Discussions specific to tape backups
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leithm
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fastest way to get a job to tape

Post by leithm » Dec 20, 2017 3:10 am

hi guys

split environment dpm / veeam

i find dpm a lot better at handing off jobs to tape

where i struggle with veeam gfs is its need to create synthetic backups to copy to tape if the disk job runs outside its 24hr window or some other reason

copying the entire repo to disk is not really an option ( i dont want the incrementals, tape job would be huge)

can someone please give me some ideas here? tape is a hard requirement, source is fairly low spec SAN, target is fairly low spec nas

we will basically have to drop veeam if we cant move the data quickly to tape

I could possibly replicate the NAS to another NAS and then copy to tape using veeam but seems kind of excessive

I have srv2016 & REFS fast clone

forward & reverse incremental jobs

Shestakov
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Re: fastest way to get a job to tape

Post by Shestakov » Dec 20, 2017 8:23 am

Hi Leith,
Backup to Tape job to GFS media pool doesn't always require synthetic backups.
Could you elaborate on your issue and goal?
Thanks!

leithm
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Re: fastest way to get a job to tape

Post by leithm » Dec 20, 2017 7:25 pm

Shestakov wrote:Hi Leith,
Backup to Tape job to GFS media pool doesn't always require synthetic backups.
Could you elaborate on your issue and goal?
Thanks!
Sure

When I backup a server to tape I only want to copy the VBK as I believe this would be fastest.

Originally I had all my disk jobs set as reverse incrementals as the latest restore point in the backup chain would always be the VBK. I have not yet tried to copy forward incremental to tape so don't know what happens here.

Some reasons where the tape job could not find a vbk and ends up generating one (which I assume creates lots of read,write,read,write operations hence it running at like 8mb/s)

1. monthly health checks
2. intermittent network fault (only veeam seems to have this issue) causing job to fail. quite rare though
3. some other reason for a disk job failing causing the backup window to be pushed out due to retry

I only have this problem on one site out of many running veeam but it happens to be the site with the largest data set. it is not massive though. Around 8tb split across two servers

Shestakov
Veeam Software
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Re: fastest way to get a job to tape

Post by Shestakov » Dec 20, 2017 11:32 pm

Thanks for the explanation.
First of all I would try forward incremental backup on disk and tape. It will work faster, take less space and doesn't require synthetic operations.
The only disk backup method leading to synthetic on tape is forever forward incremental.
if you want to write only .vbk files on tape, reverse incremental is the way to go. Schedule backup to tape job tun as often as source backup job and it will write only .vbks on tape with no synthetics.
Thanks!

leithm
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Re: fastest way to get a job to tape

Post by leithm » Dec 23, 2017 11:48 pm

Shestakov wrote:Thanks for the explanation.
First of all I would try forward incremental backup on disk and tape. It will work faster, take less space and doesn't require synthetic operations.
The only disk backup method leading to synthetic on tape is forever forward incremental.
if you want to write only .vbk files on tape, reverse incremental is the way to go. Schedule backup to tape job tun as often as source backup job and it will write only .vbks on tape with no synthetics.
Thanks!
I ended up doing a forward incremental synthetic full (fast clone) on the Saturday and had the GFS job run Saturday also.

This worked out very well for me

Shestakov
Veeam Software
Posts: 6033
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Re: fastest way to get a job to tape

Post by Shestakov » Dec 24, 2017 8:15 pm

Sounds good. Thanks for updating the topic.

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