Forum Discussion

chanduemandi's avatar
chanduemandi
Level 3
16 years ago

interview questions

 hi everyone
  i recently attended one interview on netbackup. i did't  answer to the following questions.
so can anyone plz help me .

1)If you wanted to know what IP address netbackup was using to perform
backups what command would you run and where would you run it?
2) How is image stored in netbackup
3) If you wanted to bypass netbackup commands and move a tape from slot
1 to drive 3 how would you do that?
4)  If your last catalog backup was two days ago and the master server
crashed what would you have to do to bring your environment back up to
present time?
5) How do you import an NBU image that has been written to a disk
storage unit?
6) Diff b.w catalog on master and media server.  What are the critical
catalogs or databases on a Media Server?
7) How would you tune NetBackup to increase backup performance?

thanks
chandu
7.1.x and Earlier
Backup and Recovery
NetBackup
  • Android's avatar
    Android
    16 years ago
    1)If you wanted to know what IP address netbackup was using to perform
    backups what command would you run and where would you run it?

    On the master run #bpclntcmd -hn clientname

    2) How is image stored in netbackup

    This really depends on what type of backup and what type of storage device you are using for the job.  The question is a little too general to answer.

    3) If you wanted to bypass netbackup commands and move a tape from slot
    1 to drive 3 how would you do that?

    You would use /usr/openv/volmgr/robtest.
    Once it starts it will take you to a CLI menu where you select which robot to use.  After than you would run mv s1 d3

    4)  If your last catalog backup was two days ago and the master server
    crashed what would you have to do to bring your environment back up to
    present time?

    Not sure about this but I'm pretty sure the answer they were looking for is restore from the most recent catalog.  Then restore from tape the most recent full and incremental jobs that were run since the last catalog backup.  This info would not be in the catalog so you'd have to check the media for which images reside where.

    5) How do you import an NBU image that has been written to a disk
    storage unit?

    During Phase I: After you initiate the import, a dialog box will appear that has a check box stating "The images to be imported are on disk".  Check this box and then provide the path to the images.

    For Phase II: From the Administration Console choose "Catalog". Under pathname, enter the disk path used for the phase 2 import. Select a date range for the images to import and search.Select Backup IDs to import. From the Actions menu select Import to begin the phase 2 import.
     

    6) Diff b.w catalog on master and media server.  What are the critical
    catalogs or databases on a Media Server?

    Not too sure about the question but I think they were referring to INSTALL_PATH/netbackup/db

    7) How would you tune NetBackup to increase backup performance?

    This would be done by tunning the number and size of buffers.  NET_BUFFER_SZ, SIZE_DATA_BUFFERS, NUMBER_DATA_BUFFERS

    But could also be done by changing other parameters such as multistreaming, multiplexing, etc.

    Anyone want to add to this?
  • Android's avatar
    Android
    Level 6
    16 years ago
    1)If you wanted to know what IP address netbackup was using to perform
    backups what command would you run and where would you run it?

    On the master run #bpclntcmd -hn clientname

    2) How is image stored in netbackup

    This really depends on what type of backup and what type of storage device you are using for the job.  The question is a little too general to answer.

    3) If you wanted to bypass netbackup commands and move a tape from slot
    1 to drive 3 how would you do that?

    You would use /usr/openv/volmgr/robtest.
    Once it starts it will take you to a CLI menu where you select which robot to use.  After than you would run mv s1 d3

    4)  If your last catalog backup was two days ago and the master server
    crashed what would you have to do to bring your environment back up to
    present time?

    Not sure about this but I'm pretty sure the answer they were looking for is restore from the most recent catalog.  Then restore from tape the most recent full and incremental jobs that were run since the last catalog backup.  This info would not be in the catalog so you'd have to check the media for which images reside where.

    5) How do you import an NBU image that has been written to a disk
    storage unit?

    During Phase I: After you initiate the import, a dialog box will appear that has a check box stating "The images to be imported are on disk".  Check this box and then provide the path to the images.

    For Phase II: From the Administration Console choose "Catalog". Under pathname, enter the disk path used for the phase 2 import. Select a date range for the images to import and search.Select Backup IDs to import. From the Actions menu select Import to begin the phase 2 import.
     

    6) Diff b.w catalog on master and media server.  What are the critical
    catalogs or databases on a Media Server?

    Not too sure about the question but I think they were referring to INSTALL_PATH/netbackup/db

    7) How would you tune NetBackup to increase backup performance?

    This would be done by tunning the number and size of buffers.  NET_BUFFER_SZ, SIZE_DATA_BUFFERS, NUMBER_DATA_BUFFERS

    But could also be done by changing other parameters such as multistreaming, multiplexing, etc.

    Anyone want to add to this?
  • DEJohn's avatar
    DEJohn
    Level 4
    16 years ago
    Only thing i can see to add is Question 6 --
    6) Diff b.w catalog on master and media server.  What are the critical
    catalogs or databases on a Media Server?
    This depends on Version of NBU
    5.1x media servers database only holds device information of what is configured on it.
    6.5 everything is on master server and EMM database I beleive they where looking for the differences in databases from master to media servers..
  • Manju's avatar
    Manju
    16 years ago
    4)  If your last catalog backup was two days ago and the master server
    crashed what would you have to do to bring your environment back up to
    present time?
    with NB 6.5, when you configure online catalog backup, you specify path where Disaster Recovery File is written each time it does a catalog backup.
    if netbackup crashes, you can check for the latest file and find out the media ID recorded in that file and recover using GUI or bprecover.