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
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Barlow, Richard