On Wed, Nov 24, 2021 at 9:05 PM Ishan Chattopadhyaya <
[email protected]> wrote:

>
>
> On Wed, Nov 24, 2021 at 8:19 PM Gus Heck <[email protected]> wrote:
>
>> Left some additional comments in the google doc, extracting the key point
>> for others here so they can know if they want to read the google doc
>> commentary:
>>
>
> I'm addressing them here, inline.
>
>
>> There is presently disagreement with my proposal that the sip specify
>> both how we track configuration (which I have been referring to as
>> "capability") and runtime state ("providing"). I see the primary value of
>> having a role concept as one of organizing the code and configuration in a
>> way that is easy to understand, which is why I'm in favor of this SiP
>> overall.
>>
>
> I purposely don't want to complicate this design by allowing for
> "capability" vs "currently providing" to be represented as first class
> citizens. Besides the OVERSEER role (preferred overseer), I can't think of
> concrete scenarios where such a concept could be applicable, and hence I
> don't want to get ahead of myself in trying to address how to solve that.
> Since the current proposal for dealing with roles is flexible and generic
> enough, I don't think adding such extensions would be a problem. However, I
> don't want to go down that rabbithole at this point in time.
>
>
>
>>
>> If you don't want to tackle implementing the runtime state bit I'm ok
>> with that as long as we have a clear plan in the SIP of how this type of
>> information should be organized in the future.
>> The structure proposed in the SIP for information in zk seems to map more
>> clearly to runtime state than configuration, and seems like it would
>> inhibit a natural representation of such.
>>
>
> The structure proposed allows for role specific configurations (if
> needed). It doesn't provide for node specific configuration in ZK, since
> all node properties should come from either solr.xml or sysprops. At
> present, I don't think we ever have node specific info *configuration* in
> ZK in any part of Solr, and I think we shouldn't go that route here.
>

Correction: "At present, I don't think we ever have node specific
*configuration* in ZK in any part of Solr, and I think we shouldn't go that
route here."


>
>
>>
>> Finally the structure in the SIP for zk information doesn't specify if
>> some of the nodes are ephemeral, and reliable for a "current" list or if
>> they are persistent over time. I feel like we may not yet have a plan for
>> how much information about nodes (n general) should be retained while a
>> node is down, which maybe needs to underlie this design.
>>
>
> All the node names under the roles znodes are ephemeral. Added this to the
> document (confluence and gdoc both).
>
>
>>
>> -Gus
>>
>>
>> On Tue, Nov 23, 2021 at 10:34 PM Ishan Chattopadhyaya <
>> [email protected]> wrote:
>>
>>> I've synced back all changes to confluence. Both represent the same
>>> document as of now.
>>> Please review and suggest if there are any outstanding concerns. Thanks
>>> for all the feedback.
>>>
>>> I wish to proceed with the implementation based on lazy consensus again.
>>>
>>> On Tue, Nov 23, 2021 at 9:38 PM Mike Drob <[email protected]> wrote:
>>>
>>>> I should clarify, that my -1 was specifically about reaching lazy
>>>> consensus and not about that proposal itself.
>>>>
>>>> On Tue, Nov 23, 2021 at 9:42 AM Ishan Chattopadhyaya <
>>>> [email protected]> wrote:
>>>>
>>>>> > -1, I would like to see a proposal on list where it will be
>>>>> permanently available
>>>>>
>>>>> It will be available in the confluence document (as it currently is).
>>>>> The google docs is just for collecting temporary feedback, thanks to easy
>>>>> inline commenting capability. We promised to consolidate feedback in the
>>>>> gdoc and sync back to the SIP document in confluence. This is reasonable
>>>>> enough expectations, and shouldn't be a worry enough for a -1.
>>>>>
>>>>> As of right now, while trying to address some concerns, some edits
>>>>> have been made in gdocs by Noble that we'll sync back into confluence; so
>>>>> that's the only divergence.
>>>>>
>>>>> On Tue, Nov 23, 2021 at 9:09 PM Ishan Chattopadhyaya <
>>>>> [email protected]> wrote:
>>>>>
>>>>>> > -1, I would like to see a proposal on list where it will be
>>>>>> permanently available
>>>>>> > in the archives instead of being directed to a Google doc which can
>>>>>> be edited at any point in time.
