17.6 Snapshots, and Backup and Restoration of L-Servers
This section explains how to perform snapshots, and backup and restore of an L-Server.
17.6.1 Snapshot
This section provides an overview of snapshots for L-Servers.
Snapshot is the function that saves the state and configuration of an L-Server disk at the time the snapshot is taken. When using virtual L-
Servers, the snapshot function of server virtualization software is used.
Restoring a collected snapshot restores the following L-Server parameters to their state when the snapshot was taken.
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Number of CPUs
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CPU Performance
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CPU Shares
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Memory Size
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Memory Shares
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Operating System Type
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Configuration and Size of the Disk
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Network
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OS Settings
Information
The following parameters cannot be restored using the snapshot function of the server virtualization software. Therefore, change L-Server
specifications to restore those parameters using their values at the time the snapshot was taken.
[VMware]
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CPU Reserved
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CPU Shares
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Memory Reserved
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Memory Shares
[Hyper-V]
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Operating System Type
These parameters may return to their values at the time that the snapshot was taken even when the restoration process is aborted. Check
the L-Server parameters, and modify the specifications as necessary.
Note
If the OS of the L-Server is Linux, the user name and password used when collecting the snapshot will be saved.
It is recommended to change the password after collecting a snapshot to maintain security.
[VMware]
CPU reservation performance and memory reservation capacity are not restored. Changing this value may prevent an L-Server from
starting, depending on the amount of resources used by other VM guests on the same VM host.
If multiple snapshots are collected of the same L-Server, the snapshots are managed by automatically adding version numbers to the
snapshot file name starting from 1. If the number of snapshot versions exceeds the limit (standard limit is 3), the oldest snapshot will be
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