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<div class="moz-cite-prefix">On 06/08/2016 11:19 AM, Anantha Raghava
wrote:<br>
</div>
<blockquote cite="mid:57583774.5050604@exzatechconsulting.com"
type="cite">
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<font face="Liberation Serif">Hi,<br>
<br>
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.<br>
<br>
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.<br>
</font><br>
<font face="Liberation Serif">But if I enable old server and
connect, every thing works quickly.<br>
<br>
Note:<br>
<br>
1. We do not have DNS in our environment.<br>
2. Engine name & even the IP is retained the same.<br>
3. Before migration, we stopped ovirt-engine on old server, took
the backup, shutdown & disconnected the old server.<br>
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.<br>
<br>
Result is terribly slow Web Console.<br>
<br>
First, we attempted to setup ovirt-reports and later removed it
thinking that may be slowing down the engine server. Yet the
same result.<br>
<br>
Commands used to backup from old server: </font><font
face="Liberation Serif">
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"engine-backup --mode=backup --file=<filename>
--log=<log file name> --provision-db"<br>
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"<br>
<br>
The command executed without any errors, resulting in a terribly
slow web console.<br>
<br>
Note: Without --restore-permissions, the restore fails. Did not
understand what to give as restore permissions. Hence used
--no-restore-permissions.<br>
<br>
<b>Hardware configuration:</b><br>
<b><br>
</b><b>Old Server:</b> i3 Processor, 4 GB Memory, 1 Gbps NIC<br>
<b>New Server :</b> Lenovo x3250 M5 Server with Intel Xeon
Processor, 16 GB RAM, 2 X 1 Gbps NIC.<br>
<br>
Just unable to understand why it is terribly slow.<br>
</font>
<div class="moz-signature"> </div>
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<br>
What version of oVirt are you running. Before 3.6.5 there was an
issue because of the generation of random numbers. Many hosts and
VMs don't have much mouse and keyboard activity so it takes forever
to generate the entropy needed for the connection process. I was
told to check the entropy level with <br>
<br>
<pre wrap="">cat /proc/sys/kernel/random/entropy_avail
I installed haveged and that fixed it but I'm now on 3.6.5.
</pre>
<br>
<blockquote cite="mid:57583774.5050604@exzatechconsulting.com"
type="cite">
<div class="moz-signature">
<p>-- </p>
<p style="margin-bottom: 0cm; line-height: 100%"><font
face="Times New Roman, serif"><font face="Times New Roman,
serif">T</font>hanks
& Regards,</font></p>
<address style="line-height: 100%"><font face="Times New Roman,
serif">Anantha Raghava</font></address>
<br>
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</pre>
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