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Mariadb galera tolerance to network and io latency


Recently we observed that when network and IO latency increased
significantly (and correspondingly, that bandwidth reduced significantly)
all nodes in a 3-node mariadb galera cluster reported the other nodes as

We understand that by default galera is configured to wait 6 seconds before
declaring other nodes partitioned. Is there any additional documentation on
the performance on mariadb/galera with respect to network/IO latency and
bandwidth? Are there hard limits beyond which a cluster is known to fail,
and soft limits which are known to degrade performance?


Rob and Lyle
Cloud Foundry Core Services