A customer has installed an IBM System Storage DS8700 with 20 TB of storage, 32 GB cache, and 16 Fibre Channel ports. The customer is beginning to experience throughput performance issues since they have added new workloads. The customer asks the storage specialist for guidance. Which of the following actions should be recommended as a first step?（） install the Performance Accelerator feature。 review the DS Storage Manager Major Event Log (MEL)。 add an expansion frame with additionalFibre Channel ports。 review the latest TPC for Disk study to identify the source of the performance issue。
聚乙烯塑料管一般应用于（）管道中的埋地管道部分。 水。 燃气。 原油。 乙烯。
You have a disk group， DGROUP1， with three disks and NORMAL redundancy. You execute the following command to create a template for the disk group： ALTER DISKGROUP dgroup1 ADD TEMPLATE my_temp ATTRIBUTES （MIRROR FINE）； Which statement is true？（） When a file is created in DGROUP1 with the template， it would have three-way mirroring.。 When a file is created in DGROUP1， the MY_TEMP template becomes the default template.。 When a file is created in DGROUP1 with the template， it would have two-way mirroring and file striping.。 When a file is created in DGROUP1 with the template， it would have three-way mirroring and file striping.。 When a file is created in DGROUP1 with the template， it would have two-way mirroring but no file Striping.。
通常，小企业创立时期最主要危机是（） 资金短缺。 人才危机。 财务危机。 战略危机。
If a backup is expired， which of the following is true？（） It can never be used for a restore/recover operation.。 Oracle will remove the backup set pieces from the flash recovery area.。 The backup has been used at least once to restore and recover the database.。 The backup is no longer valid because of a resetlogs operation.。 The physical backup set pieces are missing from the media.。
Which constraint can be defined only at the column level? （）
