ybc | Fast in-process BLOB cache with persistence support | Caching library

 by   valyala C Version: Current License: Non-SPDX

kandi X-RAY | ybc Summary

kandi X-RAY | ybc Summary

ybc is a C library typically used in Server, Caching applications. ybc has no bugs, it has no vulnerabilities and it has low support. However ybc has a Non-SPDX License. You can download it from GitHub.

YBC - Yet another Blob Cache library. This library implements fast in-process blob cache with persistence support. Q: Give me performance numbers! A: Well, YBC achieves 25.8 Mops/s for get() calls and 5.8 Mops/s for set() calls on my not-so-fast laptop with 2.50GHz Intel i5 CPU when running in 4 threads. Q: Does YBC work with /dev/shm/ ? A: Yes. Just create data and index files on /dev/shm . This will completely eliminate page swapping at the cost of potential data loss on power failure or computer reboot. Q: Is this yet another boring cache implementation? A: No. YBC is designed for modern OSes running on modern hardware. It takes advantage of OS’s and computer’s hardware features, while simultaneouly avoiding their weaknesses. This results in high performance and low resource usage. Read 'Features' chapter for more details.
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            kandi-support Support

              ybc has a low active ecosystem.
              It has 386 star(s) with 45 fork(s). There are 33 watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              There are 5 open issues and 13 have been closed. On average issues are closed in 18 days. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of ybc is current.

            kandi-Quality Quality

              ybc has no bugs reported.

            kandi-Security Security

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

            kandi-License License

              ybc has a Non-SPDX License.
              Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.

            kandi-Reuse Reuse

              ybc 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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            ybc Key Features

            No Key Features are available at this moment for ybc.

            ybc Examples and Code Snippets

            No Code Snippets are available at this moment for ybc.

            Community Discussions

            QUESTION

            Distance Estimation Using Quantum Computer
            Asked 2021-Feb-07 at 03:34

            I did a small benchmarking to compare quantum version of algorithm to its classical version, and I found that quantum computing taking so much time in comparison to classical version.

            I don't understand why its happening, it should be either similar to classical or better.

            DataSet Explanation: 1 test data point and 3 training data points, dimension = 2. Goal: our goal is to classify the test data point in one of training data point category.

            ...

            ANSWER

            Answered 2021-Feb-07 at 03:34

            I am a physicist and programmer who has worked extensively on Qiskit. I have limited experience with things like machine learning but if I am not mistaken figure 13 on page 22 of this paper on Nearest-Neighbor methods is precisely the circuit you are creating.

            You have a dramatic performance hit because you are simulating quantum hardware using classical algorithms. This is commented out:

            Source https://stackoverflow.com/questions/66071608

            QUESTION

            What is the easiest way to calculate position of balls on collision?
            Asked 2021-Jan-13 at 12:22

            I'm trying to make some simple pool game in java script. I have made it but I do not love way of checking if two balls will collide in next frame. I would like to have more easier way to calculate coordinates of balls when collision occurs. I found lot of answers base on collision kinematics, how to handle velocities and directions after collision, but no calculating a position when collision occurs.

            As you can see in sample diagram, gold ball is moving slower than a blue ball, and with distance that each ball will have to move on next frame will not be considered as collision. But, as you can see, they should collide (dashed lines).

            In that cause I have divided each movement into sectors and calculating if distance between the points is equal or smaller than ball diameter, which is slowing down process when many balls (like in snooker) have to be calculated in each frame, plus that way is not always 100% accurate and balls can go in inaccurate angles after hit (not a big difference, but important in snooker).

            Is there any easier way to calculate those (XAC,YAC) and (XBC,YBC) values with knowing start positions and velocities of each ball without dividing ball paths into sectors and calculating many times to find a proper distance?

            ...

            ANSWER

            Answered 2021-Jan-13 at 06:38

            It is worth to precalculate collision event only once (this approach works well with reliable number of balls, because we have to treat all ~n^2 pairs of balls).

            The first ball position is A0, velocity vector is VA. The second ball position is B0, velocity vector is VB.

            To simplify calculations, we can use Halileo principle - use moving coordinate system connected with the first ball. In that system position and velocity of the first ball are always zero. The second ball position against time is :

            Source https://stackoverflow.com/questions/65695029

            QUESTION

            How to get inner array values in typescript
            Asked 2020-Aug-17 at 18:41

            Hi I want to create a new array from existing array.

            ...

