zeppelin | A Scalable , High-Performance Distributed Key-Value Platform | Key Value Database library

 by   Qihoo360 C++ Version: 1.2.7 License: Apache-2.0

kandi X-RAY | zeppelin Summary

kandi X-RAY | zeppelin Summary

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

Zeppelin: A Scalable, High-Performance Distributed Key-Value Platform. Zeppelin is developed and maintained by Qihoo PikaLab and DBA Team, inspired by Pika and Ceph. It's a Distributed Key-Value Platform which aims to provide excellent performance, reliability, and scalability. And based on Zeppelin, we could easily build other services like Table Store, S3 or Redis.
Support
    Quality
      Security
        License
          Reuse

            kandi-support Support

              zeppelin has a low active ecosystem.
              It has 385 star(s) with 79 fork(s). There are 57 watchers for this library.
              OutlinedDot
              It had no major release in the last 12 months.
              There are 6 open issues and 14 have been closed. On average issues are closed in 47 days. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of zeppelin is 1.2.7

            kandi-Quality Quality

              zeppelin has no bugs reported.

            kandi-Security Security

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

            kandi-License License

              zeppelin 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.

            kandi-Reuse Reuse

              zeppelin releases are available to install and integrate.

            Top functions reviewed by kandi - BETA

            kandi's functional review helps you automatically verify the functionalities of the libraries and avoid rework.
            Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of zeppelin
            Get all kandi verified functions for this library.

            zeppelin Key Features

            No Key Features are available at this moment for zeppelin.

            zeppelin Examples and Code Snippets

            No Code Snippets are available at this moment for zeppelin.

            Community Discussions

            QUESTION

            How can I run zeppelin with keberos in CDH 6.3.2
            Asked 2021-May-26 at 03:24

            zeppelin 0.9.0 does not work with Kerberos

            I have add "zeppelin.server.kerberos.keytab" and "zeppelin.server.kerberos.principal" in zeppelin-site.xml

            But I aldo get error "Client cannot authenticate via:[TOKEN, KERBEROS]; Host Details : local host is: "bigdser5/10.3.87.27"; destination host is: "bigdser1":8020;"

            And add "spark.yarn.keytab","spark.yarn.principal" in spark interpreters,it does not work yet.

            In my spark-shell that can work with Kerberos

            My kerberos step

            1.admin.local -q "addprinc jzyc/hadoop"

            1. kadmin.local -q "xst -k jzyc.keytab jzyc/hadoop@JJKK.COM"

            2. copy jzyc.keytab to other server

            3. kinit -kt jzyc.keytab jzyc/hadoop@JJKK.COM

            In my livy I get error "javax.servlet.ServletException: org.apache.hadoop.security.authentication.client.AuthenticationException: javax.security.auth.login.LoginException: No key to store"

            ...

            ANSWER

            Answered 2021-Apr-15 at 09:01
            INFO [2021-04-15 16:44:46,522] ({dispatcher-event-loop-1} Logging.scala[logInfo]:57) - Got an error when resolving hostNames. Falling back to /default-rack for all
             INFO [2021-04-15 16:44:46,561] ({FIFOScheduler-interpreter_1099886208-Worker-1} Logging.scala[logInfo]:57) - Attempting to login to KDC using principal: jzyc/bigdser4@JOIN.COM
             INFO [2021-04-15 16:44:46,574] ({FIFOScheduler-interpreter_1099886208-Worker-1} Logging.scala[logInfo]:57) - Successfully logged into KDC.
             INFO [2021-04-15 16:44:47,124] ({FIFOScheduler-interpreter_1099886208-Worker-1} Logging.scala[logInfo]:57) - getting token for: DFS[DFSClient[clientName=DFSClient_NONMAPREDUCE_1346508100_40, ugi=jzyc/bigdser4@JOIN.COM (auth:KERBEROS)]] with renewer yarn/bigdser1@JOIN.COM
             INFO [2021-04-15 16:44:47,265] ({FIFOScheduler-interpreter_1099886208-Worker-1} DFSClient.java[getDelegationToken]:700) - Created token for jzyc: HDFS_DELEGATION_TOKEN owner=jzyc/bigdser4@JOIN.COM, renewer=yarn, realUser=, issueDate=1618476287222, maxDate=1619081087222, sequenceNumber=171, masterKeyId=21 on ha-hdfs:nameservice1
             INFO [2021-04-15 16:44:47,273] ({FIFOScheduler-interpreter_1099886208-Worker-1} Logging.scala[logInfo]:57) - getting token for: DFS[DFSClient[clientName=DFSClient_NONMAPREDUCE_1346508100_40, ugi=jzyc/bigdser4@JOIN.COM (auth:KERBEROS)]] with renewer jzyc/bigdser4@JOIN.COM
             INFO [2021-04-15 16:44:47,278] ({FIFOScheduler-interpreter_1099886208-Worker-1} DFSClient.java[getDelegationToken]:700) - Created token for jzyc: HDFS_DELEGATION_TOKEN owner=jzyc/bigdser4@JOIN.COM, renewer=jzyc, realUser=, issueDate=1618476287276, maxDate=1619081087276, sequenceNumber=172, masterKeyId=21 on ha-hdfs:nameservice1
             INFO [2021-04-15 16:44:47,331] ({FIFOScheduler-interpreter_1099886208-Worker-1} Logging.scala[logInfo]:57) - Renewal interval is 86400051 for token HDFS_DELEGATION_TOKEN
             INFO [2021-04-15 16:44:47,492] ({dispatcher-event-loop-0} Logging.scala[logInfo]:57) - Got an error when resolving hostNames. Falling back to /default-rack for all
             INFO [2021-04-15 16:44:47,493] ({FIFOScheduler-interpreter_1099886208-Worker-1} Logging.scala[logInfo]:57) - Scheduling renewal in 18.0 h.
             INFO [2021-04-15 16:44:47,494] ({FIFOScheduler-interpreter_1099886208-Worker-1} Logging.scala[logInfo]:57) - Updating delegation tokens.
             INFO [2021-04-15 16:44:47,521] ({FIFOScheduler-interpreter_1099886208-Worker-1} Logging.scala[logInfo]:57) - Updating delegation tokens for current user.
            

