Thanks for the reply. Yes I could do time series sketches, but what I want actually is a summary representation of the current set, which I update over time and eventually replace entirely. It's an evented system and I want to use Theta sketches as a sort of summary. I can rebuild them entirely at any time, but if maintained live they would be a fast approximation that is combinable with other Theta sketches. Ideally I would not have to keep them all in memory to do that and could serialize and deserialize at will.
It sounds like it's not currently implemented. But if I can manage the code to do it, it is possible? On Wed, Aug 25, 2021 at 8:09 PM Alexander Saydakov < sayda...@verizonmedia.com> wrote: > Is there a good reason to necessarily update the same sketch you decided > to serialize? > I would suggest considering that sketch finalized. Perhaps, in your system > these sketches would represent different time periods or different > categories or something like that. Later on you may want to merge (union) > some of them to obtain an estimate for a longer time frame or a total > across categories and so on. > > On Wed, Aug 25, 2021 at 11:14 AM Karl Matthias <k...@community.com> wrote: > >> Hey folks, >> >> I am working with both the Java library and the C++ library and the Theta >> sketch. >> >> What I would like to do is update a sketch, save it somewhere (i.e. disk, >> etc), then reload it later and possibly update it then. The CompactSketch >> doesn't support updates when an UpdateSketch is serialized and loaded, it >> is read-only. >> >> From looking at the Java code it seems like it would be possible to >> create an UpdateSketch from the contents of a CompactSketch but there >> doesn't appear to be an existing method that does this. Am I missing >> something that already does this? Or is it not possible? >> >> Many thanks >> Karl >> >>
