Re: [ovirt-users] Terribly slow web consile post migration of oVirt Engine from one host to another host

Hello Alexander, You are right. The FQDN was the culprit. Once I entered the FQDN in /etc/hosts file, the problem got resolved. Thanks for your guidance. By the way any document that explains what is --restore-permissions in engine-backup process?

> Hi, > > I will try both options tomorrow & revert back here. > > Regards, > Anantha Raghava > > On Jun 8, 2016 10:04 PM, "Alexander Wels" <awels(a)redhat.com > > <mailto:awels@redhat.com>> wrote: > On Wednesday, June 08, 2016 08:49:16 PM Anantha Raghava wrote: > > Hi, > > > > I was able to migrate the oVirt Engine from one host to another > > using > > > engine-backup utility. On the new host, the data is loaded > > properly but > > > the Administration Portal is terribly slow. > > > > It take about 2 to 3 minutes to allow me to enter user name & > > password. > > > Once logged in, it takes hell a lot of time to show up the data. > > Click > > > on a tab, we need to wait for a good amount of time to see the > > actual > > > data. Even the refresh is taking time to execute although it is > > set to 5 > > > Seconds. > > > > But if I enable old server and connect, every thing works quickly. > > > > Note: > > > > 1. We do not have DNS in our environment. > > 2. Engine name & even the IP is retained the same. > > 3. Before migration, we stopped ovirt-engine on old server, took the > > backup, shutdown & disconnected the old server. > > 4. We installed the ovirt-engine on new server, run engine > > setup, noted > > > down the DB password, did engine-cleanup, restored the data using > > engine-backup utility and executed engine-setup again. It did > > recognize > > > restored data and only httpd configuration was sought and we > > selected > > > the defaults. > > It is highly likely 1 of 2 things: > > 1. The entropy mentioned by Brett, however that is mostly > applicable on hosted > engine as VMs don't usually have good entropy. > 2. The engine cannot resolve itself (which looking at your > description is the > likely culprit). Since you don't have DNS, you need to add the fqdn to > /etc/hosts so it can resolve itself. > > > Result is terribly slow Web Console. > > > > First, we attempted to setup ovirt-reports and later removed it > > thinking > > > that may be slowing down the engine server. Yet the same result. > > > > Commands used to backup from old server: "engine-backup > > --mode=backup > > > --file=<filename> --log=<log file name> --provision-db" > > Command used to restore on new server: "engine-backup --mode=restore > > --file=<backup-file-name> --log=<log-file-name> > > --change-db-credentials > > > --db-host=localhost --db-user=engine --db-name=engine > > --db-password=<password noted down in step 4> > > --no-restore-permissions" > > > The command executed without any errors, resulting in a terribly > > slow > > > web console. > > > > Note: Without --restore-permissions, the restore fails. Did not > > understand what to give as restore permissions. Hence used > > --no-restore-permissions. > > > > *Hardware configuration:* > > * > > **Old Server:* i3 Processor, 4 GB Memory, 1 Gbps NIC > > *New Server :* Lenovo x3250 M5 Server with Intel Xeon Processor, > > 16 GB > > > RAM, 2 X 1 Gbps NIC. > > > > Just unable to understand why it is terribly slow.