[RESOLVED] Planned Maintenance on Cloud Cluster – Cloud software upgrades.

During the week commencing 28/06/21 we will be performing essential software upgrades to the cloud software on all of the hardware nodes which make up the cloud cluster.
This will require the VPS servers on each node to be migrated to an alternate node causing around 1-2 minutes of downtime per server.
The hardware nodes also contain SSD storage for the cluster. There are 3 copies of all data, so when we shut down the node, the VPS servers will continue to function normally with data from the other two data copies.
The cluster will, however, start replicating all of the data on the stopped hardware in order to maintain 3 copies and will spread that data around all of the other nodes.
This replication of data will cause a high load on the storage cluster causing higher than normal data access latency. This may cause some higher than normal load on the VPS servers until the replication process is completed.
Therefore, during this maintenance, the VPS servers should be considered at risk of higher than normal load and increased response times.

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