[SR-Users] DMQ version compatability
Olle E. Johansson
oej at edvina.net
Sat Mar 19 11:26:55 CET 2022
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.
> On 18 Mar 2022, at 16:56, Alex Balashov <abalashov at evaristesys.com> 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 <bkaufman at bcmone.com> wrote:
>> 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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