We are pleased to announce the release of High Availability Cluster software for OpenSolaris 2009.06! If you've been following along, this release is the fruit of project Colorado. Open HA Cluster 2009.06 is based on Solaris Cluster 3.2, including many of the features from the most recent update. Additionally, Open HA Cluster 2009.06 contains the following new features:

• The ability to use Crossbow VNICs as …

We are pleased to announce the release of High Availability Cluster software for OpenSolaris 2009.06! If you've been following along, this release is the fruit of project Colorado. Open HA Cluster 2009.06 is based on Solaris Cluster 3.2, including many of the features from the most recent update. Additionally, Open HA Cluster 2009.06 contains the following new features:

• The ability to use Crossbow VNICs as …

This Thursday (May 28th, 14:00 UTC), Lars Thalmann will give a MySQL University session on MySQL Replication: Walk-through of the new 5.1 and 6.0 features. (This session was originally scheduled for May 7th, but had to be put off due to technical problems. Apologies.) Lars is leading the replication and backup teams at MySQL, so this is one of the best opportunities to ask whatever questions you might have about new replication features in MySQL.

For MySQL University sessions, point your browser to this page. You need a browser with a working Flash plugin. You may register for a Dimdim account, but you don't have to. (Dimdim is the …

Following on the heels of our memcached performance tests on SunFire X2270 ( Sun's Nehalem-based server) running OpenSolaris, we ran the same tests on the same server but this time on RHEL5. As mentioned in the post presenting the first memcached results, a 10GBE Intel Oplin card was used in order to achieve the high throughput rates possible with these servers. It turned out that using this card on linux involved a bit of work resulting in driver and kernel re-builds.

• With the default ixgbe driver from the RedHat distribution (version 1.3.30-k2 on kernel 2.6.18)), the interface simply hung during the benchmark test.
• This led to downloading the driver from the Intel site (1.3.56.11-2-NAPI) and re-compiling it. This version does …

Following the launch of the Open Database Alliance some people have assumed that it is only a matter of time before MariaDB becomes the de facto replacement for MySQL.

That assumes that Oracle will allow the development of MySQL to stagnate, either deliberately or through neglect - something that we have expressed our doubts about, but even if that were the case it appears that the GPL (or more to the point MySQL’s dual licensing strategy) may restrict the potential for MariaDB.

Curt Monash recently raised the question of whether closed-source storage engines can be used with MySQL (and, by …

Following on the heels of our memcached performance tests on SunFire X2270 ( Sun's Nehalem-based server) running OpenSolaris, we ran the same tests on the same server but this time on RHEL5. As mentioned in the post presenting the first memcached results, a 10GBE Intel Oplin card was used in order to achieve the high throughput rates possible with these servers. It turned out that using this card on linux involved a bit of work resulting in driver and kernel re-builds.

• With the default ixgbe driver from the RedHat distribution (version 1.3.30-k2 on kernel 2.6.18)), the interface simply hung during the benchmark test.
• This led to downloading the driver from the Intel site (1.3.56.11-2-NAPI) and re-compiling it. This version …

Following on the heels of our memcached performance tests on SunFire X2270 ( Sun's Nehalem-based server) running OpenSolaris, we ran the same tests on the same server but this time on RHEL5. As mentioned in the post presenting the first memcached results, a 10GBE Intel Oplin card was used in order to achieve the high throughput rates possible with these servers. It turned out that using this card on linux involved a bit of work resulting in driver and kernel re-builds.

• With the default ixgbe driver from the RedHat distribution (version 1.3.30-k2 on kernel 2.6.18)), the interface simply hung during the benchmark test.
• This led to downloading the driver from the Intel site (1.3.56.11-2-NAPI) and re-compiling it. This version …

A software-based distributed caching system such as memcached is an important piece of today's largest Internet sites that support millions of concurrent users and deliver user-friendly response times. The distributed nature of memcached design transforms 1000s of servers into one large caching pool with gigabytes of memory per node. This blog entry explores single-instance memcached scalability for a few usage patterns.

Table below shows out-of-the-box (no custom OS rewrites or networking tuning required) performance with 10G networking hardware and one single-socket UltraSPARC T2-based server with 8 cores and 8 threads per core (64 threads on a chip). All runs are done with a single memcached instance and 40 worker threads so that about 3 cores (24 threads) are used for the critical networking stack that is also heavily parallelized. 40+24 threads is a nice balance for this …

A software-based distributed caching system such as memcached is an important piece of today's largest Internet sites that support millions of concurrent users and deliver user-friendly response times. The distributed nature of memcached design transforms 1000s of servers into one large caching pool with gigabytes of memory per node. This blog entry explores single-instance memcached scalability for a few usage patterns.

Table below shows out-of-the-box (no custom OS rewrites or networking tuning required) performance with 10G networking hardware and one single-socket UltraSPARC T2-based server with 8 cores and 8 threads per core (64 threads on a chip). All runs are done with a single memcached instance and 40 worker threads so that about 3 cores (24 threads) are used for the critical networking stack that is also heavily parallelized. 40+24 threads is a nice balance for this …