Re: Debian server for backups of Windows clients
On 08/09/2016 04:27 PM, Daniel Bareiro wrote:
> As you can see, the transfer was over than 3 GB and it were not hung. I
> did several tests and all were without problems.
>
> I wonder if in the mentioned episodes of hangs you remember whether the
> transferred volume was higher or lower than in this case (or it hung
> randomly).
Script it and run it every night for a week. If it works every time,
try again for 30 days. Then 90. Then 365.
>
> As a side note, the larger file (disk01.img) took more than 40 minutes
> to be transferred. So the rsync was running quite some time without
> hanging. While it does not have to do with the topic of this thread, in
> rsync progress data we can see that the average transfer rate was 10
> Mbps. I guess it will have to do with that I'm going through a wireless
> network. In this testing the Debian computer is a notebook connected to
> the wireless router and the KVM Windows is on the wired network. May it
> be so large the decrease in transfer speed? The wireless router is
> TPLink WDR3600 with OpenWRT.
My laptop has 802.11 a/b/g WiFi and Fast Ethernet. Wireless data
transfers are slow (~50 Mbps). Wired is twice as fast (100 Mbps); still
slow. Newer WiFi (n, ac) should be faster, but only the newest WiFi
hardware can match or beat Gigabit.
For the initial full backup, I have found that scp is faster than rsync.
When I know that I've added a bunch of new and/or large files on the
sender, I sometimes try the rsync 'whole-file' option. As I haven't
benchmarked it, I don't know if/when it is helping.
My biggest problem with rsync is when I reorganize file/ directory trees
on my file server; especially big stuff -- raw video, movies, disk
images, ISO images, etc.. I have yet to figure out an rsync incantation
that does the corresponding moves on the destination, rather than
mindlessly copying and deleting 100's of GB. I have often considered
writing an rsync prelude script for just this case.
David
Reply to: