Emc Corporation

Emc IP Holding Company LLC

Eli Dorfman

Tal Ben-Moshe

David Krakov

Roman Vainbrand

Noa Cohen

Kirill Shoikhet

Niko Farhi

Anton Kucherov

Renen Hallak

Kobi Luz

Vladislav Weinbaum

Described herein are embodiments of a process for efficiently allocating RAID stripes across an array of disks (e.g., SSDs). In some embodiments, the process can be used to allocate RAID stripes across a 'heterogeneous' storage array (i.e., an array of different sized disks). Also described herein are embodiments of a storage system that utilize said processing.

Data protection in a heterogeneous random access storage array

A hiccup management scheme for use within a storage system can maintain low latency on client I/O when a storage device is temporarily unavailable. In some embodiments, a storage using uses double parity data protection can tolerate concurrent hiccups by up to two storage devices within a storage array.

Hiccup management in a storage array

Described herein are embodiments of a process that can be used to balance the allocation of primary memory between different types of information. In some embodiments, the memory allocation is balanced dynamically based on observed I/O patterns. Related system embodiments are also described.

Memory allocation balancing for storage systems

Described herein are several embodiments of systems and processes to decrease startup time for subsystems of a storage system. According to some embodiments, subsystem memory is allocated using memory-mapped files.

Fast startup for modular storage systems

In one aspect, a method includes receiving and recording journal data at a client on a first server, providing the data to a journal component, transferring the journal data from the journal component to a reserve memory in a memory of a second server using a remote direct memory access (RDMA), after failure of the client, retrieving the journal data from the reserve memory using the RDMA and replacing the journal data lost from the failure of the client with the journal data from the reserve memory.

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Raanana, Israel

Eli Dorfman