            ANSWER

            Answered 2020-Aug-17 at 13:37
            var finalValue = [];
            
            for (var i = 0; i < this.someArray.length; i++) {
              finalValue = [ ...finalValue, ...this.someArray[i].farcKeyValues ]
            }
            

            Source https://stackoverflow.com/questions/63451711

            QUESTION

            How to URL encode a dynamic email variable in Postman?
            Asked 2020-Aug-11 at 16:30

            i just wanna know if there is a way to url encode an dynamic email variable in postman? basically i want random names in all parts of the email for my collection run. For example test1@abc.com , ybc@asd.com.(which can be solved by using the email variable provided by postman) However, i also need to url encode that email so it will look something like this

            test1%40abc.com

            please let me know if this can be achieved with JS code snippet or any other easier method, Thanks in advance. :)

            ...

            ANSWER

            Answered 2020-Aug-11 at 16:30

            Add this line to your request's preRequest script: pm.environment.set("randomEncodedEmail", encodeURIComponent(pm.variables.replaceIn('{{$randomEmail}}'))); to generate an encoded random email address.

            Then you can just use {{randomEncodedEmail}} in your request to use it.

            Source https://stackoverflow.com/questions/63361679

            QUESTION

            SecKeyGeneratePair giving error -4 (Function or operation not implemented)
            Asked 2019-Nov-04 at 20:49

            I'm using https://code.tutsplus.com/tutorials/creating-digital-signatures-with-swift--cms-29287 to create digital signatures and I'm following along with the ECDSA section.

            I've created the following code:

            ...

            ANSWER

            Answered 2019-Nov-04 at 20:49

            The error status -4 has several meanings, not only errSecUnimplemented, but also errSecUnsupportedAlgorithm and errSecUnsupportedOperation, however, in this scenario, is is very likely it is the errSecUnimplemented.

            The reason for this is that you try to retrieve the private key from the Secure Enclave, which is 'impossible'. Part of the security of the Secure Enclave is that it will not have the ability of exposing the private key to you. So there you go, that is why it is throwing a errSecUnimplemented error at you.

            So if you want to use the Secure Enclave, I would suggest you look some more in the security documentation that Apple provides.

            A solution I can present you is the following:

            Source https://stackoverflow.com/questions/58533714

            QUESTION

            How can I create a loop or function to cycle through a list of two vectors containing variables to run KS tests on the response
            Asked 2019-Oct-23 at 05:24

            For ease I have simplified and generalized the code for the question.

            So my problem (R one that is) is that I am trying to cycle through a set of Kolmogorov Smirnov ks.boot tests for multiple levels across two factors. I need to subset the data for each level of the vector df.test$names (e.g. W, X, Y, and Z representing species names) then cycle through comparing the length distributions between each level of df.test$TSM.FACT (e.g. A,B,C and so on representing time periods).

            So for each level in df.test$names (e.g. W, X,Y,Z)I will need to compare their lengths distributions from different time periods A versus B; then A versus C, then B versus C and save out each result in a dataframe; recording where the comparison took place.

            ...

            ANSWER

            Answered 2019-Oct-23 at 05:24

            Preparing all patterns of names, TSM.FACT1, TSM.FACT2, you can do all test easily by loop like methods.

            Here is my example:

            Source https://stackoverflow.com/questions/58479230

            QUESTION

            Having issue opening Map via Fragment
            Asked 2019-Jan-07 at 13:38

            I'm trying to open a map via Fragment and for some reason the app collapse instantly I have also checked whether the API is correct and it seems to be ok. I have checked online for solutions with no success. in the MainActivity class i add only the line which makes the MapFragment object thanks for the help

            Manifest.xml

            ...

            ANSWER

            Answered 2019-Jan-06 at 21:08

            Your "mGoogleMap" variable is null , follow this code to fix it :

            Source https://stackoverflow.com/questions/54063080

            QUESTION

            SQL Server Job Using WinZip Command Line
            Asked 2018-Apr-12 at 21:53

            I have a SQL Server 2008 Job that backs up a database, then zips that backup and moves the zipped file. My job runs fine until it gets to the step that calls WinZip, which executes:

            ...

            ANSWER

            Answered 2018-Apr-12 at 21:53

            I think I discovered the problem. It turns out, we are using the GUI version of WinZip and calling the executable from the command line. Even though we can't see the GUI, it's still there. So, the prompt to confirm our compression is still there in the program's workflow, we just can't see it and thus can't confirm it. And the confirm flags don't work with the GUI version.

            My workaround involved logging in to my SQL server as our service account and running a WinZip operation. When it completed and gave me the Add Complete prompt, I checked Do not display this dialog in the future and clicked OK. This will suppress that prompt when the service account runs its Job.

            If someone changes the service account, we'll have to do this again, so our ultimate solution will be to install the WinZip Commmand Line Plugin. Hopefully, when that's done, we won't have to worry about this.

            But it works now. :-)

            Source https://stackoverflow.com/questions/49761403

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

            Vulnerabilities

            No vulnerabilities reported

            Install ybc

            You can download it from GitHub.

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            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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            gh repo clone valyala/ybc

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