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From "JR John Roach (5298)" <>
Subject Re: [!!Mass Mail]Re: Regarding replicated DB store solutions
Date Thu, 08 Dec 2016 14:26:37 GMT
Thank you for that information it cleared up a lot of things,

I was a little hesitant on implementing Artemis in a production

Have an awesome day!


-----Original Message-----
From: Christopher Shannon <>
Reply-To: "" <>
Date: Wednesday, December 7, 2016 at 3:29 PM
To: "" <>
Subject: [!!Mass Mail]Re: Regarding replicated DB store solutions

>You probably figured this out but to be clear in my previous message in
>first paragraph I meant to say that LevelDB was "intended to be the follow
>on to KahaDB", and not "was intended to be the follow on to ActiveMQ" as
>currently states.
>On Wed, Dec 7, 2016 at 3:26 PM, Christopher Shannon <
>> wrote:
>> The issue with the current LevelDB implementation is that it is not
>> stable.  There have been numerous bugs reported against it that have not
>> been fixed including corruption problems so it is not really usable in a
>> production environment. Originally it was intended to be the follow on
>> ActiveMQ but it has basically been abandoned as there hasn't been anyone
>> who has shown any interest the past couple of years to fix it up so it
>> been deprecated.
>> The link you have found is old as originally replication support was
>> planned for KahaDB but that was migrated to LevelDB instead and KahaDB
>> not currently have replication.  However if you are ok with a shared
>> system solution for high availability then you can use KahaDB.
>> .
>> If you are interested in replication support I would take a look at
>> Artemis (, which you alluded to by
>> mentioning the ActiveMQ sibling project.  Artemis supports replication
>> is currently under heavy development with the goal to ultimately have it
>> replace the current 5.x broker if/when the community decides it is
>> So I would give it a shot and see if it works for you if you need a
>> replication.  I doubt that there will ever be replication added to
>> as most of the active development is going towards Artemis at this
>> On Mon, Dec 5, 2016 at 10:15 AM, JR John Roach (5298) <>
>> wrote:
>>> Hi,
>>> We need a high availability solution. To this extent I did some
>>> on the usage of ActiveMQ.
>>> According to this documentation (
>>> plicated-leveldb-store.html) LevelDB store is no longer supported.
>>> Wasn¹t LevelDB newer DB solution? Wasn¹t it going to replace KahaDB?
>>> According to this documentation (
>>> hadb-master-slave.html) KahaDB replication is not currently supported.
>>> Will it ever be? Also it looks like the documentation is broken, could
>>> be fixed?
>>> If replicated DB is not supported what is the supported high
>>> solution that ActiveMQ has that can;
>>>   *   Support multiple slaves
>>>   *   Replication of queues
>>> ?
>>> Could the ActiveMQ sibling be the solution?
>>> Thank you for any information you can provide.

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