Thanks everyone for giving me a second set of eyes. I don't know how I
completely overlooked my iperf results.
When I ran an iperf test from my client to the server, the results
showed no retries. But when I ran from the server to the client I had
hundreds of retries.
I created a new patch cable and ran it to the server. problem solved.
Backups back to normal.
Thanks again!
Dave
On 9/18/25 10:48 AM, Dave Tibbetts wrote:
Rob,
Thanks man. yeah, I totally spaced on this. I'm going to check the
cable, but I've got a bunch of Cat-5E and I might just create a new
cable and go from there.
Thank you everyone. I owe you all a coffee!
Dave
On 9/18/25 10:25 AM, Rob Gerber wrote:
Whoops. I missed that. Apparently Dragan is the only one of us who
has had their coffee today.
Dragan is 100% correct. Your network speeds indicate that you have a
fast ethernet (10/100, max 100 megabits per second) network link
somewhere. As opposed to a gigabit ethernet (10/100/1000, max 1000
megabits per second, aka, 1 gbps) network.
Your speeds, as determined by iperf, clearly indicate that your
network isn't capable of going any faster than fast ethernet /
100mbps speeds, at least between your desktop and your bacula server.
Those aren't solid speeds. They're rookie numbers, unless you're
stuck on really old hardware.
Fun fact: fast ethernet was designed to capable of working with only
wires 1,2,3,6 out of 1-8 in a category 5-6 ethernet cable.
Further fun fact: gigabit ethernet requires all 8 wires to function
properly.
Final fun fact: gigabit network cards are usually capable of falling
back to 100 mbps rates if necessary. Like if, say, one of the wires
4,5,7,8 were disconnected in some cable.
I think you might have a bad patch cable. Probably between the server
and everything else.
Either way, start checking switches, nice ports, etc for any ports
that are in fast ethernet mode. Some switches change the color of the
link lights from green to orange, if a port is operating in FE mode.
Given the sudden nature of it, I really suspect a patch cable.
If you have structured cabling, a Klein tools VDV Scout Pro network
tester is dead simple to use, and reasonably affordable.
Robert Gerber
402-237-8692
r...@craeon.net
On Thu, Sep 18, 2025, 8:55 AM Dragan Milivojević
<gali...@pkm-inc.com> wrote:
If your network speed is 95 M BITS and bacula transfer rate is 11
M BYTES ...
On Thu, 18 Sept 2025 at 15:24, Dave Tibbetts <dave...@gmail.com>
wrote:
>
> Another slow backup issue and I'm hoping someone can help.
>
> I'm running Bacula 13.04 on Ubuntu 25.04.
> It's been running fine for several years over many Bacula and
OS upgrades.
>
> Suddenly on 3 August 2025, my backup speed was cut by about
half. I have a desktop that typically would run about 25 to 26
MB/s and is now running at 11.5. This is running via ethernet.
>
> I'm seeing the same with another machine that's also on
ethernet and a wireless laptop.
>
> I'm using virtual tapes in the filestor, and the bacula
director and storage are on the same machine. Again, small setup
and been very reliable.
>
> SpoolAttributes is set on for all jobs.
>
> I ran iperf from my desktop to my server and got solid numbers:
> [ ID] Interval Transfer Bitrate Retr Cwnd
> [ 5] 0.00-1.00 sec 12.4 MBytes 104 Mbits/sec 0 255
KBytes
> [ 5] 1.00-2.00 sec 11.4 MBytes 95.5 Mbits/sec 0 255
KBytes
> [ 5] 2.00-3.00 sec 11.0 MBytes 92.3 Mbits/sec 0 255
KBytes
> [ 5] 3.00-4.00 sec 11.5 MBytes 96.4 Mbits/sec 0 255
KBytes
> [ 5] 4.00-5.00 sec 10.9 MBytes 91.2 Mbits/sec 0 255
KBytes
> [ 5] 5.00-6.00 sec 11.5 MBytes 96.5 Mbits/sec 0 255
KBytes
> [ 5] 6.00-7.00 sec 10.9 MBytes 91.2 Mbits/sec 0 255
KBytes
> [ 5] 7.00-8.00 sec 11.5 MBytes 96.5 Mbits/sec 0 255
KBytes
> [ 5] 8.00-9.00 sec 11.4 MBytes 95.4 Mbits/sec 0 255
KBytes
> [ 5] 9.00-10.00 sec 11.0 MBytes 92.2 Mbits/sec 0 255
KBytes
> - - - - - - - - - - - - - - - - - - - - - - - - -
> [ ID] Interval Transfer Bitrate Retr
> [ 5] 0.00-10.00 sec 113 MBytes 95.1 Mbits/sec 0
sender
> [ 5] 0.00-10.02 sec 112 MBytes 94.1 Mbits/sec
receiver
>
> I tried using ethtool to tweak the NIC's -
>
> ethtool -K eno1 tso off gso off gro off
>
> But that didn't help.
