Archive for September, 2010

Oracle software certified on Amazon EC2

September 21, 2010  |  cloud, dba, linux, weblogic  |  9 Comments

Amazon and Oracle have announced that a wide selection of Oracle enterprise software is now certified to run on Amazon   EC2 (Elastic Compute Cloud). Oracle customers can now fully leverage the scalability, reliability, and affordable pricing model of Amazon Web Services (AWS) for production environments with full support from...

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Oracle Exalogic: the cloud in a box.

September 20, 2010  |  weblogic  |  No Comments

Oracle announced first and only integrated middleware machine—a combined hardware and software offering designed to revolutionize data center consolidation. Oracle Exalogic is pre-assembled and delivered in standard 19” 42U rack configurations. Each Exalogic compute node is a a standard 1U enclosure containing two 6-core processor with two solid-state disks (SSDs), which host...

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RMAN-06054: Media Recovery requesting unknown log

September 13, 2010  |  dba  |  No Comments

Recovery is a very complex Oracle topic. When a database is lost or damaged, beeing able to recover it is the top priority. A production database should always run on ARCHIVELOG mode and should have implemented a solid backup strategy. But sometimes people run databases on NOARCHIVELOG mode, and implement cold...

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Amazon EC2 Micro Instances

September 9, 2010  |  cloud, linux  |  2 Comments

Today amazon announced the availability of Micro instances for Amazon EC2. These are low cost instance type designed for lower throughput applications and web sites. These low cost instances provide 613 MB of memory and support 32-bit and 64-bit platforms on both Linux and Windows. Micro instance pricing for On-Demand instances...

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Database Link 10g 11g Fails ORA-01017

September 9, 2010  |  dba, security  |  13 Comments

When I was testing a database link between a 10g database and an 11g databaase, i got ORA-01017: invalid username/password; logon denied followed by ORA-02063: preceding line from dblink11g. A database link is a schema object in one database that enables you to access objects on another database. The other database...

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