I'll highly advice if you can use Java library/SolrJ to connect to Solr than .Net. There are many things taken care by CloudSolrClient and other classes when communicated with Solr Cloud having shards/replica's etc and if your .Net port for SolrJ are not up to date/having all the functionality (which I am sure) , you may run into issues.
Thnx On Mon, Sep 17, 2018 at 10:01 AM Jan Høydahl <jan....@cominvent.com> wrote: > > We are beginners to Apache SOLR, We need following clarifications from > you. > > > > > > > > 1. In SOLRCloud, How can we install more than one Shared on Single > PC? > > You typically have one installation of Solr on each server. Then you can > add a collection with multiple shards, specifying how many shards you wish > when creating the collection, e.g. > > bin/solr create -c mycoll -shards 4 > > Although possible, it is normally not advised to install multiple > instances of Solr on the same server. > > > 2. How many maximum number of shared can be added under on > SOLRCloud? > > There is no limit. You should find a good number based on the number of > documents, the size of your data, the number of servers in your cluster, > available RAM and disk size and the required performance. > > In practice you will guess the initial #shards and then benchmark a few > different settings before you decide. > Note that you can also adjust the number of shards as you go through > CREATESHARD / SPLITSHARD APIs, so even if you start out with few shards you > can grow later. > > > 3. In my application there is no need of ACID properties, other than > > this can I use SOLR as a Complete Database? > > You COULD, but Solr is not intended to be your primary data store. You > should always design your system so that you can re-index all content from > some source (does not need to be a database) when needed. There are several > use cases for a complete re-index that you should consider. > > > 4. In Which OS we can feel the better performance, Windows Server > OS / > > Linux? > > I'd say Linux if you can. If you HAVE to, then you could also run on > Windows :-) > > > 5. If a SOLR Core contains 2 Billion indexes, what is the > recommended > > RAM size and Java heap space for better performance? > > It depends. It is not likely that you will ever put 2bn docs in one single > core. Normally you would have sharded long before that number. > The amount of physical RAM and the amount of Java heap to allocate to Solr > must be calculated and decided on a per case basis. > You could also benchmark this - test if a larger RAM size improves > performance due to caching. Depending on your bottlennecks, adding more RAM > may be a way to scale further before needing to add more servers. > > Sounds like you should consult with a Solr expert to dive deep into your > exact usecase and architect the optimal setup for your case, if you have > these amounts of data. > > > 6. I have 20 fields per document, how many maximum number of > documents > > can be inserted / retrieved in a single request? > > No limit. But there are practical limits. > For indexing (update), attempt various batch sizes and find which gives > the best performance for you. It is just as important to do inserts > (updates) in many parallell connections as in large batches. > > For searching, why would you want to know a maximum? Normally the usecase > for search is to get TOP N docs, not a maximum number? > If you need to retrieve thousands of results, you should have a look at > /export handler and/or streaming expressions. > > > 7. If I have Billions of indexes, If the "start" parameter is 10th > > Million index and "end" parameter is start+100th index, for this case > any > > performance issue will be raised ? > > Don't do it! > This is a warning sign that you are using Solr in a wrong way. > > If you need to scroll through all docs in the index, have a look at > streaming expressions or cursorMark instead! > > > 8. Which .net client is best for SOLR? > > The only I'm aware of is SolrNET. There may be others. None of them are > supported by the Solr project. > > > 9. Is there any limitation for single field, I mean about the size > for > > blob data? > > I think there is some default cutoff for very large values. > > Why would you want to put very large blobs into documents? > This is a warning flag that you may be using the search index in a wrong > way. Consider storing large blobs outside of the search index and reference > them from the docs. > > > In general, it would help a lot if you start telling us WHAT you intend to > use Solr for, what you try to achieve, what performance goals/requirements > you have etc, instead of a lot of very specific max/min questions. There > are very seldom hard limits, and if there are, it is usually not a good > idea to approach them :) > > Jan > >
