ESXi setting:
Scsi.CompareLUNNumber = 0 (default 1)
If set to 0, LUN numbers will NOT be considered to identify LUNs.
Showing posts with label lun. Show all posts
Showing posts with label lun. Show all posts
Saturday, January 12, 2019
Speed up LUN discovery in VMware ESXi
VMware ESXi scans all luns from 0 to 255. However, it is possible to limit the scan to a lower number by modifying the Disk.MaxLUN parameter to improve LUN discovery speed.
Sunday, January 06, 2019
LUN Statistics in ONTAP Classic
toaster> lun stats -z
toaster> sysstat -s -i 1
CPU NFS CIFS iSCSI Net kB/s Disk kB/s iSCSI kB/s Cache
in out read write in out age
2% 0 0 0 0 0 0 0 0 0 >60
2% 0 0 0 0 0 0 0 0 0 >60
2% 0 0 4 17 1 0 0 16 0 >60
2% 0 0 0 1 0 0 0 0 0 >60
2% 0 0 0 0 0 0 0 0 0 >60
2% 0 0 0 0 0 0 0 0 0 >60
4% 0 0 1 4 0 0 818 4 0 >60
4% 0 0 0 0 0 12 32 0 0 >60
2% 0 0 0 0 0 0 0 0 0 >60
5% 0 0 7 6 1856 1747 0 0 1788 >60
3% 0 0 14 1901 38 0 0 1826 0 9
2% 0 0 2 9 1 0 0 8 0 9
2% 0 0 0 1 0 0 0 0 0 9
2% 0 0 0 0 0 0 0 0 0 9
2% 0 0 0 0 0 0 0 0 0 9
2% 0 0 0 1 0 0 0 0 0 9
2% 0 0 1 5 0 0 0 4 0 9
5% 0 0 0 0 0 0 1859 0 0 9
4% 0 0 0 0 0 0 2290 0 0 9
--
Summary Statistics ( 19 samples 1 secs/sample)
CPU NFS CIFS iSCSI Net kB/s Disk kB/s iSCSI kB/s Cache
in out read write in out age
Min
2% 0 0 0 0 0 0 0 0 0 9
Avg
2% 0 0 1 102 99 92 263 97 94 >60
Max
5% 0 0 14 1901 1856 1747 2290 1826 1788 >60
toaster> lun stats
/vol/vol0/lun1 (0 hours, 0 minutes, 30 seconds)
Read (kbytes) Write (kbytes) Read Ops Write Ops
1754 1834 7 26
toaster>
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