[SOLVED]Re: Bacula Backup Performance

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
>> [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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>>     > [email protected]
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>>
>>
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