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new 6710fca fix typos
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commit 6710fca3ee492cec3e76d175a64f67a4dfdd3318
Author: helenzeng0503 <[email protected]>
AuthorDate: Thu Jan 21 09:49:32 2021 +0800
fix typos
---
website/_docs/gettingstarted/concepts.md | 48 ++++++++++++++++----------------
1 file changed, 24 insertions(+), 24 deletions(-)
diff --git a/website/_docs/gettingstarted/concepts.md
b/website/_docs/gettingstarted/concepts.md
index b93cbf9..05a5fee 100644
--- a/website/_docs/gettingstarted/concepts.md
+++ b/website/_docs/gettingstarted/concepts.md
@@ -10,55 +10,55 @@ Here are some basic technical concepts used in Apache
Kylin, please check them f
For terminology in domain, please refer to: [Terminology](terminology.html)
## CUBE
-* __Table__ - This is definition of hive tables as source of cubes, which must
be synced before building cubes.
+* __Table__ - This is the definition of hive tables as source of cubes, which
must be synced before building cubes.
-* __Data Model__ - This describes a [STAR
SCHEMA](https://en.wikipedia.org/wiki/Star_schema) data model, which defines
fact/lookup tables and filter condition.
+* __Data Model__ - This describes a [STAR
SCHEMA](https://en.wikipedia.org/wiki/Star_schema) data model, which defines
fact/lookup tables and filter conditions.
-* __Cube Descriptor__ - This describes definition and settings for a cube
instance, defining which data model to use, what dimensions and measures to
have, how to partition to segments and how to handle auto-merge etc.
+* __Cube Descriptor__ - This describes the definition and settings for a cube
instance, defining which data model to use, what dimensions and measures to
have, how to partition into segments and how to handle auto-merge, etc.
-* __Cube Instance__ - This is instance of cube, built from one cube
descriptor, and consist of one or more cube segments according partition
settings.
+* __Cube Instance__ - This is the instance of cube built from one cube
descriptor, and consists of one or more cube segments according to partition
settings.
-* __Partition__ - User can define a DATE/STRING column as partition column on
cube descriptor, to separate one cube into several segments with different date
periods.
+* __Partition__ - User can define a DATE/STRING column as partition column on
the cube descriptor to separate one cube into several segments with different
date periods.
-* __Cube Segment__ - This is actual carrier of cube data, and maps to a HTable
in HBase. One building job creates one new segment for the cube instance. Once
data change on specified data period, we can refresh related segments to avoid
rebuilding whole cube.
+* __Cube Segment__ - This is the actual carrier of cube data, and it maps to
an HTable in HBase. One building job creates one new segment for the cube
instance. Once data changes on specified date period, we can refresh related
segments to avoid rebuilding the whole cube.
-* __Aggregation Group__ - Each aggregation group is subset of dimensions, and
build cuboid with combinations inside. It aims at pruning for optimization.
+* __Aggregation Group__ - Each aggregation group is a subset of dimensions,
and cuboid are built with combinations inside. It aims at pruning for
optimization.
## DIMENSION & MEASURE
-* __Mandotary__ - This dimension type is used for cuboid pruning, if a
dimension is specified as “mandatory”, then those combinations without such
dimension are pruned.
-* __Hierarchy__ - This dimension type is used for cuboid pruning, if dimension
A,B,C forms a “hierarchy” relation, then only combinations with A, AB or ABC
shall be remained.
-* __Derived__ - On lookup tables, some dimensions could be generated from its
PK, so there's specific mapping between them and FK from fact table. So those
dimensions are DERIVED and don't participate in cuboid generation.
+* __Mandatory__ - This dimension type is used for cuboid pruning, if a
dimension is specified as “mandatory”, then those combinations without such
dimension are pruned.
+* __Hierarchy__ - This dimension type is used for cuboid pruning, if
dimensions A,B,C form a “hierarchy” relation, then only combinations with A, AB
or ABC shall be remained.
+* __Derived__ - In lookup tables, some dimensions could be generated from
their PK, so there are specific mappings between them and the FK from the fact
table. So those dimensions are DERIVED, and they don't participate in cuboid
generation.
-* __Count Distinct(HyperLogLog)__ - Immediate COUNT DISTINCT is hard to
calculate, a approximate algorithm -
[HyperLogLog](https://en.wikipedia.org/wiki/HyperLogLog) is introduced, and
keep error rate in a lower level.
-* __Count Distinct(Precise)__ - Precise COUNT DISTINCT will be pre-calculated
basing on RoaringBitmap, currently only int or bigint are supported.
-* __Top N__ - For example, with this measure type, user can easily get
specified numbers of top sellers/buyers etc.
+* __Count Distinct(HyperLogLog)__ - Immediate COUNT DISTINCT is hard to
calculate, an approximate algorithm -
[HyperLogLog](https://en.wikipedia.org/wiki/HyperLogLog) is introduced, and it
keeps the error rate in a low level.
+* __Count Distinct(Precise)__ - Precise COUNT DISTINCT will be pre-calculated
based on RoaringBitmap. Currently, only int and bigint are supported.
+* __Top N__ - For example, with this measure type, user can easily get
specified numbers of top sellers/buyers, etc.
## CUBE ACTIONS
* __BUILD__ - Given an interval of partition column, this action is to build a
new cube segment.
-* __REFRESH__ - This action will rebuilt cube segment in some partition
period, which is used in case of source table increasing.
-* __MERGE__ - This action will merge multiple continuous cube segments into
single one. This can be automated with auto-merge settings in cube descriptor.
-* __PURGE__ - Clear segments under a cube instance. This will only update
metadata, and won't delete cube data from HBase.
+* __REFRESH__ - This action will rebuild the cube segment in some partition
periods, which is used in case of source table increasing.
+* __MERGE__ - This action will merge multiple continuous cube segments into a
single one. This can be automated with the auto-merge setting in cube
descriptor.
+* __PURGE__ - Clear segments under a cube instance. This will only update the
metadata, and won't delete the cube data from HBase.
## JOB STATUS
-* __NEW__ - This denotes one job has been just created.
-* __PENDING__ - This denotes one job is paused by job scheduler and waiting
for resources.
-* __RUNNING__ - This denotes one job is running in progress.
-* __FINISHED__ - This denotes one job is successfully finished.
-* __ERROR__ - This denotes one job is aborted with errors.
-* __DISCARDED__ - This denotes one job is cancelled by end users.
+* __NEW__ - This denotes that one job has been just created.
+* __PENDING__ - This denotes that one job is paused by job scheduler and is
waiting for resources.
+* __RUNNING__ - This denotes that one job is running in progress.
+* __FINISHED__ - This denotes that one job is finished successfully.
+* __ERROR__ - This denotes that one job is aborted with errors.
+* __DISCARDED__ - This denotes that one job is cancelled by end users.
## JOB ACTION
-* __RESUME__ - Once a job in ERROR status, this action will try to restore it
from latest successful point.
-* __DISCARD__ - No matter status of a job is, user can end it and release
resources with DISCARD action.
+* __RESUME__ - Once a job is in ERROR status, this action will try to restore
it from the latest successful point.
+* __DISCARD__ - No matter what the status of a job is, users can end it and
release resources with the DISCARD action.
