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

2016-06-09 Thread Anantha Raghava

Hello Nicholas,

We are using bare-metal server with CentOS 7 OS and oVirt version is 
3.6.6 GA.


--

Thanks & Regards,

Anantha Raghava


On Thursday 09 June 2016 06:41 PM, Nicolas Ecarnot wrote:

Le 09/06/2016 08:58, Anantha Raghava a écrit :

Hello Alexander,

You are right. The FQDN was the culprit. Once I entered the FQDN in
/etc/hosts file, the problem got resolved.


Hello,

I have not understood clearly whether your were using hosted engine or 
bare-metal?


I'm asking that because - as Alex knows it - I'm facing this terribly 
slowness since months, and we took a lot a time trying to figure it 
out, to no avail.

We're using 3.6.5 and bare-metal engine.
I triple checked DNS resolution, added (anyway) relevant fqdn in 
/etc/hosts, install (anyway) haveged and rebooted.

We checked all that with Alex, but seeing nothing obvious.

So far, the web gui usage is still a real daily pain.



___
Users mailing list
Users@ovirt.org
http://lists.ovirt.org/mailman/listinfo/users


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

2016-06-09 Thread Anantha Raghava

Hi,

We need to understand Postgress backup & restore process to understand 
these properly. Not having such an expertise with Postgress.


Any way, interesting discussions..worth spending time to understand it 
properly. That answers many questions


--

Thanks & Regards,

Anantha Raghava


On Thursday 09 June 2016 06:41 PM, Yedidyah Bar David wrote:

On Thu, Jun 9, 2016 at 3:33 PM, Anantha Raghava
 wrote:

Hi,

Thanks for taking time and reverting back to me.

I have seen this explanation from engine-backup help and realise that it is
something to do with Postgres DB restore activity. But not much said about
it. I feel it instructs Postgress DB to restore the DB without privileges
with which the object was created, but use new permissions & privileges
passed along with --change-db-credentials and others passed during
engine-backup --mode=restore.

Exactly.

And if you do not pass --change-db-credentials, you'll simply get the
default, which is to just give permissions to the user creating the
schema.

Bottom line: If you used only defaults, and did not create users
and give them grants, there is no difference between the options.
They'll create the exact same database. If you did add grants, you
must choose.

I agree it's not very user-friendly to require choice, but please
take into consideration that if you had a large setup (say hundreds
of VMs or more) with dwh history included over some time, you'll have
a large database, and I think it will be much less friendly if we
"just try" restoring (which can take several hours then) and fail
in the end due to missing users.

Please also see the discussion on these bugs for more details:

https://bugzilla.redhat.com/show_bug.cgi?id=1217402
https://bugzilla.redhat.com/show_bug.cgi?id=1220791

Best,


However not sure.

--

Thanks & Regards,

Anantha Raghava
On Thursday 09 June 2016 05:47 PM, Alexander Wels wrote:

On Thursday, June 09, 2016 12:28:41 PM Anantha Raghava wrote:

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?

If you type engine-backup --help you will get a list and explanation of all
the possible options.

Affects only the custom dump format. Will not pass to pg_restore '--no-owner
--
no-privileges'. Might not work as expected with the --*db-user options.

Is what the --help says, not sure what that means though.

Hi,

I will try both options tomorrow & revert back here.

Regards,
Anantha Raghava

On Jun 8, 2016 10:04 PM, "Alexander Wels" mailto:aw...@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= --log= --provision-db"
 > Command used to restore on new server: "engine-backup --mode=restore
 > --file= --log=

