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Model ReadyNAS 4312 (did not have that in Model selection, when creating this discussin).
Firmware 6.7.5
*My "setup"
ESXi 6.0
EMC SAN for Production Servers (10GB Base-T)
Readynas 4312 is used for non-productions servers and SMB Shares for backups. The Readynas has two 10GB base t, one of those NIC's is in a physically seperate (different switches) and seperate network (10.0.10.0/24) for Iscsi traffic (where VM's live), and the other NIC is on physically seperated network, used for SMB shares (10.3.81.1/24).
I have performed 2 balances, and each time I lose access to my ESXi hosts (they say "Not responding") and my only fix is to shut down and restart the NAS. I do wait until the balance is complete to do a shutdown, but I still cannot get access to my ESXi hosts after the balance is complete.
When I turn the ReadyNAS back on, all is well.
During the time the balance starts and when complete, and I loose access to ESXi hosts, the VM's on the EMC SAN are still running and I can RDP into them. I also get alerts of high access reads and writes to the datastores in the EMC SAN.
The VM's running on the Readnas, I can ping them...but I cannot RDP into them (until I reboot the ReadyNAS).
I am assuming the balance may be saturating the wrong network with iScsi traffic, but I wanted to see if anyone else has any issues when running a balance?
I am assuming the balance may be saturating the wrong network with iScsi traffic, but I wanted to see if anyone else has any issues when running a balance?
The BTRFS balance won't saturate any network interface, but it is stressful for the volume, so it may increase read and write latency, which maybe leads to issues. You said you lose access to ESXi hosts and that the RR4312 hosts datastore(s) and SMB shares. I'm not sure why you would lose access to the ESXi hosts while still reaching VMs, I would understand why some VMs would hang, but hosts? Are you running a nested environment? I don't understand why a balance on a storage device would cut you off from the hosts while you can still reach some VMs running on it.
Can you download the logs of the RR4312 and post here an extract of btrfs.log?
I am guessing at this too, since the ReadyNAS is the only new thing added to my network...when I had my support ticket with VMware the only thing I did to bring back my ESXi hosts....was turn off the ReadyNAS. A few days later I did a "Balance" again.....with same resutls...In vCenter the ESXi hosts stated "not responding"...I could not log into the hosts of each ESXi server. I again shut off the ReadyNAS and all came back online.
Well My Scheduled Defrag (Aug 10th) and Balance (Aug 16th) happened.
Datasore Read Latency issues, Host disk SCSI aborts, the ESXi Hosts "not responding" in vCenter.
I restart the NAS...everything is corrected.
One thing i noticed, all the alerts from NAS came in at once...even from a week ago. Defragmentation started, Defragmentation Complete, Balance Started, Balance Complete, and even the "system is rebooting" message. All alerts came together, right after the NAS has been restarted. I see a new update (6.8.0) came out, maybe this will fix my "werid" issue.
