Reference Guide

Example: A Scality RING that consists of one 800 GB SSD and fifteen 8 TB HDDs, has a raw storage
capacity ratio of .8TB/120TB = 0.666 percent per Physical Server. Consult your certified Scality sales
team for detailed capacity planning.
Use the tool scaldiskadd to add disks to the available capacity. Download the script from the Scality
documentation web site, in the left pane, select Operations > Monitoring > Disk Management Interface.
Note: Drives and SSDs need to be a RAID 0 and mounted in the Linux system prior to being added using
the scaldiskadd command.
4.3.2 To add Physical Servers to increase Scality RING capacity
Increase capacity by adding additional Dell SD7000-S servers to the Scality RING. Each Dell SD7000-S
provides two Physical Servers, where each is connected to 45 drive slots available for HDD and SSD. Only
add additional Physical Servers when all Physical Servers are at full capacity. When existing servers reach
full capacity, you can add one or more full capacity SD7000-S to the Scality RING.
Consult your certified Scality sales team for detailed capacity planning.
For information on adding Physical Servers see the Scality documentation web site, in the right pane,
select Overview > What is Scality Ring. Additional configuration information is located here. In the left
pane, select Install and Configure > Configuration> Configuring a RING, or in the left pane, select
Operations > How to > Ring How To.
4.4 Joining nodes to the Scality RING
Automatically configure and add virtual servers (nodes) to Scality RING storage. For more information, see
the Scality documentation web site, in the left pane select Operations > Scripts > Join Nodes to Ring
(Scality-auto-join.sh).
4.5 Removing storage nodes
To retire a Physical Server, you must shut down the server. Scality recommends that prior to physically
removing the server, from the Supervisor Web UI, select the Leave command for each of its nodes and
then the Stop command for the Physical Server.
Note: Nodes are automatically forced to leave the Scality RING if all the disks to which they have access
are marked as full or out of service. This allows the Scality RING to isolate problem disks and redistribute
objects and replicas to other disks in the Scality RING.
For more information on the Leave command, see Scality documentation. In the left pane, select
Overview > Ring Supervisor > Supervisor Web UI > Supervisor Operation Window.
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