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Slow backup speed
I am trying to run a backup job from my ReadyNAS Business Pro box to my ReadyNAS NV box and the backups seems to be taking FOREVER. I have both of the boxes connected to a TreadNET gigabit switch via...
It's been a while since I timed rsync on the NV+. But you are getting 20 GB per hour, which I think is about right.
At that data rate, the backup should complete in about 2 days total. I think it's better to just let it complete, since stopping it now and starting over with something else (like NFS) will likely just take longer in the end.
What backup protocol are you using?
The limit is almost certainly the CPU speed of the NV platform. Rsync backups are most efficient for incremental backups, but NFS likely will be faster if you have a lot of data to move.
Is the first time you've tried this backup? If not, did it run faster before?
tecbox77 wrote:
I can't really determine the actual throughput, but it is taking forever to copy several gigabyte files.
I understand that you can't measure the actual throughput, but it would be helpful if you could give us something more than "forever". Perhaps look at the NV+ share, and see about how much progress there's been, and also tell us how long the backup job has been running.
Thanks for the reply.
This is the first time I have run this backup to the NV and I am using rsync for the backup.
I took some measurements and determined that within 1 minute 344,457,216 bytes were copied (5,740,953.6 bytes/s).
The backup has been running for over 1 day at this point and the total size to be backed up is 962GB.
Thanks again.
It's been a while since I timed rsync on the NV+. But you are getting 20 GB per hour, which I think is about right.
At that data rate, the backup should complete in about 2 days total. I think it's better to just let it complete, since stopping it now and starting over with something else (like NFS) will likely just take longer in the end.
Thanks again StephenB for taking the time to respond.
You were so right about NFS. I copied another share via NFS and there was a HUGE difference. I got almost 3 times the speed out of NFS than rsync. It seems that rsync is more CPU intensive than NFS and that was contributing to the slowness.
Thanks again for your help!
BTW, one trick with the v1 NAS is to do the full backup with NFS, then change to protocol to rsync and run it again. If the backup job is running on the v1, the rsync backups will be incremental, which is quite efficient. I'm not sure if that is also the case with OS 6, as my OS 6 NAS are fast enough that I just use rsync and don't worry about it.
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