[B! database][Database] IanLewisのブックマーク

IanLewis id:IanLewis

databaseとDatabaseに関するIanLewisのブックマーク (41)

redis導入後にトラブル発生、そのレポート
こんにちわ、ミツバチワークス stoneです。今回は、redisシリーズ第３弾、実際にredisをサービスの投入してみて、うまく行かなかった事例についてご紹介します。 redisの使用用途今回、いくつかあるセッションデータのうち２つをMySQLからredisへ移行させました。これらのセッションデータ、MySQL上では、セッションIDの他に複数のカラムから構成されているのですが、redis上では、この複数のカラムをserialize()して、 key(string) => value(string) という形で格納するようにしました。ちゃんとソースコードで確認はしていないのですが、memcachedでも、TTLが設定できますが、TTLを過ぎたデータを監視してクリアしていないですよね。また、memcached内部のslabの構成次第では、TTLまでデータが保持されずに、データがクリア
IanLewis 2010/11/01
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redis

database
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GitHub - twitter-archive/gizzard: [Archived] A flexible sharding framework for creating eventually-consistent distributed datastores
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IanLewis 2010/04/07
A framework for creating distributed datastores.

distributed

database

middleware

twitter
リンク
ZODB - a native object database for Python — ZODB documentation
ZODB - a native object database for Python Because ZODB is an object database: no separate language for database operations very little impact on your code to make objects persistent no database mapper that partially hides the database. Using an object-relational mapping is not like using an object database. almost no seam between code and database. Relationships between objects are handled very
IanLewis 2010/02/21
The Zope Object Database (ZODB) provides seamless object persistence in Python. It gets rid of requiring a relational database for your object-oriented application and provides you with a powerful and safe object store: persistence, transactions, scalability, and more.

python

zope

zodb

database

object-database
リンク
Bitmap index - Wikipedia
On the left, Identifier refers to the unique number assigned to each resident, HasInternet is the data to be indexed, the content of the bit map index is shown as two columns under the heading bit maps. Each column in the left illustration under the Bit maps header is a bit map in the bit map index. In this case, there are two such bit maps, one for "has internet" Yes and one for "has internet" No. It i
IanLewis 2010/02/11
A bitmap index is a special kind of database index that uses bitmaps. Bitmap indexes have traditionally been considered to work well for data such as gender, which has a small number of distinct values, e.g., male and female, but many occurrences of those values.

index

bitmap

algorithms

data-structure

database
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World Government Data | guardian.co.uk
Angela Rayner: Tories’ council fund is cynical pre-election sticking plaster Exclusive: Labour ‘under no illusions’ about mess party stands to inherit, as council leaders warn more will go bust next year
IanLewis 2010/01/25
Governments around the globe are opening up their data vaults â allowing you to check out the numbers for yourself. This is the Guardianâs gateway to that information. Search for government data here from the UK (including London), USA, Australia and New Zealand â and look out for new

database

international

guardian

newspaper

government

research
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UCI Machine Learning Repository
Welcome to the UC Irvine Machine Learning Repository We currently maintain 668 datasets as a service to the machine learning community. Here, you can donate and find datasets used by millions of people all around the world!
IanLewis 2010/01/19
We currently maintain 187 data sets as a service to the machine learning community. You may view all data sets through our searchable interface.

dataset

machine

machine-learning

database

reference

statistics

research

datamining
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GitHub - ondras/wwwsqldesigner: WWW SQL Designer, your online SQL diagramming tool
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IanLewis 2009/12/07
WWW SQL Designer allows users to create database designs, which can be saved/loaded and exported to SQL scripts. Various databases and languages are supported. Ability to import existing database design.

sql

database

tools

mysql

opensource

javascript
リンク
MySQL
MySQL HeatWave MySQL HeatWave is a fully managed database service for transactions, real- time analytics across data warehouses and data lakes, and machine learning services, without the complexity, latency, and cost of ETL duplication. It is available on OCI, AWS, and Azure. Learn More » MySQL Enterprise Edition The most comprehensive set of advanced features, management tools and technical suppo
IanLewis 2009/11/14
MySQL Proxy is a simple program that sits between your client and MySQL server(s) that can monitor, analyze or transform their communication. Its flexibility allows for unlimited uses; common ones include: * load balancing * failover * query analysis * query filtering and modification * ... and many

mysql

proxy

database

scalability

cluster

performance

failover
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SkypeGarage/DbProjects/PlProxy - Skype Developer Zone
1. Overview PL/Proxy is a proxy language used for remote database procedure calls and data partitioning between databases based on hashing field values. Main idea is that proxy function will be created with same signature as remote function to be called, so only destination info needs to be specified inside proxy function body. Downloads: http://pgfoundry.org/projects/plproxy 2. Documentation Tut
IanLewis 2009/11/14
PL/Proxy is a proxy language used for remote database procedure calls and data partitioning between databases based on hashing field values. Main idea is that proxy function will be created with same signature as remote function to be called, so only destination info needs to be specified inside pro