            Source https://stackoverflow.com/questions/67023694

            QUESTION

            Apache Zeppelin python to angular binding does not happen all the time, unbinding gives error
            Asked 2021-May-20 at 11:26

            I have created an angular download button with countdown timer as part of a larger Apache Zeppelin notebook (url below is changed for this example). Once the countdown completes, the button is disabled. I am binding python variables via z.angularBind() so my angular paragraph can use them. This seems to be inline with the back-end API calls. However, sometimes (and inconsistently) the bindings do not successfully occur, and so the button doesn't display because timer does not exist. I have verified this by displaying the bound values below the button, and they are empty, but only sometimes.

            Here are my three sequential zeppelin notebook paragraphs:

            ...

            ANSWER

            Answered 2021-May-20 at 11:26
            %python
            z.z.angularUnbind("url")
            bunny = 'https://positively.com/files/bunny-on-side.jpg'
            z.z.angularBind("url", bunny)
            

            Source https://stackoverflow.com/questions/67578740

            QUESTION

            Why does the minting function of ERC721 have an access control?
            Asked 2021-May-19 at 23:10

            Most of the ERC721 examples using Open Zeppelin I see require the mint function to have an access control where only the owner of the contract is allowed to call the function. For example,

            ...

            ANSWER

            Answered 2021-May-19 at 23:10

            The ERC-721 standard does not define a "best" or "correct" way to mint new tokens (such as whether it should be open or restricted) and it's up to each contract developer to implement or omit the minting feature in a way that reflects their needs.

            Creating of NFTs ("minting") and destruction NFTs ("burning") is not included in the specification. Your contract may implement these by other means. Please see the event documentation for your responsibilities when creating or destroying NFTs.

            But having a whitelist of addresses that are authorized to mint new tokens (e.g. MINTER_ROLE or onlyOwner) seems to be more common than allowing anyone to freely mint new tokens.

            Even though it's theoretically possible to deploy new contract each time a new token is minted, it's not a standard approach (and I personally haven't seen any contract that does it). In most cases the minting process "just" creates a new ID, stores a new string/URL value associated with the ID, associates this new token with an owner address (of the token, not a contract owner), plus updates some metadata such as amount of tokens owned by an address (see example below).

            The token owner can then transfer their tokens, give anyone control over their tokens, and do other stuff depending on the contract implementation.

            The mappings that you point out in your question (_owners and _balances) suggest that they store token owner (not contract owner) addresses as well as amount of tokens held by each address.

            Example:

            1. Contract owner mints token ID 1 to address 0x123.

              • Value of _owners[1] is 0x123 (was 0, the default value)

              • Value of _balances[0x123] becomes 1 (was 0, the default value)

            2. Contract owner mints token ID 2 to address 0x123.

              • Value of _owners[1] is still 0x123

              • Value of _owners[2] is now 0x123 (was 0, the default value)

              • Value of _balances[0x123] becomes 2 (because they now own 2 tokens)

            Source https://stackoverflow.com/questions/67611716

            QUESTION

            SQL: Match timestamps with time-only parameter to group and count unique times across multiple days
            Asked 2021-May-17 at 22:18

            Using SQL or Pyspark, I want to count the number of unique times in a timestamp across a time frame of 2 months. I want to see the distribution of how often rows are logged to the table. This is because I know there a large proportion of timestamps with the time of 00:00:00, but I want to know how big and the ratio compared to other times.

            This query groups and counts the most common datetimes, but I need to exclude the date and only have the time. Apparently, this is not so common thing to do.

            ...

            ANSWER

            Answered 2021-May-17 at 21:51

            Maybe something like this?

