FUJITA Tomonori schrieb: >>> No more I/O errors from open-iscsi side as well. >> I'm running a bit different "test" now and I'm getting host resets on >> open-iscsi side every few minutes: >> >> connection3:0: iscsi: detected conn error (1011) >> iscsi: host reset succeeded >> >> >> The "test" is using DRBD over a slow link. >> In such case (background synchronization running over a slow link), for >> tgtd, DRBD device for look like one that returns reads fast (say, 50 >> MB/s), but any write, even small, can potentially wait several seconds >> to complete (with average speed of about 200 kB/s and long delays). >> >> How can I check what causes these resets? > > Have you already checked the tcpdump log? Not yet - I was transferring several gigabytes, I wouldn't like to have tcpdump logs of this size... Other way to reproduce it is establishing a link with a slow speed between the target and the initiator (i.e., "--shaper 50000" option to openvpn), and reading/writing data. You will see device resets, and eventually, I/O errors on the initiator; with no errors on the target. Anyway, it is something with open-iscsi, as it's reproducible with IET as well, so I'll ask at open-iscsi list. -- Tomasz Chmielewski http://wpkg.org -- To unsubscribe from this list: send the line "unsubscribe stgt" in the body of a message to majordomo at vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html |