Failback funktionality in Failover Cluster 2012

-

how failback working in 2012? utilise quick- or live migration features or turning vms off , moving them in earler versions?

failback uses quick migration.  not turn off, move, , restart.  activity of vm , amount of memory in use vm determines time vm unavailable use.  quick migration faster turning off , restarting.

this 1 of reasons rarely, if ever, use failback.  reason should in situation failback comes play when bad happened in first place causing vm fail on (restart) on surviving node.  if uptime critical, makes more sense ensure condition caused failure has been diagnosed , remedied before moving failed resource.  once have determined that, can live migrate resource ensuring no outage. 

with failback, possible end 'ping-pong' effect.  fails on node1 causing vm restart on node2.  failure transient on node1 , automatically 'corrects' itself.  failback causes vm running on node2 quick migrate node1.  load on node1 again, resource fails again, causing restart of vm on node2.  , loop continues.

.:|:.:|:. tim



Windows Server  >  High Availability (Clustering)



Comments

Post a Comment

Popular posts from this blog

WIMMount (HSM) causing cluster storage to go redirected (2012r2 DC)

-
looking options resolve error , prevent in future. thanks help. hardware: 2 node dell hv cluster running2012r2 dc 8 nic/ea in multiplex mode 4x hyper-v 4x hosts storage: 2x synology nas, accessed through iscsi hosts , cluster relevant logs: log name:      microsoft-windows-failoverclustering/diagnostic source:        microsoft-windows-failoverclustering date:          event id:      2050 task category: none level:         warning keywords:       user:          system computer:      l description: [dcm] filter wimmount found @ unsafe altitude 180700 log name:      system source:        microsoft-windows-failoverclustering ...
Read more

Failed to delete the test record dcdiag-test-record in zone test.com

-
ps c:\users\administrator.test> dcdiag /test:dns directory server diagnosis performing initial setup:    trying find home server...    home server = dc02    * identified ad forest.    done gathering initial info. doing initial required tests    testing server: default-first-site-name\dc02       starting test: connectivity          ......................... dc02 passed test connectivity doing primary tests    testing server: default-first-site-name\dc02       starting test: dns          dns tests running , not hung. please wait few minutes...          ......................... dc02 passed test dns    running partition tests on : forestdnszones    running partition tests on : domaindnszones    running partition tests on : schema ...
Read more

Azure MFA with Azure AD and RDS

-
i have setup following lab in azure , need help. a server (domain controller) , remote desktop services. and server multi factor authentication server. i have setup following one http://www.rdsgurus.com/uncategorized/step-by-step-using-windows-server-2012-r2-rd-gateway-with-azure-multifactor-authentication/ and when im connecting got following error. the user "domain\username", on client computer "xxx.xxx.xxx.xxx", did not meet connection authorization policy requirements , therefore not authorized access rd gateway server. authentication method used was: "ntlm" , connection protocol used: "rpc-http". following error occurred: "23003". also on security log i've got following authentication details: connection request policy name: ts gateway authorization policy network policy name: - authentication provider: radius proxy authentication server: test.test.local authenticati...
Read more