https://community.hpe.com/t5/storevirtual-storage/configuring-flow-control-for-two-site-configuration/m-p/5288845#M3491 <P>Hi people,</P><P>&nbsp;</P><P>We have a two site Lefthand P4500 cluster, but one of the sites has not been setup for flow control on the storage system managment groups. The cluster is now in production serving 5 vSphere 4.1 ESXi hosts in each site running many virtual machines.</P><P>&nbsp;</P><P>How can we setup flow control so they match each other at each site with minimal downtime.</P><P>&nbsp;</P><P>In the "Servers" - "Volumes and Snapshots" view/tab, can one quarantee that the gateway connections to each volume are 1 to 1 relationship?</P><P>&nbsp;</P><P>i.e. volume 1 &lt;-----&gt; 4000N1</P><P>&nbsp;</P><P>Thanks in advance</P> Tue, 02 Aug 2011 11:45:59 GMT vmcreator 2011-08-02T11:45:59Z https://community.hpe.com/t5/storevirtual-storage/configuring-flow-control-for-two-site-configuration/m-p/5288845#M3491 <P>Hi people,</P><P>&nbsp;</P><P>We have a two site Lefthand P4500 cluster, but one of the sites has not been setup for flow control on the storage system managment groups. The cluster is now in production serving 5 vSphere 4.1 ESXi hosts in each site running many virtual machines.</P><P>&nbsp;</P><P>How can we setup flow control so they match each other at each site with minimal downtime.</P><P>&nbsp;</P><P>In the "Servers" - "Volumes and Snapshots" view/tab, can one quarantee that the gateway connections to each volume are 1 to 1 relationship?</P><P>&nbsp;</P><P>i.e. volume 1 &lt;-----&gt; 4000N1</P><P>&nbsp;</P><P>Thanks in advance</P> Tue, 02 Aug 2011 11:45:59 GMT https://community.hpe.com/t5/storevirtual-storage/configuring-flow-control-for-two-site-configuration/m-p/5288845#M3491 vmcreator 2011-08-02T11:45:59Z https://community.hpe.com/t5/storevirtual-storage/configuring-flow-control-for-two-site-configuration/m-p/5289921#M3496 <P>Downtime depends on how you've set it up. If you have configured two sites and network raid 10 for your volumes, you can take one site offline without any downtime.</P><P>&nbsp;</P><P>About perfomance issues with flow control, this was mentioned in last patch set 4 (release some days ago):</P><UL><LI><P>Large multi-site SAN clusters where Ethernet flow control is not configured now no longer experience degraded performance with SAN/iQ 9.0 because of network flow control issues.</P></LI></UL> Wed, 03 Aug 2011 10:00:06 GMT https://community.hpe.com/t5/storevirtual-storage/configuring-flow-control-for-two-site-configuration/m-p/5289921#M3496 Davy Priem 2011-08-03T10:00:06Z