BaseX Questions..
Monday, 18 January 2010 · 1 message
CG
Christian Grün18 Jan 2010 22:17 #
Dear Tyler,
you might also be interested in looking into the following
lecture/seminar slides:
http://www.inf.uni-konstanz.de/dbis/teaching/ws0708/xml/24-Native.pdf http://www.inf.uni-konstanz.de/dbis/teaching/ws0708/dbissem/BaseXInside.pdf
Apart from that and the listed publications..
http://www.inf.uni-konstanz.de/dbis/basex/publications.php
we cannot provide you with more details on our implementation (yet). Basically, we are storing all data in a flat table representation. Table entries take 16 bytes each, and all entries are stored in blocks of 4kb, the order of which is referenced by a main memory directory. The nodes' pre values serve as node ids, which are unique during a single update transaction.
If you need to know more, feel free to ask.
Best,
Christian
FYI: I've forwarded this mail to the basex-talk mailing list.
Quoted text · Tyler Corbin · 44 lines
On Mon, Jan 18, 2010 at 4:21 PM, Tyler Corbin <094568c at acadiau.ca> wrote: > I don’t know if you can disclose this type of information – But I’m really > interested in the type of structures you’ve implemented for your BaseX and > how you achieved such quick updating and querying time. I’m doing some heavy > research into how different native XML Databases go about this, and it seems > BaseX is near the top (On performance). > > Do you have a more recent publication, which covers on how you go about > updating XML Structures? I’ve read one of your more recent publications on > your Database Architecture and some other things... but it doesn’t really > touch on your implementation of updates. > > > > - Since you don’t update the index structures for single updates, > do you have some type of “pending list” where all updates that are not > officially added to the index structures can still be accessed by the > processor? If not, can you briefly explain the data structure (if allowed)? > > - Also, how much compression do you get when your Database > Architecture is performed? > > > > > > I also have a few more questions, but I’m positive your recent publication > covers it. > > > > Thank you for your time! > > ~ Tyler > > > > > > > > > >
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