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cyberninja's avatar
cyberninja
Level 6
13 years ago

Tape usage

Hello, We just upgraded to NetBackup 7.1.0.2 and we are now useing LTO5 tapes. The proplem is we are getting a lot of tapes when we do a vault. So we think that the tapes are not being filled up. I...
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  • Mark_Solutions's avatar
    Mark_Solutions
    13 years ago

    Just looking at your figures ...

    15314.463 GB in one week = 15TB = 10 native LTO5 tapes > + allowance for different retention periods and using additional tapes which you were using 4 drives so possibly to an extra 8 tapes per week  = 10 + 8 = 18 tapes in 1 week

    You say in an early comment "Anther thing we had 23 LTO5 tapes this week, for 2 weeks. Normally under our old setup (NetBackup 5.6) we had about 8 LTO3 tapes a week. "

    From your figures it would use 36 tapes at native rates for 2 weeks - this means that they are both full and compressed (apart from the 8 part used tapes caused by 4 drives and 2 retention periods)

    Your old system used to use 8 x LTO3 tapes .... well at 2:1 compression (so 800GB per tape) 15TB would need to use 19 x LTO3 tapes.

    I think what you are seeing is actually about right - using less drives will save on tape use but your data must have grown

    Hope this helps - you are actually doing about right!

cyberninja's avatar
cyberninja
Level 6
13 years ago

We have about 17 different vault jobs. All of the jobs have 4 drives available to them. We are looking at the jobs in the activity monitor and if the job took less then 2 hours we are changing the available drives to 2. Perhaps we can also combine some of the Vault  

One of the Vault jobs took 20hrs so we will leave that one. Many of the jobs fell off the activity monitor. We will not know how this affects the jobs until the next vault in 2 weeks.

Thanks.