Hi! Another thing is: Whether you like systemd or not: It runs many processes automatically and concurrently. So it seems wise that iscasadm may be run concurrently. If there are issues, iscsiadm should use a MUTEX internally to avoid those IMHO
Regards, Ulrich >>> Vojtech Juranek <vjura...@redhat.com> schrieb am 20.10.2021 um 08:58 in Nachricht <4882593.9CP3fYhb5E@localhost.localdomain>: > Hi, > I'd like to follow up with discussion about concurrent usage iscsiadm tool. > It > was discussed here about year ago, with suggestion not to use it > concurrently > [1]. On the other hand, comment [2] says it should be fine. Is the an > agreement > in open-iscsi community if the concurrent usage of iscsiadm is safe or not? > If > it's not safe, is there any bug for open-iscsi describing the issue and > potential problems if iscsiadm is used concurrently? > > The motivation why I'm popping up this again is that in oVirt project [3] we > > use a lock before calling iscsiadm to make sure it's not run in parallel. > This > causes us various issues (see e.g. BZ #1787192 [2]) and we'd like to get rid > > off this lock. > > I run several thousands tests with our typical usage of iscsiadm [4], > running > iscsiadm in parallel and haven't spot any issue so far. This suggests > removing > the lock can be safe, but of course my tests could be just a pure luck. So > before removing this lock from our code base, I'd like to know your thoughts > > about it. > > Thanks > Vojta > > [1] https://groups.google.com/g/open-iscsi/c/OHOdIm1W274/m/9l5NcPQHBAAJ > [2] https://bugzilla.redhat.com/show_bug.cgi?id=1787192#c18 > [3] https://www.ovirt.org/ > [4] https://github.com/oVirt/vdsm/blob/master/tests/storage/stress/ > initiator.py > > -- > 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 view this discussion on the web visit > https://groups.google.com/d/msgid/open-iscsi/4882593.9CP3fYhb5E%40localhost.l > ocaldomain. -- 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 view this discussion on the web visit https://groups.google.com/d/msgid/open-iscsi/61710666020000A100044B4B%40gwsmtp.uni-regensburg.de.
