Hi, I found some "dd" operations were launched contiguously in my vdsm.log. Is this harmful? How was this operation caused?
From vdsm.log:
Dummy-51000::DEBUG::2012-10-11 15:38:57,243::__init__::1249::Storage.Misc.excCmd::(_log) 'dd if=/rhev/data-center/6f6d4801-7447-48ea-b516-627d83e7801e/mastersd/dom_md/inbox iflag=direct,fullblock count=1 bs=1024000' (cwd None) Dummy-51000::DEBUG::2012-10-11 15:38:57,305::__init__::1249::Storage.Misc.excCmd::(_log) SUCCESS: <err> = '1+0 records in\n1+0 records out\n1024000 bytes (1.0 MB) copied, 0.0388821 s, 26.3 MB/s\n'; <rc> = 0 Dummy-51000::DEBUG::2012-10-11 15:38:59,313::__init__::1249::Storage.Misc.excCmd::(_log) 'dd if=/rhev/data-center/6f6d4801-7447-48ea-b516-627d83e7801e/mastersd/dom_md/inbox iflag=direct,fullblock count=1 bs=1024000' (cwd None) Dummy-51000::DEBUG::2012-10-11 15:38:59,375::__init__::1249::Storage.Misc.excCmd::(_log) SUCCESS: <err> = '1+0 records in\n1+0 records out\n1024000 bytes (1.0 MB) copied, 0.0398412 s, 25.7 MB/s\n'; <rc> = 0 Dummy-51000::DEBUG::2012-10-11 15:39:01,383::__init__::1249::Storage.Misc.excCmd::(_log) 'dd if=/rhev/data-center/6f6d4801-7447-48ea-b516-627d83e7801e/mastersd/dom_md/inbox iflag=direct,fullblock count=1 bs=1024000' (cwd None) Dummy-51000::DEBUG::2012-10-11 15:39:01,445::__init__::1249::Storage.Misc.excCmd::(_log) SUCCESS: <err> = '1+0 records in\n1+0 records out\n1024000 bytes (1.0 MB) copied, 0.0393934 s, 26.0 MB/s\n'; <rc> = 0 Dummy-51000::DEBUG::2012-10-11 15:39:03,453::__init__::1249::Storage.Misc.excCmd::(_log) 'dd if=/rhev/data-center/6f6d4801-7447-48ea-b516-627d83e7801e/mastersd/dom_md/inbox iflag=direct,fullblock count=1 bs=1024000' (cwd None) Dummy-51000::DEBUG::2012-10-11 15:39:03,515::__init__::1249::Storage.Misc.excCmd::(_log) SUCCESS: <err> = '1+0 records in\n1+0 records out\n1024000 bytes (1.0 MB) copied, 0.0391104 s, 26.2 MB/s\n'; <rc> = 0 -- --- 舒明 Shu Ming Open Virtualization Engineerning; CSTL, IBM Corp. Tel: 86-10-82451626 Tieline: 9051626 E-mail: shuming@cn.ibm.com or shuming@linux.vnet.ibm.com Address: 3/F Ring Building, ZhongGuanCun Software Park, Haidian District, Beijing 100193, PRC