Database Administrator

1 week ago

India Zensar Technologies Full time

Profile :DBA
- A database administrator (DBA) manages computer databases. The role may include capacity planning, installation, configuration, database design, migration, performance monitoring, security, troubleshooting, as well as backup and data recovery.
- 10 - 15 Year relevent Experience
- 10 - 15 Year relevent Experience
- DB
- Oracle, MS SQL, MySQL, Postgre
- Skill Set
- Capacity Planning
- Ensuring that the database hardware and configuration allows for good operational readiness at any appropriate, planned level of usage.
- Knowledge and data to show the current capacity of systems which are in place and the impact on future plans for growth.
- Installation
- Installing as per vendor best-practice documentation in a manner which allows for best-possible performance
- By preparing well, you ensure that you do not need to change an entire configuration later, at the cost of downtime.
- Configuration
- Ensuring that the database configuration handles user needs
DB has enough RAM / CPU / Disk IO to handle queries
DB is maintained to ensure data-files are defragmented,
- indexes are reorganized and pruned
- statistics are up-to-date
- No critical errors are happening
- No ‘poison’ wait types are in the Management views
- Knowing the impact of each configuration option in SQL server to its operation
E.g. knowing that enabling “Snapshot Isolation Transactions” mean that TempDB is going to be working much harder and so disk reads/writes are critical to monitor when this option is enabled.
- Database Design
- DBA should have their own DB which audits changes to the DB and its configuration as well as auditing logons to the server and changed made to schema.
- Migration
- DBA should be able to migrate to new hardware as needed
- Performance Monitoring
- DBA needs to be able to explain why the DB is slow at certain times (common issues are CPU, Disk, RAM, Locking/Blocking)
- Security
- The DBA team are responsible for the security of data stored in the database, both in terms of disaster planning as well as physical security
- Managing logons (users) for the database as well as roles and permissions
- Monitoring for unauthorized access or suspicious activity such as deletions of data
- Many of our customers use an “Audit” database which tracks changes using the SQL Server ‘Events’ system.
- Troubleshooting
- o Errors which show up in the error logs, the Management Views of SQL server or the Agent log should be resolved
- Some of these could be trivial while others could indicate corruption of data that needs to be remedied via the SQL server toolset
- Backup and Recovery
- Checking the integrity of backups and the validity of the recovery process is usually done quarterly

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