An often overlooked piece of the puzzle is your expansion cards
Many times a system may have multiple 2x or 3x slots etc, but if you use both it cuts the speed in half (one for each card)
Make sure you research where to place the cards in your system to ensure they can operate at full speed.
Make sure you research where to place the cards in your system to ensure they can operate at full speed.
As mentioned before disk spooling will also eliminate the network bottleneck issue.
-------- Original Message --------
Subject: Re: [Bacula-users] LTO5 performance
From: Carsten Jensen <to...@tomse.dk>
Date: Thu, March 14, 2013 2:04 pm
To: bacula-users@lists.sourceforge.net
On 03/14/2013 08:32 PM, John Drescher wrote:
> On Thu, Mar 14, 2013 at 3:04 PM, Sergio Belkin <seb...@gmail.com> wrote:
>> Hi folks,
>>
>> The performance is very poor, its around 6MB/s !!!
>> The tape device is an IBM ULT3580-HH5
>>
>> Host: scsi3 Channel: 00 Id: 00 Lun: 00
>> Vendor: IBM Model: ULT3580-HH5 Rev: BBN3
>> Type: Sequential-Access ANSI SCSI revision: 06
>>
>> Bacula version is 5.2.13
>>
>> My sd daemon config:
>>
>> Storage { # definition of myself
>> Name = clair.example.edu-sd
>> SDPort = 9103 # Director's port
>> WorkingDirectory = "/usr/local/opt/bacula/working"
>> Pid Directory = "/var/run"
>> Maximum Concurrent Jobs = 20
>> }
>> Director {
>> Name = noc-dir
>> Password = "something"
>> }
>> Director {
>> Name = clair.example.edu-mon
>> Password = "something"
>> Monitor = yes
>> }
>> Device {
>> Name = LTO5
>> Media Type = LTO-4
>> Archive Device = /dev/IBMtape0n
>> AutomaticMount = yes; # when device opened, read it
>> AlwaysOpen = yes;
>> RemovableMedia = yes;
>> RandomAccess = no;
>> Maximum File Size = 200GB
>> Alert Command = "sh -c 'smartctl -d scsi -H -l error /dev/sg6'"
>> }
>> Messages {
>> Name = Standard
>> director = clair.example.edu-dir = all
>>
>>
>> Using netcat I've found that network speed is around 100 MB/s
>>
>> Could you help to find a solution?
> You need to enable spooling and to run your jobs concurrently. Also
> set the Maximum block size and Minimum block size. On top of that I
> would not have set Maximum File Size = 200GB set that to a few GB or
> leave that parameter alone.
>
> John
>
>
100Mbit network gives ~10MB/sec on an unloaded network. Practically it's
somewhere around 6-8MB/sec
so speed seems ok, specially if you have smaller files. So as John says.
use spooling.
/Carsten
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