            Source https://stackoverflow.com/questions/67577266

            QUESTION

            How to access different levels of a nested graphql response using JavaScript?
            Asked 2021-May-01 at 09:38

            I have a graphql response that looks like this:

            ...

            ANSWER

            Answered 2021-May-01 at 09:35

            Since body.data.ethereum.address[0].balances is an array of objects body.data.ethereum.address[0].balances[0].currency.address is only going to access the very first of those objects.

            You could use Array.map to get all addresses:

            Source https://stackoverflow.com/questions/67344463

            QUESTION

            Generating HTML links in a Zeppelin Impala output table column?
            Asked 2021-Apr-21 at 16:14

            I'm trying to figure out a way to generate HTML links in an output table from an Impala query in a Zeppelin note (one link for each row, and they would be in their own column in the table). Clicking the link would cause a relevant data file to be downloaded from the file system to the user's computer (that's the easy bit).

            The tricky bit is how to generate the link in an Impala output table. Is there a particular SELECT query that would do this? Can I generate a custom template for the output table that Zeppelin uses to display Impala results? Is there some other solution?

            Each link would have a slightly different href as there would be a different file on the system related to each output row, I think generating the href would be straightforward based on the row data but this is more about what syntax would cause an HTML link to be generated and displayed in a column?

            Thanks

            ...

            ANSWER

            Answered 2021-Apr-21 at 16:14

            This will not work while using Impala with the existing Zeppelin %jdbc Interpreter as that interpreter strictly reads/interprets SQL statements and offers no ability to manipulate your result data using code.

            The following two workarounds might help

            Option 1: Instead of using %jdbc Interpreter to run the Impala query use %python or %spark (Scala) interpreters to run the Impala query via JDBC. Then do your data manipulation (cast to html link) in the same cell.

            Example using Python Interpreter with jaydebeapi:

            Source https://stackoverflow.com/questions/66496960

            QUESTION

            Why Spark application saves a DataFrame to S3 bucket with multi csv files
            Asked 2021-Apr-16 at 18:26

            Hi I'm new to Spark and Amazon EMR cluster.

            I tried to write a demo spark application that can run on Amazon EMR cluster. When the code runs on Zeppelin notebook, it returns output which I thought output will be saved as a single file on Amazon EMR cluster as below:

            ...

            ANSWER

            Answered 2021-Apr-16 at 18:26

            Spark works with the concept of partitions in order to parallelize the tasks among the workers. The dataframe is also partitioned and when the save action is called, each worker will save a portion of the dataframe creating multiple files.

            In order to create a single file, just repartition or coalesce the dataframe into one partition:

            Source https://stackoverflow.com/questions/67128355

            QUESTION

            Spark get a column as sequence for usage in zeppelin select form
            Asked 2021-Apr-16 at 08:29

            I have a dataframe from which I want to select column(s) as seq to be used in zeppelin Select form.

            This is how the select form works:

            Select form requires

            ...

            ANSWER

            Answered 2021-Apr-16 at 08:28

            You can try getting a tuple of object and string from the RDD, and use toIterable to convert to Iterable[(Object, String)]:

            Source https://stackoverflow.com/questions/67121614

            QUESTION

            Expose spark-ui with zeppelin on kubernetes
            Asked 2021-Apr-14 at 18:33

            First of all I'm pretty new on all this (kubernetes, ingress, spark/zeppelin ...) so my apologies if this is obvious. I tried searching here, documentations etc but couldn't find anything.

            I am trying to make the spark interpreter ui accessible from my zeppelin notebook running on kubernetes. Following what I understood from here: http://zeppelin.apache.org/docs/0.9.0-preview1/quickstart/kubernetes.html, my ingress yaml looks something like this:

            Ingress.yaml

            ...

            ANSWER

            Answered 2021-Apr-14 at 18:33

            You can create a new service and leverage the interpreterSettingName label of the spark master pod. When zeppelin creates a master spark pod it adds this label and its value is spark. I am not sure if it will work for more than one pods in a per user per interpreter setting. Below is the code for service, do let me know how it behaves for per user per interpreter.

            Source https://stackoverflow.com/questions/67068889

            QUESTION

            PySpark creating CSV does not work, _SUCCESS file only
            Asked 2021-Apr-05 at 20:49

            This might be a stupid question, but I've just started to learn spark and now I'm facing my first problem, that I cannot solve with books and google...

            I'm working with Zeppelin and trying to do some analysis with a serverlog.

            My df looks like:

            Now I want to save it as a CSV with following code:

            ...

            ANSWER

            Answered 2021-Apr-05 at 20:49

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

            Vulnerabilities

            No vulnerabilities reported

            Install zeppelin

            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 .
            Find more information at:

            Find, review, and download reusable Libraries, Code Snippets, Cloud APIs from over 650 million Knowledge Items

            Find more libraries

            Stay Updated

            Subscribe to our newsletter for trending solutions and developer bootcamps

            Agree to Sign up and Terms & Conditions

            Share this Page

            share link