Dear list, We have got this llog error every 15 minutes in recent days on a MDS server. kernel: LustreError: 25252:0:(llog_cat.c:165:llog_cat_id2handle()) log 0xbc28013 generation f77a29 8 != 366c0f84 Oct 28 08:27:06 beshome01 kernel: LustreError: 25252:0:(llog_cat.c:165:llog_cat_id2handle()) Skipped 110 previous similar me ssages This MDS server is shared with a OST server, and the Memory usage is always 100% However, this error appear only recently. I am not sure what does this error mean. Any ideas? Best Regards Lu Wang -------------------------------------------------------------- Computing Center IHEP Office: Computing Center,123 19B Yuquan Road Tel: (+86) 10 88236012-607 P.O. Box 918-7 Fax: (+86) 10 8823 6839 Beijing 100049,China Email: Lu.Wang at ihep.ac.cn --------------------------------------------------------------