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Hi all, I'm trying to back our grid and Alice xrootd cache (~200TB) with gStore, our local mass storage system at GSI. Staging from gStore, if files are not in xrootd cache, works fine so far, however, migration to gStore does not work at all. I'm testing with a file server looking as follows: ------------------------------------------------- 2 file systems: /data1, /data2 name space file system (links) in /data1 top migratable path /data1/gstore data file systems in /data1/cache, /data2/cache relevant configuration parameters: --------------------------------- oss.localroot /data1 oss.cache public /data1/cache oss.cache public /data2/cache olb.path w /scratch olb.path ws /gstore oss.path /scratch nomig oss.path /gstore mig rcreate nodread oss.nocheck oss.nodread mps.scan /data1/gstore mps.basedir /data1/gstore mps.mssdir /gstore For migration, mps_MigrPurg is started with options -M -c conffile -l logfile In some rare, but not reproducible cases migration takes place if new files appear in a special path!!! (e.g. /data1/gstore/lmdv/diskn). Migration never takes place e.g. from /data1/gstore/goeri/lmdv/diskn!!!! Is there something fundamental missing? Thanks for your help! Horst Goeringer