![]() Oracle's ZFS is the original, proprietary file system and volume manager created by Sun Microsystems, which Oracle acquired as part of its purchase of Sun in 2010. Oracle Cloud VMware Solution on AMD and AMD E4.Dense Compute Instances bring two OCI services to AMD processors.Īdditions to OCI Networking include the Content Delivery Network Interconnect and CDN Service, enabling new capabilities through partner CDNs, as well as a new network configuration visualizer and other security hardening features. OCI Compute's Container Instances, a managed service, enables using containers without the need to manage the hosting VM or Kubernetes orchestration. The new storage features come alongside updates to OCI Compute and OCI Networking. "Ultimately, it means users are focused on their applications and not the performance of their infrastructure." "Anything you can auto-tune will save huge amounts of time," Staimer said. While these two storage updates arriving later this month aren't showstoppers, both add functionality and greater stability for many common challenges faced by database and storage administrators, according to Marc Staimer, president of Dragon Slayer Consulting. ![]() High availability ZFS promises greater uptime for the popular file system for cloud storage, similarly taking advantage of OCI block storage for access speeds. ![]() If you think network partitions and performance problems are not really going to be an issue compared to machine crashes / reboots (probably a reasonable assumption in small-ish datacenters since these are lower-probability events), then you probably don’t need the storage-level mutual exclusion at all, and the higher-layer solution would work fine.Flexible Block Volumes enables OCI customers to alter the performance of their block storage in response to fluctuating application demand, saving OCI customers on provisioning costs, according to the company. However without support inside of ZFS for mutual exclusion, you may need to do both above the ZFS layer, for example by making a shim layer that checks for ownership before issuing a write to ZFS. Ultimately the best solution is to use high-level symptoms to decide whether to failover, but low-level mutual exclusion enforcement. To cover these cases you want to do keepalives reported by the clients that are trying to reach the storage over the network, rather than by the storage servers themselves. For example, maybe your primary is able to talk to storage but not the network, or maybe it became unresponsive because of some performance issue / some background task that started but is still making progress slowly.
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