Ideas, releases, practical guides, and perspectives from the people building with MySQL.
MySQL AB today announced that it plans to release alpha and beta versions of several new Free and Open Source Software (FOSS) products this month, including a 'release candidate' of MySQL 5.1 -- a major new upgrade of the world?s most popular open source database server.
The announcement was made this morning at the inaugural Japanese MySQL Users Conference being held here this week.
MySQL is today releasing a new ODBC driver, under the version number ODBC 5.1. It is a partial rewrite of the the original MyODBC 3.51 code base, originally developed by Monty and Venu Anuganti, including individual parts of the current 65K ODBC 5 code base. It is designed to work with all MySQL versions starting with MySQL 4.1.
The original ODBC 3.51 driver was incomplete and admittedly somewhat of a quick hack, containing some debatable code. For that reason, Connector/ODBC 5 started as a complete rewrite. After 2 years it had 65 KLOC, but no tests and was in part overdesigned. That project was started but never finished, and had some deep Qt dependencies.
In the meantime, the original ODBC 3.51 has had 6 new releases and over 200 bugs fixed. As for ODBC 5.1, debatable parts of the code have been …
[Read more]MySQL Proxy 0.6.0 has been tagged and should hit the mirrors near you pretty soon.
In the last 3 month of development we added a lot more features to the proxy-core which should bring the proxy closer to your needs. As always the proxy is transparent to your application, no requirement for a special language, no special needs for a platform and all customizable for your needs.
The most powerful feature is Read/Write Splitting which allows you to scale a application which is unaware of replication automaticly cross several slaves without changes to your application. Instance Scale Out we say.
The Proxy also became a 1st class citizen in the MySQL world …
[Read more]Version 1.5.0 of the innotop MySQL and InnoDB monitor is out. This release is the first in the unstable 1.5.0 branch, which will eventually become the stable 1.6 branch. I'm beginning to merge the various branches I've made to support some of our needs at my employer. This first release adds some major new features and prepares for some other large improvements and new features.
As a quick follow up to the last post on malloc() speed comparisons, I decided to extend the size out a bit to cover malloc()ing up to 500M.
Time for 128k: 0.035259 Time for 256k: 0.009718 Time for 1M: 0.478129 Time for 5M: 0.968945 Time for 10M: 0.965172 Time for 50M: 0.674316 Time for 500M: 1.018901
As you can see, once you make the jump up to mmap() (>256k), the cost is fairly well constant (give or take fluctuations). So it’s not that huge memory buffers are terrible, just that there is a cost difference between the smaller and larger buffer sizes that may or may not matter in your case.
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The recent read_buffer issue got me curious, so I hacked up a quick (ugly) test program to see if I could show the different speeds of malloc()ing different buffer sizes. Here’s the test code:
[C]
#include
#include
#include
#define LOOP 10000
int main(void) {
int x[4] = { 128,256,1024,5*1024 } ;
int f = 0;
for(f=0;f<4;f++) {
int val = x[f];
timeval before;
timeval after;
gettimeofday(&before,0);
int loop=0;
for(loop=0;loop after.tv_usec) {
udiff = (float)(after.tv_usec + 10000000 -
before.tv_usec)/10000000.0;
diff = after.tv_sec - 1 - before.tv_sec;
} else {
udiff = (float)(after.tv_usec - before.tv_usec)/1000000.0;
diff = after.tv_sec - before.tv_sec;
}
printf(”Time for %dk:\t%f\n”,val,((float)diff+udiff));
}
return 0; …
[Read more]Our parent site InfoWorld has just announced it's 36 winners for this year's Best of Open Source Awards. Selected by InfoWorld Test Center editors and reviewers, these first annual Bossies celebrate the best open source software available for the enterprise. From CRM and ERP to OSes and middleware to networking, storage, and security software, our 36 winners prove that if your business is willing and your IT staff is ready, there's an open source solution that's able. Check out the winners: Apps Networking Platforms Security Software Storage Disclosure: MySQL and MuleSource both won, but Zack and I had nothing to... READ MORE
MySQL Bug Tracker
I realize that MySQL is in a transitional phase making it’s development more transparent to the community so this entry isn’t really a rant but something that will hopefully ease the transition. The public MySQL bug tracker doesn’t seem to have any way to view the history of status changes to a bug. Things like changing a bug from open to inactive. I assume there will always be things that should be hidden from bugs like links to sites internal to MySQL AB but things like simple status changes should be visible to the public.
For example on this Bug #20358 Heikki posted a comment that he was moving the bug from open to unable to repeat. Did he actually make the change? I have no idea because I can’t access the status log. Was it ever changed from unable to repeat back to open or verified? Again I have no idea…
Another …
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another month, another release of connector/odbc 3.51. there?s
not a lot of bug fixes in this one, but we did manage to get
the bug count under 80 bugs.
the reason there were fewer bug fixes in the release of 3.51.20
(other than there being fewer bugs to fix) was that we have been
hard at work on connector/odbc 5.1.0, which builds on the 3.51
foundation to bring new functionality like unicode and descriptor
support. there are more features planned, and you can see
the
release announcement for details. i hope that we?ll be able
to keep on releasing new versions of 3.51 and 5.1 on …