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13 rows where issue = 304589831 and user = 2443309 sorted by updated_at descending
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id | html_url | issue_url | node_id | user | created_at | updated_at ▲ | author_association | body | reactions | performed_via_github_app | issue |
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382487555 | https://github.com/pydata/xarray/pull/1983#issuecomment-382487555 | https://api.github.com/repos/pydata/xarray/issues/1983 | MDEyOklzc3VlQ29tbWVudDM4MjQ4NzU1NQ== | jhamman 2443309 | 2018-04-18T18:38:47Z | 2018-04-18T18:38:47Z | MEMBER | With my last commits here, this feature is completely optional and defaults to the current behavior. I cleaned up the tests a bit further and am now ready to merge this. Baring any objections, I'll merge this on Friday. |
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Parallel open_mfdataset 304589831 | |
382157273 | https://github.com/pydata/xarray/pull/1983#issuecomment-382157273 | https://api.github.com/repos/pydata/xarray/issues/1983 | MDEyOklzc3VlQ29tbWVudDM4MjE1NzI3Mw== | jhamman 2443309 | 2018-04-17T21:41:03Z | 2018-04-17T21:41:03Z | MEMBER | I think that makes sense for now. We need to experiment with this a bit more but I don't see a problem merging the basic workflow we have now (with a minor change to the default behavior). |
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382146851 | https://github.com/pydata/xarray/pull/1983#issuecomment-382146851 | https://api.github.com/repos/pydata/xarray/issues/1983 | MDEyOklzc3VlQ29tbWVudDM4MjE0Njg1MQ== | jhamman 2443309 | 2018-04-17T21:08:29Z | 2018-04-17T21:08:29Z | MEMBER | @NicWayand - Thanks for giving this a go. Some thoughts on your problem... I'm have been using this feature for the past few days and have been seeing a speedup on datasets with many files along the lines of what I showed above. I am applying my tests on perhaps the perfect test architecture (parallel shared fs, fast interconnect, etc.). I think there are many reasons/cases where this won't work as well. |
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Parallel open_mfdataset 304589831 | |
381277673 | https://github.com/pydata/xarray/pull/1983#issuecomment-381277673 | https://api.github.com/repos/pydata/xarray/issues/1983 | MDEyOklzc3VlQ29tbWVudDM4MTI3NzY3Mw== | jhamman 2443309 | 2018-04-13T22:42:59Z | 2018-04-13T22:42:59Z | MEMBER | @rabernat - I got the tests passing here again. If you can make the time to try your example/test again, it would be great to figure out what wasn't working before. |
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Parallel open_mfdataset 304589831 | |
380257320 | https://github.com/pydata/xarray/pull/1983#issuecomment-380257320 | https://api.github.com/repos/pydata/xarray/issues/1983 | MDEyOklzc3VlQ29tbWVudDM4MDI1NzMyMA== | jhamman 2443309 | 2018-04-10T21:44:28Z | 2018-04-10T21:45:02Z | MEMBER | @rabernat - I just pushed a few more commits here. Can I ask two questions: When using the distributed scheduler, what configuration are you using? Can you try:
- If this turns out to be a corner case with the distributed scheduler, I can add a integration test for that specific use case. |
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Parallel open_mfdataset 304589831 | |
380150362 | https://github.com/pydata/xarray/pull/1983#issuecomment-380150362 | https://api.github.com/repos/pydata/xarray/issues/1983 | MDEyOklzc3VlQ29tbWVudDM4MDE1MDM2Mg== | jhamman 2443309 | 2018-04-10T15:49:06Z | 2018-04-10T15:49:06Z | MEMBER | @rabernat - my last commit(s) seem to have broken the CI so I'll need to revisit this. |
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379323343 | https://github.com/pydata/xarray/pull/1983#issuecomment-379323343 | https://api.github.com/repos/pydata/xarray/issues/1983 | MDEyOklzc3VlQ29tbWVudDM3OTMyMzM0Mw== | jhamman 2443309 | 2018-04-06T17:33:45Z | 2018-04-06T17:33:45Z | MEMBER | All the tests are passing here? Any final objectors? |