 --change-db-credentials

 > --db-host=localhost --db-user=engine --db-name=engine
 > --db-password=


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

2016-06-09 Thread Alexander Wels
On Thursday, June 09, 2016 03:47:17 PM Nicolas Ecarnot wrote:
> Le 09/06/2016 15:31, Alexander Wels a écrit :
> > On Thursday, June 09, 2016 03:11:07 PM Nicolas Ecarnot wrote:
> >> Le 09/06/2016 08:58, Anantha Raghava a écrit :
> >>> Hello Alexander,
> >>> 
> >>> You are right. The FQDN was the culprit. Once I entered the FQDN in
> >>> /etc/hosts file, the problem got resolved.
> >> 
> >> Hello,
> >> 
> >> I have not understood clearly whether your were using hosted engine or
> >> bare-metal?
> >> 
> >> I'm asking that because - as Alex knows it - I'm facing this terribly
> >> slowness since months, and we took a lot a time trying to figure it out,
> >> to no avail.
> >> We're using 3.6.5 and bare-metal engine.
> >> I triple checked DNS resolution, added (anyway) relevant fqdn in
> >> /etc/hosts, install (anyway) haveged and rebooted.
> >> We checked all that with Alex, but seeing nothing obvious.
> >> 
> >> So far, the web gui usage is still a real daily pain.
> > 
> > And we verified the ping between your browser machine and the engine was
> > low. The load on the engine was near 0. That your browser was either
> > Chrome/FF and that the machine running the browser is plenty powerful.
> > 
> > Did you ever disable the repos besides the 3.6 one and run a yum update
> > (on
> > the engine)?
> 
> Yes, I did.
> Two DC are still running on 3.6.3, and four others are running on 3.6.5.
> Amongst the 3.6.5, some were updated from below, and some were installed
> from scratch (so no negative legacy nor prehistoric RPMs or repos).
> 
> > Greg one of the other maintainers recently did some performance
> > improvements, I just don't remember which version they go into. either
> > 3.6.5 or 3.6.6.
> 
> May you Cc: to Greg?
> 

I asked him, he said 3.6.5 and 4.0. So if your 3.6.5 is the same then it 
didn't solve your issue obviously. I am completely out of things to try or see 
that could possibly be the problem.

> > If I remember correctly for some reason it takes a long time to get
> > data from the engine to your browser, we just don't know why it takes so
> > long as we profiled the engine running in your environment and that was
> > all fine as well.
> 
> I recall correctly.
> 
> I'm also witnessing memory leaks, that I think were fixed recently.

___
Users mailing list
Users@ovirt.org
http://lists.ovirt.org/mailman/listinfo/users


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

2016-06-09 Thread Nicolas Ecarnot

Le 09/06/2016 15:31, Alexander Wels a écrit :

On Thursday, June 09, 2016 03:11:07 PM Nicolas Ecarnot wrote:

Le 09/06/2016 08:58, Anantha Raghava a écrit :

Hello Alexander,

You are right. The FQDN was the culprit. Once I entered the FQDN in
/etc/hosts file, the problem got resolved.


Hello,

I have not understood clearly whether your were using hosted engine or
bare-metal?

I'm asking that because - as Alex knows it - I'm facing this terribly
slowness since months, and we took a lot a time trying to figure it out,
to no avail.
We're using 3.6.5 and bare-metal engine.
I triple checked DNS resolution, added (anyway) relevant fqdn in
/etc/hosts, install (anyway) haveged and rebooted.
We checked all that with Alex, but seeing nothing obvious.

So far, the web gui usage is still a real daily pain.


And we verified the ping between your browser machine and the engine was low.
The load on the engine was near 0. That your browser was either Chrome/FF and
that the machine running the browser is plenty powerful.

Did you ever disable the repos besides the 3.6 one and run a yum update (on
the engine)?


Yes, I did.
Two DC are still running on 3.6.3, and four others are running on 3.6.5.
Amongst the 3.6.5, some were updated from below, and some were installed 
from scratch (so no negative legacy nor prehistoric RPMs or repos).



Greg one of the other maintainers recently did some performance
improvements, I just don't remember which version they go into. either 3.6.5
or 3.6.6.


May you Cc: to Greg?


If I remember correctly for some reason it takes a long time to get
data from the engine to your browser, we just don't know why it takes so long
as we profiled the engine running in your environment and that was all fine as
well.


I recall correctly.

