arcus | ARCUS is the NAVER memcached with lists , sets , maps | Caching library

 by   naver Shell Version: Current License: Apache-2.0

kandi X-RAY | arcus Summary

kandi X-RAY | arcus Summary

arcus is a Shell library typically used in Server, Caching applications. arcus has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

arcus is a [memcached][memcached]-based cache cloud developed by [naver corp][naver]. [arcus-memcached] has been heavily modified to support functional and performance requirements of naver services. arcus supports collection data structures (list, set, map, b+tree) for storing/retrieving multiple values as a structured form in addition to the basic key-value data model of memcached. arcus manages multiple clusters of memcached nodes using [zookeeper][zookeeper]. each cluster or cloud is identified by its service code. think of the service code as the cloud’s name. the user may add/remove memcached nodes/clouds on the fly. and, arcus detects failed nodes and automatically removes them. the overall architecture is shown below. the memcached node is identified by its name (ip address:port number). zookeeper maintains a database of memcached node names and
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            kandi-support Support

              arcus has a low active ecosystem.
              It has 280 star(s) with 80 fork(s). There are 54 watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              There are 4 open issues and 5 have been closed. On average issues are closed in 194 days. There are 1 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of arcus is current.

            kandi-Quality Quality

              arcus has 0 bugs and 0 code smells.

            kandi-Security Security

              arcus has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              arcus code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              arcus 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

              arcus releases are not available. You will need to build from source code and install.
              Installation instructions, examples and code snippets are available.
              It has 3285 lines of code, 297 functions and 7 files.
              It has high code complexity. Code complexity directly impacts maintainability of the code.

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            Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of arcus
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            arcus Key Features

            No Key Features are available at this moment for arcus.

            arcus Examples and Code Snippets

            No Code Snippets are available at this moment for arcus.

            Community Discussions

            QUESTION

            ggforce geom_arc: How to calculate atan and draw the arc on the intended side
            Asked 2021-Nov-11 at 17:58

            I can't get my head around the calculation of atan2 and placing a geom_arc on the intended side.

            Here's some dummy data with four pairs of points ABC. I'd like to draw four arcs, each on the side with the smaller angle and print the angle degrees. Calculating angle dregrees works, but I'd need 1) some switch to correct the atan2 and/or 2) another switch to put the arc on the intended side. Just exchanging start and end has no effect.

            ...

            ANSWER

            Answered 2021-Nov-11 at 17:58

            It seems you are looking for something like this:

            Source https://stackoverflow.com/questions/69930723

            QUESTION

            Calculate Angle for Rotation in Pure CSS
            Asked 2021-Oct-15 at 08:48

            I would like to use CSS animations to move an SVG along a linear path across a full-window page with aligning the SVG to this path. Referring to the figure below with the path shown as a red line, I want to specify h in multiples of vh and w in multiples of vw, e.g. h = 30vh, w = 60vw, and calculate the angle α for rotating the SVG shown as the blue triangle.

            Or course, this should be responsive and work with different window sizes. I was hoping to do all this in pure CSS.

            Following tan(α) = w/h, I can use the arcus tangens function to calculate the angle α from the quotient w/h. Since trigonometric function are not available in CSS yet, I could use a series approximation for calculating the angle as demonstrated here. But the actual show-stopper seems to be the calculation of the quotient w/h as divisions in CSS require the denominator to be unitless. So, 60vw / 30vh is not allowed.

            Is there a different way to calculate or set the angle in CSS? Or do I have to fall back to a JavaScript solution here?

            Edit: Here is a minimal reproducible example. In order to set the rotation in the first keyframe, the actual angle α would be required. It is currently fixed to rotate(0deg) so the triangle always points upwards instead in the direction of the linear path.

            ...

            ANSWER

            Answered 2021-Oct-15 at 08:48

            Following A Haworth's comment, I finally used vmin to create animations with fixed ratios. This ratio can then be used to pre-calculate an angle as shown in the snippet below.

            This solution has some limitations but is responsive and works with different window sizes.

            Source https://stackoverflow.com/questions/69116968

            QUESTION

            Jax-ws Jersey formdata upload response returning 500 error
            Asked 2021-Sep-20 at 12:08

            Greetings StackOverflow members.

            background information: This is a spring-boot-based project that uses JAX-RS / Jersey as its rest HTTP server instead of spring rest.

            Error explanation and question:

            send a file from one server to another and receive a response back. (simple right?) functionally the code is below is working. but instead of a 200 response, the sender gets 500 internal server error with the following stack trace.

            ...

            ANSWER

            Answered 2021-Sep-20 at 12:08

            Alright. It took me a day to try and resolve this. but was not able to find root cause of this behavior.

            So I opted for a workaround solution.

            Using jersey exception mapper i check for the specific expectation that is thrown and the method since it should only apply to that location of the code and the response status to see if it needs to be overwritten with 200 ok or pass along with 500.

