bplustree | An on-disk Btree for Python | Database library

by NicolasLM Python Version: 0.0.3.dev1 License: MIT

X-Ray Key Features Code Snippets Community Discussions(7)Vulnerabilities Install Support

kandi X-RAY | bplustree Summary

bplustree is a Python library typically used in Database applications. bplustree has no bugs, it has no vulnerabilities, it has build file available, it has a Permissive License and it has low support. You can install using 'pip install bplustree' or download it from GitHub, PyPI.

An on-disk B+tree for Python 3

Support

Quality

Security

License

Reuse

Support

bplustree has a low active ecosystem.

It has 697 star(s) with 52 fork(s). There are 20 watchers for this library.

It had no major release in the last 12 months.

There are 1 open issues and 5 have been closed. On average issues are closed in 5 days. There are 1 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of bplustree is 0.0.3.dev1

Quality

bplustree has 0 bugs and 0 code smells.

Security

bplustree has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

bplustree code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

bplustree is licensed under the MIT License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

bplustree releases are available to install and integrate.

Deployable package is available in PyPI.

Build file is available. You can build the component from source.

bplustree saves you 762 person hours of effort in developing the same functionality from scratch.

It has 1755 lines of code, 191 functions and 17 files.

It has medium code complexity. Code complexity directly impacts maintainability of the code.

Top functions reviewed by kandi - BETA

kandi has reviewed bplustree and discovered the below as its top functions. This is intended to give you an instant insight into bplustree implemented functionality, and help decide if they suit your requirements.

Insert a key into the tree .
Get the metadata for the page .
Opens a file in the given directory .
Iterates through all of the outstanding pages and yields them .
Return a new Node instance from the given data .
Slice an iterable .
Insert an entry .
Read data from a file .
Write data to file .
Combine two iterables .

Get all kandi verified functions for this library.

bplustree Key Features

No Key Features are available at this moment for bplustree.

bplustree Examples and Code Snippets

No Code Snippets are available at this moment for bplustree.

Community Discussions

Trending Discussions on bplustree

Apache Ignite + Spark Dataframes: Client vs Server Doubts

Ignite thread exception of "sun.misc.Unsafe.park" and stop handle request anymore

Ignite service hangs when call cache remove in another cache's invoke processor, " Possible starvation in striped pool"?

Oracle update value of a table using inner join with the same table

Java Generics - Can not cast K to Long

Apache Ignite - java.lang.ClassNotFoundException: Unknown pair

Implementation of B/B+ Tree in relation to making a class a friend of another class dilemma

QUESTION

Apache Ignite + Spark Dataframes: Client vs Server Doubts

Asked 2020-Jan-10 at 07:09

I've been trying to integrate ignite and spark. The goal of my application is to write and read spark dataframes to/from ignite. However, I'm facing several issues with larger datasets (> 200 000 000 rows).

I have a 6-node Ignite cluster running on YARN. It has 160Gb of memory and 12 cores. I am trying to save the dataframe using spark (around 20Gb of raw text data) in an Ignite cache (partitioned 1 backup):

...

ANSWER

Answered 2018-Dec-10 at 17:44

First, the Spark-Ignite connector already connects in client mode.

I'm going to assume that you have enough memory, but you can follow the example in the Capacity Planning guide to be sure.

However, I think the problem is that you're following the sample application a bit too closely(!). The sample -- so as to be self-contained -- includes both a server and a Spark client. If you already have an Ignite cluster, you don't need to start a server in your Spark client.

This is a slightly hacked down example from a real application (in Java, sorry):

Source https://stackoverflow.com/questions/53704478

QUESTION

Ignite thread exception of "sun.misc.Unsafe.park" and stop handle request anymore

Asked 2019-Jul-04 at 09:12

I have 2 ignite client(2 IDEA project running in one laptop) + 2 ignite server(2 linux vm)

when i try to send some request to get info from ignite cache, it dumps with bellow exceptions:

...

ANSWER

Answered 2018-Apr-22 at 03:54

You should not do a synchronous put() within the EntryProcessor. Processor is already invoked within a lock, so this can cause a deadlock and/or thread starvation.

If you need to update the processed entry, use MutableEntry#setValue(..).

Source https://stackoverflow.com/questions/49959363

QUESTION

Ignite service hangs when call cache remove in another cache's invoke processor, " Possible starvation in striped pool"?

Asked 2018-Jul-02 at 17:13

Ignite logs have starvation waringings and stop to provide service:

...

ANSWER

Answered 2018-Jun-12 at 14:11

Striped pool used for processing of the Ignite messages. Looks like for some reason all the threads from this pool is waiting for some operation (remove from cache in your log). It could be related to network problems or removing takes a lot of time (for example you are going to remove all the data).

Could you please attach the thread dump and your test code for investigation?

Source https://stackoverflow.com/questions/50818322

QUESTION

Oracle update value of a table using inner join with the same table

Asked 2018-Jan-08 at 13:58

I am trying to update the depth column of bplustree table using this statement,which works fine on MYSQL,but on oracle I have this error:

...

ANSWER

Answered 2018-Jan-07 at 21:50

You may combine update and select by the help of merge like the following statement :

Source https://stackoverflow.com/questions/48141339

QUESTION

Java Generics - Can not cast K to Long

Asked 2017-Oct-05 at 15:51

I have below code which compiles perfectly fine with maven but Intellij keeps on giving me error saying Inconvertible types can not cast 'K' to java.lang.Long.

...

ANSWER

Answered 2017-Oct-05 at 15:51

Comparable is a bit weird when dealing with generics. I believe the correct definition is below:

Source https://stackoverflow.com/questions/46589542

QUESTION

Apache Ignite - java.lang.ClassNotFoundException: Unknown pair

Asked 2017-Jun-28 at 15:04

this is my last attempt to configure Apache Ignite 2.0 to work with Cassandra as persistence layer and ODBC as query layer.

ODBC configuration is ok, I am able to put and get data in the cache with sql, but when I plug in Cassandra (version 3.9 via docker image) as persistence layer I get this:

...

ANSWER

Answered 2017-Jun-28 at 15:04

Please try to turn on isStoreKeepBinary in cache settings - like this; please note the last line:

Source https://stackoverflow.com/questions/44781672

QUESTION

Implementation of B/B+ Tree in relation to making a class a friend of another class dilemma

Asked 2017-Feb-18 at 08:04

I am currently in the process of coding my B+ Tree and this is the structure of my code for reference so that my proceeding question makes more sense:

...

ANSWER

Answered 2017-Feb-18 at 08:04

Adding the insert() in the Node class isn't bad at all. If it does look weird to you when BPlusTree::insert() calls Node::insert() please don't be there are quite some advantages to this style of code.

My answer could be opinion based.

With the Node::insert() node is much more complete and is a full fledged class on its own. The Node class can be used by many other classes that you might make in the future. So you won't have to write the insert() function again and again.

Modularity is exactly what the above paragraph means. Your code becomes much more modular this way.

I'm not against friending the BPlusTree class but the thing is that the day you make BPlusTreeImproved or anything that uses Node you'll have to friend that as well to use the Node. Which means constant pain of changing and recompiling Node.

Source https://stackoverflow.com/questions/42312432

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install bplustree

You can install using 'pip install bplustree' or download it from GitHub, PyPI.
You can use bplustree like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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