topic Re: How long does your VMware MPIO multipathing failover typically take, in seconds? in Array Setup and Networking https://community.hpe.com/t5/array-setup-and-networking/how-long-does-your-vmware-mpio-multipathing-failover-typically/m-p/6983184#M669 <HTML><HEAD></HEAD><BODY><P>Sounds about right.&nbsp;&nbsp; Fantastic!</P></BODY></HTML> Thu, 22 Dec 2016 15:12:38 GMT bear271 2016-12-22T15:12:38Z How long does your VMware MPIO multipathing failover typically take, in seconds? https://community.hpe.com/t5/array-setup-and-networking/how-long-does-your-vmware-mpio-multipathing-failover-typically/m-p/6983182#M667 <HTML><HEAD></HEAD><BODY><P>How long does your VMware MPIO multipathing failover typically take, from the time you e.g. reboot a switch, till the sessions are re-established and the VMs resume?&nbsp;&nbsp; My current configuration (Nimble NCM 3.0, ESXi 6.0, Nexus 3500 switches with recommended configuations) stuns VMs for ~30-40 seconds.&nbsp; I know that this is technically well within VMware's spec to avoid crashing out the VMs, I'm just wondering if other customers get significantly shorter stun times in VMware iSCSI mpio failover scenarios......</P></BODY></HTML> Sun, 09 Oct 2016 01:35:37 GMT https://community.hpe.com/t5/array-setup-and-networking/how-long-does-your-vmware-mpio-multipathing-failover-typically/m-p/6983182#M667 bear271 2016-10-09T01:35:37Z Re: How long does your VMware MPIO multipathing failover typically take, in seconds? https://community.hpe.com/t5/array-setup-and-networking/how-long-does-your-vmware-mpio-multipathing-failover-typically/m-p/6983183#M668 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>The path failover usually takes about 15-20 seconds. This is dependent on recovery_timeout value set with iSCSI adapter(10 seconds: but realistically it takes little longer than this value). If no other alternate paths are available to drive I/O, NMP will hold I/O's for 140 seconds (APD timeout) repeatedly retrying those I/O's. During controller fail-over it takes about 30-40 seconds for alternate controller to take over and resume I/O, depending on the number of volumes.</P><P></P><P>[root@c8-esx5:/opt] esxcli iscsi adapter list</P><P>Adapter&nbsp; Driver&nbsp;&nbsp;&nbsp;&nbsp; State&nbsp;&nbsp; UID&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Description&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </P><P>-------&nbsp; ---------&nbsp; ------&nbsp; ---------------------------------------&nbsp; ----------------------</P><P>vmhba64&nbsp; iscsi_vmk&nbsp; online&nbsp; iqn.1998-01.com.vmware:c8-esx5-3087acb8&nbsp; iSCSI Software Adapter</P><P>[root@c8-esx5:/opt] esxcli iscsi adapter param get -A vmhba64</P><P>Name&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Current&nbsp;&nbsp;&nbsp;&nbsp; Default&nbsp;&nbsp;&nbsp;&nbsp; Min&nbsp; Max&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Settable&nbsp; Inherit</P><P>--------------------&nbsp; ----------&nbsp; ----------&nbsp; ---&nbsp; --------&nbsp; --------&nbsp; -------</P><P>LoginTimeout&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp; 60&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; true&nbsp;&nbsp;&nbsp; false</P><P>LogoutTimeout&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 15&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 15&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0&nbsp;&nbsp;&nbsp; 60&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; false&nbsp;&nbsp;&nbsp; false</P><P>NoopOutInterval&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 15&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 15&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp; 60&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; true&nbsp;&nbsp;&nbsp; false</P><P>NoopOutTimeout&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 10&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 10&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 10&nbsp;&nbsp; 30&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; true&nbsp;&nbsp;&nbsp; false</P><P>RecoveryTimeout&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 10&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 10&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp; 120&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; true&nbsp;&nbsp;&nbsp; false</P></BODY></HTML> Wed, 21 Dec 2016 18:27:53 GMT https://community.hpe.com/t5/array-setup-and-networking/how-long-does-your-vmware-mpio-multipathing-failover-typically/m-p/6983183#M668 skrishna96 2016-12-21T18:27:53Z Re: How long does your VMware MPIO multipathing failover typically take, in seconds? https://community.hpe.com/t5/array-setup-and-networking/how-long-does-your-vmware-mpio-multipathing-failover-typically/m-p/6983184#M669 <HTML><HEAD></HEAD><BODY><P>Sounds about right.&nbsp;&nbsp; Fantastic!</P></BODY></HTML> Thu, 22 Dec 2016 15:12:38 GMT https://community.hpe.com/t5/array-setup-and-networking/how-long-does-your-vmware-mpio-multipathing-failover-typically/m-p/6983184#M669 bear271 2016-12-22T15:12:38Z