Before I go much farther talking about the BPlusTree I want to address one thing. Does the BPlusTree support ACID operations? (definitions below from wikipedia) Atomicity Atomicity requires that database modifications must follow an “all or nothing” rule. Each transaction is said to be atomic. If one part of the transaction fails, the entire transaction [...]
Oct 122011
Sep 272011
If you’ve missed it there is great article entitled Keep it secret, keep it safe by Eric Lippert. Essentially it attempts to dissect the essence of typical crypto issues in plain English (i.e. crypto for dummies). He did a great job of explaining the difficulties in key management, worth a read. I found it particularly [...]
Yes this site is still using wordpress, in fact, I’m writing this in wordpress right now. The interesting thing is I’ve completely uninstalled wordpress and MySql from my production server. I know crazy huh? So if I’ve peaked your curiosity you’ll want to stay tuned. Right now I don’t have time for a lot of details, [...]
Sep 272011
A very minor update to the library this past weekend. Addition of Cyrpto.SecureTransfer to provide file transfers via shared public keys. The Crypto.AESCryptoKey now has ToArray() and FromBytes() like other keys. HashStream can now aggregate read/write calls to actual storage stream while computing the hash. The Crypto.Hash class received a new method, Combine(…) Html.XmlLightElement and [...]
Last year I ran across this 2009 post by Bruce Schneier entitled “Another New AES Attack“. It got me thinking about and dissecting the Rijndael algorithm which most of you know as AES (Advanced Encryption Standard). This research surprised me, I found that AES has only three variants. These variants are best known by their key [...]
The help site doesn’t suck as bad as did before. Make me feel better and take a look: http://help.csharptest.net/ I’ll know if you don’t. So I finally gave up on my last effort at getting help automated. To recap my struggle: basically Sandcastle, the original help system I used, was a complete flop. I spent [...]
Apr 262011
Cont’d from Building a database in C# – Part 2 Caching and persistence seem to go hand-in-hand for this adventure. With the cost of serialization and IO it’s just not possible to get anything to perform well without a little caching. The questions I had around caching is really more along the lines of “how” [...]
Apr 212011
Well I went looking around for an XSD schema that could validate XML comments I place in code for documentation. Either Microsoft never delivered one, or I completely failed to find it. Amazing that I found many people looking for it, but nobody willing to write it. So I did, you can get it here: [...]
Mar 232011
Cont’d from Building a database in C# – Part 1 So with the B+ tree semantics out of the way it was time to start looking at what was missing. Obviously it was all in memory and not yet on disk, and once it is on disk I’ll certainly need to cache. Yet there was [...]
Mar 142011
Ok, so for the last week or two I’ve been off on an adventure of sorts with persistent media data structures. At first I was like “Surely a good solution exists?” this isn’t a new problem. Unfortunately I was unable to locate any solutions that were open source (non-GPL) and written entirely in managed code. [...]