HP 3PAR StoreServ 7400 2-node HP 3PAR Command Line Interface Reference (OS 3.1 - Page 649
are running., and their chunklets automatically relocated to rebalance the PDs' load.
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• If one or more chunklet statistics collection processes are running, the tunepd command exits to prevent possible tunepd -chstat on processes running simultaneously. • Use the -chstat force option only when you have verified that no other tunepd processes are running. EXAMPLES In the following example, PDs with average service times exceeding 50 milliseconds are identified and their chunklets automatically relocated to rebalance the PDs' load. cli% tunepd -vvlayout -chstat -movech auto avgsvct 50 Collecting I/O statistic for physical disks (PDs) ... PdId Pos APort BPort Iops Kbps 29 1:3:3 0:4:1 1:5:1* 231.9 8668.8 Svct(ms) ---------- 87.0 IOSz(KB 37.4 The following physical disks were identified as candidates for load balancing: 29 Layout of related virtual volumes (on candidate physical disks). VvId VvName LdId LdName Avail RAID 0 admin 5 admin.usr.2 cage 1 0,2,4,6,8,10,12,14,17,19 1 vv0 8 0,2,4,6,8,10,12,14,17,19 vv0.usr.2 cage 1 2 vv1 11 vv1.usr.1 mag 5 PdId ---- 23,25,27,29 23,25,27,29 2,6,19,29 Enable statistic collection for chunklets on PD 29 Collecting statistic for chunklets of candidate PDs... Disable statistic collection for chunklets on PD 29 Statistic of chunklets of candidate PDs: PdId PdCh LdId LdName LdCh ------------ 29 20 8 vv0.usr.2 29 Iops Kbps Svct(ms) IOSz(KB) 22.8 842.7 109.9 37.0 29 19 8 vv0.usr.2 17 22.0 842.7 113.7 38.2 29 18 8 vv0.usr.2 5 7.8 282.3 117.0 36.3 29 26 11 vv1.usr.1 23 42.0 1561.6 77.0 37.2 29 25 11 vv1.usr.1 19 37.8 1401.4 70.2 37.1 29 24 11 vv1.usr.1 15 39.5 1454.1 73.3 36.8 29 23 11 vv1.usr.1 11 35.3 1333.6 73.1 37.7 29 22 11 vv1.usr.1 7 26.5 1018.1 Statistic of Logical disks of candidate PDs: PdId LdId LdName Iops Kbps Svct(ms) 29 8 vv0.usr.2 52.6 1967.8 112.5 29 11 vv1.usr.1 181.1 6768.8 74.0 76.8 IOSz(KB 37.4 37.4 38.4 Statistic of candidate physical disks: PdId Pos APort BPort Iops 29 1:3:3 0:4:1 1:5:1* 233.7 Kbps -------- 8736.6 Svct(ms) ---------- 82.7 IOSz(KB 37.4 tunepd 649