#NetBackup interview Questions and Answers. I just described the answers as per my knowledge in a short term, if you need more details information you can go with Veritas.com for FAQ or help documents. You can find more detailed.
1. What is User Backup,User Archive & How to take?
Ans: User initiated backup from Backup Archive and restore window of the client interface. it backs up all the files that user specifies.
User Archive : user will take a backup , once backup is successful then the data from clients disk will be deleted and freed.
2. How do you configure a client for automatic backups?
Answer:
Automatic Backup:
An Automatic Backup schedule specifies the dates and times for NetBackup to
automatically start backups.
3. What’s the difference between diff incr and cumulative incr?
answer:
Differential incr backup: backs up files that changed from last successful backup incremental(diff and cumulative) or Full backup.
Cumulative Incr Backup: Backs up files that changed from last full backup.
4. How is a changed file determined on Unix?
Answer: The inode change time for a file or directory can be determined using ctime of a file of dir.
Check below link for more information:
https://www.veritas.com/support/en_US/article.v41780104_nbu_core_admin_web
5. in Windows server Some files are missing from both Full and INCR backup. How you can troubleshoot it ?
In the windows client’s “backup Archive and Restore” GUI check using time stamp instead of archive bit for the incrementals
6. When would I, or would I not, use cross mount points?
Ans: If you have a file list without selecting the cross mount point then, at your example, netbackup will backup only the mount point (32 Kilobytes backup) and not the files inside the mount point.
You have to select the cross mount point at the police’s attributes to backup the files inside the mount point.
Do not to select cross mount points and “ALL_LOCAL_DRIVES” together. This will give you a double backup
7. What is the difference between a Volume Group and a Volume Pool?
Ans:
==> Volume = Media i.e. tape media
==> Volume pool – Media pool (the latter may have been an older terminology used from what I was told, but generally, most people agree the two terms are used interchangeability)
8. How can i find vault TAPE ID for my clients data?
>> Once primary copy is expired vault copy will become primary copy.
bpimagelist -client clientname -d mm/dd/yyyy -e mm/dd/yyyy -media -pt Oracle -U
(where -d is start-date and -e is end-date)
9. How to check tape is in cap?
Ans: robtest -s2 -d 4
10.How to check tape is bad?
--> tape will go to FROZEN mode
11. Media has been already expired, How to find out?
Ans:
run command : bpmedialist -summary -v
or you can check the tapes going to expire soon from GUI of Netbackup console media-->Data expiration.
Note: media database (in EMM) and image database keeps record of Assigned Tapes with expiration date in the future. As soon as all images have expired, media entries are removed from mediaDB and image db during the next Image Cleanup cycle.
12. Which Are The Backup Types That Are Available In Netbackup ?
Ans:Differential Incremental Backup
Cumulative Incremental Backup
User Backup
User Archive
Full Backup
13. What is the difference between Frozen and Suspended media?
Solution:
Frozen - Netbackup application will freeze a tape if it has a problem with it, or you can freeze
it manually. A frozen tape will not be use for any more backups. A frozen tape - when it reaches
its expiration date will not show it. The images on the tape may still expire, but if you look
at the GUI or command line the tape will still show its assigned date and other info. Once the
tape is unfrozen, if all the images on the tape have expired, the tape will go to scratch.
But if NetBackup freeze the tape, then tape may be bad and you need to remove it from tape rotation.
Suspended - Netbackup application will NOT auto suspend a tape. You have to suspend the tape yourself.
(this makes it easier to tell if NB had an issue with the tape - frozen- or if you wanted to save the tape).
Once suspended the tape will not be used for any more backups it will be in readonly mode.
The big difference here is that once all the images on the tape are expired, the tape will go
unassigned and go back to scratch, avail to be overwritten by the next backup. Suspend can help
you with putting a tape in a library to do restores from, preventing it from being appended to.
But at the same time allows it to expired in a normal manner.
14. What Is The Full Form Of Dlt?
Digital-linear tape
15. What Is Image Expiration And Volume Expiration?
Image Expiration: The date and time when NetBackup stops tracking a backup image.
Volume Expiration: The date and time when the physical media (tape) is considered to be no longer usable.
16. How do you configure SLP ? what options you will have while configuring SLP? where you will select SLP for the policy to duplicate ? How the duplication starts? will it start as soon as policy backup completes ? or does the duplication has its own schedule to run ?
