ISILON X200 PDF

Enumeration Enumeration involves notifying the cluster administrator of any file system damage uncovered in the detection phase. Isolation Isolation is the act of cauterizing the file system, ensuring that any damage identified during the detection phase does not spread beyond the file s that are already affected. This typically involves removing all references to the file s from the file system. Repair Repairing any damage discovered and removing the damaged file s from OneFS.

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Enumeration Enumeration involves notifying the cluster administrator of any file system damage uncovered in the detection phase. Isolation Isolation is the act of cauterizing the file system, ensuring that any damage identified during the detection phase does not spread beyond the file s that are already affected.

This typically involves removing all references to the file s from the file system. Repair Repairing any damage discovered and removing the damaged file s from OneFS. Focused on the detection phase, the primary OneFS tool for uncovering system integrity issues is IntegrityScan.

This job is run on across the cluster to discover instances of damaged files, and provide an estimate of the spread of the damage. It does this by systematically reading every block and verifying its associated checksum. IntegrityScan is typically run manually if the integrity of the file system is ever in doubt.

Although IntegrityScan itself may take several hours or days to complete, the file system is online and completely available during this time.

Additionally, like all phases of the OneFS job engine, IntegrityScan can be re-prioritized, paused or stopped, depending on its impact to cluster operations. OneFS can only accommodate a single marking job at any point in time. However, since the file system is fully journalled, IntegrityScan is only needed in exceptional situations.

There are two principle use cases for IntegrityScan: Identifying and repairing corruption on a production cluster. Certain forms of corruption may be suggestive of a bug, in which case IntegrityScan can be used to determine the scope of the corruption and the likelihood of spreading. It can also fix some forms of corruption. Repairing a file system after a lost journal. This use case is much like traditional fsck. This scenario should be treated with care as it is not guaranteed that IntegrityScan fixes everything.

This is a use case that will require additional product changes to make feasible. IntegrityScan can be initiated manually, on demand.

The following CLI syntax will kick off a manual job run:.

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EMC Isilon X200 - NAS server - 24 TB Series Specs

The products are designed for environments with mid-tier network storage needs. The products support a hybrid flash setup, which combines the performance of flash-based solid-state drives SSDs with the large capacity and low cost of mechanical hard disk drives HDDs. All three products can be scaled into clusters of up to nodes. It runs dual eight-core Intel Xeon processors.

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