# Question about scrolling **URL:** \ **Category:** Elasticsearch\ **Created:** [October 24, 2013, 11:30am UTC](https://discuss.elastic.co/t/question-about-scrolling/14091 "2013-10-24T11:30:55Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![haizaar](https://avatars.discourse-cdn.com/v4/letter/h/3d9bf3/32.png) [@haizaar](https://discuss.elastic.co/u/haizaar)\ **Post date:** [October 24, 2013, 11:30am UTC](https://discuss.elastic.co/t/question-about-scrolling/14091/1 "2013-10-24T11:30:55Z")
I want to fetch all the stored documents in ES and I see that there is a "scroll" search type to easily support this. My question is - if during the scroll, another client updates a particular document that I did not fetch yet - will I get this document as it was when I've started the scroll or an updated one? In other words, does scroll create a snapshot of the data when it starts or returns the documents as they are when it reaches them? Thanks, Zaar -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). ---
**Author:** ![Clinton\_Gormley](https://avatars.discourse-cdn.com/v4/letter/c/50afbb/32.png) [@Clinton\_Gormley](https://discuss.elastic.co/u/Clinton_Gormley)\ **Post date:** [October 24, 2013, 11:47am UTC](https://discuss.elastic.co/t/question-about-scrolling/14091/2 "2013-10-24T11:47:50Z")
Hi Zaar It takes a snapshot of the index at the time the scrolled search starts. So any later changes don't change the results of the scroll. Note: deep scrolling on a sorted result set becomes slower, the deeper you get. If you want to pull back lots of documents (eg for reindexing an index), then you should use search\_type=scan, which disables sorting and keeps deep scrolling performant clint On 24 October 2013 12:30, Zaar Hai [haizaar@gmail.com](mailto:haizaar@gmail.com) wrote: > I want to fetch all the stored documents in ES and I see that there is a > "scroll" search type to easily support this. > > My question is - if during the scroll, another client updates a particular > document that I did not fetch yet - will I get this document as it was when > I've started the scroll or an updated one? > In other words, does scroll create a snapshot of the data when it starts > or returns the documents as they are when it reaches them? > > Thanks, > Zaar > > -- > You received this message because you are subscribed to the Google Groups > "elasticsearch" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). > For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). ---
**Author:** ![haizaar](https://avatars.discourse-cdn.com/v4/letter/h/3d9bf3/32.png) [@haizaar](https://discuss.elastic.co/u/haizaar)\ **Post date:** [October 24, 2013, 11:56am UTC](https://discuss.elastic.co/t/question-about-scrolling/14091/3 "2013-10-24T11:56:51Z")
Thanks Clinton! These are excellent news. My dataset is relatively small and I still need sorting because I need documented returned ordered by their doc type (I have several dozens of doc types) - unless there is another efficient way to do it. Thanks again. Zaar On Thursday, October 24, 2013 2:47:50 PM UTC+3, Clinton Gormley wrote: > Hi Zaar > > It takes a snapshot of the index at the time the scrolled search starts. > So any later changes don't change the results of the scroll. > > Note: deep scrolling on a sorted result set becomes slower, the deeper you > get. If you want to pull back lots of documents (eg for reindexing an > index), then you should use search\_type=scan, which disables sorting and > keeps deep scrolling performant > > clint > > On 24 October 2013 12:30, Zaar Hai \<[hai...@gmail.com](mailto:hai...@gmail.com) \\> wrote: > > > I want to fetch all the stored documents in ES and I see that there is a > > "scroll" search type to easily support this. > > > > My question is - if during the scroll, another client updates a > > particular document that I did not fetch yet - will I get this document as > > it was when I've started the scroll or an updated one? > > In other words, does scroll create a snapshot of the data when it starts > > or returns the documents as they are when it reaches them? > > > > Thanks, > > Zaar > > > > -- > > You received this message because you are subscribed to the Google Groups > > "elasticsearch" group. > > To unsubscribe from this group and stop receiving emails from it, send an > > email to [elasticsearc...@googlegroups.com](mailto:elasticsearc...@googlegroups.com) \. > > For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [elasticsearch+unsubscribe@googlegroups.com](mailto:elasticsearch+unsubscribe@googlegroups.com). For more options, visit [https://groups.google.com/groups/opt\_out](https://groups.google.com/groups/opt_out). ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 6, 2017, 2:10am UTC](https://discuss.elastic.co/t/question-about-scrolling/14091/4 "2017-07-06T02:10:50Z")