command to preserve them. > > > > -mb > > > > -- > > +----------------------------------------------- > > | Michael Barnes > > | > > | Thomas Jefferson National Accelerator Facility > > | Scientific Computing Group > > | 12000 Jefferson Ave. > > | Newport News, VA 23606 > > | (757) 269-7634 > > +----------------------------------------------- > > > > > > > > > > > _______________________________________________ > Lustre-discuss mailing list > Lustre-discuss@lists.lustre.org > http://lists.lustre.org/mailman/listinfo/lustre-discuss > -- cliffw Support Guy WhamCloud, Inc. www.whamcloud.com
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