Amanda-Users

Re: amdump performance problem

2007-03-07 19:14:43
Subject: Re: amdump performance problem
From: Kenneth Berry <kberry AT microbeef DOT com>
To: Joshua Baker-LePain <jlb17 AT duke DOT edu>
Date: Wed, 07 Mar 2007 18:05:07 -0600
Here are the corrected bonnie++ results.
1.)
Below are bonnie results on mbthome:/home/public this is on a percraid
controller handled as a single 300GB HDD with LVM allocating the space
to the following filesystems /home, /home/public/,
and /home/public/Ausk...  The dump rate last night for this single drive
varied from 1030.7KB/sec to 9257.3 KB/sec depending on the DLE.

Version  1.03       ------Sequential Output------ --Sequential Input- --Random-
                    -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine        Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP  /sec %CP
mbthome.micro 8000M 28458  96 50469  33 19401  11 24847  76 60822  14 287.8   1
                    ------Sequential Create------ --------Random Create--------
                    -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
              files  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP
                 16  2264  97 +++++ +++ +++++ +++  2261  95 +++++ +++  4866 100
mbthome.microbeef.com,8000M,28458,96,50469,33,19401,11,24847,76,60822,14,287.8,1,16,2264,97,+++++,+++,+++++,+++,2261,95,+++++,+++,4866,100


2.)
Below are the bonnie results on mbthome:/amanda2 this one of the two
active amanda holding disk locations.  This is the same percraid
controller card as above but the file system is a LVM built on a RAID5
consisting of a set of 4 disks.
Version  1.03       ------Sequential Output------ --Sequential Input- --Random-
                    -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine        Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP  /sec %CP
mbthome.micro 8000M 27073  87 27785  18 16117   9 27170  73 42742   9 449.5   2
                    ------Sequential Create------ --------Random Create--------
                    -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
              files  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP
                 16  2360  99 +++++ +++ +++++ +++  2326  99 +++++ +++  4808  98
mbthome.microbeef.com,8000M,27073,87,27785,18,16117,9,27170,73,42742,9,449.5,2,16,2360,99,+++++,+++,+++++,+++,2326,99,+++++,+++,4808,98

3.)
Below are bonnie results for mbthome:/amanda one of the two holding disk
that the amanda.conf file is using.  On a megaraid scsi controller
connected to external single disk volume (/dev/sdd1);
Version  1.03       ------Sequential Output------ --Sequential Input- --Random-
                    -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine        Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP  /sec %CP
mbthome.micro 8000M 29962  97 38914  25 20923  12 27870  73 74745  17 256.0   1
                    ------Sequential Create------ --------Random Create--------
                    -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete--
              files  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP  /sec %CP
                 16  2298  99 +++++ +++ +++++ +++  2215  95 +++++ +++  4981 100
mbthome.microbeef.com,8000M,29962,97,38914,25,20923,12,27870,73,74745,17,256.0,1,16,2298,99,+++++,+++,+++++,+++,2215,95,+++++,+++,4981,100



Regards,

Kenneth Berry

On Wed, 2007-03-07 at 16:03 -0500, Joshua Baker-LePain wrote:
> On Wed, 7 Mar 2007 at 2:30pm, Kenneth Berry wrote
> 
> >              -------Sequential Output-------- ---Sequential Input--
> > --Random--
> >              -Per Char- --Block--- -Rewrite-- -Per Char- --Block---
> > --Seeks---
> > Machine    MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %
> > CPU  /sec %CPU
> >         1000 31610 98.7 62640 33.1 52888 21.3 37878 100.0 933421 100.0
> > 44261.0 192.5
> 
> For any sort of disk benchmarking, your test set should be at least 4X 
> the amount of RAM in the system,.  So, unless this system only has 256MB 
> of RAM, you need to re-run bonnie with a bigger working set.
> 
-- 
Kenneth Berry
Systems Engineer / System Administrator
Micro Beef Technologies
P.O. Box 9262
Amarillo, Texas 79105
806-372-2369
kberry AT microbeef DOT com

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