[rt-users] RT and Disaster Recovery - problem

[Guadagnino Cristiano]

Hi Aaron,
and thank you for the quick reply.


 > What OS/distro are you running?
Centos 6.7

 > Are you using Apache, Nginx or something else to serve up RT?
Apache/2.2.15 (CentOS) Server at localhost Port 80

 > Have you checked that DNS is resolving properly on your machine?
Yes, DNS is warking properly and very fast. However, on my test VMs I
have used only IPs to avoid putting the DNS into the equation.

 > Are commands you run from the shell taking a long time to run, or is
it just RT?
Apparently it is just RT


Thank you!
Cris


Cristiano Guadagnino

Servizio Sistemi Dipartimentali, Periferici e DB
_______________________________
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guadagnino.cristiano at creval.it
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-----Messaggio originale-----
Da: Aaron C. de Bruyn <aaron at heyaaron.com>
Inviato: Wed Sep 02 2015 17:26:02 GMT+0200 (CEST)
A: Guadagnino Cristiano <guadagnino.cristiano at creval.it>
Cc: "rt-users at lists.bestpractical.com" <rt-users at lists.bestpractical.com>
Oggetto: Re: [rt-users] RT and Disaster Recovery - problem

> I have not run into the issue, but we can try and figure out where the
> slowness is coming from.
>
> What OS/distro are you running?
>
> Are you using Apache, Nginx or something else to serve up RT?
>
> Have you checked that DNS is resolving properly on your machine?
> (type: host google.com and see how long it takes for an answer)
>
> Are commands you run from the shell taking a long time to run, or is it just RT?
>
> -A
>
>
> On Wed, Sep 2, 2015 at 8:11 AM, Guadagnino Cristiano
> <guadagnino.cristiano at creval.it> wrote:
>> Hi all,
>> are you using some kind of DR solution with RT?
>>
>> Our RT servers are virtualized on VMware. As a DR solution, we keep
>> virtual machines on our second datacenter in sync with the first one.
>> VMs on the second data center are switched off.
>>
>> If we have problems on the first data center, we power on the VMs on the
>> second and then change our DNS to point to the new VMs.
>> The only difference on the mirrored VMs is that thay have different IPs.
>>
>> So, right after powering them up, we have to connect and change the
>> configuration of those VMs to use the new IPs (at least in those cases
>> where we cannot use DNS aliases).
>>
>> This is acceptable for us, because RT is not such a critical asset that
>> we cannot afford a downtime of a few minutes.
>>
>> However, the problem is that - after reconfiguring the VMs - RT becomes
>> slow as a snail (tens of seconds for each page change/refresh).
>>
>> I lost a couple of days building an exact copy of our production VMs and
>> experimenting with varying IPs and reconfiguring, and I am not able to
>> overcome the problem, nor understand where it comes from.
>>
>> Has anybody ever heard of such a problem?
>>
>> T.I.A.
>> Cris
>

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