For a few day we had a quick request at a customer which was to replace a voting disk in an ASM disk group. The current ASM disk group (redundancy normal) had 3 disks : two located in one data center and one disk in another data center. The goal was to replace one voting disk (from the most used Data Center) with one disk coming from a third Data Center.
Dans mon dernier article sur PostgreSQL, j’ai présenté l’installation du logiciel en explorant les 2 solutions suivantes, l’installation Debian et l’installation EntrepriseDB. Ces deux installations créent immédiatement un cluster de base de données, Debian nous imposant le point de stockage et EntrepriseDB nous proposant de saisir une destination. Je vous propose maintenant d’explorer ce qui a été installé sur votre disque à la mise en route de ce cluster de base et d’analyser les différences entre les deux installations.
For this last day () of the TechEd 2012, I going to present the new certification cycle for dba who wants to be certified for SQL Server 2012. But before, let’s start with a brief introduction on Enterprise Information Management, also called EIM
Today, no keynote, we went directly to the sessions. Therefore I have scheduled my day around 3 goals: SQL Server 2012 and Windows Server 2012 and Parallel Datawarehouse, with the new features in the release AU3.
In this example the below tables from schema G001SCHEMA on Database PROD1 will be added, to an existing Replication from PROD1 to REP
This morning, I was very happy to go to my first TechEd. Between the 10 seminars, as I said yesterday, I started with SQL Server 2008R2/2012 performance, tuning and optimization session. The thing is that we had just one session for the whole day. I will not copy the presentation of the 2 speakers (Thomas LaRock and Denny Cherry) who presented remarkably this session despite the failure of air conditioning during the morning. Fortunately, it…
Few days ago, I was at a customer that encountered some problems trying to restore his MySQL database. Indeed he got the following error message trying to restore his xwiki database:
[email protected]:/ [mysqld1] mq < /MyBackupFile.sql
ERROR 2006 (HY000) at line 283: MySQL server has gone away
Data can be corrupted in different ways, for example an I/O issue when reading data from the storage or a memory issue when updating data. The db_block_checking parameter allows to change the behavior of an Oracle database concerning block checking.
This posting will present this parameter and some tests to measure its impact on the database.