Table 5-37. Storage Policies For A Multi-Site Activescale P100 - Western Digital ActiveScale X100 Installation Manual

ActiveScale™ X100 Installation Guide
k. Enter your system's geolocation information.
Tip: The system applies Location settings to all three sites; you can change any
site's settings through the ActiveScale SM later.
Tip: Street Address, City, State, and Country are optional. Default Country is
USA.
Tip: Timezone is optional; it defaults to America/Los_Angeles (UTC-8).
l. Choose a durability policy for the system.
The table below describes the durability policies and how they behave with the default value for
the small file threshold.
Warning: Once the post-login configuration wizard completes, you can no
longer change the durability policy.
Tip: Enable Small File Policy is optional; it defaults to No. The Small File
Threshold (bytes) defaults to the preset value for the storage policy you select.

Table 5-37. Storage policies for a multi-site ActiveScale P100

Policy name
Availability This policy has the highest
optimized, availability. Usable capacity will
multi-site be 56% of raw when storing large
objects.
Balanced, This policy provides balance
multi-site between usable capacity and
availability. Usable capacity will
be 61% of raw when storing large
objects.
Default, multi-
site
Description
• Large files: 18/8.
• Small files: 10/8 with a threshold 0 to 8,388,608 bytes.
• Average client large file size to avoid stranded storage:
• Storage overhead: Large files: 1.8x, Small files: 5.5x.
• Durability: Up to 24 nines.
• Read availability: Objects are retrievable even if one site is
• Large files: 18/7
• Small files: 9/7 with a threshold of 0 to 8,388,608 bytes.
• Average client large file size to avoid stranded storage:
• Storage overhead: Large files: 1.64x, Small files: 5x.
• Durability: Up to 21 nines.
• Read availability: Objects are retrievable even if one site is
Availability optimized with a small file threshold of 524,288
bytes.
Details
Default: 524,288 bytes.
645-904 KB depending on disk capacity.
unavailable and two additional drives fail..
Default: 524,288 bytes.
710-995 KB depending on disk capacity.
unavailable and one additional drive fails.
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