Chapter Review Questions

     
1:

You have provided redundancy in your disk group configuration by utilizing Spare Disks. One of your original disks fails, and VxVM relocates the affected subdisks to the Spare Disk. Give two reasons why you would want to un-relocate the affected subdisks back to their original locations. Is it a good idea to un-relocate the subdisks as soon as the new replacement disk has been installed in your system?

2:

Your have set up a RAID 5 volume to achieve resilience without sacrificing much real disk capacity. Over time, your application is experiencing considerable IO problems due to many changes occurring in your data; that's the well-known RAID 5 read-modify-write performance bottleneck. You are willing to accept the decrease in overall storage capacity in order to convert a RAID 5 volume to a mirrored volume. You have heard that you can perform a relayout operation instead of a convert operation. Is a relayout possible from RAID 5 to a mirrored volume? Additionally, name two differences between a convert and a relayout operation.

3:

Looking at Figure 7-5, what type of layout would best describe this volume? What name would the VEA GUI interface give to this volume layout?

Figure 7-5. What is the layout of this volume?
graphics/07fig05.gif

4:

You are performing a major upgrade to your main system application. You are concerned that if the upgrade fails, you want to return the affected volumes to their previous state as quickly as possible. What two major steps could you take in order to achieve this goal (one of these should include a VxVM specific solution)? List the specific VxVM commands you would use before performing the application upgrade and the commands you would use to reinstate the previous state of the affected volumes .

5:

You have multiple Fibre Channel cards all connected through your Switch Fabric SAN to a number of LUNS on an HP XP disk array. The LUNS are part of a VxVM Disk Group. The volumes configured on the LUNS utilize RAID 1/0 via layered volumes. The volumes are used by an application that performs IO in 16KB blocks. You have tuned the stripe size for each volume to match the IO block size for the application. What can you do to ensure that VxVM DMP spreads the IO over multiple FC cards in 16KB blocks in order to spread the IO evenly through your SAN infrastructure?



HP-UX CSE(c) Official Study Guide and Desk Reference
HP-UX CSE(c) Official Study Guide and Desk Reference
ISBN: N/A
EAN: N/A
Year: 2006
Pages: 434

flylib.com © 2008-2017.
If you may any questions please contact us: flylib@qtcs.net