Discussions specific to tape backups
davidburke84
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[MERGED] Tape Backup Strategy with DeDup Appliance

Post by davidburke84 » Sep 20, 2016 5:44 pm

Current Setup:
Using a physical Veeam server with Snapshot Backups (3Par).
Backups are going to an HP StoreOnce5100 with Storage Support (no Veeam compression)
2 LTO4 tape drives
10TB of data is being backed up and dedupping down to about 3TB.

My strategy is to have 1 full month of daily backups on the appliance and do a tape job once a month on the 1st that writes the latest full backup to tape.

When I write the backups to StoreOnce I do not do Veeam's built in compression. This is per best practice since HP will do a better job of this.

My question is this:
When I write my last full backup out to tape should I use compression within the Veeam job or do best practice and leave it uncompressed?

Does anyone else have experience with this particular setup?

Thanks.

v.Eremin
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Re: LTO6 Capacity

Post by v.Eremin » Sep 21, 2016 10:23 am

When I write my last full backup out to tape should I use compression within the Veeam job or do best practice and leave it uncompressed?
It's up to you to decide which approach suites your needs best. Check the answers provided above, should give you some ideas. Thanks.

davidburke84
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Re: [MERGED] Tape Backup Strategy with DeDup Appliance

Post by davidburke84 » Oct 17, 2016 3:06 pm

For anyone that has the situation I have stated above where you're not using the native Veeam Dedup to your storage repository and you're wondering if you should use hardware compression on the tape drive. Here's what I've found:

The tape backup is being done 6 hours after the weekly synthetic full and not doing tape backup of any incrementals. The current setup is one backup every night at 10PM. This backup is ~6.5 TB of data and all going to LTO3 tapes. 2 Tape drives with parallel processing.

Without compression:
runtime was 12 hours and 5 minutes and used 19 LTO3 tapes.

With compression:
runtime was 9 hours and 30 minutes and used 12 LTO3 tapes.

Both scenarios shows the tape drive as the bottle neck. I'm going to change my jobs to use the hardware compression and will report back any issues.

Elefanten
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[MERGED] Tape LTO 4, hw compression not working ?

Post by Elefanten » Aug 14, 2017 12:19 pm

Hi

Using Veeam 9.5 and VMware 6.0
Tape Drive is LTO 4 - HP


Trying to backup the fileserver to only one tape.

Fileserver size is 956GB and have enabled the following settings :

-Reverse incremental backup job.
-Use hardware compression when available is turned on (Tape Job)
-Compression level set to None on the Backup job.

Still it could not transfer more than 850GB before it asked for second tape, i believed i could utilize the hardware compression on tape and with LTO 4 i could get closer to 1,5 TB ?
Did it not use the hardware compression at all, any chance for me to verify this ?

BR
Elefanten

v.Eremin
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Re: LTO6 Capacity

Post by v.Eremin » Aug 14, 2017 12:27 pm

Differences between both approaches (software and hardware compressions) are described above. So, kindly, take a look. Thanks.

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