I'm also witnessing memory leaks, that I think were fixed recently.

--
Nicolas ECARNOT
___
Users mailing list
Users@ovirt.org
http://lists.ovirt.org/mailman/listinfo/users


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

2016-06-09 Thread Alexander Wels
On Thursday, June 09, 2016 03:11:07 PM Nicolas Ecarnot wrote:
> Le 09/06/2016 08:58, Anantha Raghava a écrit :
> > Hello Alexander,
> > 
> > You are right. The FQDN was the culprit. Once I entered the FQDN in
> > /etc/hosts file, the problem got resolved.
> 
> Hello,
> 
> I have not understood clearly whether your were using hosted engine or
> bare-metal?
> 
> I'm asking that because - as Alex knows it - I'm facing this terribly
> slowness since months, and we took a lot a time trying to figure it out,
> to no avail.
> We're using 3.6.5 and bare-metal engine.
> I triple checked DNS resolution, added (anyway) relevant fqdn in
> /etc/hosts, install (anyway) haveged and rebooted.
> We checked all that with Alex, but seeing nothing obvious.
> 
> So far, the web gui usage is still a real daily pain.

And we verified the ping between your browser machine and the engine was low. 
The load on the engine was near 0. That your browser was either Chrome/FF and 
that the machine running the browser is plenty powerful. 

Did you ever disable the repos besides the 3.6 one and run a yum update (on 
the engine)? Greg one of the other maintainers recently did some performance 
improvements, I just don't remember which version they go into. either 3.6.5 
or 3.6.6. If I remember correctly for some reason it takes a long time to get 
data from the engine to your browser, we just don't know why it takes so long 
as we profiled the engine running in your environment and that was all fine as 
well. 
___
Users mailing list
Users@ovirt.org
http://lists.ovirt.org/mailman/listinfo/users


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

2016-06-09 Thread Yedidyah Bar David
On Thu, Jun 9, 2016 at 3:33 PM, Anantha Raghava
 wrote:
> Hi,
>
> Thanks for taking time and reverting back to me.
>
> I have seen this explanation from engine-backup help and realise that it is
> something to do with Postgres DB restore activity. But not much said about
> it. I feel it instructs Postgress DB to restore the DB without privileges
> with which the object was created, but use new permissions & privileges
> passed along with --change-db-credentials and others passed during
> engine-backup --mode=restore.

Exactly.

And if you do not pass --change-db-credentials, you'll simply get the
default, which is to just give permissions to the user creating the
schema.

Bottom line: If you used only defaults, and did not create users
and give them grants, there is no difference between the options.
They'll create the exact same database. If you did add grants, you
must choose.

I agree it's not very user-friendly to require choice, but please
take into consideration that if you had a large setup (say hundreds
of VMs or more) with dwh history included over some time, you'll have
a large database, and I think it will be much less friendly if we
"just try" restoring (which can take several hours then) and fail
in the end due to missing users.

Please also see the discussion on these bugs for more details:

https://bugzilla.redhat.com/show_bug.cgi?id=1217402
https://bugzilla.redhat.com/show_bug.cgi?id=1220791

Best,

>
> However not sure.
>
> --
>
> Thanks & Regards,
>
> Anantha Raghava
> On Thursday 09 June 2016 05:47 PM, Alexander Wels wrote:
>
> On Thursday, June 09, 2016 12:28:41 PM Anantha Raghava wrote:
>
> 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?
>
> If you type engine-backup --help you will get a list and explanation of all
> the possible options.
>
> Affects only the custom dump format. Will not pass to pg_restore '--no-owner
> --
> no-privileges'. Might not work as expected with the --*db-user options.
>
> Is what the --help says, not sure what that means though.
>
> Hi,
>
> I will try both options tomorrow & revert back here.
>
> Regards,
> Anantha Raghava
>
> On Jun 8, 2016 10:04 PM, "Alexander Wels" 
> > 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= --log= --provision-db"
> > Command used to restore on new server: "engine-backup --mode=restore
> > --file= --log=
>
> --change-db-credentials
>
> > --db-host=localhost --db-user=engine --db-name=engine
> > --db-password=
>
> --no-restore-permissions"
>
> > The command executed without any errors, resulting in a terribly
>
> slow
>
> > web console.
> >
> > Note: Without --restore-permissions, 

