Trying to integrate BouncyCastle Cryptography provider in Java can be a nightmare. I read a lot of forums messages about “JCE cannot authenticate the provider BC” and I didn’t find any clear response. After several hours of tweaking and digging I found the main reason of the problem. If you want to use BouncyCastle as Security provider then install it directly on your Java Virtual Machine and remove any library of bc from your application.

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In my experiments with databases I was constrained to tune the system together with the databases. A system what will run a database is quite different from any other server system, because databases put a lot of stress on the IO and especially on the disks (probably the file servers too). Hardware is not all you should tune your system as much as possible. In this post I will talk about Linux with Ext3 (is what I have right now), but on future I will test OpenSolaris with ZFS.

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On the Linux market are a lot of distributions and every distribution is unique in his way. Is normal to have different compilers and tools from distribution to distribution so is almost normal to have programs what doesn’t compile on all distributions. sysbench 0.4.12 is one of them.

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For me one of the most annoying thing from VMware is the VMware Infrastructure Client, because it doesn’t support Linux. Every-time when I want to manage some machines, or I want to see the IP/Status/etc of some machines, I need to log on on some Windows Server and run the VMware Infrastructure Client from there. Because I’m running exclusively on Linux (Debian 5.0.1 Lenny) on my workstation, this can be very annoying. Anyway, VMware VirtualCenter is exposing to us a set of web services who can control your VMware ESX …

We are living interesting times … MySQL was first purchased by SUN and now SUN was purchased by ORACLE. I don’t know what future will reserve for MySQL, but in this moment it seems MySQL is coming very very close to PostgreSQL. We are NOT talking about MySQL with MyISAM, we are talking about MySQL with InnoDB, because I’m directly interested in a set of properties what PostgreSQL already have them built-in and MySQL achieve them through InnoDB (and the new Maria Data plugin). This properties are Atomicity, Consistency, Isolation, Durability = ACID, in other words, very stable, good integrity and crash proof database. Why an ACID database? Sometimes we are more interested in ACID for our data than raw speed. For example do you keep your savings to a bank who is running a NON ACID database? I think you understand my concern.