单选题In order to ensure best read performance， which of the following indicates how large an application’s read buffer size should be if the filesystem to be read is striped across N disks using LVM striping？（）A N times the stripe unit sizeB N times the VMM minfree parameterC The same value as that of the VMM maxfree parameterD The same value as that of the VMM maxrndwrt parameter
单选题
In order to ensure best read performance， which of the following indicates how large an application’s read buffer size should be if the filesystem to be read is striped across N disks using LVM striping？（）
A
N times the stripe unit size
B
N times the VMM minfree parameter
C
The same value as that of the VMM maxfree parameter
D
The same value as that of the VMM maxrndwrt parameter
参考解析
解析：
暂无解析
相关考题：
下列程序使用系统标准输入System.in从键盘获得输入字符串，请选择正确的一项填入下列程序的横线处。 import java.io.*; public class ex26 { public static void main(String args[]) { byte buffer[] = new byte[128]; int n; try { n = for(int i = 0; i ＜ n; i++) System.out .print ( (char)buffer [i] ); catch (IOException e) { System.out.print (e); } } }A．System.in.read(buffer)B．system.in.read(buffer)C．System.in.read0D．System.in(buffer)
Which of the following RAID levels provides the BEST read and write performance？（）A、RAID 0B、RAID 1C、RAID 5D、RAID 10
In order to ensure best read performance， which of the following indicates how large an application’s read buffer size should be if the filesystem to be read is striped across N disks using LVM striping？（）A、 N times the stripe unit sizeB、 N times the VMM minfree parameterC、 The same value as that of the VMM maxfree parameterD、 The same value as that of the VMM maxrndwrt parameter
下列语句中哪条是错误的（）？A、WRITE（*，*）（I，A（I），I=1，N）B、WRITE（*，*）（N，A（I），I=1，N）C、READ（*，*）N，（A（I），I=1，N）D、READ（*，*）（N，A（I），I=1，N）
A technician notices a machine’s performance has degraded. The machine has constant errorswhen trying to read data from the drive. Which of the following should be used to repair the disk errors?（）A、DEFRAGB、MSCONFIGC、EDITD、CHKDSK
Which of the following BEST describes RAID 5？（）A、 RAID 5 is data striping across all drives.B、 RAID 5 is data striping with a dedicated parity drive.C、 RAID 5 is striped sets with two sets of parity striped across all drives.D、 RAID 5 is striped sets with parity striped across all drives.
Application A currently holds an exclusive lock on a single row and application B tries to access that row. If lock timeout is set to -1 and both applications are using isolation level RS, which of the following will occur?（）A、Applications A and B will cause a deadlock situationB、Application B will read the previous version of the rowC、Application B will read the row and see uncommitted changes made by application AD、Application B will be placed in a lock-wait state until application A releases its lock
Which of the following is TRUE for the DB2 isolation level Cursor Stability (CS)?（）A、An application process acquires at least a share lock on the current row of every cursor.B、Any row that is read during a unit of work cannot be changed by other application processes until the unit of work is complete.C、Any row changed by another application process can be read, even if the change has not been committed by that application process.D、An application process that issues the same query more than once in a unit of work will not see additional rows caused by other application processes appending new information to the database.
If an application issues the same query more than once in the same Unit of Work, which isolation level will not permit this application to see additional rows inserted by other applications?（）A、Read Stability (RS)B、Repeatable Read (RR)C、Uncommitted Read (UR)D、Cursor Stability (CS)
Application A holds an Update lock on a single row and application B is trying to read that row. If both applications are using isolation level UR, which of the following will occur?（）A、Application B will read the row.B、Applications A and B will cause a deadlock situation.C、Application B will wait until application A releases the Update lock.D、Application A will be terminated so that application B can read the row.
A disk contains several logical volumes. Which of the following commands indicates how much data is read from or written to a particular logical volume on the same disk?（）A、 sar B、 iostat C、 svmon D、 filemon
In order to determine how efficiently an application is reading and writing data， which of the following utilities will report read and write sizes on disk I/O requests？（）A、 tprofB、 iostatC、 svmonD、 filemon
You work as a Web Developer at Certkiller.com. You are in the process of creating a Webapplication using Microsoft ASP.NET 3.5. You need to ensure that the application is able to load staff information from an XML file into aDataSet instance. The XML file contains an inline schema. You have to call a method of theDataSet class in order to load the information. Identify how you can accomplish this？（）A、You should call the ReadXml method with the ReadSchema XML read mode.B、You should call the ReadXml method with the InferTypedSchema XML read mode.C、You should call the ReadXmlSchema method.D、You should call the ReadXml method with the InferSchema XML read mode.