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

2016-06-09 Thread Nicolas Ecarnot

Le 09/06/2016 08:58, Anantha Raghava a écrit :

Hello Alexander,

You are right. The FQDN was the culprit. Once I entered the FQDN in
/etc/hosts file, the problem got resolved.


Hello,

I have not understood clearly whether your were using hosted engine or 
bare-metal?


I'm asking that because - as Alex knows it - I'm facing this terribly 
slowness since months, and we took a lot a time trying to figure it out, 
to no avail.

We're using 3.6.5 and bare-metal engine.
I triple checked DNS resolution, added (anyway) relevant fqdn in 
/etc/hosts, install (anyway) haveged and rebooted.

We checked all that with Alex, but seeing nothing obvious.

So far, the web gui usage is still a real daily pain.

--
Nicolas ECARNOT
___
Users mailing list
Users@ovirt.org
http://lists.ovirt.org/mailman/listinfo/users


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

2016-06-09 Thread Anantha Raghava

Hi,

Thanks for taking time and reverting back to me.

I have seen this explanation from engine-backup help and realise that it 
is something to do with Postgres DB restore activity. But not much said 
about it. I feel it instructs Postgress DB to restore the DB without 
privileges with which the object was created, but use new permissions & 
privileges passed along with --change-db-credentials and others passed 
during engine-backup --mode=restore.


However not sure.

--

Thanks & Regards,

Anantha Raghava


On Thursday 09 June 2016 05:47 PM, Alexander Wels wrote:

On Thursday, June 09, 2016 12:28:41 PM Anantha Raghava wrote:

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?


If you type engine-backup --help you will get a list and explanation of all
the possible options.

Affects only the custom dump format. Will not pass to pg_restore '--no-owner --
no-privileges'. Might not work as expected with the --*db-user options.

Is what the --help says, not sure what that means though.


Hi,

I will try both options tomorrow & revert back here.

Regards,
Anantha Raghava

On Jun 8, 2016 10:04 PM, "Alexander Wels" mailto:aw...@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= --log= --provision-db"

 > Command used to restore on new server: "engine-backup --mode=restore
 > --file= --log=
 
 --change-db-credentials
 
 > --db-host=localhost --db-user=engine --db-name=engine

 > --db-password=
 
 --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.


___
Users mailing list
Users@ovirt.org
http://lists.ovirt.org/mailman/listinfo/users


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

2016-06-09 Thread Alexander Wels
On Thursday, June 09, 2016 12:28:41 PM Anantha Raghava wrote:
> 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?
> 

If you type engine-backup --help you will get a list and explanation of all 
the possible options. 

Affects only the custom dump format. Will not pass to pg_restore '--no-owner --
no-privileges'. Might not work as expected with the --*db-user options.

Is what the --help says, not sure what that means though.

> > Hi,
> > 
> > I will try both options tomorrow & revert back here.
> > 
> > Regards,
> > Anantha Raghava
> > 
> > On Jun 8, 2016 10:04 PM, "Alexander Wels"  > 
> > > 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= --log= --provision-db"
> > > Command used to restore on new server: "engine-backup --mode=restore
> > > --file= --log=
> > 
> > --change-db-credentials
> > 
> > > --db-host=localhost --db-user=engine --db-name=engine
> > > --db-password=
> > 
> > --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.

___
Users mailing list
Users@ovirt.org
http://lists.ovirt.org/mailman/listinfo/users


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

2016-06-08 Thread Anantha Raghava

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?


--

Thanks & Regards,

Anantha Raghava


On Wednesday 08 June 2016 10:28 PM, Anantha Raghava wrote:


Hi,

I will try both options tomorrow & revert back here.