proxy

database

tools

postgresql

scalability

scaling

skype
リンク
MySQL Master-Slave Replication
Friday, September 7, 2007 MySQL Master-Slave Replication When you have a MySQL database and want to spread the load across multiple servers, you can setup replication. What this does is in almost-realtime copy all commands from the master server to the slave server, keeping the data the same on both servers so both servers can serve requests simultaneously, sharing the load. This is NOT a good sys
IanLewis 2009/11/09
When you have a MySQL database and want to spread the load across multiple servers, you can setup replication. What this does is in almost-realtime copy all commands from the master server to the slave server, keeping the data the same on both servers so both servers can serve requests simultaneousl

mysql

slave

master

replication

database

db
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Amazon Relational Database Service (Amazon RDS)
Amazon Relational Database Service Easy to manage relational databases optimized for total cost of ownership Amazon Relational Database Service (Amazon RDS) is an easy-to-manage relational database service optimized for total cost of ownership. It is simple to set up, operate, and scale with demand. Amazon RDS automates the undifferentiated database management tasks, such as provisioning, configur
IanLewis 2009/10/27
Amazon Relational Database Service (Amazon RDS) is a web service that makes it easy to set up, operate, and scale a relational database in the cloud. It provides cost-efficient and resizable capacity while managing time-consuming database administration tasks, freeing you up to focus on your applica

amazon

mysql

database

aws

EC2

rds
リンク
Google Code Archive - Long-term storage for Google Code Project Hosting.
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IanLewis 2009/10/23
Redis is a key-value database. It is similar to memcached but the dataset is not volatile, and values can be strings, exactly like in memcached, but also lists and sets with atomic operations to push/pop elements.

database

storage

scalability

redis

memcached

db

performance
リンク
GitHub - driftx/Telephus: Telephus is a connection pooled, low-level client API for Cassandra in Twisted python.
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IanLewis 2009/09/30
Telephus is a connection pooled, low-level client API for Cassandra in Twisted python.

cassandra

python

twisted

database

client
リンク
DBSlayer - Trac
DBSLAYER The DBacesslayer aka DBSlayer aka Släyer (as we like to call it when we're feeling ironically heavy metal) is a lightweight database abstraction layer suitable for high-load websites where you need the scala ble advantages of connection pooling. Written in C for speed, DBSlayer talks to clients via JSON over HTTP, meaning it's simple to monitor and can swiftly interoperate with any web fra
IanLewis 2009/09/25
The DBacesslayer aka DBSlayer aka SlÃ¤yer (as we like to call it when we're feeling ironically heavy metal) is a lightweight database abstraction layer suitable for high-load websites where you need the scalable advantages of connection pooling. Written in C for speed, DBSlayer talks to clients vi

database

json

mysql

http

loadbalancing
リンク
Percona Toolkit
All of Percona’s open source software products, in one place, to download as much or as little as you need.
IanLewis 2009/09/25
Maatkit makes MySQL easier and safer to manage. It provides simple, predictable ways to do things you cannot otherwise do. It would be nice if these features were included with MySQL, but they are not. That's why Maatkit is now shipping by default with many GNU/Linux distributions such as Debian and

mysql

tools

database

sysadmin

performance

replication

tuning
リンク
MongoDB 3.0.8 is released - MongoDB Blog
General InformationDocumentationDeveloper Articles & TopicsCommunity ForumsBlogUniversity
IanLewis 2009/09/25
Mongo (from "humongous") is a high-performance, open source, schema-free document-oriented database. MongoDB is written in C++ and offers the following features: * Collection oriented storage: easy storage of object/JSON -style data * Dynamic queries * Full index support, including on inner objects

database

distributed

db

mongodb

scalability
リンク
pytyrant - Google Code
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IanLewis 2009/09/24
pytyrant is a pure python client implementation of the binary Tokyo Tyrant protocol. Tokyo Cabinet http://tokyocabinet.sourceforge.net/ is a "super hyper ultra database manager" written and maintained by Mikio Hirabayashi and released under the LGPL.

python

tokyocabinet

tokyotyrant

client

database

storage
リンク
http://en.startups-japan.com/
IanLewis 2009/09/24
Startups JAPAN is the database which gathered the information of the Japanese dosmetic venture companies (enterprises). Information is transmitted in 3 languages (English and Chinese in addition to Japanese) on this site.

japan

reference

database

directory

startup

finance

internet
リンク
Google Code Archive - Long-term storage for Google Code Project Hosting.
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IanLewis 2009/09/01
These Cacti templates extract and graph a huge variety of information about MySQL and other components of a LAMP application, giving you very detailed insight into your server's performance over time.

mysql

cacti

monitoring

sysadmin

performance

database

tools

templates
リンク
Google Code Archive - Long-term storage for Google Code Project Hosting.
IanLewis 2009/07/11
Logs Django exceptions to your database handler.

django

logging

python

database

debug

middleware
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