Hi Anand Babu Periasamy, Yes, I can read /gdata/projects/philex/OAG/2011/May16/mdor3km07/coast_den2.in directly from the backend disk (specifically: logged onto machine containing the disk and did a more). Furthermore I can read (i.e. "more") that file other nodes in our cluster going through gluster. Following up on another lead from this list, the TSM software is not using direct i/o (O_DIRECT). > On Mon, Jun 27, 2011 at 12:08 PM, Pat Haley <phaley at mit.edu > <mailto:phaley at mit.edu>> wrote: > > > Hi > > We have been trying back-up a glusterfs (v3.1.4) area using > the Tivoli TSM software to an off-site area. The back-up > keeps failing with the following typical error messages > > 06/14/2011 22:22:58 ANS1587W I/O error reading file attributes for: > /gdata/projects/philex/OAG/__2011/May16/mdor3km10/coast___den2.in > <http://coast_den2.in>. errno = 22, Invalid argument > > 06/14/2011 22:22:59 ANS4007E Error processing > '/gdata/projects/philex/OAG/__2011/May16/mdor3km07/coast___den2.in > <http://coast_den2.in>': access to the object is denied > > We originally thought the problem was bad meta-pointer files, > but we still experience the failures after deleting all meta-pointer > files. > > Has anyone else experienced/solved this problem? > > -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=__-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=__-=-=- > Pat Haley Email: phaley at mit.edu > <mailto:phaley at mit.edu> > Center for Ocean Engineering Phone: (617) 253-6824 > <tel:%28617%29%20253-6824> > Dept. of Mechanical Engineering Fax: (617) 253-8125 > <tel:%28617%29%20253-8125> > MIT, Room 5-222B http://web.mit.edu/phaley/www/ > 77 Massachusetts Avenue > Cambridge, MA 02139-4301 > _________________________________________________ > Gluster-users mailing list > Gluster-users at gluster.org <mailto:Gluster-users at gluster.org> > http://gluster.org/cgi-bin/__mailman/listinfo/gluster-users > <http://gluster.org/cgi-bin/mailman/listinfo/gluster-users> > > > > Hi Pat, Let me get some one from the engineering team to coordinate with > you. For now, you can check this: > > '/gdata/projects/philex/OAG/__2011/May16/mdor3km07/coast___den2.in > <http://coast_den2.in/> > This file must exist on one of the backend disks. See if you can > directly read from the backend disks. If it is not a bad backend disk, > then it is a GlusterFS issue. > > If you provide us remote access via reverse-ssh / screen or webex, we > can quickly narrow down. We don't have a TSM environment in our labs. > You can help us validate compatibility. > > Also I am not sure if TSM allows scripting. If we can make TSM tools use > GlusterFS 3.2 marker APIs, then you can achieve continuous backup > functionality (backup data as and when it changes, without crawling the > name space). It will significantly improve your backup performance (no > more backup windows). Marker APIs can even be invoked via shell > scripting using attr tools. > > -- > Anand Babu Periasamy > Blog [http://www.unlocksmith.org <http://www.unlocksmith.org/>] > > Imagination is more important than knowledge --Albert Einstein -- -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Pat Haley Email: phaley at mit.edu Center for Ocean Engineering Phone: (617) 253-6824 Dept. of Mechanical Engineering Fax: (617) 253-8125 MIT, Room 5-222B http://web.mit.edu/phaley/www/ 77 Massachusetts Avenue Cambridge, MA 02139-4301
