Bacula-users

Re: [Bacula-users] Multiple CPU core support, 100% usage while restore

2011-01-04 07:02:27
Subject: Re: [Bacula-users] Multiple CPU core support, 100% usage while restore
From: Dan Langille <dan AT langille DOT org>
To: Tom Sommer <mail AT tomsommer DOT dk>
Date: Tue, 04 Jan 2011 06:59:28 -0500
On 1/4/2011 5:00 AM, Tom Sommer wrote:
> On Tue, January 4, 2011 03:15, Dan Langille wrote:
>> On 1/3/2011 12:57 PM, Tom Sommer wrote:
>>
>>> I'm currently restoring 1.5 mill. files and it's taking forever.
>>>
>>>
>>> bacula-sd is using 100% CPU, disk IO is apparently low, so I assume
>>> it's a CPU issue.
>>>
>>> My machine has 16GB RAM and 2 CPUs:
>>>
>>>
>>> top - 18:54:53 up 75 days, 10:16,  3 users,  load average: 1.00, 1.00,
>>> 1.00
>>> Tasks: 172 total,   1 running, 171 sleeping,   0 stopped,   0 zombie
>>> Cpu0  : 85.3%us,  1.0%sy,  0.0%ni, 12.7%id,  0.0%wa,  0.0%hi,  1.0%si,
>>> 0.0%st
>>> Cpu1  :  0.0%us,  0.0%sy,  0.0%ni,100.0%id,  0.0%wa,  0.0%hi,  0.0%si,
>>> 0.0%st
>>> Cpu2  :  0.0%us,  0.0%sy,  0.0%ni,100.0%id,  0.0%wa,  0.0%hi,  0.0%si,
>>> 0.0%st
>>> Cpu3  :  0.0%us,  0.0%sy,  0.0%ni,100.0%id,  0.0%wa,  0.0%hi,  0.0%si,
>>> 0.0%st
>>> Cpu4  :  0.0%us,  0.0%sy,  0.0%ni,100.0%id,  0.0%wa,  0.0%hi,  0.0%si,
>>> 0.0%st
>>> Cpu5  :  0.0%us,  0.0%sy,  0.0%ni,100.0%id,  0.0%wa,  0.0%hi,  0.0%si,
>>> 0.0%st
>>> Cpu6  :  0.0%us,  0.0%sy,  0.0%ni,100.0%id,  0.0%wa,  0.0%hi,  0.0%si,
>>> 0.0%st
>>> Cpu7  : 11.9%us,  0.0%sy,  0.0%ni, 88.1%id,  0.0%wa,  0.0%hi,  0.0%si,
>>> 0.0%st
>>> Mem:  16429812k total, 16345744k used,    84068k free,     1272k buffers
>>>   Swap:  3124632k total,      184k used,  3124448k free,  5690688k
>>> cached
>>>
>>> PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
>>> 4014 root      18   0  109m  19m 1264 S 100.3  0.1 135:07.23 bacula-sd
>>>
>>>
>>>
>>> As you can see the process takes 100% CPU usage, on 1 core. Is there
>>> any way to make Bacula use all cores? or any other way to speed up the
>>> restore - By the looks of it, it could take days to restore the data.
>>
>> What stage of the restore is occurring?  is it building the file tree?
>> Has the restore started?
>
> It's runnning - sending the files to the server.
>
> 2 days in, it's completed 50GB of a total of ~220GB.
>
> Not really that impressive.
>
> My files are stored in blocks of 10GB.

Sounds like spooling or database index issues.  I'm guessing you are 
using MySQL and there are no spool options on your job / bacula-sd.

The database index issues have been discussed previously on this list. 
You should be able to find them.  Look at that first before thinking 
about spooling.

-- 
Dan Langille - http://langille.org/

------------------------------------------------------------------------------
Learn how Oracle Real Application Clusters (RAC) One Node allows customers
to consolidate database storage, standardize their database environment, and, 
should the need arise, upgrade to a full multi-node Oracle RAC database 
without downtime or disruption
http://p.sf.net/sfu/oracle-sfdevnl
_______________________________________________
Bacula-users mailing list
Bacula-users AT lists.sourceforge DOT net
https://lists.sourceforge.net/lists/listinfo/bacula-users