>>>>>> > This has been an incredibly difficult proposal to keep track of.
>>>>>>
>>>>>> This entire SIP process has been incredibly difficult to coordinate.
>>>>>> The idea of doing this on a mail thread was a terrible one. There's no
>>>>>> archive available publicly for this list that doesn't break the threading
>>>>>> functionality (I guess someone among us is using some funky mail client
>>>>>> that's messing with Pony Mail). JIRA for discussion would've been much
>>>>>> better. I suppose JIRA used to have threaded discussions once upon a 
>>>>>> time,
>>>>>> that would've been very handy here.
>>>>>>
>>>>>> On Tue, Nov 23, 2021 at 9:07 PM Ishan Chattopadhyaya <
>>>>>> [email protected]> wrote:
>>>>>>
>>>>>>> Okay, sure, I'll rescind my assertion about having reached a lazy
>>>>>>> consensus. I'll work through all the recent comments and feedback.
>>>>>>> I think at the last moment, there was an edit by Noble to the Google
>>>>>>> Doc that hasn't made it into the SIP document, and I'll review that 
>>>>>>> change,
>>>>>>> the recent comments and get back here tomorrow. Other than that last 
>>>>>>> moment
>>>>>>> change, the SIP document is up to date.
>>>>>>>
>>>>>>> On Tue, Nov 23, 2021 at 8:24 PM Gus Heck <[email protected]> wrote:
>>>>>>>
>>>>>>>> Also, I don't know that it's defined anywhere, but I feel that
>>>>>>>> declaring lazy consensus on a SIP in less than a week is rushing 
>>>>>>>> things.
>>>>>>>> Some folks won't have the flexibility to address things daily and I've 
>>>>>>>> been
>>>>>>>> uncomfortably pulled away from paid work trying to keep up with this 
>>>>>>>> as is.
>>>>>>>> Lazy consensus should include at least one weekend (IMHO)
>>>>>>>>
>>>>>>>> On Tue, Nov 23, 2021 at 9:49 AM Gus Heck <[email protected]>
>>>>>>>> wrote:
>>>>>>>>
>>>>>>>>> IMHO two things must happen before lazy consensus wait period can
>>>>>>>>> begin:
>>>>>>>>>   1) The wiki must be updated to reflect the results of discussion
>>>>>>>>> in the google doc.
>>>>>>>>>   2) The fact that the wiki has been updated, and that you think
>>>>>>>>> the discussion is at an end must be posted here, preferably with a 
>>>>>>>>> summary
>>>>>>>>> on the list.
>>>>>>>>>
>>>>>>>>> If it didn't happen on the list it didn't happen.
>>>>>>>>>
>>>>>>>>> Also the google doc has not been notifying me of
>>>>>>>>> changes/responses. So a note here when you've responded and some time 
>>>>>>>>> to
>>>>>>>>> respond before the above steps are taken would be appreciated.
>>>>>>>>>
>>>>>>>>> -Gus
>>>>>>>>>
>>>>>>>>> On Tue, Nov 23, 2021 at 9:40 AM Mike Drob <[email protected]> wrote:
>>>>>>>>>
>>>>>>>>>> -1, I would like to see a proposal on list where it will be
>>>>>>>>>> permanently available in the archives instead of being directed to a 
>>>>>>>>>> Google
>>>>>>>>>> doc which can be edited at any point in time.
>>>>>>>>>>
>>>>>>>>>> This has been an incredibly difficult proposal to keep track of.
>>>>>>>>>>
>>>>>>>>>> Mike
>>>>>>>>>>
>>>>>>>>>> On Tue, Nov 23, 2021 at 6:09 AM Ishan Chattopadhyaya <
>>>>>>>>>> [email protected]> wrote:
>>>>>>>>>>
>>>>>>>>>>> This proposal has passed with lazy consensus. We can proceed to
>>>>>>>>>>> the implementation phase.
>>>>>>>>>>> Thanks to everyone for feedback, esp. Gus for the patience.
