Synchronizing RAID configuration changes across storage processors

Synchronizing RAID configuration changes across storage processors

A technique for maintaining RAID (redundant array of independent disks) configuration metadata across multiple SPs (storage processors) includes receiving a change request by a controller within a first SP, writing, by the first SP, a RAID configuration change described by the change request to a pe...

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Hauptverfasser: Heng, Socheavy, Foley, Robert P, Puhov, Peter
Format: Patent
Sprache:eng
Schlagworte:
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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creator Heng, Socheavy
Foley, Robert P
Puhov, Peter
description A technique for maintaining RAID (redundant array of independent disks) configuration metadata across multiple SPs (storage processors) includes receiving a change request by a controller within a first SP, writing, by the first SP, a RAID configuration change described by the change request to a persistent intent log, and informing a second SP that the intent log has been written. The second SP, upon being informed of the write to the intent log, reads the RAID configuration change from the intent log and writes the RAID configuration change to a persistent configuration database. In this manner, the first SP and the second SP both receive the RAID configuration change and thus are both equipped to service reads and writes directed to a affected RAID storage.
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subjects CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
title Synchronizing RAID configuration changes across storage processors
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