Re: major lost of performance after moving Bacula Server from Solaris to linux for Solaris clients only

Arno,

Well I finally spotted the difference between the new and old systems.

I said the old server was doing compression, but IT WAS NOT! So, as soon 
as I switch off compression on the new server I get better performance.

   Rate:                   84648.1 KB/s
   Software Compression:   None
   Comm Line Compression:  13.4% 1.2:1

I didn't spot it since the configuration files are the same and I used 
the same build setup on both platforms. For some reason the old Solaris 
server didn't set the compression on any client (clients have not been 
altered, except for passwords!). I don't see why since libz is available.

So, I have good speeds now with NO compression, but I will look into 
later why GZIP (haven't tested LZO yet) really hits performance (Solaris 
client CPU is 95% idle during backup, so not a CPU problem.)

Anyway, for now thanks,

Andrew

On 4/23/2026 3:25 PM, Arno Lehmann via Bacula-users wrote:
> Hi Andrew,
>
> just a very quick suggestion for now -- you could try disabling 
> transport encryption and compression and see if you get better 
> throughput.
>
> And one question about the change: Have you touched the client on the 
> Solaris host or the configuration (beyond changing credentials for the 
> DIR)?
>
> The reason I ask is that, as far as I recall, the openSSL and possibly 
> compression libraries on Solaris may be just slow compared to other 
> platforms.
>
> 'status client=<the-solaris-host-fd>' should give a bit of information 
> about the client build in the header, and that may become interesting 
> when we try to find out if the FD is potentially problematic.
>
> Cheers,
>
> Arno
>
> Am 23.04.2026 um 13:28 schrieb Andrew Watkins:
>> Hello,
>>
>> Have a strange one here. I have moved to a new Bacula Server and the 
>> read performance for a Solaris client is 3 times as bad.
>>
>> All other clients (Windows, Linux) are good.
>>
>> Old setup:
>>
>> Solaris Bacula 13.04 Server (slow disks for spooling) LTO5 when 
>> backing up a Solaris file server I get:
>>
>>      iostat gives me about 100Ms
>>      Bacula Backup report gives me ~ 54,664.4 KB/s
>>
>> New Setup:
>>
>> Ubuntu Bacula 13.04 Server (Fast disks for spooling) LTO9 when backup 
>> up save Solaris file server I get:
>>
>> iostat gives me about 30Ms
>> Bacula Backup report gives me ~4,661.3 KB/s
>>
>> But other clients Windows & linux are report good rates.
>>
>> The conf files are near enough the same, so any ideas why Solaris is 
>> so slow when backup up to a Linux server?
>>
>> Thanks,
>>
>> Andrew
>>
>> -- 
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>> * Andrew Watkins                                    *
>> * Birkbeck, University of London                    *
>> * Computing and Mathematical Sciences               *
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-- 
*****************************************************
*****    Support Request [email protected]    *****
*****************************************************
* Andrew Watkins                                    *
* Birkbeck, University of London                    *
* Computing and Mathematical Sciences               *
*http://notallmicrosoft.blogspot.com               *
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