单选题Which of the following BEST describes RAID 5？（）A RAID 5 is data striping across all drives.B RAID 5 is data striping with a dedicated parity drive.C RAID 5 is striped sets with two sets of parity striped across all drives.D RAID 5 is striped sets with parity striped across all drives.
单选题Application A currently holds an exclusive lock on a single row and application B tries to access that row. If lock timeout is set to -1 and both applications are using isolation level RS, which of the following will occur?（）AApplications A and B will cause a deadlock situationBApplication B will read the previous version of the rowCApplication B will read the row and see uncommitted changes made by application ADApplication B will be placed in a lock-wait state until application A releases its lock
单选题From the passage, one can assume that which of the following statements would best describe Hemingway’s attitude toward knowledge?AOne can learn about life only by living it fully.BA wise person will read widely in order to learn about life.CKnowledge is a powerful tool that should be reserved only for those who know how to use it.DExperience is a poor teacher.
单选题You work as a Web Developer at Certkiller.com. You are in the process of creating a Webapplication using Microsoft ASP.NET 3.5. You need to ensure that the application is able to load staff information from an XML file into aDataSet instance. The XML file contains an inline schema. You have to call a method of theDataSet class in order to load the information. Identify how you can accomplish this？（）AYou should call the ReadXml method with the ReadSchema XML read mode.BYou should call the ReadXml method with the InferTypedSchema XML read mode.CYou should call the ReadXmlSchema method.DYou should call the ReadXml method with the InferSchema XML read mode.
单选题Jane Eyre is a good book. I have read it and I decide to read it _______.Athe second timeBa second timeCtwo timeDtwo times
单选题In order to determine how efficiently an application is reading and writing data， which of the following utilities will report read and write sizes on disk I/O requests？（）A tprofB iostatC svmonD filemon
单选题While using the smit install_remove menus to remove some filesets on an AIX 5.3 server， a system administrator notices the /usr filesystem is now unnecessarily large. Which of the following actions will reduce the size of the /usr filesystem （）ABackup， unmount， remove， recreate and restore the filesystem.BBoot from mksysb tape and select Shrink filesystems on restore.CUnmount， run defragfs /usr and the reducefs -size n /usr commands.DUpdate the /image.data file with the desired size for /usr and reboot the system.
单选题In order to ensure best read performance， which of the following indicates how large an application’s read buffer size should be if the filesystem to be read is striped across N disks using LVM striping？（）A N times the stripe unit sizeB N times the VMM minfree parameterC The same value as that of the VMM maxfree parameterD The same value as that of the VMM maxrndwrt parameter
单选题A disk contains several logical volumes. Which of the following commands indicates how much data is read from or written to a particular logical volume on the same disk?（）A sar B iostat C svmon D filemon
单选题Which of the following statements is mot correct about mirroring?（）AMirroring, with the write-verify option turned on, can be used to increase performance.BMirroring is a better choice that disk-striping, for large sequential-access file system when one is looking for performance.CMirroring, with a parallel-scheduling policy, may improve I/O read-operation performance.DMirroring, with maximum inter-disk allocation policy, is used to enhance availability.
单选题Which of the following RAID levels provides the BEST read and write performance？（）ARAID 0BRAID 1CRAID 5DRAID 10
单选题A technician notices a machine’s performance has degraded. The machine has constant errorswhen trying to read data from the drive. Which of the following should be used to repair the disk errors?（）ADEFRAGBMSCONFIGCEDITDCHKDSK
单选题If an application issues the same query more than once in the same Unit of Work, which isolation level will not permit this application to see additional rows inserted by other applications?（）ARead Stability (RS)BRepeatable Read (RR)CUncommitted Read (UR)DCursor Stability (CS)
单选题Which of the following is TRUE for the DB2 isolation level Cursor Stability (CS)?（）AAn application process acquires at least a share lock on the current row of every cursor.BAny row that is read during a unit of work cannot be changed by other application processes until the unit of work is complete.CAny row changed by another application process can be read, even if the change has not been committed by that application process.DAn application process that issues the same query more than once in a unit of work will not see additional rows caused by other application processes appending new information to the database.
单选题Application A holds an Update lock on a single row and application B is trying to read that row. If both applications are using isolation level UR, which of the following will occur?（）AApplication B will read the row.BApplications A and B will cause a deadlock situation.CApplication B will wait until application A releases the Update lock.DApplication A will be terminated so that application B can read the row.