SANsymphony-V relies on Windows Communication Foundation (WCF) to keep a secure connection between the two DataCore servers. Unfortunately WCF doesn’t tolerate time changes greater than 30 seconds. So if we look again at the log message posted by the windows time service.
The system time has changed to 2013-03-24T00:01:49.899001000Z from 2013-03-24T00:01:13.333675100Z
So the system time has been changed by more than 30 seconds. This will cause the connection between SANsymphony-V nodes to break. This will force the DataCore server to perform some actions like “reviewing” its inventory to know exactly know what’s going on. And this is what causes these alarming but innocuous log messages
as you can see we got 4 paths between our storage servers even we got only two physical connections. This is because a storage node uses both (or more) ports to login on his partner node and vice versa what results in 4 logical paths. Only then you will be able to unplug a cable with no impact on your virtual disks because then the active path can failover to his standby path
DataCore Storage Hypervisor SANsymphony-V 9.0 erweitert um Funktionalitäten die den Storage-Hypervisor durch noch höhere Skalierbarkeit Flexibilität und Automation für den Einsatz in Cloud Umgebungen optimieren – eignet sich besonders für große Rechenzentren Private Cloud Infrastrukturen und Cloud Service Provider
If you are a VMware vExpert, VMware Certified Professional or VMware Certified Instructor, DataCore Softwareis offering a FREE 1 year NFR license. A DataCore SANsymphony-V Not-for-resale (NFR) licensecan only be used in a non-production environment, for evaluation, demonstration and training purposes only
TwinStrata CloudArray is an enterprise-class cloud storage gateway that integrates seamlessly with DataCore SANSymphony-V Storage Hypervisor software to enable secure and economical expansion of your storage capacity without limits into the cloud. Instantly and seamlessly add pay-as-you go tiers of storage to offload and augment your existing storage environment
DataCore SANsyphony-V automated storage tiering – optimizes across different types of storage by dynamically choosing between fast / expensive assets (e.g., SSDs) and lower cost / higher capacity storage resources
DataCore SANsymphony-V Tiered storage reduces costs and optimizes performance. You can reserve your most pricey disks for the most critical and demanding applications while you assign lower cost drives to lower priority workloads. Often customers choose Solid State Drives (SSD) for an exclusive set of workloads whereas they set aside relatively inexpensive large capacity SATA drives for online backups. The same application may take advantage of different tiers. For example a database applications may employ disks from the high performance high availability tier for critical log files but use low-end high-density drives for its scratch files
DataCore SANsymphony-V software solves difficult storage-related challenges introduced by server and desktop virtualization cloud computing and more general expansion business continuity and disaster recovery initiatives. It forms an active transparent virtualization layer across disk storage devices to maximize the availability performance and utilization of data centers large and small
SANsymphony-V relies on Windows Communication Foundation (WCF) to keep a secure connection between the two DataCore servers. Unfortunately WCF doesn’t tolerate time changes greater than 30 seconds. So if we look again at the log message posted by the windows time service.
