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28424d73
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rocksdb
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rocksdb
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28424d73
编写于
12月 18, 2014
作者:
H
Haneef Mubarak
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电子邮件补丁
差异文件
style fixes in c example
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91c58752
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1
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1 changed file
with
23 addition
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21 deletion
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-21
examples/simple_example.c
examples/simple_example.c
+23
-21
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examples/simple_example.c
浏览文件 @
28424d73
...
@@ -9,40 +9,42 @@
...
@@ -9,40 +9,42 @@
const
char
DBPath
[]
=
"/tmp/rocksdb_simple_example"
;
const
char
DBPath
[]
=
"/tmp/rocksdb_simple_example"
;
int
main
(
int
argc
,
char
**
argv
)
{
int
main
(
int
argc
,
char
**
argv
)
{
rocksdb_t
*
db
;
rocksdb_t
*
db
;
rocksdb_options_t
*
options
=
rocksdb_options_create
();
rocksdb_options_t
*
options
=
rocksdb_options_create
();
// Optimize RocksDB. This is the easiest way to get RocksDB to perform well
// Optimize RocksDB. This is the easiest way to
int
cpus
=
sysconf
(
_SC_NPROCESSORS_ONLN
);
// get number of online cores
// get RocksDB to perform well
rocksdb_options_increase_parallelism
(
options
,
cpus
);
int
cpus
=
sysconf
(
_SC_NPROCESSORS_ONLN
);
// get # of online cores
rocksdb_options_optimize_level_style_compaction
(
options
,
0
);
rocksdb_options_increase_parallelism
(
options
,
cpus
);
rocksdb_options_optimize_level_style_compaction
(
options
,
0
);
// create the DB if it's not already present
// create the DB if it's not already present
rocksdb_options_set_create_if_missing
(
options
,
1
);
rocksdb_options_set_create_if_missing
(
options
,
1
);
// open DB
// open DB
char
*
err
=
NULL
;
char
*
err
=
NULL
;
db
=
rocksdb_open
(
options
,
DBPath
,
&
err
);
db
=
rocksdb_open
(
options
,
DBPath
,
&
err
);
assert
(
!
err
);
assert
(
!
err
);
// Put key-value
// Put key-value
rocksdb_writeoptions_t
*
writeoptions
=
rocksdb_writeoptions_create
();
rocksdb_writeoptions_t
*
writeoptions
=
rocksdb_writeoptions_create
();
const
char
key
[]
=
"key"
;
const
char
key
[]
=
"key"
;
char
*
value
=
"value"
;
char
*
value
=
"value"
;
rocksdb_put
(
db
,
writeoptions
,
key
,
strlen
(
key
),
value
,
strlen
(
value
),
&
err
);
rocksdb_put
(
db
,
writeoptions
,
key
,
strlen
(
key
),
value
,
\
assert
(
!
err
);
strlen
(
value
),
&
err
);
assert
(
!
err
);
// Get value
// Get value
rocksdb_readoptions_t
*
readoptions
=
rocksdb_readoptions_create
();
rocksdb_readoptions_t
*
readoptions
=
rocksdb_readoptions_create
();
size_t
len
;
size_t
len
;
value
=
rocksdb_get
(
db
,
readoptions
,
key
,
strlen
(
key
),
&
len
,
&
err
);
value
=
rocksdb_get
(
db
,
readoptions
,
key
,
strlen
(
key
),
&
len
,
&
err
);
assert
(
!
err
);
assert
(
!
err
);
assert
(
strcmp
(
value
,
"value"
)
==
0
);
assert
(
strcmp
(
value
,
"value"
)
==
0
);
free
(
value
);
free
(
value
);
// cleanup
// cleanup
rocksdb_writeoptions_destroy
(
writeoptions
);
rocksdb_writeoptions_destroy
(
writeoptions
);
rocksdb_readoptions_destroy
(
readoptions
);
rocksdb_readoptions_destroy
(
readoptions
);
rocksdb_options_destroy
(
options
);
rocksdb_options_destroy
(
options
);
rocksdb_close
(
db
);
rocksdb_close
(
db
);
return
0
;
return
0
;
}
}
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