Chris, ----- Original Message ----- From: "Chris Nolan" <[EMAIL PROTECTED]> To: "Heikki Tuuri" <[EMAIL PROTECTED]> Cc: <[EMAIL PROTECTED]> Sent: Thursday, February 12, 2004 2:26 PM Subject: Re: InnoDB Hot Backup + MySQL embedded?
> Dear Heikki, > > Thanks for the quick response! It never ceases to amaze me that such > compartively small teams at Innobase Oy and MySQL AB produce such > incredibly high-quality software. thank you for the praise :). > Being a final-year Software Engineering student, I'm curious as to what > you consider the most difficult problem to solve in building InnoDB and > ibbackup has been. Of technical matters, multiversioning (consistent read) has been the most difficult to get working reliably. I wrote it probably around 1996, and still last year a bug was found in it. Adaptive hash indexes and the insert buffer have also been difficult to debug. The reason is obvious: in these 3 things parallel execution of threads as well as background cleanup operations complicate things. One-threaded, deterministic processing is much easier to debug than multithreaded nondeterministic execution. > Given the fact that you set your goals extremely high > for InnoDB (and have acheived them quite handily), I want to ensure > that if anything remotely similar comes up in my final-year project that > I either put my hand up for it and take on the challenge or run > screaming in the other direction and have a somewhat easier year. In academic circles it is best not to put too much emphasis on programming work :). Referees tend to favor papers written in plain English, and want algorithms in pseudocode. They are not willing to dive into the full complexity of a real-world implementation. There has been quite a lot of debate and criticism around this gap between typical university research and practical applications, but things will probably not change in the next 2500 years. > Regards, > > Chris Best regards, Heikki > Heikki Tuuri wrote: > > >Chris, > > > >----- Original Message ----- > >From: "Chris Nolan" <[EMAIL PROTECTED]> > >Newsgroups: mailing.database.myodbc > >Sent: Thursday, February 12, 2004 2:45 AM > >Subject: InnoDB Hot Backup + MySQL embedded? > > > > > > > > > >>Hi all, > >> > >>I'm looking at developing an (open source) server-style application with > >>the embedded MySQL library to be employed as the primary data store. > >> > >>Has anyone attempted to use InnoDB Hot Backup for such a beast? I ask as > >>I do not know whether communication between ibbackup and the database > >>engine is required (thus requiring a few changes to the embedded lib > >>before compilation). A quick scan through the docs involved doesn't seem > >>to point me in the right direction for a definitive answer on this. > >> > >> > > > >ibbackup can be used with the MySQL Embedded Server Library, no problem in > >that. ibbackup does not communicate with the mysqld server at all. It just > >reads the InnoDB data and log files. > > > >On the other hand, the innobackup Perl script does start a mysql connection > >to the server. > > > > > > > >>Regards, > >> > >>Chris > >> > >> > > > >Best regards, > > > >Heikki Tuuri > >Innobase Oy > >http://www.innodb.com > >Foreign keys, transactions, and row level locking for MySQL > >InnoDB Hot Backup - a hot backup tool for InnoDB which also backs up MyISAM > >tables > > > >Order MySQL technical support from https://order.mysql.com/ > > > > > > > > > > -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
