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Questions tagged [dbm]

DBM is a simple UNIX database format. It uses a key-value storage and hashing for fast retrieval of the data by key.

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android - detect low network signal, which value to rely on

I want to detect a situation where the user is somewhere with low reception (low network signal) for an amount of time (5 minutes for example), and I am wondering what value to rely on. What I have now is: public class RadiationTest { …
Ofek Agmon
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How to properly tie a hash with DBM::Deep to avoid memory leaks?

I am doing a graph analysis of some very large data and I need to store all the scores for a particular set of graph edges. Given the size of the data, I need to write the information to disk and I'm trying to use a tied hash with DBM::Deep. Here is…
SES
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Ruby connection closed (DRb::DRbConnError)

I am experiencing a really weird behaviour with Ruby DRb or maybe the problem is dbm. I am using the dbm database with a server, and a client that makes the requests via DRb. Here's the method with the problem (the database connection is ok) and it…
dabadaba
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Apache Rewrite map fails to process lines in map after certain point

We have the following rewrite map setup in our apache config: RewriteEngine on RewriteMap modernmap txt:/etc/apache2/maps/salon/www.modernmap.com.txt RewriteCond ${modernmap:$1|NOT_FOUND} !NOT_FOUND RewriteRule ^(.+) ${modernmap:$1} [R=301,L] The…
user3745855
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get SignalStrength in dbm

I would like to show the the signal strength in dbm. But with my code i always become the result -1. But when i see the signal strength in the settings it's around -81.. Can you find a mistake? thank you! public class MainActivity extends Activity…
user3379235
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Reading perl flat file db with php

I have an old flat file perl db that's part of an eCommerce site I want to migrate to a new php application. Is it possible to read with php the "table" files have no file extension and seem not be just csv's or similar?
Louise McMahon
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How do I access random element in a Perl DBM hash?

I have a Perl DBM hash containing a list of URLs that I want to pick randomly from to load balance spidering sites. As a result I want to pick a key at random, or select the nth element (so I can randomise n). I'm aware this goes against the…
Paul
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Why when using DBM with Ruby, db[1] = 2 is ok, but print db[1] will give error?

On Ruby, when using DBM require "dbm" db = DBM.open("somedata") db[1] = 2 # ok p db[1] # gives error does anyone know db[1] = 2 is ok, but printing out db[1] will give error? If it requires db["1"] to be valid, then how come it doesn't apply…
nonopolarity
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sqlite with Python is unreasonably slow compared to anydbm

My goal is to create a database of MD5 hashes, and then check another list of hashes against it to see if they exist in the database. I have a working solution using anydbm, which if you are unfamiliar works exactly like a dictionary in python, but…
user1442389
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moving a perl script/dbm to a new server, and shifting out of dbm?

I've been tasked with mirroring a site onto a new server. The old site has a few Perl scripts that, as far as I can see internally (i know nothing about Perl, though I have a pretty good understanding of coding generally, and specifically…
dama_do_bling
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How to empty DBM file in Python efficiently?

There is a command in DBM module to delete the value stored at a key. del d[key] # delete data stored at key (raises KeyError # if no such key) But I cannot even iterate with this command, because the Runtime error occurs.(RuntimeError:…
Sashko Kopyl
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Tokyo Cabinet and cygwin

I am trying to install Tokyo Cabinet under Windows Cygwin but when I run ./configure I get the following error: configure: error: regex.h is required
user1845360
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DBM::Deep not working with perl hash reference

I am using a DBM::Deep hash object like so: my $dbm = DBM::Deep->new( file => "dbm.db", locking => 1, autoflush => 1, type => "DBM::Deep->TYPE_HASH", ); #code.. $dbm = $hash_reference; However,…
srchulo
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DBM::Deep unexplained errors

So I am using DBM::Deep to share data between different forked processes. I set up my DBM::Deep object like this: my $todo = DBM::Deep->new( file => "urls.db", locking => 1, autoflush => 1, type =>…
srchulo
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Ideal string length for DBM database?

When using a DBM database (e.g. Berkeley or GDBM), is it better to store data using fewer long strings or more short strings? I can easily structure my data either way. I'm looking for 'better' in the performance sense, but I'm interested in other…
dhowland
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