On Sun, May 25, 2014 at 9:42 AM, Thomas Glanzmann <thomas@xxxxxxxxxxxx> wrote: > Hallo Nab, > >> Usually spreading out the LUNs across multiple endpoints (eg: multiple >> IQNs) helps to reduce or completely eliminate the ESX host side issues. >> Typically you want to keep it around 4-5 LUNs per endpoint on 1 Gb/sec >> ports. > > in my case I had 3 LUNs per endpoint. With rts/os with the same config > it worked. But as soon as my time permits it, I'll hunt it down. > > Cheers, > Thomas Hi again, I managed to enable dynamic debugging on the Debian VMs as Thomas suggested and I've got some logs as the problem manifested itself again. More specifically, I started seeing datastores losing connection to the attached hosts and at some point the VM that hosts the iSCSI target crashed with a kernel panic. I've got an enormous amount of logs but I'm not quite sure which ones would more helpful to you: kern.log, debug, syslog, messages or all of them? All of them gziped have a size of around 700 mb (unzipped each one is around 2 GB). Would you be able to have a look at such big files? (I guess by targeting some specific output) By the way, I had also created multiple IQNs (one for each host accessing the LUN) as per Nicholas' suggestion (if I got it right). It can be seen below: /> ls / o- / ......................................................................................................................... [...] o- backstores .............................................................................................................. [...] | o- fileio ................................................................................................... [0 Storage Object] | o- iblock ................................................................................................... [1 Storage Object] | | o- 24378_iscsi .......................................................................................... [/dev/sdb activated] | o- pscsi .................................................................................................... [0 Storage Object] | o- rd_dr .................................................................................................... [0 Storage Object] | o- rd_mcp ................................................................................................... [0 Storage Object] o- ib_srpt ........................................................................................................... [0 Targets] o- iscsi ............................................................................................................. [4 Targets] | o- iqn.2003-01.org.linux-iscsi.sof-24378-iscsi-vm.x8664:sn.157f165e1e8d ................................................ [1 TPG] | | o- tpgt1 ........................................................................................................... [enabled] | | o- acls ............................................................................................................ [1 ACL] | | | o- iqn.1998-01.com.vmware:sof-24378-srv-4e00cca4 .......................................................... [1 Mapped LUN] | | | o- mapped_lun0 ............................................................................................. [lun0 (rw)] | | o- luns ............................................................................................................ [1 LUN] | | | o- lun0 .................................................................................. [iblock/24378_iscsi (/dev/sdb)] | | o- portals ...................................................................................................... [1 Portal] | | o- 10.23.84.24:3260 .................................................................................. [OK, iser disabled] | o- iqn.2003-01.org.linux-iscsi.sof-24378-iscsi-vm.x8664:sn.530795b8604a ................................................ [1 TPG] | | o- tpgt1 ........................................................................................................... [enabled] | | o- acls ............................................................................................................ [1 ACL] | | | o- iqn.1998-01.com.vmware:sof-24379-srv-4deee8c7 .......................................................... [1 Mapped LUN] | | | o- mapped_lun0 ............................................................................................. [lun0 (rw)] | | o- luns ............................................................................................................ [1 LUN] | | | o- lun0 .................................................................................. [iblock/24378_iscsi (/dev/sdb)] | | o- portals ...................................................................................................... [1 Portal] | | o- 10.23.84.24:3260 .................................................................................. [OK, iser disabled] | o- iqn.2003-01.org.linux-iscsi.sof-24378-iscsi-vm.x8664:sn.5ade2e691d69 ................................................ [1 TPG] | | o- tpgt1 ........................................................................................................... [enabled] | | o- acls ............................................................................................................ [1 ACL] | | | o- iqn.1998-01.com.vmware:sof-24380-srv-70a6f1be .......................................................... [1 Mapped LUN] | | | o- mapped_lun0 ............................................................................................. [lun0 (rw)] | | o- luns ............................................................................................................ [1 LUN] | | | o- lun0 .................................................................................. [iblock/24378_iscsi (/dev/sdb)] | | o- portals ...................................................................................................... [1 Portal] | | o- 10.23.84.24:3260 .................................................................................. [OK, iser disabled] | o- iqn.2003-01.org.linux-iscsi.sof-24378-iscsi-vm.x8664:sn.b6c7ee6c9448 ................................................ [1 TPG] | o- tpgt1 ........................................................................................................... [enabled] | o- acls ............................................................................................................ [1 ACL] | | o- iqn.1998-01.com.vmware:sof-24381-srv-7c9208f7 .......................................................... [1 Mapped LUN] | | o- mapped_lun0 ............................................................................................. [lun0 (rw)] | o- luns ............................................................................................................ [1 LUN] | | o- lun0 .................................................................................. [iblock/24378_iscsi (/dev/sdb)] | o- portals ...................................................................................................... [1 Portal] | o- 10.23.84.24:3260 .................................................................................. [OK, iser disabled] o- loopback .......................................................................................................... [0 Targets] o- qla2xxx ........................................................................................................... [0 Targets] o- tcm_fc ............................................................................................................ [0 Targets] If for some reason the formatting is not displayed properly, or for better readability check this screenshot: http://postimg.org/image/e358ov40r/full/ Thank you in advance for your help. Regards, Harry -- To unsubscribe from this list: send the line "unsubscribe target-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
