Re: Bacula Backup Performance

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
> [email protected]
>
> On Thu, Sep 18, 2025, 8:55 AM Dragan Milivojević <[email protected]> 
> 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 <[email protected]>
>     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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