warpcore | A Library for fast Hash Tables on GPUs | Key Value Database library

by sleeepyjack C++ Version: 1.0.0-alpha.1 License: Apache-2.0

X-Ray Key Features Code Snippets Community Discussions(2)Vulnerabilities Install Support

kandi X-RAY | warpcore Summary

warpcore is a C++ library typically used in Database, Key Value Database applications. warpcore has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

warpcore is a framework for creating high-throughput, purpose-built hashing data structures on CUDA-accelerators.

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Quality

Security

License

Reuse

Support

warpcore has a low active ecosystem.

It has 96 star(s) with 5 fork(s). There are 6 watchers for this library.

It had no major release in the last 6 months.

There are 2 open issues and 5 have been closed. On average issues are closed in 14 days. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of warpcore is 1.0.0-alpha.1

Quality

warpcore has no bugs reported.

Security

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

License

warpcore is licensed under the Apache-2.0 License. This license is Permissive.

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

Reuse

warpcore releases are not available. You will need to build from source code and install.

Installation instructions are not available. Examples and code snippets are available.

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warpcore Key Features

No Key Features are available at this moment for warpcore.

warpcore Examples and Code Snippets

No Code Snippets are available at this moment for warpcore.

Community Discussions

Trending Discussions on warpcore

How to use babel-preset-env with Jest

HDFS Showing 0 Blocks after cluster reboot

QUESTION

How to use babel-preset-env with Jest

Asked 2019-Oct-08 at 19:52

We are in the midst of updating our API, and Henry Zhu from Babel alerted me to this preset called babel-preset-env to replace need for babel-preset-es2015 and babel-preset-es2018.

Now, I am encountering difficulty understanding the simplest way to handle everything.

Our API uses node v8.x and async/await, native promises
I want spread operator
I want pipeline operator
I want import/export syntax
I want to support Jest
I like how babel-node transpiles the API into memory

This will be easier if I just show you the current position of our config:

.babelrc

...

ANSWER

Answered 2017-Sep-07 at 23:03

I think I got it working. Here is the solution:

.babelrc

The one posted in the question has a syntax error because the env preset needs to be wrapped in brackets[] (from: http://babeljs.io/docs/plugins/preset-env/)

Correct:

Source https://stackoverflow.com/questions/45259679

QUESTION

HDFS Showing 0 Blocks after cluster reboot

Asked 2018-Mar-03 at 17:41

I've setup a small cluster for testing / academic proposes, I have 3 nodes, one of which is acting both as namenode and datanode (and secondarynamenode).

I've uploaded 60GB of files (about 6.5 Million files) and uploads started to get really slow, so I read on the internet that I could stop the secondary namenode service on the main machine, at the moment it had no effect on anything. After I rebooted all 3 computers, two of my datanodes show 0 blocks (despite showing disk usage in web interface) even with both namenodes services running. One of the nodes with problem is the one running the namenode as well so I am guessing it is not a network problem.

any ideas on how can I get these blocks to be recognized again? (without start it all over again which took about two weeks to upload all)

Update

After half an hour after another reboot this showed in the logs:

2018-03-01 08:22:50,212 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Unsuccessfully sent block report 0x199d1a180e357c12, containing 1 storage report(s), of which we sent 0. The reports had 6656617 total blocks and used 0 RPC(s). This took 679 msec to generate and 94 msecs for RPC and NN processing. Got back no commands. 2018-03-01 08:22:50,212 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: IOException in offerService java.io.EOFException: End of File Exception between local host is: "Warpcore/192.168.15.200"; destination host is: "warpcore":9000; : java.io.EOFException; For more details see: http://wiki.apache.org/hadoop/EOFException

And the EOF stack trace, after searching the web I discovered this [http://community.cloudera.com/t5/CDH-Manual-Installation/CDH-5-5-0-datanode-failed-to-send-a-large-block-report/m-p/34420] but still can't understand how to fix this. The report block is too big and need to be split, but I don't know how or where should I configure this. I´m googling...

...

ANSWER

Answered 2018-Mar-03 at 17:41

The problem seems to be low RAM on my namenode, as a workaround I added more directories to the namenode configuration as if I had multiple disks and rebalanced the files manually as instructed ins the comments here. As hadoop 3.0 reports each disk separately the datenode was able to report and I was able to retrieve the files, this is an ugly workaround and not for production, but good enough for my academic purposes. An interesting side effect was the datanode reporting multiple times the available disk space wich could lead into serious problems on production. It seems a better solution is using HAR to reduce the number of blocks as described here and here

Source https://stackoverflow.com/questions/49049411

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

Vulnerabilities

No vulnerabilities reported

Install warpcore

You can download it from GitHub.

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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