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• google Bigtable

  - by user309944

  I know how to table in google BigTable.I have one doubt regarding this.what are all the datatype supported by google BigTable. Thanks in advance

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• Designing persistence schema for BigTable on AppEngine

  - by Vitalij Zadneprovskij

  I have tried to design the datastore schema for a very small application. That schema would have been very simple, if not trivial, using a relational database with foreign keys, many-to-many relations, joins, etc. But the problem was that my application was targeted for Google App Engine and I had to design for a database that was not relational.…

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• bigtable vs cassandra vs simpledb vs dynamo vs couchdb vs hypertable vs riak vs hbase, what do they

  - by Mickey Shine

  Sorry if this question is somewhat subjective. I am new to 'could store', 'distributed store' or some concepts like this. I really wonder what do they have in common and want to get an overview on all of them. What do I need to prepare if I want to write a product similar to this?

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• Difference between Document-oriented-DB and Bigtable clones

  - by chen

  We are looking for a suitable storage engine for our weblog history data. We looked at Bigtable's paper and understand it is suitable to us well. However, I also understand that Document-oriented-DB such as MongoDB seems to provide a little more powerful schema power -- i.e, it can model our data as well. I wonder how nowadays ppl choose a…

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• Google Bigtable-primarykey

  - by megala

  I know how to create table in google bigtable.My constriant is how to set primary key for my table using jpa.

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• Scalability comparison between different DBMSs

  - by Björn Lindfors

  By what factor does the performance (read queries/sec) increase when a machine is added to a cluster of machines running either: a Bigtable-like database MySQL? Google's research paper on Bigtable suggests that "near-linear" scaling is achieved can be achieved with Bigtable. This page here featuring MySQL's marketing jargon suggests…

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• What is an SSTable?

  - by knorv

  In BigTable/GFS and Cassandra terminology, what is the definition of a SSTable?

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• What is a SSTable?

  - by knorv

  In BigTable/GFS and Cassandra terminology, what is the definition of a SSTable?

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• what is a commit log?

  - by Yang

  in google's bigtable context, what does a commit log mean? and what is the use of a commit log?

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• Hidden limitations of Google App Engine?

  - by Kyle Cronin

  I've been looking into writing a web app that will run on Google App Engine, but before I commit myself to the platform I'd like to know what, if any, limitations there are. I'm aware of the basic CPU/bandwidth restrictions that Google places on the free service, but I'm wondering more about development restrictions like how BigTable…

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• Alternative databases to use when putting IIS Logs into a database using LogParser

  - by Robin Day

  We have run some scripts that use LogParser to dump our IIS logs into a SQL Server database. We can then query this to get simple stats on hits, usage etc. It's also good when linking it to error log databases and performance counter database to compare usage with errors, etc. Having implemented this for just one system and for the…

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• mysql stored routine vs. mysql-alternative?

  - by user522962

  We are using a mysql database w/ about 150,000 records (names) total. Our searches on the 'names' field is done through an autocomplete function in php. We have the table indexed but still feel that the searching is a bit sluggish (a few full seconds vs. something like Google Finance w/ near-instant response). We came up w/ 2…

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• Google App-Engine Java Batch Update

  - by Manjoor

  I need to upload a .csv file and save the records in bigtable. My application successfully parse 200 the records in the csv files and save to table. Here is my code to save the data. for (int i=0;i<lines.length -1;i++) //lines hold total records in csv file { String line = lines[i]; //The record have 3 columns…

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• mysql query performance help

  - by Stefano

  Hi I have a quite large table storing words contained in email messages mysql> explain t_message_words; +----------------+---------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +----------------+---------+------+-----+---------+----------------+ | mwr_key…

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• Hadoop Map/Reduce - simple use example to do the following...

  - by alexeypro

  I have MySQL database, where I store the following BLOB (which contains JSON object) and ID (for this JSON object). JSON object contains a lot of different information. Say, "city:Los Angeles" and "state:California". There are about 500k of such records for now, but they are growing. And each JSON object is quite big. My…

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• Database that consumes less disk space

  - by Hugo Palma

  I'm looking at solutions to store a massive quantity of information consuming the less possible disk space. The information structure is very simple and the queries will also be very simple. I've looked at solutions like Apache Cassandra and relations databases but couldn't find a comparison where disk usage is mentioned.…

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• how to model a follower stream in appengine?

  - by molicule

  I am trying to design tables to buildout a follower relationship. Say I have a stream of 140char records that have user, hashtag and other text. Users follow other users, and can also follow hashtags. I am outlining the way I've designed this below, but there are two limitaions in my design. I was wondering if others…

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• App engine downtime

  - by DutrowLLC

  I've noticed that google app engine seems to have a fair amount of downtime where they place the datastore into read-only mode. Frequently this downtime is in the middle of the day. Is this something that is happening only during early development, or is this something that I can expect to be always be occurring? I've…

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• What is the best way to create a running integer id on the AppEngine data storage?

  - by Freed

  For various reasons, I need a unique running integer id for my entities stored on the Google AppEngine. The automatically generated key sort of has this behaviour, but it doesn't start from 1 (or 0) and doesn't guarantee that the generated integer part will come from a continuous sequence. What would be the best way to…

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• Can I use django.contrib.gis on GAE?

  - by skrat

  Can I use GeoDjango with GAE / BigTable?

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• Can I use django.contrib.gif on GAE?

  - by skrat

  Can I use GeoDjango with GAE / BigTable?

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• Is it possible to return a list of numbers from a Sybase function?

  - by ps_rs4

  I'm trying to overcome a very serious performance issue in which Sybase refuses to use the primary key index on a large table because one of the required fields is specified indirectly through another table - or, in other words; SELECT ... FROM BIGTABLE WHERE KFIELD = 123 runs in ms but SELECT ... FROM BIGTABLE,…

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• What datatypes are supported by Google App Engine's datastore?

  - by user309944

  I know how to table in google BigTable.I have one doubt regarding this.what are all the datatype supported by google BigTable. Thanks in advance

  Read the article

• SQL JOIN with two or more tables as output - most efficient way?

  - by littlegreen

  I have an SQL query that executes a LEFT JOIN on another table, then outputs all results that could be coupled into a designated table. I then have a second SQL query that executes the LEFT JOIN again, then outputs the results that could not be coupled to a designated table. In code, this is something like: INSERT…

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• Faster Subversion Hosting

  When we launched our first Subversion-on- Bigtable service in 2006 our goal was to scale to support hundreds of thousands of projects, with the idea that we could...

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