17. what is the difference between VSS and VSP ?
will keep update these questions Soon, come back to visit for more list....!!!
1. What is User Backup,User Archive & How to take?
Ans: User initiated backup from Backup Archive and restore window of the client interface. it backs up all the files that user specifies.
User Archive : user will take a backup , once backup is successful then the data from clients disk will be deleted and freed.
2. How do you configure a client for automatic backups?
Answer:
Automatic Backup:
An Automatic Backup schedule specifies the dates and times for NetBackup to
automatically start backups.
3. What’s the difference between diff incr and cumulative incr?
answer:
Differential incr backup: backs up files that changed from last successful backup incremental(diff and cumulative) or Full backup.
Cumulative Incr Backup: Backs up files that changed from last full backup.
4. How is a changed file determined on Unix?
Answer: The inode change time for a file or directory can be determined using ctime of a file of dir.
Check below link for more information:
https://www.veritas.com/support/en_US/article.v41780104_nbu_core_admin_web
5. in Windows server Some files are missing from both Full and INCR backup. How you can troubleshoot it ?
In the windows client’s “backup Archive and Restore” GUI check using time stamp instead of archive bit for the incrementals
6. When would I, or would I not, use cross mount points?
Ans: If you have a file list without selecting the cross mount point then, at your example, netbackup will backup only the mount point (32 Kilobytes backup) and not the files inside the mount point.
You have to select the cross mount point at the police’s attributes to backup the files inside the mount point.
Do not to select cross mount points and “ALL_LOCAL_DRIVES” together. This will give you a double backup
7. What is the difference between a Volume Group and a Volume Pool?
Ans:
==> Volume = Media i.e. tape media
==> Volume pool – Media pool (the latter may have been an older terminology used from what I was told, but generally, most people agree the two terms are used interchangeability)
8. How can i find vault TAPE ID for my clients data?
>> Once primary copy is expired vault copy will become primary copy.
bpimagelist -client clientname -d mm/dd/yyyy -e mm/dd/yyyy -media -pt Oracle -U
(where -d is start-date and -e is end-date)
9. How to check tape is in cap?
Ans: robtest -s2 -d 4
10.How to check tape is bad?
--> tape will go to FROZEN mode
11. Media has been already expired, How to find out?
Ans:
run command : bpmedialist -summary -v
or you can check the tapes going to expire soon from GUI of Netbackup console media-->Data expiration.
Note: media database (in EMM) and image database keeps record of Assigned Tapes with expiration date in the future. As soon as all images have expired, media entries are removed from mediaDB and image db during the next Image Cleanup cycle.
12. Which Are The Backup Types That Are Available In Netbackup ?
Ans:Differential Incremental Backup
Cumulative Incremental Backup
User Backup
User Archive
Full Backup
13. What is the difference between Frozen and Suspended media?
Solution:
Frozen - Netbackup application will freeze a tape if it has a problem with it, or you can freeze
it manually. A frozen tape will not be use for any more backups. A frozen tape - when it reaches
its expiration date will not show it. The images on the tape may still expire, but if you look
at the GUI or command line the tape will still show its assigned date and other info. Once the
tape is unfrozen, if all the images on the tape have expired, the tape will go to scratch.
But if NetBackup freeze the tape, then tape may be bad and you need to remove it from tape rotation.
Suspended - Netbackup application will NOT auto suspend a tape. You have to suspend the tape yourself.
(this makes it easier to tell if NB had an issue with the tape - frozen- or if you wanted to save the tape).
Once suspended the tape will not be used for any more backups it will be in readonly mode.
The big difference here is that once all the images on the tape are expired, the tape will go
unassigned and go back to scratch, avail to be overwritten by the next backup. Suspend can help
you with putting a tape in a library to do restores from, preventing it from being appended to.
But at the same time allows it to expired in a normal manner.
14. What Is The Full Form Of Dlt?
Digital-linear tape
15. What Is Image Expiration And Volume Expiration?
Image Expiration: The date and time when NetBackup stops tracking a backup image.
Volume Expiration: The date and time when the physical media (tape) is considered to be no longer usable.
16. How do you configure SLP ? what options you will have while configuring SLP? where you will select SLP for the policy to duplicate ? How the duplication starts? will it start as soon as policy backup completes ? or does the duplication has its own schedule to run ?
17. what is the difference between VSS and VSP ?
will keep update these questions Soon, come back to visit for more list....!!!
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