> On Jun 20, 2016, at 5:15 AM, Ulrich Leodolter <ulrich.leodolter at obvsg.at> wrote: > > has anyone an idea why iSCSI read performance degraded in CentOS 7.2 ? I'm not sure about those versions of centos, but iSCSI throughput being TCP is dependent on TCP receive window and packet loss. Tcpdump to see if the TCP window changed between those versions of centos.