OCP-1Z0-053-V12.02-134题
来源:互联网 发布:php开源论坛程序 编辑:程序博客网 时间:2024/06/05 16:08
134.You are managing an Oracle Database 11g database. You want to take a backup on tape drives of
the USERS tablespace that has a single data file of 900 MB. You have tape drives of 300 MB each. To
accomplish the backup, you issued the following RMAN command:
RMAN>BACKUP
SECTION SIZE 300M
TABLESPACE users;
What configuration should be effected to accomplish faster and optimized backups by using the above
command?
A. The SBT channel must be configured, with the default parallelism setting for the SBT device set to 1.
B. The COMPATIBLE initialization parameter for the database instance must be set to at least 10.0.
C. The SBT channel must be configured, with the parallelism setting for the SBT device set to 3.
D. The SBT channel must be configured, with the MAXPIECESIZE set to 300 MB.
Answer: D
答案解析:
参考:http://docs.oracle.com/cd/E11882_01/backup.112/e10643/rcmsynta007.htm#RCMRF90025
根据Note: You cannot use SECTION SIZE
with MAXPIECESIZE
or with INCREMENTAL LEVEL 1
.这句话,说明D错误
根据RMAN channels can process each step independently and in parallel,应该选择C,可以并行备份。
SECTION SIZE
sizeSpec
Specifies the size of each backup section produced during a data file backup.By setting this parameter, RMAN can create a multisection backup. In a multisection backup, RMAN creates a backup piece that contains one file section, which is a contiguous range of blocks in a file. All sections of a multisection backup are the same size. You can create a multisection backup for a data file, but not a data file copy.
File sections enable RMAN to create multiple steps for the backup of a single large data file. RMAN channels can process each step independently and in parallel, with each channel producing one section of a multisection backup set.
If you specify a section size that is larger than the size of the file, then RMAN does not use multisection backup for the file. If you specify a small section size that would produce more than 256 sections, then RMAN increases the section size to a value that results in exactly 256 sections.
Depending on where you specify this parameter in the RMAN syntax, you can specify different section sizes for different files in the same backup job.
Note: You cannot use SECTION SIZE
with MAXPIECESIZE
or with INCREMENTAL LEVEL 1
.
- OCP-1Z0-053-V12.02-134题
- OCP-1Z0-053-V12.02-679题
- OCP-1Z0-053-V12.02-591题
- OCP-1Z0-053-V12.02-590题
- OCP-1Z0-053-V12.02-552题
- OCP-1Z0-053-V12.02-551题
- OCP-1Z0-053-V12.02-549题
- OCP-1Z0-053-V12.02-548题
- OCP-1Z0-053-V12.02-234题
- OCP-1Z0-053-V12.02-584题
- OCP-1Z0-053-V12.02-595题
- OCP-1Z0-053-V12.02-184题
- OCP-1Z0-053-V12.02-59题
- OCP-1Z0-053-V12.02-676题
- OCP-1Z0-053-V12.02-667题
- OCP-1Z0-053-V12.02-660题
- OCP-1Z0-053-V12.02-580题
- OCP-1Z0-053-V12.02-323题
- php中的namespace 与java中的package
- UVA 11029 Leading and Trailing
- Android采用SharedPreferences保存用户登录信息
- Linux设备模型分析之device(基于3.10.1内核)
- 数的机器表示的学习体会
- OCP-1Z0-053-V12.02-134题
- 数据表格
- 独自收集Cocos2d提供的字体!共57种(有对照的字体图)
- [LeetCode] Sum Root to Leaf Numbers
- 0x00000050 AGE_FAULT_IN_NONPAGED+AREA
- 串行算法并行化
- PPP协议体系的实现
- mysql索引
- sensor