Can cache / persist with MEMORY_AND_DISK lose data?











up vote
0
down vote

favorite












My Spark RDD is cached with StorageLevel.MEMORY_AND_DISK setting.
Event if it would be saved on memory or disk, is there any way that the RDD recompute to re-create this RDD?






apache-spark rdd







share|improve this question
























  • Please elaborate on your question. What are you referring to with "is there any way that the RDD recompute to re-create this RDD?"
    – BDA
    Nov 22 at 9:08










  • Possible duplicate of Spark Dataframe.cache() behavior for changing source
    – user6910411
    Nov 22 at 11:17















up vote
0
down vote

favorite












My Spark RDD is cached with StorageLevel.MEMORY_AND_DISK setting.
Event if it would be saved on memory or disk, is there any way that the RDD recompute to re-create this RDD?






apache-spark rdd







share|improve this question
























  • Please elaborate on your question. What are you referring to with "is there any way that the RDD recompute to re-create this RDD?"
    – BDA
    Nov 22 at 9:08










  • Possible duplicate of Spark Dataframe.cache() behavior for changing source
    – user6910411
    Nov 22 at 11:17













up vote
0
down vote

favorite









up vote
0
down vote

favorite











My Spark RDD is cached with StorageLevel.MEMORY_AND_DISK setting.
Event if it would be saved on memory or disk, is there any way that the RDD recompute to re-create this RDD?






apache-spark rdd







share|improve this question















My Spark RDD is cached with StorageLevel.MEMORY_AND_DISK setting.
Event if it would be saved on memory or disk, is there any way that the RDD recompute to re-create this RDD?






apache-spark rdd




apache-spark rdd






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 22 at 11:17









user6910411

32.3k86693




32.3k86693










asked Nov 22 at 4:32









DK2

185216




185216












  • Please elaborate on your question. What are you referring to with "is there any way that the RDD recompute to re-create this RDD?"
    – BDA
    Nov 22 at 9:08










  • Possible duplicate of Spark Dataframe.cache() behavior for changing source
    – user6910411
    Nov 22 at 11:17


















  • Please elaborate on your question. What are you referring to with "is there any way that the RDD recompute to re-create this RDD?"
    – BDA
    Nov 22 at 9:08










  • Possible duplicate of Spark Dataframe.cache() behavior for changing source
    – user6910411
    Nov 22 at 11:17
















Please elaborate on your question. What are you referring to with "is there any way that the RDD recompute to re-create this RDD?"
– BDA
Nov 22 at 9:08




Please elaborate on your question. What are you referring to with "is there any way that the RDD recompute to re-create this RDD?"
– BDA
Nov 22 at 9:08












Possible duplicate of Spark Dataframe.cache() behavior for changing source
– user6910411
Nov 22 at 11:17




Possible duplicate of Spark Dataframe.cache() behavior for changing source
– user6910411
Nov 22 at 11:17

















active

oldest

votes











Your Answer






StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");

StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);

StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});

function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});


}
});














draft saved

draft discarded


















StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53423935%2fcan-cache-persist-with-memory-and-disk-lose-data%23new-answer', 'question_page');
}
);

Post as a guest















Required, but never shown






























active

oldest

votes













active

oldest

votes









active

oldest

votes






active

oldest

votes
















draft saved

draft discarded




















































Thanks for contributing an answer to Stack Overflow!


  • Please be sure to answer the question. Provide details and share your research!

But avoid …



  • Asking for help, clarification, or responding to other answers.

  • Making statements based on opinion; back them up with references or personal experience.


To learn more, see our tips on writing great answers.





Some of your past answers have not been well-received, and you're in danger of being blocked from answering.


Please pay close attention to the following guidance:


  • Please be sure to answer the question. Provide details and share your research!

But avoid …



  • Asking for help, clarification, or responding to other answers.

  • Making statements based on opinion; back them up with references or personal experience.


To learn more, see our tips on writing great answers.




draft saved


draft discarded














StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53423935%2fcan-cache-persist-with-memory-and-disk-lose-data%23new-answer', 'question_page');
}
);

Post as a guest















Required, but never shown





















































Required, but never shown














Required, but never shown












Required, but never shown







Required, but never shown

































Required, but never shown














Required, but never shown












Required, but never shown







Required, but never shown







-

Popular posts from this blog

A CLEAN and SIMPLE way to add appendices to Table of Contents and bookmarks

Image
0 I found a lot of questions abount appendices and ToC. Many users want appendices to be grouped in an Appendix part, however some problems arise with ToC, hyperref, PDF viewer bookmarks, and so on. There are different solutions which require extra packages, command patching and other extra code, however none of them satisfies me. I almost found an easy way to accomplish a good result, where appendices are added to bookmarks in the right way and hyperref links point to the right page. However, the number of the "Appendix" part page is wrong (it's the number of appendix A). Is there any EASY way to fix that? This is a MWE: documentclass{book} usepackage[nottoc,notlot,notlof]{tocbibind} usepackage{hyperref} begin{document} frontmatter tableofcontents mainmatter part{First} chapter{...
Read more

Calculate evaluation metrics using cross_val_predict sklearn

Image
1 In the sklearn.model_selection.cross_val_predict page it is stated: Generate cross-validated estimates for each input data point. It is not appropriate to pass these predictions into an evaluation metric. Can someone explain what does it mean? If this gives estimate of Y (y prediction) for every Y (true Y), why can't I calculate metrics such as RMSE or coefficient of determination using these results? python scikit-learn cross-validation share | improve this question edited Nov 28 '18 at 17:52 desertnaut 20.3k 7 43 79 ...
Read more

Insert data from modal to MySQL (multiple modal on website)

Image
0 I have problem with inserting data to MySQL from modal. My modal: <a href="#" class="badge badge-pill badge-success">6 komentarzy</a> <a href="#" class="badge badge-pill badge-danger">brak komentarzy</a> <a data-toggle="modal" href="#add_desk_comm_{$desk_['desk_id']}" data-target="#add_desk_comm_{$desk_['desk_id']}" class="ediiit">(dodaj)</a> <div class="modal fade" id="add_desk_comm_{$desk_['desk_id']}" tabindex="-1" role="dialog" aria-labelledby="edit_printer" aria-hidden="true"> <div class="modal-dialog" role="document"> ...
Read more