US 2020/0264979 A1 · In-Memory Distributed Cache

Abstract

A method for an in-memory distributed cache includes receiving a write request from a client device to write a block of client data in random access memory (RAM) of a memory host and determining whether to allow the write request by determining whether the client device has permission to write the block of client data at the memory host, determining whether the block of client data is currently saved at the memory host, and determining whether a free block of RAM is available. When the client device has permission to write the block of client data at the memory host, the block of client data is not currently saved at the memory host, and a free block of RAM is available, the write request is allowed and the client is allowed to write the block of client data to the free block of RAM.

Claims20

Dependent claims

A method comprising:

determining, at a memory host, an amount of spare dynamic random access memory (DRAM) available on the memory host;
determining, at the memory host, whether the amount of spare DRAM satisfies a threshold amount comprising at least one free block of DRAM, the threshold amount corresponding to a predetermined amount of headroom within the memory host of the distributed storage system;
when the amount of spare DRAM satisfies the threshold amount, allocating, at the memory host, the at least one free block of DRAM to a free block queue;
and
when the amount of spare DRAM fails to satisfy the threshold amount, deleting, at the memory host, a block of client data from the memory host based on a priority of the client data, the priority indicating a replication level of the client data throughout the distributed storage system.

2 more elements

A memory host comprising:

data processing hardware;
and
memory hardware in communication with the data processing hardware, the memory hardware storing instructions that when executed on the data processing hardware cause the data processing hardware to perform operations comprising:
determining an amount of spare dynamic random access memory (DRAM) available on the memory host;
determining whether the amount of spare DRAM satisfies a threshold amount comprising at least one free block of DRAM, the threshold amount corresponding to a predetermined amount of headroom within the memory host of the distributed storage system;
when the amount of spare DRAM satisfies the threshold amount, allocating the at least one free block of DRAM to a free block queue;
and
when the amount of spare DRAM fails to satisfy the threshold amount, deleting a block of client data from the memory host based on a priority of the client data, the priority indicating a replication level of the client data throughout the distributed storage system.

5 more elements

Dependencies are inferred from the claim text.

In-Memory Distributed Cache

Life of this patent

In-Memory Distributed Cache

Life of this patent

Abstract

Claims20