Linux on System z Current & Future Technology - z/VM - IBM
Linux on System z Current & Future Technology - z/VM - IBM
Linux on System z Current & Future Technology - z/VM - IBM
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<strong>IBM</strong> <str<strong>on</strong>g>Linux</str<strong>on</strong>g> and <strong>Technology</strong> CenterExtended DASD statistics• Start data collecti<strong>on</strong># dasdstat -e dasda 0.0.1234• Reset statistics counters# dasdstat -r dasda• Read summary statistics# dasdstatstatistics data for statistic: 0.0.6527start time of data collecti<strong>on</strong>: Fri Feb 24 16:00:19 CET 20121472 dasd I/O requestswith 14896 sectors(512B each)0 requests used a PAV alias device0 requests used HPF__4GHistogram of sizes (512B secs)0 0 1441 8 13 5 2 2 0 1 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0Histogram of I/O times (microsec<strong>on</strong>ds)0 0 0 0 0 0 1 1160 49 52 61 142 7 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 034© 2012 <strong>IBM</strong> Corporati<strong>on</strong>
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