Re: SolrCloud upgrade concern

2020-05-29 Thread gnandre
Thanks for all this information. It clears lot of confusion surrounding CDCR feature. Although, I should say that if CDCR functionality is so fragile in SolrCloud and not worth pursuing much, does it make sense to add some warning about its possible shortcomings in the documentation? On Thu, May 2

Re: SolrCloud upgrade concern

2020-05-28 Thread Jan Høydahl
I had a client who asked a lot about CDCR a few years ago, but I kept recommending aginst it and recommended them to go for Ericks’s alternative (2), since they anyway needed to replicate their Oracle DBs in each DC as well. Much cleaner design to let each cluster have a local datasource and alw

Re: SolrCloud upgrade concern

2020-05-27 Thread Erick Erickson
The biggest issue with CDCR is it’s rather fragile and requires monitoring, it’s not a “fire and forget” type of functionality. For instance, the use of the tlogs as a queueing mechanism means that if, for any reason, the communications between DCs is broken, the tlogs will grow forever until the

Re: SolrCloud upgrade concern

2020-05-27 Thread gnandre
Thanks, Jason. This is very helpful. I should clarify though that I am not using CDCR currently with my existing master-slave architecture. What I meant to say earlier was that we will be relying heavily on the CDCR feature if we migrate from solr master-slave architecture to solrcloud architectur

Re: SolrCloud upgrade concern

2020-05-27 Thread Jason Gerlowski
Hi Arnold, >From what I saw in the community, CDCR saw an initial burst of development around when it was contributed, but hasn't seen much attention or improvement since. So while it's been around for a few years, I'm not sure it's improved much in terms of stability or compatibility with other

Re: SolrCloud upgrade concern

2020-05-22 Thread gnandre
Thanks for this reply, Jason. I am mostly worried about CDCR feature. I am relying heavily on it. Although, I am planning to use Solr 8.3. It has been long time since CDCR was first introduced. I wonder what is the state of CDCR is 8.3. Is it stable now? On Wed, Jan 22, 2020, 8:01 AM Jason Gerlow

Re: SolrCloud upgrade concern

2020-01-22 Thread Jason Gerlowski
Hi Arnold, The stability and complexity issues Mark highlighted in his post aren't just imagined - there are real, sometimes serious, bugs in SolrCloud features. But at the same time there are many many stable deployments out there where SolrCloud is a real success story for users. Small example

Re: SolrCloud upgrade concern

2020-01-16 Thread David Hastings
ha, im on that thread, didnt know they got stored on a site, thats good to know! -i stand by what i said in there. so i have nothing more to add On Thu, Jan 16, 2020 at 3:29 PM Arnold Bronley wrote: > Hi, > > I am trying to upgrade my system from Solr master-slave architecture to > SolrCloud a

SolrCloud upgrade concern

2020-01-16 Thread Arnold Bronley
Hi, I am trying to upgrade my system from Solr master-slave architecture to SolrCloud architecture. Meanwhile, I stumbled upon this very negative post about SolrCloud. https://lucene.472066.n3.nabble.com/A-Last-Message-to-the-Solr-Users-td4452980.html Given that it is from one of the initial au