Principles for OceanStor 9000 restriping to take effect

35

Principles for OceanStor 9000 restriping to take effect:
- Before restriping, OceanStor 9000 determines whether the used space of the node pool in the target tier reaches the read-only watermark. Restriping is implemented only when the used space is lower than the read-only watermark. If the used spaces of all node pools in the target tier are higher than the read-only watermark, restriping is stopped.
- A restriping operation must not interrupt user access. If a user modifies data that is being restriped, the restriping operation stops and rolls back. The data that has been restriped to the new node pool is deleted and restriping will be performed later.
- You must start another restriping operation after the current one is complete. For example, during the process of a file being restriped from tier 1 to tier 2, if the file poll policy changes and the file needs to be restriped to tier3, you must wait until the restriping to tier 2 is complete and then start the restriping to tier 3.

Other related questions:
Introduction to restriping in OceanStor 9000
Restriping means migrating data that has been stored to another tier or node pool.

Functions of restriping in OceanStor 9000
Through restriping, data is stored based on file pool policies.

Quota effective rule of the OceanStor 9000 InfoAllocator feature
After you set quotas for a user and an owning user group, or a directory and a child directory, the quotas are valid for both of them, and the quota that reaches the threshold first takes effect.

Division principles of OceanStor 9000's tier
Division principles of OceanStor 9000's tiers: - If you do not add new tier CONFIGUREs, all node pools are of the default tier. - A hotspot data storage tier is created for the data that is frequently accessed. All nodes that have high data processing capabilities and fast response speeds are located in this tier for accelerated response speed and improved storage performance. - A common data storage tier is created for the data that is less-frequently accessed. All nodes that have moderate response speeds but can provide large storage space are located in this tier for reduced deployment and maintenance costs. - It is recommended that node pools in the same tier be of the same type. However, you can adjust the type of node pools in a tier as required.

Division principles of OceanStor 9000's DiskPools
Solid state disks (SSDs) in the second to Nth (N indicates the number of configured SSDs) slots compose a DiskPool that stores small files for enabling SSD acceleration CONFIGURE. Hard disk drives (HDDs) compose another DiskPool.

If you have more questions, you can seek help from following ways:
To iKnow To Live Chat
Scroll to top