by Hevros » Fri Aug 23, 2013 10:59 am people like this post
so as part of our testing I am doing some backup to tape jobs and some file to tape jobs.
the backup copy to tape runs at 100MB/s which is awesome but the file to tape runs a 1MB/s and that is from files on the local Veeam backup server. when I run it to backup files on another server it run at a few KB/s it took 8 hours to backup 12GB !!
I am using a HP MSL2024 library with a fibre attached LTO 5 drive at this stage it is unusable.
I presume this was tested in beta, do you have any throughput number from that testing?
by v.Eremin » Fri Aug 23, 2013 11:30 am people like this post
Hi, Stephen. Is it possible that a file to tape job, in contrast to, a backup to tape one uses hardware compression by any chance? Also, what are the files/folders that are being copied to a tape media ? .vbks? Thanks.
by Dima P. » Fri Aug 23, 2013 12:03 pm people like this post
Is it possible to do the following comparison: - Test backup to tape job - Test file to tape job, on a backup files you used during the backup to tape job
This would be much more honest comparison of speed as in this case you would be transferring to tape the same files? I am thinking that this could be an indexing issue - in case you are pushing too many single files during files to tape. Thank you.
by Dima P. » Fri Aug 23, 2013 1:00 pm people like this post
Great, So it looks like the issue arises only when backing up a bulk of small files using the file to tape job.
From this point I believe you need to contact with our support team, please open a support case and attach Veeam logs + Veeam service logs. Please update this thread with the case number so we could provide deep analysis of this problem. Thank you!
by Dima P. » Fri Aug 23, 2013 1:15 pm people like this post
I just confirmed with R&D that low transfer rate problems with running file to tape job on a large number of small files is a known issue, and we will look at addressing it in future releases. Thank you and sorry for an inconvenience!
by TommyB » Thu Aug 29, 2013 7:00 am people like this post
I have the same issue here - a backup rate of 450 kb/s over a 1Gbit Network is simply not acceptable for any kind of useful backup (14 Hours for 7.5 GB of data and this is only 18% of the whole job...)
by foggy » Wed Sep 11, 2013 1:57 pm people like this post
Sierd, as stated above, there is a known issue with slow transfer of a large number of smaller files (and you are copying more than 3 million) using file to tape job and this will be addressed in one of the following updates.