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Message LevelsThese messages appear at the announcement level. Additional debug level messages appear in the syslog. |
Driver Message Tab
dmesg (driver message) prints the message buffer of the kernel. These driver messages are useful for diagnosing a Swarm issue when a system panic or error occurs.
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Limited to 1000dmesg is a circular buffer; it shows the last 1000 kernel messages. |
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Hardware Info Tab
hwinfo (hardware information) is the Linux hardware detection tool output. This tool probes for the hardware present in the system and displays detailed information about various hardware components in human-readable format.
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Sends replica checks to the other nodes and adds or trims replicas based on responses
Deletes streams requiring deletion according to life points
Provides a safety net to remove older alias and named stream versions when a newer version is found in the cluster (which can happen when nodes are restored)
Checks each stream for data corruption using comparison with the stored stream hash
Moves the stream on disk if defragmentation is needed
Verifies the disk index is consistent with the streams found on disk
Verifies replicas are distributed properly in the cluster
Advanced Tab
The Advanced tab allows dynamically changing machine-level logging levels and also work with Swarm's management API, both through a hands-on HAL browser and a Swagger visualizer.
The Health Data is the raw JSON content of the health report the cluster sends to DataCore Support. See Health Data to Support.
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The log levels can be reset from this tab as well as from the Logs tab:
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The gear icon at the top of the page allows restarting or shutting down the chassis. A node shut down or rebooted by an Administrator appears with a Maintenance state on other nodes in the cluster.
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Retiring a Chassis
Retire the chassis when replacing Swarm storage volumes for regular maintenance or to upgrade the cluster chassis with higher capacity disks. Retiring a chassis copies all objects to other chassis in the cluster, allowing safe removal of the chassis disks without risking any data loss.
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Rate of the Retire: Swarm generates an announce-level message reporting the overall duration and rate of the retire when Swarm completes a retire task on a disk. (v11.0)
See https://perifery.atlassian.net/wiki/spaces/public/pages/2443811993/Retiring+Hardware#Retire-Rate.
Canceling the Retire: Click the gear icon in the row for the affected disk and select the Cancel retire command:
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Identifying a Disk
It is helpful to enable the LED disk light for the disk when attempting to identify a failed or failing disk. Click on the disk light toggle in the disk's display row to flash the disk light for a specific disk:
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