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Posted to commits@carbondata.apache.org by ja...@apache.org on 2018/08/07 13:09:51 UTC
[27/50] [abbrv] carbondata git commit: [CARBONDATA-2478] Added
datamap-developer-guide.md file to Readme.md
[CARBONDATA-2478] Added datamap-developer-guide.md file to Readme.md
[CARBONDATA-2478] Added datamap-developer-guide.md file to Readme.md
This closes #2305
Project: http://git-wip-us.apache.org/repos/asf/carbondata/repo
Commit: http://git-wip-us.apache.org/repos/asf/carbondata/commit/77642cff
Tree: http://git-wip-us.apache.org/repos/asf/carbondata/tree/77642cff
Diff: http://git-wip-us.apache.org/repos/asf/carbondata/diff/77642cff
Branch: refs/heads/external-format
Commit: 77642cfff219687f621a2d2d24fbcbdb7e8d8c52
Parents: 11fb422
Author: vandana <va...@gmail.com>
Authored: Mon May 14 15:46:19 2018 +0530
Committer: chenliang613 <ch...@huawei.com>
Committed: Thu Aug 2 11:10:57 2018 +0800
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README.md | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
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http://git-wip-us.apache.org/repos/asf/carbondata/blob/77642cff/README.md
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diff --git a/README.md b/README.md
index d8f7226..d76b080 100644
--- a/README.md
+++ b/README.md
@@ -37,9 +37,9 @@ Spark2.2:
</a>
## Features
CarbonData file format is a columnar store in HDFS, it has many features that a modern columnar format has, such as splittable, compression schema ,complex data type etc, and CarbonData has following unique features:
-* Stores data along with index: it can significantly accelerate query performance and reduces the I/O scans and CPU resources, where there are filters in the query. CarbonData index consists of multiple level of indices, a processing framework can leverage this index to reduce the task it needs to schedule and process, and it can also do skip scan in more finer grain unit (called blocklet) in task side scanning instead of scanning the whole file.
-* Operable encoded data :Through supporting efficient compression and global encoding schemes, can query on compressed/encoded data, the data can be converted just before returning the results to the users, which is "late materialized".
-* Supports for various use cases with one single Data format : like interactive OLAP-style query, Sequential Access (big scan), Random Access (narrow scan).
+* Stores data along with index: it can significantly accelerate query performance and reduces the I/O scans and CPU resources, where there are filters in the query. CarbonData index consists of multiple level of indices, a processing framework can leverage this index to reduce the task it needs to schedule and process, and it can also do skip scan in more finer grain unit (called blocklet) in task side scanning instead of scanning the whole file.
+* Operable encoded data :Through supporting efficient compression and global encoding schemes, can query on compressed/encoded data, the data can be converted just before returning the results to the users, which is "late materialized".
+* Supports for various use cases with one single Data format : like interactive OLAP-style query, Sequential Access (big scan), Random Access (narrow scan).
## Building CarbonData
CarbonData is built using Apache Maven, to [build CarbonData](https://github.com/apache/carbondata/blob/master/build)
@@ -53,6 +53,7 @@ CarbonData is built using Apache Maven, to [build CarbonData](https://github.com
* [Configuring Carbondata](https://github.com/apache/carbondata/blob/master/docs/configuration-parameters.md)
* [Streaming Ingestion](https://github.com/apache/carbondata/blob/master/docs/streaming-guide.md)
* [SDK Guide](https://github.com/apache/carbondata/blob/master/docs/sdk-guide.md)
+* [DataMap Developer Guide](https://github.com/apache/carbondata/blob/master/docs/datamap-developer-guide.md)
* [CarbonData Pre-aggregate DataMap](https://github.com/apache/carbondata/blob/master/docs/datamap/preaggregate-datamap-guide.md)
* [CarbonData Timeseries DataMap](https://github.com/apache/carbondata/blob/master/docs/datamap/timeseries-datamap-guide.md)
* [FAQ](https://github.com/apache/carbondata/blob/master/docs/faq.md)