Huawei OceanStor 2000 V3 Series Features Manual page 99

OceanStor V3 Series
HyperMetro Feature Guide for File
Issue 05 (2018-01-30)
Table 4-11 Storage pool advanced parameters
Parameter Description
Used Capacity When the percentage of the used capacity of
Alarm the storage pool to the total capacity of the
Threshold (%) storage pool (the used capacity for short)
reaches the used capacity alarm threshold, the
system generates an alarm. The alarm is
generated in 3 circumstances:
– When the used capacity reaches the used
– When the used capacity alarm threshold is
– When the used capacity alarm threshold is
NOTE
If the used capacity alarm threshold is set to 85
and the used capacity reaches 85%, the system
generates an alarm informing that the capacity of
storage pool is insufficient, and when the used
capacity reaches 90%, the system generates an
alarm informing that the storage pool is running
out. If the used capacity alarm threshold is set as
91, when the used capacity reaches 93%, the
system generates an alarm informing that the
storage pool is running out.
A proper used capacity alarm threshold helps
you monitor the capacity usage of a storage
pool.
Data Migration A logical storage space with a fixed size
Granularity divided from a CKG. It is the smallest unit
(granularity) for data migration and hotspot
data statistics collection. It is also the
smallest unit for space application and release
in a storage pool. The default value 4 MB is
recommended. The value cannot be changed
after being set.
NOTE
You can configure this parameter only when RAID
levels of storage tiers are typical configuration.
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capacity alarm threshold, the system
generates an alarm informing that the
capacity of storage pool is insufficient.
not greater than 88 and the used capacity
reaches 90%, the system generates an
alarm informing that the storage pool is
running out.
not greater than 88 and the used capacity
reaches (used capacity alarm threshold
+2)%, the system generates an alarm
informing that the storage pool is running
out.
4 Configuration
Setting
[Value range]
1 to 95
[Default value]
80
[Value range]
512 KB to 64 MB
[Default value]
4 MB
91