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体验新版 GitCode,发现更多精彩内容 >>
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89328b49
编写于
10月 31, 2016
作者:
A
Alexey Milovidov
浏览文件
操作
浏览文件
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电子邮件补丁
差异文件
MergeSelector: development [#METR-21841].
上级
bee00bfc
变更
2
隐藏空白更改
内联
并排
Showing
2 changed file
with
23 addition
and
6 deletion
+23
-6
dbms/src/Storages/MergeTree/LevelMergeSelector.cpp
dbms/src/Storages/MergeTree/LevelMergeSelector.cpp
+13
-3
dbms/src/Storages/MergeTree/SimpleMergeSelector.cpp
dbms/src/Storages/MergeTree/SimpleMergeSelector.cpp
+10
-3
未找到文件。
dbms/src/Storages/MergeTree/LevelMergeSelector.cpp
浏览文件 @
89328b49
...
...
@@ -41,6 +41,7 @@ struct Estimator
void
selectWithinPartition
(
const
LevelMergeSelector
::
PartsInPartition
&
parts
,
const
size_t
max_total_size_to_merge
,
const
time_t
current_max_part_age
,
Estimator
&
estimator
,
const
LevelMergeSelector
::
Settings
&
settings
)
{
...
...
@@ -50,9 +51,9 @@ void selectWithinPartition(
double
actual_base
=
settings
.
min_parts_to_merge
;
if
(
parts
.
back
().
age
>
settings
.
lower_base_after
)
if
(
current_max_part_
age
>
settings
.
lower_base_after
)
{
actual_base
-=
log2
(
parts
.
back
().
age
-
settings
.
lower_base_after
);
actual_base
-=
log2
(
current_max_part_
age
-
settings
.
lower_base_after
);
if
(
actual_base
<
2
)
actual_base
=
2
;
}
...
...
@@ -85,6 +86,9 @@ void selectWithinPartition(
prev_level
=
part
.
level
;
}
if
(
!
has_range_of_same_level
&&
actual_base
>
2
)
return
;
for
(
size_t
level
=
0
;
level
<=
max_level
;
++
level
)
{
bool
in_range
=
false
;
...
...
@@ -141,10 +145,16 @@ LevelMergeSelector::PartsInPartition LevelMergeSelector::select(
const
Partitions
&
partitions
,
const
size_t
max_total_size_to_merge
)
{
time_t
max_age
=
0
;
for
(
const
auto
&
partition
:
partitions
)
for
(
const
auto
&
part
:
partition
)
if
(
part
.
age
>
max_age
)
max_age
=
part
.
age
;
Estimator
estimator
;
for
(
const
auto
&
partition
:
partitions
)
selectWithinPartition
(
partition
,
max_total_size_to_merge
,
estimator
,
settings
);
selectWithinPartition
(
partition
,
max_total_size_to_merge
,
max_age
,
estimator
,
settings
);
return
estimator
.
getBest
();
}
...
...
dbms/src/Storages/MergeTree/SimpleMergeSelector.cpp
浏览文件 @
89328b49
...
...
@@ -74,6 +74,7 @@ struct Estimator
void
selectWithinPartition
(
const
SimpleMergeSelector
::
PartsInPartition
&
parts
,
const
size_t
max_total_size_to_merge
,
const
time_t
current_max_part_age
,
Estimator
&
estimator
,
const
SimpleMergeSelector
::
Settings
&
settings
)
{
...
...
@@ -82,9 +83,9 @@ void selectWithinPartition(
double
actual_base
=
settings
.
base
;
if
(
parts
.
back
().
age
>
settings
.
lower_base_after
)
if
(
current_max_part_
age
>
settings
.
lower_base_after
)
{
actual_base
-=
log2
(
parts
.
back
().
age
-
settings
.
lower_base_after
);
actual_base
-=
log2
(
current_max_part_
age
-
settings
.
lower_base_after
);
if
(
actual_base
<
1
)
actual_base
=
1
;
}
...
...
@@ -148,10 +149,16 @@ SimpleMergeSelector::PartsInPartition SimpleMergeSelector::select(
const
Partitions
&
partitions
,
const
size_t
max_total_size_to_merge
)
{
time_t
max_age
=
0
;
for
(
const
auto
&
partition
:
partitions
)
for
(
const
auto
&
part
:
partition
)
if
(
part
.
age
>
max_age
)
max_age
=
part
.
age
;
Estimator
estimator
;
for
(
const
auto
&
partition
:
partitions
)
selectWithinPartition
(
partition
,
max_total_size_to_merge
,
estimator
,
settings
);
selectWithinPartition
(
partition
,
max_total_size_to_merge
,
max_age
,
estimator
,
settings
);
return
estimator
.
getBest
();
}
...
...
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