Approximate backup time

[tapeadmin1]

Hi,

How to calculate Approximate backup time in netbackup? I have 650 GB folder that need back up, How much time it will take to backup ?

Thank You !!

[RiaanBadenhorst · Accepted solution]

Hi,

This really depends on the source (File System, DB, Large Files/Small Files, Speed of your disks), the transport (LAN/SAN) and the target (LTO2, LTO3, LTO4. etc)

Ball park figures, 25 Mbps will give you about 90GB in an hour, 50 Mbps about 180GB, 75 Mbps about 270 GB

So at 25 you're looking at around 7 hours, and 50 around 3.5.

It all depends on the factors listed above.

[Marianne]

How fast can data be read from disk?

How fast can data be sent over the network to media server?

Drive specs - how fast can the tape drive write the data?

All of these factors need to be taken into account - I have seen in the same environment how one client backs up at over 100 Mb/s and another at less that 10....

Do a test with a smaller sub-set of the data.

[tapeadmin1]

Normal backups are running on the client at 9695 KB per sec

[RiaanBadenhorst]

Hi,

Like we said, it depends on many factors. The current speed you might be seeing could be because you're only backing up the O/S, or the data is located on slow disk, or you have issue with your network, or you simply have a 100Mbps LAN, etc etc.

Unfortunately there are too many factors involved..... (at that speed you're looking at around 18 hours)

[tapeadmin1]

Thanks ! Is there any formula to calc this ?

[RiaanBadenhorst]

Data Set in GB * 1024

-------------------------         =        Time to backup in Hours

Speed in Mbps * 3600