Regards,
Anantha Raghava

On Jun 8, 2016 10:04 PM, "Alexander Wels" > 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= --log= --provision-db"
> Command used to restore on new server: "engine-backup --mode=restore
> --file= --log=
--change-db-credentials
> --db-host=localhost --db-user=engine --db-name=engine
> --db-password=
--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.



___
Users mailing list
Users@ovirt.org
http://lists.ovirt.org/mailman/listinfo/users


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

2016-06-08 Thread Robert Story
On Wed, 8 Jun 2016 12:15:20 -0400 Brett wrote:
BIH> > I was able to migrate the oVirt Engine from one host to another using 
BIH> > engine-backup utility. On the new host, the data is loaded properly 
BIH> > but the Administration Portal is terribly slow.
BIH> >
BIH> > It take about 2 to 3 minutes to allow me to enter user name & 
BIH> > password.
BIH> [...]
BIH> What version of oVirt are you running.  Before 3.6.5 there was an issue 
BIH> because of the generation of random numbers.  Many hosts and VMs don't 
BIH> have much mouse and keyboard activity so it  takes forever to generate 
BIH> the entropy needed for the connection process.  I was told to check the 
BIH> entropy level with
BIH> 
BIH> cat /proc/sys/kernel/random/entropy_avail
BIH> 
BIH> I installed haveged and that fixed it but I'm now on 3.6.5.

I was having this issue on 3.5.x and thought it was because I didn't have
enough memory. Checked my entropy, and it was less than 200. Installed
haveged on my hosted-engine, and now entropy is over 2000 and it takes less
than 10 seconds to log in. Thank you!


Robert

-- 
Senior Software Engineer @ Parsons


pgpscOnYhcThr.pgp
Description: OpenPGP digital signature
___
Users mailing list
Users@ovirt.org
http://lists.ovirt.org/mailman/listinfo/users


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

2016-06-08 Thread Anantha Raghava
Hi,

I will try both options tomorrow & revert back here.

Regards,
Anantha Raghava
On Jun 8, 2016 10:04 PM, "Alexander Wels"  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= --log= --provision-db"
> > Command used to restore on new server: "engine-backup --mode=restore
> > --file= --log= --change-db-credentials
> > --db-host=localhost --db-user=engine --db-name=engine
> > --db-password= --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.
>
>
___
Users mailing list
Users@ovirt.org
http://lists.ovirt.org/mailman/listinfo/users


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

2016-06-08 Thread Alexander Wels
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= --log= --provision-db"
> Command used to restore on new server: "engine-backup --mode=restore
> --file= --log= --change-db-credentials
> --db-host=localhost --db-user=engine --db-name=engine
> --db-password= --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.

___
Users mailing list
Users@ovirt.org
http://lists.ovirt.org/mailman/listinfo/users


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

2016-06-08 Thread Brett I. Holcomb



On 06/08/2016 11:19 AM, 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.


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= --log= --provision-db"
Command used to restore on new server: "engine-backup --mode=restore 
--file= --log= 
--change-db-credentials --db-host=localhost --db-user=engine 
--db-name=engine --db-password= 
--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.


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


cat /proc/sys/kernel/random/entropy_avail

I installed haveged and that fixed it but I'm now on 3.6.5.



--

Thanks & Regards,

Anantha Raghava




___
Users mailing list
Users@ovirt.org
http://lists.ovirt.org/mailman/listinfo/users


___
Users mailing list
Users@ovirt.org
http://lists.ovirt.org/mailman/listinfo/users


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

2016-06-08 Thread Anantha Raghava

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.


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= --log= --provision-db"
Command used to restore on new server: "engine-backup --mode=restore 
--file= --log= --change-db-credentials 
--db-host=localhost --db-user=engine --db-name=engine 
--db-password= --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.

--

Thanks & Regards,

Anantha Raghava


___
Users mailing list
Users@ovirt.org
http://lists.ovirt.org/mailman/listinfo/users