On Dec 15, 2016, at 7:14 AM, david.partri...@perdrix.co.uk wrote: > > Lee, > > It would appear that the guilty party was: > > node.conn[0].timeo.noop_out_interval = 5 > node.conn[0].timeo.noop_out_timeout = 5 > > I changed both of these to 0 for the tape device and the problem went away.
Excellent. > > Please note that the README.gz for open-scsi doesn't actually say that this > is what you need to do to disable the NOP-out polling, so could I suggest > that this be stated explicitly. My README says, in section 8.2: > For this setup, you can turn off iSCSI pings by setting: > > node.conn[0].timeo.noop_out_interval = 0 > node.conn[0].timeo.noop_out_timeout = 0 > I must admit that I find it hard to imagine that an iSCSI target would reply > to a NOP-out while it was processing a command such as a tape fsf or even > tape erase (whose timeout is 6 * the long-timeout of 4 hours). Should > perhaps the NOP-out polling be suspended while a command is being processed? > Or alternatively maybe the NOP-out polling be completely disabled by default > with something in the README.gz file that explains WHEN you might want it and > how to enable it. It's certainly clear that (at least) the MS iSCSI > initiator doesn't send NOP-out polls. open-iscsi is normally used to deal with discs. When it’s used with tape it’s not unusual to find bugs or design errors that we did not know were present. Perhaps a small blurb in the README about dealing with tape, suggesting turning NOOP/ping off. Please feel free to post a pull request on github or suggest a patch on this list. > > Regards > Dave -- Lee Duncan "Choice means saying no to one thing so you can say yes to another." -- Dan Millman -- You received this message because you are subscribed to the Google Groups "open-iscsi" group. To unsubscribe from this group and stop receiving emails from it, send an email to open-iscsi+unsubscr...@googlegroups.com. To post to this group, send email to open-iscsi@googlegroups.com. Visit this group at https://groups.google.com/group/open-iscsi. For more options, visit https://groups.google.com/d/optout.
