A server has three disks of 80GB each and must manage a database with 4 million records of 30KB each. The best configuration for this server, with the criteria being performance, configurability and flexibility, is:
A. Use just LVM
B. Use RAID1 over LVM
C. Use LVM over RAID5
D. Use LVM over RAID1
E. Use RAID5 over LVM
題解
由於伺服器有三顆硬碟,因此可以先將這三顆硬碟組成RAID-5磁碟陣列之後,再使用LVM來將其做邏輯虛擬化,如此一來伺服器的硬碟速度和硬碟空間均可以有所增長,且日後也還是可以藉由增加硬碟來繼續增加硬碟速度和硬碟空間。如果是用RAID-1的話,那麼將只會提升伺服器的硬碟讀取速度,日後增加硬碟也無法增加硬碟空間。