This looks like it needs to be plotted into a histogram so you can see the regular distribution of the values.
Richard Barlow
Senior Systems Engineer
NetApp
804.929.2500
----- Original Message -----
From: Filip Sneppe <filip.sneppe@gmail.com>
To: NetApp list <toasters@mathworks.com>
Sent: Wed Feb 04 10:52:01 2009
Subject: read_align_histo.XX/write_align_histo.XX output from stats command
Hi,
This article:
https://now.netapp.com/Knowledgebase/solutionarea.asp?id=kb24492
talks about troublshooting LUN alignment issues. It mentions some
statistics one can get from
the stats command. Does anyone know how to interpret these, eg.:
lun:/vol/esx_lun_data1/luns/esx_lun1.lun-P3NsiJNHOSbN:read_align_histo.0:5%
lun:/vol/esx_lun_data1/luns/esx_lun1.lun-P3NsiJNHOSbN:read_align_histo.1:0%
lun:/vol/esx_lun_data1/luns/esx_lun1.lun-P3NsiJNHOSbN:read_align_histo.2:0%
lun:/vol/esx_lun_data1/luns/esx_lun1.lun-P3NsiJNHOSbN:read_align_histo.3:0%
lun:/vol/esx_lun_data1/luns/esx_lun1.lun-P3NsiJNHOSbN:read_align_histo.4:0%
lun:/vol/esx_lun_data1/luns/esx_lun1.lun-P3NsiJNHOSbN:read_align_histo.5:0%
lun:/vol/esx_lun_data1/luns/esx_lun1.lun-P3NsiJNHOSbN:read_align_histo.6:0%
lun:/vol/esx_lun_data1/luns/esx_lun1.lun-P3NsiJNHOSbN:read_align_histo.7:81%
lun:/vol/esx_lun_data1/luns/esx_lun1.lun-P3NsiJNHOSbN:write_align_histo.0:2%
lun:/vol/esx_lun_data1/luns/esx_lun1.lun-P3NsiJNHOSbN:write_align_histo.1:0%
lun:/vol/esx_lun_data1/luns/esx_lun1.lun-P3NsiJNHOSbN:write_align_histo.2:0%
lun:/vol/esx_lun_data1/luns/esx_lun1.lun-P3NsiJNHOSbN:write_align_histo.3:0%
lun:/vol/esx_lun_data1/luns/esx_lun1.lun-P3NsiJNHOSbN:write_align_histo.4:0%
lun:/vol/esx_lun_data1/luns/esx_lun1.lun-P3NsiJNHOSbN:write_align_histo.5:0%
lun:/vol/esx_lun_data1/luns/esx_lun1.lun-P3NsiJNHOSbN:write_align_histo.6:0%
lun:/vol/esx_lun_data1/luns/esx_lun1.lun-P3NsiJNHOSbN:write_align_histo.7:70%
lun:/vol/esx_lun_data1/luns/esx_lun1.lun-P3NsiJNHOSbN:read_partial_blocks:13%
lun:/vol/esx_lun_data1/luns/esx_lun1.lun-P3NsiJNHOSbN:write_partial_blocks:24%
How does one interpret the various *_align_histo.* counters ?
Regards,
Filip