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Questions on iscsi and snapshots
Dear All, I have a question on iscsi and snapshots I have a lun named - vmware01 with 10 snaphosts I cloned the latest snapshots with name (vmware-new) and delete the above lun (vomware01 + snapshots) what happen right now is , all deleted items are moving to snapshots (see attached file) Is there any way to fully remove the deleted lun and snapshots? thanks gn00347026
Very poor performance on iSCSI
Starting situation: Windows 2012R2 with MPIO with 2 gigabit adapters. RN316 with 6.9.3, 6 Drives full. When a backup starts from the other NAS (same model) to this one (both DR or rsync) the iSCSI completely hangs. I have replicated machines from another Hyper-v on this iSCSI and the replica stops, the disk is lost, then re-appears but writes at some kb/sec. Just trying to create a directory on the disk takes hours (literally). So I started removing MPIO, using only 1 adapter. Same thing. Changed adpaters/cabling/switch: same thing. I removed the backups and only kept the iSCSI for the Hyper-V replica, it works but with very low performance. I mean 300 mbit peak going up and down to 0. It takes forever to replicate VMs. I use a thick 2.5T volume (with and without sync writes, problems are the same) I already discarded ReadyNAS solutions to have live hyper-v machines because it was badly off with performance, but I thought having replicas can be done. I was wrong. Looking at the data I get from SNMP I discovered the NAS is completely overloaded on the CPU side. The attached graph is from the NAS receiving a single VM replica and doing nothing else. The second graph is the network (peaks are at 300 mbit). From the same server I can pump to another brand NAS near to full gigabit speed (same cisco switch, same network adapter). What can I check to achieve decent performance and maybe have a backup starting without killing all the rest? Thanks
