This isn't a question, just more seeking expert advice. What's the optimal level of concurrency that the C++ implementation of BerkeleyDB can reasonably support? How many threads can I have hammering away at the DB before throughput starts to suffer because of resource contention? I've read the manual and know how to set the number of...
I'm trying to read through the documentation on Berkeley DB XML, and I think I could really use a developer's blog post or synopsis of when they had a problem that found the XML layer atop Berkeley DB was the exact prescription for. Maybe I'm not getting it, but it seems like they're both in-process DBs, and ultimately you will parse you...
I need a database that could be stored network drive and would allow multiple users (up to 20) to use it without any server software. I'm considering MS Access or Berkeley DB. Can you share your experience with file databases? Which one did you use, did you have any problems with it? ...
I have a set of Berkeley DB files on my Linux file system that I'd like to examine. What useful tools exist for getting a quick overview of the contents? I can write Perl scripts that use BDB modules for examining them, but I'm looking for some CLI utility to be able to take a look inside without having to start writing scripts. ...
Hi, I need a pure .Net persistent hashtable/binarytree, functionally similar to berkeley-db Java edition. Functionally it should opperate in a similar maner to a DHT such memcached and velocity etc but it doesn't have to be distributed. In essence I am looking for a persistent hashtable. Does anyone have any ideas or suggestions? A ...
I've got a Subversion repository, backed by the berkeley DB. Occasionally it breaks down due to some locks and such not being released, but this morning it was impossible to recover it using the 'svnadmin recover' command. Instead it failed with the following error: svnadmin: Berkeley DB error for filesystem 'db' while opening 'nodes' t...
I have problems opening a berkeley db in python using bdtables. As bdtables is used by the library I am using to access the database, I need it to work. The problem seems to be that the db environment I am trying to open (I got a copy of the database to open), is version 4.4 while libdb is version 4.6. I get the following error using bs...
Hi, I have a berkeley db file (*.bdb) which is created by the C implementation(python bsddb module). Is it possible to read this file by a pure java implementation of Berkeley Db? I tried to read it using berkeley db java edition (je) but could not. je throws out an exception saying that it could not detect the berkeley database. Are be...
I'm looking for a dbm-like library that I can use in place of Berkeley DB, which I'm currently using. My main reason for switching is the licensing fees for BDB are pretty high (free for open source apps, but my employer does not want to open source this particular app for various reasons). I've looked briefly at qdbm but it doesn't loo...
I'm trying to find out where a BerkeleyDB PPM is for ActivePerl 5.10. Anyone have a clue where to find this, or how to build it? I had found a lead here. They claim BerkeleyDB 0.33 had built ok for Perl 5.10. They provide a link to the PPM, but not to the supporting zip file. So I got around it, manually getting the ppm and the zip and ...
I'd like to be able to get all the key-values stored in a Berkeley DB using the Ruby bindings from http://github.com/mattbauer/bdb/tree/master but I'm not sure how to proceed. Any pointers will be appreciated. UPDATE Here's a small script that loops over the keys and prints them. Based on Pax' answer: require 'rubygems' require 'bdb' ...
I'm looking for general experiences from people who have used both, particularly on how the two compare on handling large numbers of records, transaction/concurrency/deadlock handling, and juicy stories about database corruption and backup procedures. ...
I've spent hours searching for examples of how to use the bsddb module and the only ones that I've found are these (from here): data = mydb.get(key) if data: doSomething(data) ##################### rec = cursor.first() while rec: print rec rec = cursor.next() ##################### rec = mydb.set() while rec: key, val = r...
My googlefu is lacking tonight and I can't find an answer to this. Will databases I create on a amd64/emt64 system be usable on a x86 system? ...
Do the following on the default Python install on Mac OS X 10.5 (Leopard) w/ Developer Tools: noel ~ : python Python 2.5.1 (r251:54863, Jan 13 2009, 10:26:13) [GCC 4.0.1 (Apple Inc. build 5465)] on darwin Type "help", "copyright", "credits" or "license" for more information. >>> import bsddb Traceback (most recent call last): File "<s...
Hi I am stuck while making a programming decision, I am a .Net developer, I am currently building an application for my client that receives data from a third party application, it has to then perform operations on the values and send it to a webservice/servlet which then displays data to a webpage, The catch here is that the data bein...
I am using Berkely DB and I have an error which says that mutations are missing. What does this mean? Exception: com.sleepycat.persist.evolve.IncompatibleClassException: Mutation is missing to evolve class: TopMoveDAO.TopMoveClass version: 0 Error: java.lang.ClassNotFoundException: TopMoveDAO.TopMoveClasscom.sleepycat.persist.evolve.Inc...
I am getting the following stack trace. Just want to know what your first impression is. Does it seem to be saying that Vectors cannot be saved to the Berkeley DB. What else can I provide you with, that will help work this out. Exception in thread "Timer-0" java.lang.IllegalArgumentException: Class could not be loaded or is not persiste...
I have no idea how I would set up a BerkelyDB database in a Ruby or Rails project. Does anyone have any experience configuring one, that they could talk about? Maybe using ActiveRecord or Datamapper? ...
BerkeleyDB is the database equivalent of a Ruby hashtable or a Python dictionary except that you can store multiple values for a single key. My question is: If you wanted to store a complex datatype in a storage structure like this, how could you go about it? In a normal relational table, if you want to represent a Person, you create ...