HP XP Racks - Manual (Page 92)

◦ MON: The performance monitor is operating. The tier relocation is stopped.
◦ RLM: The performance monitor and the tier relocation are operating.
•
DAT
This item displays the status of the monitor information.
◦ VAL: Valid.
◦ INV: Invalid.
◦ PND: Being calculated.
•
R(%)
This item displays the progress percentage of tier relocation.
0 to 99: Shows one of the following statuses.
◦ When the value of STS is RLC or RLM: Relocation is in progress.
◦ When the value of STS is STP or MON: Relocation is suspended at the indicated
percentage progression.
100: Shows if the relocation operation is not in progress, or the relocation is complete.
Relocation speed
Relocation speed: The page relocation speed can be set to 1(Slowest), 2(Slower), 3(Standard),
4(Faster), and 5(Fastest). The default is 3(Standard). If you want to perform tier relocation at high
speed, use the 5(Fastest) setting. If you set a speed that is slower than 3(Standard), the load to
data drives is low when tier relocation is performed.
Based on the number of the parity groups that constitute a pool, this function adjusts the number
of V-VOLs for which tier relocation can be performed at one time. Tier relocation can be performed
on as many as 32 V-VOLs in a storage system at once.
After changing the setting, the relocation speed does not change and the data drive load may not
change in the following cases:
•
The number of parity groups is very few.
•
The number of V-VOLs associated with the pool is very few.
•
Tier relocations are being performed on the multiple pools.
Monitoring modes
When you create or edit a pool, specify the Smart Tiers monitoring mode. The monitoring mode
is either the period mode or the continuous mode. If you change the mode from the one to the
other while performing the monitoring, the changed setting becomes effective when the next
monitoring will starts.
Period mode
Period mode is the default setting. If Period mode is enabled, tier range values and page relocations
are determined based solely on the monitoring data from the last complete cycle. Relocation is
performed according to any changes in I/O loads. However, if the I/O loads vary greatly,
relocation may not finish in one cycle.
Continuous mode
If Continuous Mode is enabled, by weighting the latest monitoring information and the collected
monitoring information in the past cycles, the weighted average efficiency is calculated. By
92 Configuring thin provisioning