            Source https://stackoverflow.com/questions/69210637

            QUESTION

            how to write SQL sub-query in SQL (SQLite)?
            Asked 2021-Jul-19 at 10:37

            Here is sample data I am looking for total buying trade value and total selling trades value based on country.

            Here are two tables, country and trades Table [companies]:

            ...

            ANSWER

            Answered 2021-Jul-19 at 10:17

            QUESTION

            calculate import-export
            Asked 2020-Nov-18 at 13:22

            Given a company table companylist and a import-export table trades, I want to find the total exports and imports per country. I want to sort them by country name and print 0s instead of nulls if exports/imports are 0. All countries need to be present in output.

            Companylist table =>

            ...

            ANSWER

            Answered 2020-Nov-18 at 07:16

            Conditional aggregation is an option:

            Source https://stackoverflow.com/questions/64888500

            QUESTION

            SQL nested query and use of MAX to extract most recent transaction and/or comment
            Asked 2020-Jul-15 at 02:41

            We have a SQL database table recording customer comments (ARCMM). I want to extract the most recent comment for each customer. Some customers do not have any comments (i.e. no entries in ARCMM). The most recent comment for a customer will have the most recent date (field DATEENTR) and, for that date, the highest value of field CNTUNIQ. The query below does not work as expected. Best fix?

            Query:

            ...

            ANSWER

            Answered 2020-Jul-15 at 02:41

            You could use row_number() within the left join, if your database supports window functions:

            Source https://stackoverflow.com/questions/62906505

            QUESTION

            Dependency missing when running AzureML Estimator in docker environment
            Asked 2020-Jun-01 at 21:10
            Scenario description

            I'm trying to submit a training script to AzureML (want to use AmlCompute, but I'm starting/testing locally first, for debugging purposes).

            The train.py script I have uses a custom package (arcus.ml) and I believe I have specified the right settings and dependencies, but still I get the error:

            User program failed with ModuleNotFoundError: No module named 'arcus.ml'

            Code and reproduction

            This the python code I have:

            ...

            ANSWER

            Answered 2020-Jun-01 at 20:47

            I think this error isn't necessarily about Azure ML. I think the error has to do w/ the difference b/w using a hyphen and a period in your package name. But I'm a python packaging newb. In a new conda environment on my laptop, I ran the following

            Source https://stackoverflow.com/questions/62140446

            QUESTION

            Delete SQL query errors
            Asked 2020-May-07 at 17:16

            I receive an error, from the below statement; It runs perfectly as a select statement, but fails as a delete. Any idea's how to get this statement working as a delete? Seems to error out at C.*

            ...

            ANSWER

            Answered 2020-May-07 at 16:53

            This looks like SQL Server syntax (because of the square brackets surrounding identifiers).

            In that case, the problem is with c.*; you should be using the "raw" table alias instead:

            Source https://stackoverflow.com/questions/61663343

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

            Vulnerabilities

            No vulnerabilities reported

            Install arcus

            Arcus setup usually follows three steps below. To quickly set up and test an Arcus cloud on the local machine, run the commands below. They build memcached, set up a cloud of two memcached nodes in ZooKeeper, and start them, all on the local machine. The commands assume RedHat/CentOS environment. If any problem exists in build, please refer to [build FAQ](/docs/build-faq.md). To set up Arcus cache clouds on multiple machines, you need following two things. Please see [Arcus cache cloud setup in multiple servers](docs/arcus-cloud-in-multiple-servers.md) for more details. Once you finish setting up an Arcus cache cloud on multiple machines, you can quickly test Arcus on the command line, using telnet and ASCII commands. See [Arcus telnet interface](https://github.com/naver/arcus-memcached/blob/master/doc/ap01-arcus-telnet-interface.md). Details on Arcus ASCII commands are in [Arcus ASCII protocol document](https://github.com/naver/arcus-memcached/blob/master/doc/ch00-arcus-ascii-protocol.md). To develop Arcus application programs, please take a look at Arcus clients. Arcus currently supports Java and C/C clients. Each module includes a short tutorial where you can build and test "hello world" programs. - [Arcus Java client](https://github.com/naver/arcus-java-client) - [Arcus C/C client](https://github.com/naver/arcus-c-client).
            Preparation - clone and build this Arcus code, and deploy Arcus code/binary package.
            Zookeeper setup - initialize Zookeeper ensemble for Arcus and start Zookeeper processes.
            Memcached setup - register cache cloud information into Zookeeper and start cache nodes.
            [Arcus cloud configuration file](docs/arcus-cloud-configuration-file.md): Arcus cache cloud settings in JSON format
            [Arcus cloud admin script (arcus.sh)](docs/arcus-admin-script-usage.md): A tool to control Arcus cache cloud.

            Support

            Currently, Arcus only supports 64-bit Linux. It has been tested on the following OS platforms. If you are interested in supporting other OS platforms, please try building/running Arcus on them. And let us know of any issues.
            Find more information at:

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            CLONE
          • HTTPS

            https://github.com/naver/arcus.git

          • CLI

            gh repo clone naver/arcus

          • sshUrl

            git@github.com:naver/arcus.git

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