I'll wait for Houston to clarify what he meant with his suggestion. My
interpretation of that was that we default to cloud mode i.e. users get
more OTB features but also we're almost nudging them in that direction.
We could default to "-c" without having to explicitly type it out, and have
a warning at startup but of course, we're assuming that they'd read those
warnings and startup messages.
1. Default to -c, and
2. Make one of the following mandatory
i. -z for external zk
ii. an option to start solr in dev mode (embedded zk), so we also
highlight that it is a non-production ready mode that's meant to make the
getting started experience better.
iii. -standalone (or something else) that explicitly says they want to
run w/o ZK, in which case print out a warning that highlights the lack of
the distributed features in that mode.
On Mon, May 24, 2021 at 12:52 PM Chris Hostetter <[email protected]>
wrote:
>
> : Clearly this won't be done in 8.x. I think it would be ok to make the
> : switch in Solr 9, but maybe it's something we aim for Solr 10 instead. In
> : the meantime we should probably include a backwards-compatible standalone
> : flag (-l/-standalone) that will start to be used once the default mode is
> : switched.
>
> It's not clear to me what exactly you are suggesting the new "default"
> option should do w/regard to ZooKeeper?
>
> Jan's response seems to assume that you are suggesting that the default
> behavior in Solr 9.x shold be equivilent to 8.x's "-c" (w/o a "-z" option)
> so that solr starts an embedded zookeeper ... this seems like a really bad
> idea to me, because it would "normalize" and encourage using the (non
> fault tollerant) embedded zookeeper even more then it already is in 8.x
> ... not to mention that anyone trying to *ACTUALLY* run a (mult-node)
> "solr cluster" will still have to use "-z PORT_FROM_FIRST_SOLR_NODE" ...
> at least right now with the mandatory "-c" option anyone looking for how
> to start up a "cluster" can see the docs for "-c" pointing out hte
> importance of "-z"
>
> On the otherhand: A differnet way of interpreting your suggestion is that
> if we're changing the command line args, and eliminating "-c" (because ow
> it's the default) we can start making "-z" required unless you specifying
> "-standalone" ... or some new "-run-single-point-of-failure-embedded-zk"
> so that solr defaults to cloud mode, but also deaults to failing fast if
> you don't have a zk cluster running (or know that you are doing something
> unsupported in production)
>
> Jan's interpretation of your suggestion scares me, but i could get on
> board the second interpretation of pushing forward cloud mode and trying
> to make people more aware of the importance of a zk cluster.
>
> (W/o more concrete specifics, I'm sure there are other interpretations of
> this suggestion as well, these are just the 2 that immediately popped to
> mind)
>
>
>
> -Hoss
> http://www.lucidworks.com/
>
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--
Anshum Gupta
