Here you can see that the payload transaction load is initially quite stable in average 2.3K trx/sec level (with one dip down to 1.3 trx/sec level, though). The large transaction is submitted at the “Huge trx Begin” mark, and the execution of the large transaction continues in the fir...
Max degrees of parallelism (a.k.a MAXDOP) in SQL Server is used to control the maximum number of threads per execution plan operators work.MAXDOP does not restrict the number of CPU’s/Threads used by single batch or Query. Ideally MAXDOP should be equal to number of online schedulers per...
Merge Replication is a mechanism intended for redistributing database objects from one SQL Server database to another. These data bits are replicated, distributed, and consequently synchronized in order to maintain a level of consistency. This article deals with the process of SQL Server Merge Repli...
If you are starting from scratch, it is pretty easy to solve this by having each server include the server descriptions in all of its schema names so that all schema names are unique (i.e. "london_accounts", "chicago_accounts", rather than just "accounts" on both servers). But if you...
In an AlwaysOn Availability Group, an AlwaysOn secondary cannot be a publisher. Republishing is not supported when replication is combined with AlwaysOn. Heterogeneous replication to non-SQL Server subscribers is deprecated. To move data, create solutions using change data capture and SSIS. ...
To overcome the aforementioned issues associated with having a single database server node, we can set up multiple database server nodes. The more nodes, the more resources we will have to process incoming traffic. Also, if a database server node is down, the system can still process request...
The setup used in the lab for this document uses one Cisco UCS 240 M5 Rack Server to run Veeam Backup & Replication and three Cisco UCS C240 M5 Rack Servers to run Scality RING. This is just one out of many configuration options, and the combination will also work...
The final field that is added is a lineage field. This is a field that tracks the version and replica number of each record in each table. This field is used to ensure that when a change has been processed, it isn’t sent again for reprocessing. ...
occurs each time a connectivity change, a server crash or recovery, or a voluntary join/leave occurs. The set of par- ticipants that can be reached by a server at a given moment in time is called a view. The replication layer handles the ...
AlthoughConcertoappears to be straightforward conceptually, implementing it in practical systems and making an effective use of it are not without challenges. As a case study, we integratedConcertointo Redis, which is one of the most popular distributed in-memory NoSQL systems [6], though, when ...