17
votes
Accepted
Mongo vs SQL Server with Sitecore 9 Update 2
1) Infrastructure
MongoDB will introduce new element into infrastructure of your solution. This increases cost of servers, cost of maintenance and at the end complicates the overall solution ...
- 9,386
15
votes
Accepted
What happens when MongoDB is down?
It's also important to know that while Mongo is not available, analytic data is being collected. Sitecore will store the data to the file system until such time the collection server comes back online....
- 783
15
votes
Sizing MongoDB Servers for xDB
Sitecore recommends here the minimum hardware for planning an xDB with Session State as follows:
MongoDB
2 Collection database (MongoDB) servers
4 x CPU E5 2650 v2 processors
16GB RAM (the more the ...
- 2,979
12
votes
Accepted
Is MongoDB a prerequisite to install EXM?
As EXM does not support CMS-only mode, xDB is required to run EXM. See the documentation on all the components that require xDB.
When you send an email campaign, the Email Experience Manager (EXM) ...
- 5,678
11
votes
Accepted
How to handle xDB during a Sitecore upgrade?
To answer your question, really, I feel it's prudent to walk through
the deployment steps and call out where places that might be gotchas.
I'll finish with a summary of what I would do.
Sitecore ...
- 14.6k
11
votes
Accepted
What happens if i remove Mongo server from a Sitecore 8 site
There are several things which doesn't work properly anymore. You can disable it in the config. Go to /App_Config/Include/Sitecore.Analytics.config and set Analytics.Enabled to false:
<setting ...
- 608
11
votes
Accepted
No contact created in MongoDB when session is closed
I know you have already found the exact solution for your particular case. Still, I'm going to list the steps I normally take when troubleshooting data saving issues in xDB. Hopefully, this can help ...
- 12.6k
10
votes
Accepted
How can I utilise MongoDB for non-xDB related things in my Sitecore solution?
Utilizing data extension points
The first thing I would consider is whether your data can be stored as part of the standard Sitecore entities.
Contact
The xDB contact has the following fields where ...
- 12.6k
10
votes
What happens when MongoDB is down?
If the collections database is unavailable, analytics data for a user's session will still be collected and stored in Session. The problem comes when the session times out and Sitecore attempts to ...
- 2,536
10
votes
Sitecore 9 xDB Support for MongoDB
Sitecore provides the xDB Data Conversion tool that supports xDB data conversion. This tool will help you in migrating the data from Sitecore Experience Database 8.x to Sitecore Experience Database 9....
- 1,477
10
votes
Accepted
How do you resolve a MongoDB 'connection string is not valid' after upgrading?
The MongoDB driver between the two version changed, which includes a refactoring of the validation for connection strings.
Checking with MongoDB.Driver.dll the version details can be seen as the ...
- 17.9k
9
votes
Accepted
Is it possible to distribute my xDB MongoDB databases over 3 locations?
Sitecore-specific replica set considerations
Your question is partially answered here:
What are the best practices for MongoDB replica set latency?
That question discusses how latency affects a ...
- 12.6k
9
votes
Accepted
Sizing MongoDB Servers for xDB
Nonlinear Digital did a little rule of thumb for 7.5, I guess it still holds true(ish) now - they said:
"As a basic rule of thumb, Sitecore calculates diskspace sizing projections using 5KB per ...
- 2,642
9
votes
Accepted
MongoDB disk IOPS
If your throughput consist out of more than 100.000 writes per second, I would recommend you use an SSD. I think you should not overkill your machine. MongoDB cache will only take up to 10% of your ...
- 634
9
votes
Accepted
How do I run MongoDB and SOLR Docker images that work with Windows Server 2016?
You mentioned in comments that you're getting an error—this is because there is no tag in my docker hub repository. I wouldn't know which version of Sitecore latest should be build against: 8.2 or 8.1 ...
- 196
9
votes
Accepted
How can I create a custom report in Experience Analytics?
