This channel is rarely used. For other channels to contact the dask community, please see https://docs.dask.org/en/stable/support.html
I just opened this issue: dask/dask-kubernetes#181 but figured someone here might know. What changed in dask-kubernetes with respect to RBAC after 0.9.1 ? I get a 403 Forbidden:
User \"system:serviceaccount:nublado-athornton:dask\" cannot get resource \"pods\" in API group \"\" in the namespace \"nublado-athornton\"" but I have what look like the right rules in my role:rules:
- apiGroups:
- ""
resources:
- pods
verbs:
- list
- create
- delete
@TomAugspurger I hope you're doing well. I've got a question for you regarding dask-ml - is there a way to prevent parallel random forest fitting from using >100% CPU? I have set
n_jobs=1 in the RandomForestRegressor() constructor, but still end up with some of my dask workers using 2000% CPU, which is looking really weird.
(It also makes me a bad citizen on our compute cluster, haha.)
FWIW, i
I've been using dask as part of an automated ML system - one RF per slice/subset of data in our database - and there's like thousands of slices.
It's super cool that Dask enables me to build this out.
That said, I get a lot of garbage collection errors whenever I'm using parallel RF on this many slices of data - is it because of overwhelming the dask scheduler?
That way other people who run into the same issue will be able to do a web search and benefit from the answer
I’m currently planning on linking to the readthedocs homepage.
Random question: When createding a new column in a dataframe by returning the results from an np.select operation dask complains that the data coming back is not supported, being of type numpy.ndarray. Doing the same in pandas (same code, just one dataframe is set up in dask, the other in pandas) works fine. Is this as expected?
Not sure of a better place for this, but I'm looking for a small example of using fastparquet that shows the advantages of defining row-groups over the default "single" row group. I'm presenting some information on file formats but don't use parquet in my day to day (I really don't even use pandas that often). Anyone have a simple code example?
@djhoese Here's a very simple example: https://gist.github.com/xhochy/0880fd0bed3a7eaca3c31bf07b6868d9 (although it uses
pyarrow)
That last time I looked, pandas loaded everything. It would be reasonable to implement that iteratively, and fastparquet does have a specific method to do that.
Is there a way to do that query without knowing that row-group 1 is where you want to look
Parquet optionally stores columns max and min values for each row-group, so maybe
an interesting blog post about designing a threaded scheduler in rust: https://tokio.rs/blog/2019-10-scheduler/
@DeanLa https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.DataFrame.explode.html (tried answering on SO)
Hi all, I have a problem which requires data to be loaded in several blocks which are then subdivided and operated on. Scatter seems like the most sensible way of accomplishing this; however, if I want loading to be executed on the cluster as well, this requires scatter from within another task. Is there a better way to accomplish this?
Hey! I'm struggling a bit with s3 & IAM roles while using dask. We have a set of workers in EC2 with instance profiles authorised to assume a role in a different account and read from a bucket. I've tried to do the assume role beforehand in boto3 and pass the session into dask, but the session object can't be pickled apparently (fails to pickle the lock). Is there a way to pull this off in Dask? Sending creds along to workers isn't the best idea ever and it would be cool if the system was able to do the assume role on the workers before trying to access s3...
Hello,
I would like to use template matching with time-series. The objective is to look for many relatively short 1d pattern in a relatively long time-series. Any suggestion on how to do this in Dask? I mean to have something like https://docs.dask.org/en/latest/dataframe-api.html#dask.dataframe.Series.corr with many
Thanks!
I would like to use template matching with time-series. The objective is to look for many relatively short 1d pattern in a relatively long time-series. Any suggestion on how to do this in Dask? I mean to have something like https://docs.dask.org/en/latest/dataframe-api.html#dask.dataframe.Series.corr with many
other and split_every equal or lower than length of other...Thanks!
Heya, hate to add to the pile of questions but I'm currently going through dask-tutorial and I am on the weather example in Ch. 2: Arrays. The computation of mean in 500x500 chunks takes 14m31s of time (not wall time), with only 1m50s of that being User time and the rest is sys. Is this a normal result? The wall time for reference is ~37s, and I am using a 12-core processor
+1 to what @martindurant said. @xavArtley @FMassin @berkgercek those are all great and valid questions. Most of the Dask maintainers don't watch this channel often. See https://docs.dask.org/en/latest/support.html for suggestions on where to ask for help
Hello,
I'm trying to load a csv file, but there are some inconsistent column types...
So while initially the file looks like bunch of 0, then its an object...
is there a way to:
a) parse through all the csv file 10gb+ and create correct dtype. (I have over 100 columns)
or
b) go through the file and summersize the type counts... for example is there 99,999 rows of int and 1 row of object...and I can just clean that row?
I'm trying to load a csv file, but there are some inconsistent column types...
So while initially the file looks like bunch of 0, then its an object...
is there a way to:
a) parse through all the csv file 10gb+ and create correct dtype. (I have over 100 columns)
or
b) go through the file and summersize the type counts... for example is there 99,999 rows of int and 1 row of object...and I can just clean that row?