On 19/02, [email protected] wrote: > Hi Gorka > > I did a general search of AEN/AER, looks like they had been > obsoleted: > http://www.santrainingblog.com/2010/04/asynchronous-event-notification-aen/ > > Notice that AEN/AER was removed in sam3 (scsi architectural model 3, > sam3r14 release in 2004/09/21). > Current sam4 (sam4r14) and last sam5 SCSI draft (sam5r04) no more speak > about AEN/AER. > > The last reference of AER was in sam2 (sam2r24 2002/09/12) and spc2r20 > (2001/07/18).
Yes, AEN/AER is not supported by all arrays, but there are a lot of storage arrays out there that actually support it. > > Thanks > Peter > 在 2017年2月18日星期六 UTC+8上午12:04:54，Gorka Eguileor写道： > > > > On 17/02, [email protected] <javascript:> wrote: > > > Hi Gorka > > > > > > Definitely, the "AEN/AER" approach deserves a try, I will let you know > > if > > > it's applicable for my situation. > > > > > > For the sysfs way, do you mean echo a command to the host like below: > > > > > > echo "c t l" > "/sys/class/scsi_host/host#/scan" > > > > > > > Yes, replacing c, t, l, and # with the corresponding values. > > > > You can find it explained in here > > > > https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/5/html/Online_Storage_Reconfiguration_Guide/adding_storage-device-or-path.html > > > > Cheers, > > Gorka. > > > > > > > > Thanks > > > Peter > > > > > > 在 2017年2月15日星期三 UTC+8下午11:52:19，Gorka Eguileor写道： > > > > > > > > On 15/02, Peter Wang wrote: > > > > > Hi > > > > > > > > > > I am investing new ways to discover LUN exposed by iSCSI targets. > > > > > > > > > > Currently, most of tools/libs are using user land shell commands > > > > "iscsiadm" > > > > > to login targets or rescan new LUNs. > > > > > sometimes, as I observed, the rescan is time-consuming. in > > > > high-concurrency > > > > > environment, the overhead by executing massive shell commands cannot > > be > > > > > ignored. > > > > > > > > > > So, my question is: can we use socket or other efficient ways to > > trigger > > > > > actions that we do with "iscsiadm"? > > > > > > > > > > Appreciate if you can help on this. > > > > > > > > > > Thanks > > > > > Peter > > > > > > > > > > > > > Hi Peter, > > > > > > > > I'm no expert, but if you are already logged in and your target > > supports > > > > AEN/AER packets, then iscsid will automatically send a scan request to > > > > discover changed LUNs, and if it doesn't support it you could use the > > > > sysfs interface from your code and request a scan writing "c t l" > > (where > > > > c=channel t=target l=lun and wildcard - can be used) to > > > > /sys/class/scsi_host/host#/scan. > > > > > > > > I know this is not what you were looking for, but maybe it can > > alleviate > > > > your issues until someone with more knowledge gives you the silver > > > > bullet you wanted. > > > > > > > > Cheers, > > > > Gorka. > > > > > > > > > > -- > > > 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 [email protected] <javascript:>. > > > To post to this group, send email to [email protected] > > <javascript:>. > > > Visit this group at https://groups.google.com/group/open-iscsi. > > > For more options, visit https://groups.google.com/d/optout. > > > > > > -- > 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 [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/open-iscsi. > For more options, visit https://groups.google.com/d/optout. -- 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 [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/open-iscsi. For more options, visit https://groups.google.com/d/optout.