Basically, it is a kind of difficult sometimes to query the MongoDB directly, I had a similar scenario and following what I did:
I created aggregation processor that will be called when you rebuild ...
- 1,370
8
votes
MongoDB disk IOPS
Here's my understanding (from notes taken during a Mongo engagement a while back): for MongoDB, the more RAM the better. MongoDB performs everything in memory (by default) and flushes it to disk in a ...
- 1,299
8
votes
Accepted
What are the best practices for MongoDB replica set latency?
In general, if your data nodes are hosted in different geographical regions, latency between them will be considered high.
Write concern
High latency will make the replication process slower, which ...
- 12.6k
8
votes
ERROR: Cannot create tracker (Message:session is not initialized) Sitecore 8.1 update 2
I have experienced both of the errors that you mention in an 8.1.2 instance - sometimes together and other times separately. The below are the most common causes and solutions for these issues, in my ...
- 8,929
7
votes
Accepted
MongoDB and Disaster Recovery
Currently, for enterprise installations of MongoDB, the Sitecore Best Practice for Disaster Recovery of Mongo rests solely on the Best Practices of MongoDB specifically and are not entirely different ...
- 14.6k
7
votes
Sitecore MongoDB Compatibility Version
I'll use some common sense from another post that I saw here that was about Sitecore 8.2 does not officially support Windows Server 2016 but is it compatible in reality and will it work in production? ...
- 2,979
7
votes
Accepted
Setup Mongo DB with Sitecore 9.2
MongoDB is an open-source database management system (DBMS), usually called NoSQL database that uses a document-oriented database model which supports various forms of data. It means you don't need to ...
- 5,168
6
votes
Can I use the in-memory storage engine for my MongoDB based sessions?
Yes - there are several advanced ways this can be used - but as I see it the main drawback will be that you expose yourself to a heavy denial of service attack.
The in-memory provider will block ...
- 631
6
votes
What weighs in when migrating lots of external content to MongoDB and/or SOLR?
Personally I've always seen and treated Solr as a transient index, not a persistent storage solution. Whereas MongoDB has always been treated as a storage solution, and not much of an index. But this ...
- 565
6
votes
Accepted
Where can I find the NuGet package(s) for MongoDB required by Sitecore 8.1 (update 3)
The package was renamed on nuget, what you want is the mongocsharpdriver package. You can get 1.10.0.62 by using:
Install-Package mongocsharpdriver -Version 1.10.0
That package contains boths ...
- 4,154
6
votes
MongoDB historical data and data truncation
Grant Killian wrote on his blog about using MongoDB TTL (Time to Live) Indexes to continuously purge xDB data based on an interval.
The crux of the post that pertains to this:
MongoDB supports “...
- 6,751
6
votes
How do I get access to my Contact Card information
The issue that you are seeing is because you are trying to instantiate a new ContactRepository().
The appropriate way to reference the repository is by creating the object through Sitecore's ...
- 14.6k
6
votes
Accepted
How to Join MongoDb Collections Using Sitecore Mongo Db Report Data Source
You can access MongoDB directly through the C# driver:
string connectionString = ConfigurationManager.ConnectionStrings["analytics"].ConnectionString;
var client = new MongoDB.Driver.MongoClient(...
- 12.6k
5
votes
What happens if i remove Mongo server from a Sitecore 8 site
Yes, you can disable xDB.
You need to add a patch file Xdb.Enabled and Xdb.Tracking.Enabled set to false:
<setting name="Xdb.Enabled">
<patch:attribute name="value">false</patch:...
- 23.1k
5
votes
Accepted
Contact (guid) could not be locked in the xDB
I have solved this issue. It was due to following the recommended enable/disable configuration guide (https://doc.sitecore.net/sitecore_experience_platform/setting_up__maintaining/xdb/...
- 4,123
Only top scored, non community-wiki answers of a minimum length are eligible