working with the iodbc driver manager on mac os x has been a frustration on two fronts. first, the installer api functions provided by iodbc constantly set the configuration mode to ODBC_BOTH_DSN, which means you have to keep resetting it to the correct value after nearly every installer api call. this problem is platform-agnostic ? the iodbc code is just plain wrong. second, when called from the odbc administrator application on mac os x, any failures that the driver reports or passes through from the installer api in registering the driver are ignored, and the application instead uses a generic prompt for dsn configuration. so even with the first problem fixed, the second problem has led to a lot of tail-chasing until i discovered that the odbc administrator application only obtains enough privileges to write to /Library/ODBC as a member of the admin group, not as the root user. because the connector/odbc installer was trying to be helpful in only creating the /Library/ODBC/*.in...
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Migrating from one RDBMS to anotherFrom: haidongji.com
Post Date: 2008-03-03 20:17:34
Here is some of my thoughts on migrating MySQL to Sql Server. It came out of an email discussion. I’d love to hear your thoughts on migrating to a different database platform, not just MySQL to Sql Server.
I actually thought about writing a white paper or even a course on migrating from MySQL to Sql Server, but never got the time to do it. Sometimes a project doing similar things can serve as a launchpad for this endeavour, but that never came along, at least not yet. I am very intere...
more Quick note on innodb_file_per_tableFrom: bigdbahead.com
Post Date: 2008-03-03 20:03:45
Ran into an interesting issue with a client today who was using innodb_file_per_table. This client had a lot of tables ( 300K+), they were using innodb_file_per_table. Today they had a problem that caused their db to crash. After fixing their issue, the database restart seemed to hang. The only thing in the error log was the mysql was started, their was no crash recovery messages. An strace revealed that the mysqld process was stating all the datafiles. It seems that during a reco...
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