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| thevishy | Hello, can anyone please tell me if ZeO basically stores the code itself in ZODB so other clients can take it and run it? | 11:02 |
|---|---|---|
| thevishy | its after all a Python Object Store | 11:02 |
| mgedmin | ZEO is just a protocol for accessing ZODB over the network | 11:04 |
| mgedmin | ZODB stores arbitrary (picklable) Python objects | 11:04 |
| betabug | instead of saying "zodb data is in this file data.fs" now "zodb data is over there on the network" | 11:04 |
| mgedmin | it's possible to store (source) code in the ZODB and evaluate it dynamically, but I doubt it would simplify your distributed deployments in any way | 11:05 |
| thevishy | mgedmin: that is correct, I don't think its a good way but I am suspecting if we are doing that | 11:06 |
| thevishy | and mgedmin does Zope have a natural way to make this possible i.e like a setting? | 11:06 |
| thevishy | instaed of hacking around - is there a setting in Zope that says "Hey load the code from the ZeO" | 11:06 |
| mgedmin | if you create Python Script objects via the ZMI, these are stored in the ZODB | 11:07 |
| mgedmin | (which can be ZEO) | 11:07 |
| thevishy | ah right I need to check if our app does this | 11:08 |
| thevishy | our Controllers reside in ZODB | 11:08 |
| thevishy | and that means our app code is in ZeO | 11:08 |
| thevishy | if we are using RDBMS then is there a need for ZEO? | 11:14 |
| thevishy | ZEO is for scaling Zope nodes that using ZODB backend right? | 11:14 |
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| thevishy | I think lot of things like Configurations can reside in ZEO and even say Session Management | 11:15 |
| thevishy | so basically that means we should chose where we should use ZeO for | 11:16 |
| thevishy | and normall app code in ZeO is not a good idea ... because the moment you do am operation request.set you are writing to DB | 11:16 |
| betabug | you are confusing a lot of things | 11:17 |
| betabug | you want to use ZEO because you want to spread requests across multiple zope instances (to spread load) | 11:18 |
| betabug | for everything else, ZEO is just like using normal ZODB, it's just one of the storage options for ZODB | 11:18 |
| thevishy | betabug: i think yeah you are right | 11:19 |
| thevishy | its sort of confusing to me, like what we use ZODB for if we are actually using RDBMS | 11:19 |
| thevishy | I feel that things like Configuration can reside in ZEO for example | 11:19 |
| thevishy | okay let me ponder over that point | 11:20 |
| thevishy | so that means ZEO servers as both a datastore and a load balancer | 11:20 |
| thevishy | I will read the documentation | 11:21 |
| betabug | no, ZEO is not a load balancer | 11:21 |
| betabug | but it can give you the option to use a load balancer | 11:22 |
| thevishy | betabug: so in an application where we don't use ZODB, then ZEO is not needed | 11:29 |
| thevishy | a load balancer with zope nodes = scalability | 11:29 |
| thevishy | so I am trying to understand how ZEO helps in scaling if not LB | 11:29 |
| thevishy | the only other thing I can think of is like a common datastore for things like Configuration, User Sessions etc | 11:30 |
| thevishy | instaed of storing this in Database which is also possible | 11:30 |
| thevishy | ok basically if you are using RDBMS still you need ZEO to scale | 11:51 |
| thevishy | what is the value addition of ZEO in the case of RDBMS | 11:52 |
| thevishy | https://docs.zope.org/zope2/zope2book/ZEO.html | 11:54 |
| thevishy | "For example, if you have five servers, then you must ensure that all five server installations are populated with the same information." | 11:54 |
| thevishy | so here my question is what does "Information" mean Application Logic, Application Configuration, Application Data or Zope Logic, Zope Configuration or Zope Data! | 11:55 |
| thevishy | ok I am stepping out will be back later | 11:58 |
| thevishy | thank you for taking time out for helping betabug and mgedmin | 11:58 |
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