>
>
> I went back through the Bacula archives and tried many, many
different things - none of which helped. I finally decided to
just delete the rebuild the Postgresql database and delete all
the virtual tapes.
>
> So I brought everything back up and started a backup on a brand
new catalog. Same throughput 11.5 MB/s
> Bugs-Bunny-dir JobId 1: End auto prune.
> Bugs-Bunny-dir JobId 1: No Files found to prune.
> Bugs-Bunny-dir JobId 1: Begin pruning Files.
> Bugs-Bunny-dir JobId 1: No Jobs found to prune.
> Bugs-Bunny-dir JobId 1: Begin pruning Jobs older than 1 month
16 days .
> Bugs-Bunny-dir JobId 1: Bacula Enterprise Bugs-Bunny-dir 13.0.4
(12Feb24):
> Build OS: x86_64-pc-linux-gnu-bacula-enterprise ubuntu 22.04
> JobId: 1
> Job: Backup_Bullwinkle.2025-09-17_15.58.07_17
> Backup Level: Full (upgraded from Incremental)
> Client: "Bullwinkle-fd" 15.0.3 (25Mar25)
x86_64-redhat-linux-gnu,redhat,;
> FileSet: "Bullwinkle Set" 2025-09-17 15:58:07
> Pool: "File" (From Command input)
> Catalog: "MyCatalog" (From Client resource)
> Storage: "Filestor" (From Command input)
> Scheduled time: 17-Sep-2025 15:58:07
> Start time: 17-Sep-2025 15:58:09
> End time: 18-Sep-2025 06:48:23
> Elapsed time: 14 hours 50 mins 14 secs
> Priority: 10
> FD Files Written: 145,410
> SD Files Written: 145,410
> FD Bytes Written: 618,967,362,190 (618.9 GB)
> SD Bytes Written: 618,992,689,163 (618.9 GB)
> Rate: 11588.1 KB/s
> Software Compression: 2.5% 1.0:1
> Comm Line Compression: 5.2% 1.1:1
> Snapshot/VSS: no
> Encryption: no
> Accurate: no
> Volume name(s):
Oviedo0001|Oviedo0002|Oviedo0003|Oviedo0004|Oviedo0005|Oviedo0006|Oviedo0007|Oviedo0008|Oviedo0009|Oviedo0010|Oviedo0011|Oviedo0012|Oviedo0013|Oviedo0014|Oviedo0015|Oviedo0016|Oviedo0017|Oviedo0018|Oviedo0019|Oviedo0020|Oviedo0021|Oviedo0022|Oviedo0023|Oviedo0024|Oviedo0025|Oviedo0026|Oviedo0027|Oviedo0028|Oviedo0029|Oviedo0030|Oviedo0031|Oviedo0032|Oviedo0033|Oviedo0034|Oviedo0035|Oviedo0036|Oviedo0037|Oviedo0038|Oviedo0039|
> Volume Session Id: 1
> Volume Session Time: 1758138994
> Last Volume Bytes: 7,428,533,207 (7.428 GB)
> Non-fatal FD errors: 0
> SD Errors: 0
> FD termination status: OK
> SD termination status: OK
> Termination: Backup OK
> Bugs-Bunny-sd JobId 1: Sending spooled attrs to the Director.
Despooling 40,737,115 bytes ...
> Bugs-Bunny-sd JobId 1: Elapsed time=14:49:57, Transfer
rate=11.59 M Bytes/second
>
> Is it something crazy like my FD on the desktop is 15.0.3 and
the server is running 13.04?
>
> I'm just totally out of ideas. What am I missing?
>
> Thanks,
> Dave
>
>
>
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> Bacula-users@lists.sourceforge.net
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