Which version of Mongodb should I use? - meteor

I'm using Meteor on my ubuntu 10.04 server, and I'm wondering which version of Mongodb I should use?
I do not see it in the documentation.

Meteor ships with MongoDB 2.2. But you should be able to connect to any version of MongoDB that version 1.1.5 of the JavaScript MongoDB driver supports.
The driver's docs don't tell us what versions it supports. But Mongo's wire protocol has been fairly stable, so I'd expect older versions of MongoDB to work well. Reports appreciated.

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MySQL/MariaDB C++ connector API documentation

I've just installed MariaDB's C++ connector, and run up their test program, which works fine. However, after a lot of searching on both the MariaDB and MySQL websites, I've found zero documentation on the API itself - PreparedStatement, getString, setString, and so on.
Should I instead assume that (a) the C++ API is identical to Oracle's Java API, and (b) my code will run with both MySQL and MariaDB? The JDBC 4.3 docs are at Oracle here. MySQL claims 4.0 compatibility, but MariaDB just says 'Implements JDBC API'.

What databases and versions are supported by Flyway 5.2.4 and older versions

Where can I find the flyway documentations for older versions? The flyway website only provides the supported databases for flyway 6 and 7. But we're still using SQL Server 2012, Oracle 11g etc, we would like to find a flyway community version which could support these old databases and versions.
The website flywaydb.org shows documentation for supported versions, and 5.2.4 is now quite elderly and out of formal support. We would recommend you use the latest version.

What's the version AWS SDK that supports TLS v1.2?

We're using AWS SDK .NET for getting files from AWS S3 storage. When the application was implemented a few years ago, the AWS was only supporting TLS 1.0. Now hopefully it's supporting TLS 1.2. I'd like to know which version and where I can download the library/packages. What's the minimum requirements for the .NET Framework? We're using the AmazonS3Client to handle the underlining connection to the S3 storage account.
Found the correct version that will be supporting the TLS 1.2.
https://aws.amazon.com/blogs/developer/upgrade-aws-sdk-for-net-for-latest-tls-protocols/

What's the latest version of berkeley-db-je?

What's the latest version of berkeley-db-je?
From oracle, it is 7.5.
But from maven repository, it is 18.3.12.
It there anyone know more details?
The latest version of Berkeley DB Java Edition is 7.5.11
https://www.oracle.com/technetwork/database/berkeleydb/overview/index-093405.html
The 18.x versions you are seeing in maven are Oracle NoSQL Database Community Edition (CE).
Some info on the database can be found here: https://docs.oracle.com/en/database/other-databases/nosql-database/19.5/concepts/introduction.html
Oracle NoSQL Database uses Oracle Berkeley DB Java Edition as its underlying storage engine.

Downgrading from Alfresco Enterprise to Alfresco Community

We’re thinking about downgrading our Alfresco Enterprise 3.4.1 to Alfresco Community.
I’m used to Alfresco Enterprise, but I have no experience with Community version.
We’re using EMC, Alfresco Explorer and our own development based on Web Services API and Foundation API.
I’m worried about database migration. Could I simply configure Alfresco Community 3.4.e to use our Oracle Database for Alfresco Enterprise 3.4.1? Is the schema compatible for both Community and Enterprise distributions? Which version of Alfresco Community should I use? 3.4.e? What is the downgrade path between distributions? Is there any kind of correspondence between versions of both distributions?
Any downgrade experience, guide or any related information will be welcomed.
The Alfresco Community Edition is open source, and works with a fully open source stack. Your DB options are PostGreSQL (recommended) or MySQL.
Alfresco Enterprise supports the open source databases that Community supports, PostGreSQL and MySQL, as well as a few proprietary databases too. You can look at the Database Configuration page for more information. Support for Oracle databases is only available in Enterprise.
If you want to keep paying Oracle all that money for your database licenses, then you'll need to continue to pay a tiny fraction of that cost to Alfresco for an Enterprise License. Community, being open source, only supports a fully open source stack, so you can't use Community with your uber expensive proprietary database!
If you were using an open source database like PostGreSQL or MySQL, then you might be able to do the switch as part of an upgrade. Enterprise Service Packs (eg 3.4.1) are normally newer than the equivalent community release from that series (Community gets the bug fixes on Head). Moving from a 3.4.x enterprise service pack back to a 3.4 community wouldn't be recommended, but moving from 3.4.x enterprise to a 4.x community might work. However, that's not a tested migration path, so you could well be on your own... Alfresco QA tests community -> newer community, enterprise -> newer enterprise, and community upgrading to enterprise, which are the supported paths.
This question is similar with this one about difference between Community and Enterprise version
You can not use Oracle database for Community version. It is only available for Enterprise.
There is not downgrade path for any Alfresco versions. If you are using Enterprise 3.4.2 try to use the same Community version.
I searched the web for possibilities of a downgrade from enterprise to community version, too. What I found is the answer "You may be able to downgrade, however that is never supported or tested."
When downgrading, you have to keep in mind that the community version X usually has more functionalities than the enterprise version with the same version number.
So, downgrading is experimental. I have already seen log files where the downgrade failed.
Maybe it is an option for you to export all content and import this ACP file on the new system with the community version?
Please read your contract carefully. Support and Licensing might not be the same thing in your case. If you don't want to pay anymore to Alfresco, you might be entitled to keep using your current enterprise version, but you would not longer have support. Before considering downgrading, check your contract. If in the future you want to get support and upgrade again, it might just be easier to do it with your current Alfresco Enterprise version.
But, as I said, it depends on your agreement with Alfresco.
Migration of the Alfresco repo database is no fun at all. There is no official way switching databases and in 3.x version you may have serialized objects which could be stored by hibernate db specific. This changed a little when Alfresco removed most of hibernate dependencies after 3.4. It may be an option to migrate to 4.0 EE first, migrate the db to postgres (which is closer to oracle than mysql) and finally upgrade to Alfresco Community 4.2.f (latest version with Web Services API). This may be a lot of work (even in your code) but should work.
Here in Germany it is legaly problematic to limit software usage in time if you sell a support subscription (at least for the old contracts you may have) so customers here can request support for a time unlimited EE license key before canceling the subscription contract. I recommend you go this way and update your old 3.4 to the latest 3.4.x or 4.x enterprise version available and stay on Oracle db if you don't care these costs. This step should be done anyway ;-)
I have done it before in order to create a development environment in my local machine,
First, you cannot use Oracle database so you have to use postgresql (recommended) or MySql, exporting and importing the database is not recommended, so you have to create the repository hierarchy and fix the rules, etc., then copy all custom jars (jobs, actions, workflows...) and library from the lib folder to the new one,
If you are using an external application based on alfresco uuids, make sure you updated the uuids after creating the repositories and rules

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