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From <ja...@productive1.com>
Subject RE: Should we keep the multi-tenants feature in OFBiz?
Date Wed, 05 Sep 2018 01:14:47 GMT
So if you don't have multi-tenancy does that mean every tenant has their
own install of OFbiz, their own install of Postgres SQL, and their own
server farm?

-------- Original Message --------
Subject: Re: Should we keep the multi-tenants feature in OFBiz?
From: Taher Alkhateeb <slidingfilaments@gmail.com>
Date: Tue, September 04, 2018 9:12 am
To: user@ofbiz.apache.org

The question is: is it worth keeping it? To answer this question,
perhaps we need to perhaps look at the pros and cons

pros of keeping multi-tenancy:
- less memory consumption.
- less storage consumption.
- single deployment (less effort)

cons of keeping multi-tenancy:
- Inflexibility: all tenants are stuck with the same code base.
- risk: if one tenant goes down, all tenants go down. There is less
redundancy and recovery.
- lock-in: splitting out tenants to a new separate instance is hard
and time consuming.
- code complexity: The multi-tenancy feature in OFBiz is making nearly
every critical artifact in the system complex. It is hard wired in
tomcat, components, data loaders and many other places. I stopped
counting the "if" conditions to handle the multi-tenant corner cases
all over the code base.
- alternatives less complex: the advent of new technologies like
docker and containerization makes the need for multi-tenancy less
desired. Also, storage and memory is getting cheaper all the time. So
the pros listed above are getting less valuable over time.

So for all the above, I find myself leaning more towards removing
multi-tenancy from the code base.


On Tue, Sep 4, 2018 at 5:49 PM Mike <mz4wheeler@gmail.com> wrote:
>
> My opinion is to just completely ditch the multi tenant code since it seems
> to be more trouble than it's worth. Anyone serious about designing a
> system to support a similar concept would do it their own way anyway, most
> likely using completely separate DBs. Face it, using a common DB and share
> between separate companies is a dangerous concept, let alone the scaling
> issues involved.
>
>
>
>
> On Sun, Sep 2, 2018 at 1:33 AM Jacques Le Roux <jacques.le.roux@les7arts.com>
> wrote:
>
> > Hi,
> >
> > Note: this conversation started on the dev ML:
> > https://markmail.org/message/hb2kt5nkodhwnkgw
> >
> > The multi-tenants feature in OFBiz only allows a dozens or maybe even few
> > hundreds tenants, after it begin to be a lot of DBs!
> > I faced that with a startup which wanted to handle thousands, if not
> > millions (actually they failed), of tenants, obviously OFBiz can't do that.
> >
> > I don't break any secret to say that I was working with David (and Andrew)
> > on a project in 2010 when David had to quickly answer to the client's
> > demand who wanted to have tenants. David brilliantly and quickly
> > delivered, but it was only a start.
> >
> > After many improvements, this feature still have some issues
> > https://issues.apache.org/jira/browse/OFBIZ-6066
> > https://issues.apache.org/jira/browse/OFBIZ-7900
> > https://issues.apache.org/jira/browse/OFBIZ-6164
> > https://issues.apache.org/jira/browse/OFBIZ-6065
> >
> > Also this is somehow related
> > https://issues.apache.org/jira/browse/OFBIZ-6712
> >
> > And most importantly
> > https://issues.apache.org/jira/browse/OFBIZ-7112
> > https://issues.apache.org/jira/browse/OFBIZ-7754
> >
> > I recently read this article
> >
> >
> > https://www.linkedin.com/pulse/architecture-constraints-end-multi-tenancy-gregor-hohpe/
> >
> > and, after my experiences with multi-tenant as is in OFBiz, it made me
> > wonder if we should not think about how it's done now in OFBiz in 2018 with
> > the
> > clouds being everywhere!
> >
> > Before sending this email, I quickly exchanged with David about how Moqui
> > handles that now. And we are on the same page, see
> >
> > https://www.linkedin.com/groups/4640689/4640689-6180851287941201924
> >
> >
> > https://stackoverflow.com/questions/41952818/does-moqui-framework-2-0-still-support-mutli-tenency?rq=1
> > [1]
> >
> > [1] Initially David gave me this link
> >
> > https://www.linkedin.com/pulse/multi-instance-moqui-docker-david-e-jones/
> >
> > but it seems LinkedIn has lost it, as said in the stackoverflow comment.
> >
> > So IMO why not deprecating the multi-tenants as is now and rather push a
> > multi-instances way?
> >
> > Opinions?
> >
> > Jacques
> >
> >

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