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Parallel open_mfdataset 304589831 | |
379306351 | https://github.com/pydata/xarray/pull/1983#issuecomment-379306351 | https://api.github.com/repos/pydata/xarray/issues/1983 | MDEyOklzc3VlQ29tbWVudDM3OTMwNjM1MQ== | jhamman 2443309 | 2018-04-06T16:29:15Z | 2018-04-06T16:29:15Z | MEMBER | I image there will be a small performance cost when the number of files is small. That cost is probably lost in the noise in most i/o operations. |
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379303753 | https://github.com/pydata/xarray/pull/1983#issuecomment-379303753 | https://api.github.com/repos/pydata/xarray/issues/1983 | MDEyOklzc3VlQ29tbWVudDM3OTMwMzc1Mw== | jhamman 2443309 | 2018-04-06T16:19:35Z | 2018-04-06T16:19:35Z | MEMBER |
I'm not tied to the behavior. It was suggested by @shoyer a while back. Perhaps we try this and evaluate how it works in the wild? |
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Parallel open_mfdataset 304589831 | |
376689828 | https://github.com/pydata/xarray/pull/1983#issuecomment-376689828 | https://api.github.com/repos/pydata/xarray/issues/1983 | MDEyOklzc3VlQ29tbWVudDM3NjY4OTgyOA== | jhamman 2443309 | 2018-03-27T21:59:35Z | 2018-03-27T21:59:35Z | MEMBER |
I have. See below for a simple example using this feature on Cheyenne. ```python In [1]: import xarray as xr ...: ...: import glob ...: In [2]: pattern = '/glade/u/home/jhamman/workdir/LOCA_daily/met_data/CESM1-BGC/16th/rcp45/r1i1p1//nc' In [3]: len(glob.glob(pattern)) Out[3]: 285 In [4]: %time ds = xr.open_mfdataset(pattern) CPU times: user 15.5 s, sys: 2.62 s, total: 18.1 s Wall time: 42.4 s In [5]: ds.close() In [6]: %time ds = xr.open_mfdataset(pattern, parallel=True) CPU times: user 18.4 s, sys: 5.28 s, total: 23.6 s Wall time: 30.7 s In [7]: ds.close() In [8]: from dask.distributed import Client In [9]: client = Client() clien In [10]: client Out[10]: <Client: scheduler='tcp://127.0.0.1:39853' processes=72 cores=72> In [11]: %time ds = xr.open_mfdataset(pattern, parallel=True, autoclose=True) CPU times: user 10.8 s, sys: 808 ms, total: 11.6 s Wall time: 12.4 s ``` |
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375799794 | https://github.com/pydata/xarray/pull/1983#issuecomment-375799794 | https://api.github.com/repos/pydata/xarray/issues/1983 | MDEyOklzc3VlQ29tbWVudDM3NTc5OTc5NA== | jhamman 2443309 | 2018-03-23T21:12:33Z | 2018-03-23T21:12:33Z | MEMBER |
I've skipped the offending test on appveyor for now. Objectors speak up please. I don't have a windows machine to test on and iterating via appveyor is not something a sane person does 😉. |
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Parallel open_mfdataset 304589831 | |
373245814 | https://github.com/pydata/xarray/pull/1983#issuecomment-373245814 | https://api.github.com/repos/pydata/xarray/issues/1983 | MDEyOklzc3VlQ29tbWVudDM3MzI0NTgxNA== | jhamman 2443309 | 2018-03-15T03:05:08Z | 2018-03-15T03:05:08Z | MEMBER | If anyone understands Windows file handling with Python, I'm all ears as to why this is failing on AppVeyor. I'm tempted to just skip this test there but thought I should ask for help first... |
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Parallel open_mfdataset 304589831 | |
372807932 | https://github.com/pydata/xarray/pull/1983#issuecomment-372807932 | https://api.github.com/repos/pydata/xarray/issues/1983 | MDEyOklzc3VlQ29tbWVudDM3MjgwNzkzMg== | jhamman 2443309 | 2018-03-13T20:30:49Z | 2018-03-13T20:30:49Z | MEMBER | @shoyer - I updated this to use dask.delayed. I actually like it more because I only have to call compute once. Thanks for the suggestion. |
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Parallel open_mfdataset 304589831 |
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