>>>>>>>>>>>
>>>>>>>>>>> On Sun, Nov 21, 2021 at 2:24 PM Gus Heck <[email protected]>
>>>>>>>>>>> wrote:
>>>>>>>>>>>
>>>>>>>>>>>> Thanks for adding that :) and Thanks to Nobel for translating
>>>>>>>>>>>> my ravings :). Sorry about the acronym. Amusingly I had to look up 
>>>>>>>>>>>> gish
>>>>>>>>>>>> gallop to understand what you meant :) I can assure you that I 
>>>>>>>>>>>> will never
>>>>>>>>>>>> gish gallop you or anyone on the list, and I find such techniques
>>>>>>>>>>>> repugnant. If I'm not making sense, I'm likely covering ground too 
>>>>>>>>>>>> fast,
>>>>>>>>>>>> skipping things that are in my head but not yours, expressing too 
>>>>>>>>>>>> many
>>>>>>>>>>>> tangents (when I start nesting parentheses this is (usually) a 
>>>>>>>>>>>> sign I'm
>>>>>>>>>>>> wandering too much), or I am simply mistaken about something. 
>>>>>>>>>>>> Always feel
>>>>>>>>>>>> free to ask me to explain!
>>>>>>>>>>>>
>>>>>>>>>>>> -Gus
>>>>>>>>>>>>
>>>>>>>>>>>> On Sun, Nov 21, 2021 at 12:17 AM Ishan Chattopadhyaya <
>>>>>>>>>>>> [email protected]> wrote:
>>>>>>>>>>>>
>>>>>>>>>>>>> Added both your suggestions to Google Docs for inline
>>>>>>>>>>>>> commenting and the SIP document at confluence. Thanks for the 
>>>>>>>>>>>>> feedback.
>>>>>>>>>>>>>
>>>>>>>>>>>>> On Sun, Nov 21, 2021 at 10:28 AM Ishan Chattopadhyaya <
>>>>>>>>>>>>> [email protected]> wrote:
>>>>>>>>>>>>>
>>>>>>>>>>>>>> I'll add the lifecycle details to the document as well.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> On Sun, 21 Nov, 2021, 9:08 am Ishan Chattopadhyaya, <
>>>>>>>>>>>>>> [email protected]> wrote:
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Hi Gus,
>>>>>>>>>>>>>>> Thanks for bringing it up again. Initially, I wasn't clear
>>>>>>>>>>>>>>> what you meant and mistook them for gish gallop.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> These were the things I am/was confused about (Noble
>>>>>>>>>>>>>>> explained it to me what you mean):
>>>>>>>>>>>>>>> - adherence to DRY via zk
>>>>>>>>>>>>>>> - runtime config info should come from zk
>>>>>>>>>>>>>>> - add dynamic features
>>>>>>>>>>>>>>> - same interaction patterns for consulting config values.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Now, after Noble's help, I think I understand your
>>>>>>>>>>>>>>> motivations.
>>>>>>>>>>>>>>> - DRY = Don't Repeat Yourself ;-)
>>>>>>>>>>>>>>> - You're suggesting that we have a standard way to have role
>>>>>>>>>>>>>>> specific configurations (in ZK), so that a new role added later 
>>>>>>>>>>>>>>> can access
>>>>>>>>>>>>>>> the configurations in a standard way
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> This is a very good suggestion, and makes complete sense
>>>>>>>>>>>>>>> now. This was definitely a missing piece!
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Here's a proposal to address that (adding it to Google Docs:
>>>>>>>>>>>>>>> https://docs.google.com/document/d/1hijvM1WX9u2TOUdLEkFYVCofLeJlv2MRZqe-ncobJVw/edit
>>>>>>>>>>>>>>> ):
>>>>>>>>>>>>>>>  - Per Role ZNode
>>>>>>>>>>>>>>>  - Every role's ZNode to hold configuration data (this is
>>>>>>>>>>>>>>> the key addition that you're asking for, IIUC)
>>>>>>>>>>>>>>>  - Children of role ZNodes to be list of ephemeral solr nodes
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> We can iterate over this on the Google Docs (internal
>>>>>>>>>>>>>>> representation ZK section) with inline commenting if we need to.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Please let us know how that sounds.
