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ActiveScale™ X100 Installation Guide
Note: A multi-site deployment is a single global name-space across three sites.
If you have two separate sites in a replication setup, see the storage policies for
single site deployments.
Table 5-38. Storage policies for a multi-site ActiveScale X100
Policy name
Availability
This policy has the highest
optimized,
availability. When a single site is
multi-site
offline and up to two drives fail in
the remaining sites, all data is still
available. It provides a usable
capacity of 56% of the raw disk
capacity. The system will self-heal
up to eight simultaneously failed
drives.
Balanced,
This policy provides balance
multi-site
between usable capacity and
availability. When a single site is
offline and one drive fails in the
remaining sites, all data is still
available. It provides a usable
capacity of 61% of the raw disk
capacity. The system will self- heal
up to seven simultaneously failed
drives.
Default, multi-
site
A multi-site deployment is a single global namespace across three sites. If you have two separate sites in a replication setup, see the storage policies for single site
deployments.
Description
• Large files: 18/8.
• Small files: 10/8 with a threshold of 0 to 8,388,608 bytes.
• Average object size: 634-888 KB depending on disk
• Overhead: Large files: 1.8x, Small files: 5.5x.
• Durability: Up to 31 nines.
• Availability: Data is available even if one site is
• Large files: 18/7.
• Small files: 9/7 with a threshold of 0 to 8,388,608 bytes.
• Average object size: 698-977 KB depending on disk
• Overhead: Large files: 1.64x, Small files: 5x.
• Durability: Up to 27 nines.
• Availability: Data is available even if one site is
Availability optimized with a small file threshold of 524,288
bytes.
Details
Default: 524,288.
capacity.
unavailable and two additional drives fail.
Default: 524,288.
capacity.
unavailable and one additional drive fails.
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