considering Bareos for Windows 10 backup to an LTO tape drive

[Fritz Dobbs]

Hi,

I’m considering learning Bareos for this application.

I’m looking for backup software for Windows 10 64bit that will support an HP LTO-6 tape drive.

My goal is to create a quarterly backup for a 30TB NAS.  I don’t need to access the files individually.

It looks like the ltfscopy application included with the HPE StoreOpen Software might take more than 24 hours to copy and verify a 1 TB directory.

The HPE ltfscopy is only using a low single digit CPU % of an Intel(R) Xeon(R) W-1250 CPU @ 3.30GHz processor.

Would Bareos 1) use more CPU power, 2) run faster, and 3) support splitting the backup among multiple tapes?

Are there any other solutions that might be easier to implement and fit these requirements?

Thanks for your help.

[Brock Palen]

I have never used the windows director and storage only the client,

But I don’t see why not? In our setup we saturate the tape drive performance (we spool to flash storage first, but do some tape to tape copies at full speed) without issue.

Be sure you have enough network between the NAS and the system running the client and the client and the storage server. With LTO6 you would need more than 1gig ethernet.

I would also not do client compression, let the tape drive do it. Compression in Bareos is currently single threaded and anything fast enough to saturate an LTO6 drive won’t compress any better than the hardware compression, anything better will slow you down. LTO6 media is cheap anyway even if it takes an extra few tapes.

Again windows not sure if you can use btape but it should tell you your tape drive speed. Run something like diskmark or xdd to get performance to the NAS from the client. These will be your speed limit, baroes will never go faster than the underlying capabilities.

If you see bareos-fd or bareos-sd using 100% CPU with compression off, the next step would be to disable encryption on the client <-> storage connection. If you are on a lan this is probably ok. I don’t think you will need it. I do recomend using the tape encryption built into baroes though just be sure to save your key in a few places for recovery.


BTW that LTFS performance is low. It’s very different but our research archive at work is LTFS (spectrum archive) has around 7PB currently, and we saturate 19 LTO8 drives. Never used that implementation, nor do verification in LTFS.


Brock Palen
bro...@mlds-networks.com
www.mlds-networks.com
Websites, Linux, Hosting, Joomla, Consulting

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