>>>>>>>>>>>>>>> Regards,
>>>>>>>>>>>>>>> Ishan
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> On Sun, Nov 21, 2021 at 4:49 AM Gus Heck <[email protected]>
>>>>>>>>>>>>>>> wrote:
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> It is difficult to track everything in this thread for
>>>>>>>>>>>>>>>> sure. Specifically, I don't feel my email of Wed, Nov 17, 7:43 
>>>>>>>>>>>>>>>> PM (EST) has
>>>>>>>>>>>>>>>> been addressed or responded to except for one difference of 
>>>>>>>>>>>>>>>> opinion with
>>>>>>>>>>>>>>>> Jan on whether or not we should prohibit the notion of any 
>>>>>>>>>>>>>>>> role ever
>>>>>>>>>>>>>>>> changing at runtime.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Note that I made a specific proposal for an addition to the
>>>>>>>>>>>>>>>> sip, regarding start up lifecycle and adherence to DRY via zk, 
>>>>>>>>>>>>>>>> in the
>>>>>>>>>>>>>>>> (probably not clearly expressed) hope that we can move to a 
>>>>>>>>>>>>>>>> general overall
>>>>>>>>>>>>>>>> application principle that at runtime config info should come 
>>>>>>>>>>>>>>>> from zk. If
>>>>>>>>>>>>>>>> we follow such a principle, we will always be in a position to 
>>>>>>>>>>>>>>>> add dynamic
>>>>>>>>>>>>>>>> features without significant rework, and all code could 
>>>>>>>>>>>>>>>> hopefully reuse the
>>>>>>>>>>>>>>>> same interaction patterns for consulting config values.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Neither item is addressed in the SIP currently.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Also I had put that out there as a single item so it could
>>>>>>>>>>>>>>>> be focused on (simplifying the discussion I hope), and 
>>>>>>>>>>>>>>>> depending on how
>>>>>>>>>>>>>>>> discussion proceeds, I may have other follow on items.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> -Gus
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> On Sat, Nov 20, 2021 at 8:45 AM Ishan Chattopadhyaya <
>>>>>>>>>>>>>>>> [email protected]> wrote:
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> On Fri, 19 Nov, 2021, 7:03 pm Ilan Ginzburg, <
>>>>>>>>>>>>>>>>> [email protected]> wrote:
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> Is the request here for everybody to express again the
>>>>>>>>>>>>>>>>>> concerns
>>>>>>>>>>>>>>>>>> already expressed in this email thread and not addressed?
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> I think the expectation now (after we've expressed our
>>>>>>>>>>>>>>>>> intention to reach a lazy consensus) is that if someone wants 
>>>>>>>>>>>>>>>>> to block this
>>>>>>>>>>>>>>>>> SIP from adoption, then to put forward the objections. Sort 
>>>>>>>>>>>>>>>>> of like a veto.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> I suggest instead the authors review the thread, match
>>>>>>>>>>>>>>>>>> expressed
>>>>>>>>>>>>>>>>>> concerns with how the concern was addressed (or not
>>>>>>>>>>>>>>>>>> addressed) and
>>>>>>>>>>>>>>>>>> provide an exhaustive list.
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> I've summarized most of the discussion in the SIP
>>>>>>>>>>>>>>>>> document. If you feel I could do a better job with it, please 
>>>>>>>>>>>>>>>>> help me with
>>>>>>>>>>>>>>>>> areas of improvement.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> This proposal in its current form (data and overseer
>>>>>>>>>>>>>>>>>> roles) doesn't
>>>>>>>>>>>>>>>>>> offer much that can't be reasonably achieved by other
>>>>>>>>>>>>>>>>>> means. I'd find
>>>>>>>>>>>>>>>>>> much more value in making sure what is done now is a
>>>>>>>>>>>>>>>>>> solid foundation
>>>>>>>>>>>>>>>>>> for the future.
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>> Fair enough, I understand your perspective. Thanks for
>>>>>>>>>>>>>>>>> your feedback.
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> Ilan
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> On Thu, Nov 18, 2021 at 11:24 PM Noble Paul <
>>>>>>>>>>>>>>>>>> [email protected]> wrote:
>>>>>>>>>>>>>>>>>> >
>>>>>>>>>>>>>>>>>> > After so many back and forth mails, I just can't say
>>>>>>>>>>>>>>>>>> who has an outstanding concern and if they are already 
>>>>>>>>>>>>>>>>>> addressed or not. I
>>>>>>>>>>>>>>>>>> think the Google doc would help us get clarity on that. 
