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From Adam Blank <adam.bl...@gmail.com>
Subject Fwd: Configuring SolrCloud with Redundancy on Two Physical Frames
Date Tue, 01 May 2018 16:53:30 GMT
Thanks for your replies, Steph.  Adding back the rest of the mailing list.
If anyone can shed some light on my predicament that would be much
appreciated.

Adam

---------- Forwarded message ----------
From: Steph van Schalkwyk <svanschalkwyk@gmail.com>
Date: Tue, May 1, 2018 at 12:44 PM
Subject: Re: Configuring SolrCloud with Redundancy on Two Physical Frames
To: Adam Blank <adam.blank@gmail.com>


Maybe one of the ZK gurus could chime in? I could test it but I don't have
the time right now.


+1.314.452.2896 (Tel/SMS)

On Tue, May 1, 2018 at 11:42 AM, Adam Blank <adam.blank@gmail.com> wrote:

> I think I would still run into the same issue since if one frame goes down
> I will only have 50% of ZK instances still up, and my understanding is that
> a ZK cluster requires a majority to be up in order to operate. So if I have
> 6 total I'd need 4 to be up.
>
>
> On Tue, May 1, 2018, 12:34 PM Steph van Schalkwyk <svanschalkwyk@gmail.com>
> wrote:
>
>> Only thing I can think of is to run three ZK instances on each hardware
>> instance. That way if one fails you still have three running on the other
>> hardware instance.
>> Also, when you set up the SOLR instances, make sure you're sharding
>> across hardware instances, for example two shards per collection on
>> instance 0 and two on the other.
>> S
>>
>> +1.314.452.2896 (Tel/SMS)
>>
>> On Tue, May 1, 2018 at 10:17 AM, Adam Blank <adam.blank@gmail.com> wrote:
>>
>>> Hi Steph,
>>>
>>> I should have provided some more info.  I am running on AIX.  If I'm
>>> understanding your comment correctly, the issue I'm having isn't with being
>>> able to run multiple ZK instances on a single server.  The issue is with
>>> setting up ZK and SOLR in a way that it can survive either frame failure.
>>> I wonder if setting up a virtual IP for the ZK instances and having SOLR
>>> connect to the VIP would work if all ZK instances share the same data
>>> directory on a shared drive?  I was hoping someone has encountered this
>>> situation before, but if not, I can see if that idea would work.
>>>
>>> Thanks,
>>> Adam
>>>
>>> On Tue, May 1, 2018 at 10:59 AM, Steph van Schalkwyk <
>>> svanschalkwyk@gmail.com> wrote:
>>>
>>>> Adam, is it possible to virtualize in any way?
>>>> As for single physical instances, I have been running three instances
>>>> of ZK
>>>> on one VM quite comfortably. This is only for dev/testing, though.
>>>> Regards
>>>> Steph
>>>>
>>>>
>>>> +1.314.452.2896 (Tel/SMS)
>>>>
>>>> On Tue, May 1, 2018 at 9:55 AM, Adam Blank <adam.blank@gmail.com>
>>>> wrote:
>>>>
>>>> > Hello,
>>>> >
>>>> > I would like to have a high-availability/redundant installation of
>>>> > Zookeeper running in my production environment. The problem is that
I
>>>> only
>>>> > have 2 physical frames available, so that rules out configuring a
>>>> Zookeeper
>>>> > cluster/ensemble since I'd only have redundancy if the frame with the
>>>> > minority of servers goes down. What is the best practice in this
>>>> situation?
>>>> > Is it possible to have a separate standalone install running on each
>>>> frame
>>>> > connected to the same set of SOLR nodes or to use one server as
>>>> primary and
>>>> > one as backup?
>>>> >
>>>> > Thank you,
>>>> > Adam
>>>> >
>>>>
>>>
>>>
>>

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