GitHub user xuchuanyin opened a pull request:
https://github.com/apache/carbondata/pull/1792
[CARBONDATA-2018][DataLoad] Optimization in reading/writing for sort temp
row
pack the no-sort fields in the row as a byte array during merge sort
to save CPU consumption
I've tested it in my cluster and seen about 8% performance gained
(74MB/s/Node -> 81MB/s/Node) in data loading. Please note that global_sort will
not gain benefit from this feature since there are no sort temp file in that
procedure.
Be sure to do all of the following checklist to help us incorporate
your contribution quickly and easily:
- [x] Any interfaces changed?
`Some internal used interface has been changed`
- [x] Any backward compatibility impacted?
`No`
- [x] Document update required?
`No`
- [x] Testing done
Please provide details on
- Whether new unit test cases have been added or why no new tests
are required?
`No`
- How it is tested? Please attach test report.
`Tested in 3-node cluster with real business data`
- Is it a performance related change? Please attach the performance
test report.
`Yes, I've tested it in my cluster and seen about 8% performance gained
(74MB/s/Node -> 81MB/s/Node) in data loading.`
- Any additional information to help reviewers in testing this
change.
`No`
- [x] For large changes, please consider breaking it into sub-tasks under
an umbrella JIRA.
`Unrelated`
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/xuchuanyin/carbondata
opt_sort_temp_serializeation
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/carbondata/pull/1792.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #1792
----
commit 1cf4efbd5f3065cb996fa4d6a133df68f2cca585
Author: xuchuanyin <xuchuanyin@...>
Date: 2018-01-10T12:39:02Z
pack no sort fields
pack the no-sort fields in the row as a byte array during merge sort
to save CPU consumption
----
---