>>>>>>>>>>>>>>>>>> Please take a
>>>>>>>>>>>>>>>>>> moment to give your inputs
>>>>>>>>>>>>>>>>>> >
>>>>>>>>>>>>>>>>>> > On Fri, Nov 19, 2021, 9:18 AM Ishan Chattopadhyaya <
>>>>>>>>>>>>>>>>>> [email protected]> wrote:
>>>>>>>>>>>>>>>>>> >>
>>>>>>>>>>>>>>>>>> >> Apologies, the vote hasn't passed formally and I was
>>>>>>>>>>>>>>>>>> under some confusion on the process.
>>>>>>>>>>>>>>>>>> >>
>>>>>>>>>>>>>>>>>> >> I'd like to proceed with a lazy consensus and proceed
>>>>>>>>>>>>>>>>>> to the implementation phase now.
>>>>>>>>>>>>>>>>>> >>
>>>>>>>>>>>>>>>>>> >> However, I would appreciate it if someone wants to
>>>>>>>>>>>>>>>>>> bring out any outstanding concerns about the SIP document.
>>>>>>>>>>>>>>>>>> >>
>>>>>>>>>>>>>>>>>> >> To facilitate in-line comments, here's a temporary
>>>>>>>>>>>>>>>>>> Google Docs version of this document.
>>>>>>>>>>>>>>>>>> >>
>>>>>>>>>>>>>>>>>> https://docs.google.com/document/d/1hijvM1WX9u2TOUdLEkFYVCofLeJlv2MRZqe-ncobJVw/edit?usp=sharing
>>>>>>>>>>>>>>>>>> >> (I shall copy changes back to confluence eventually)
>>>>>>>>>>>>>>>>>> >>
>>>>>>>>>>>>>>>>>> >> Thanks and apologies again regarding the confusion
>>>>>>>>>>>>>>>>>> with the voting,
>>>>>>>>>>>>>>>>>> >> Regards,
>>>>>>>>>>>>>>>>>> >> Ishan
>>>>>>>>>>>>>>>>>> >>
>>>>>>>>>>>>>>>>>> >> On Thu, Nov 18, 2021 at 9:50 PM Ishan Chattopadhyaya <
>>>>>>>>>>>>>>>>>> [email protected]> wrote:
>>>>>>>>>>>>>>>>>> >>>
>>>>>>>>>>>>>>>>>> >>> The SIP passed the voting phase. Thanks for all for
>>>>>>>>>>>>>>>>>> the feedback and insights.
>>>>>>>>>>>>>>>>>> >>> Looking forward to your collaboration and reviews as
>>>>>>>>>>>>>>>>>> we implement this.
>>>>>>>>>>>>>>>>>> >>>
>>>>>>>>>>>>>>>>>> >>> On Thu, Nov 18, 2021 at 9:42 PM Ishan Chattopadhyaya <
>>>>>>>>>>>>>>>>>> [email protected]> wrote:
>>>>>>>>>>>>>>>>>> >>>>
>>>>>>>>>>>>>>>>>> >>>> > It's fine if we don't provide any ability for
>>>>>>>>>>>>>>>>>> runtime modification of roles at this time but I'm leery of 
>>>>>>>>>>>>>>>>>> precluding it
>>>>>>>>>>>>>>>>>> in the future.
>>>>>>>>>>>>>>>>>> >>>>
>>>>>>>>>>>>>>>>>> >>>> In future, the necessity for such a facility can
>>>>>>>>>>>>>>>>>> dictate our course of action. We cannot lay down rules cast 
>>>>>>>>>>>>>>>>>> in stone for
>>>>>>>>>>>>>>>>>> functionality that we can't foresee yet.
>>>>>>>>>>>>>>>>>> >>>>
>>>>>>>>>>>>>>>>>> >>>> On Thu, Nov 18, 2021 at 9:40 PM Ishan Chattopadhyaya
>>>>>>>>>>>>>>>>>> <[email protected]> wrote:
>>>>>>>>>>>>>>>>>> >>>>>
>>>>>>>>>>>>>>>>>> >>>>> Thanks Jan, I added both those points to the SIP
>>>>>>>>>>>>>>>>>> document in the Notes section.
