Maybe we should include a “version” field in all DMQ messages, like we have a
version for database tables to avoid compatibility issues. If we get a DMQ with
the wrong version compared with the module running’s idea of current DMQ
version for that module, we can just ignore it.
/O
> On 18 Mar 2022, at 16:56, Alex Balashov wrote:
>
> It sounds like this is a broad-based principle about DMQ compatibility that
> is generalised beyond any specific module. Are you looking for an alternate
> set of rules that specially apply to only one module and not to any other
> module, or are you looking for a “de facto” exception that cannot be endorsed
> in principle?
>
> —
> Sent from mobile, with due apologies for brevity and errors.
>
>> On Mar 18, 2022, at 11:52 AM, Ben Kaufman wrote:
>>
>>
>> Daniel,
>>
>> In a recent thread you stated the following regarding DMQ compatibility
>> between versions:
>> “if you do dmq replication between kamailio systems running different major
>> versions, then it is likely to get memory leaks due to replication of data
>> and most probably cannot be fixed. This is because internal structures of
>> modules (also dmq commands) can change, practically what an instance does is
>> not ensured to happen on the other instance. Just for example, from my mind,
>> htable got some changes during past releases, dmq also has significant
>> enhancements by getting support for more transport protocols.”
>>
>> Is it possible to get a bit more clarification on this, particularly as it
>> relates to DMQ_USRLOC? I’m hoping to do rolling updates, but don’t want to
>> end up in a situation where I’ve caused myself more problems than I’ve
>> solved.
>>
>>
>> Ben Kaufman
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