>>>>>>>>>>>>>>>>>> >>>>>
>>>>>>>>>>>>>>>>>> >>>>> On Thu, Nov 18, 2021 at 7:18 PM Jan Høydahl <
>>>>>>>>>>>>>>>>>> [email protected]> wrote:
>>>>>>>>>>>>>>>>>> >>>>>>
>>>>>>>>>>>>>>>>>> >>>>>> 18. nov. 2021 kl. 01:43 skrev Gus Heck <
>>>>>>>>>>>>>>>>>> [email protected]>:
>>>>>>>>>>>>>>>>>> >>>>>>
>>>>>>>>>>>>>>>>>> >>>>>>
>>>>>>>>>>>>>>>>>> >>>>>> 2) Roles will not be checked by loading config
>>>>>>>>>>>>>>>>>> from disk or caching disk config in memory. (zk ONLY source 
>>>>>>>>>>>>>>>>>> of truth)
>>>>>>>>>>>>>>>>>> >>>>>>
>>>>>>>>>>>>>>>>>> >>>>>>
>>>>>>>>>>>>>>>>>> >>>>>> It sounds a bit backward for a local node to first
>>>>>>>>>>>>>>>>>> parse solr.node.roles, determine its local set of roles, 
>>>>>>>>>>>>>>>>>> then publish them
>>>>>>>>>>>>>>>>>> to Zookeeper, and then read back its own roles from ZK.
>>>>>>>>>>>>>>>>>> >>>>>> Code that only needs to determine "Do I have the
>>>>>>>>>>>>>>>>>> XXX role?" or find out "What roles do I have" should be able 
>>>>>>>>>>>>>>>>>> to fetch the
>>>>>>>>>>>>>>>>>> (static) roles from some roles utility class without 
>>>>>>>>>>>>>>>>>> consulting ZK.
>>>>>>>>>>>>>>>>>> >>>>>> Code that needs to check what nodes have a certain
>>>>>>>>>>>>>>>>>> role (such as placement) would obviously need ot consult ZK.
>>>>>>>>>>>>>>>>>> >>>>>>
>>>>>>>>>>>>>>>>>> >>>>>> Perhaps the SIP should also state some Non-goals
>>>>>>>>>>>>>>>>>> or assertions such as
>>>>>>>>>>>>>>>>>> >>>>>> * Roles are static and immutable (also in zk) for
>>>>>>>>>>>>>>>>>> the entire life cycle of a node
>>>>>>>>>>>>>>>>>> >>>>>>
>>>>>>>>>>>>>>>>>> >>>>>> I also think we should state that the bar for
>>>>>>>>>>>>>>>>>> adding new roles should be high so it is not abused as any 
>>>>>>>>>>>>>>>>>> other tag or
>>>>>>>>>>>>>>>>>> label for any tiny feature. It should be reserved for 
>>>>>>>>>>>>>>>>>> functionality that
>>>>>>>>>>>>>>>>>> may benefit from a dedicated set of nodes. That may be clear 
>>>>>>>>>>>>>>>>>> already, but
>>>>>>>>>>>>>>>>>> you never know...
>>>>>>>>>>>>>>>>>> >>>>>>
>>>>>>>>>>>>>>>>>> >>>>>> Jan
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>> ---------------------------------------------------------------------
>>>>>>>>>>>>>>>>>> To unsubscribe, e-mail: [email protected]
>>>>>>>>>>>>>>>>>> For additional commands, e-mail: [email protected]
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> --
>>>>>>>>>>>>>>>> http://www.needhamsoftware.com (work)
>>>>>>>>>>>>>>>> http://www.the111shift.com (play)
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> --
>>>>>>>>>>>> http://www.needhamsoftware.com (work)
>>>>>>>>>>>> http://www.the111shift.com (play)
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>
>>>>>>>>> --
>>>>>>>>> http://www.needhamsoftware.com (work)
>>>>>>>>> http://www.the111shift.com (play)
>>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> --
>>>>>>>> http://www.needhamsoftware.com (work)
>>>>>>>> http://www.the111shift.com (play)
>>>>>>>>
>>>>>>>
>>
>> --
>> http://www.needhamsoftware.com (work)
>> http://www.the111shift.com (play)
>>
>

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