2019 GDD breaking world‘s record of π

 

Day 2

一、breaking pi‘s world record with google cloud 

 

【concept】

memory wall：

Originally theorized in 1994 by Wulf and McKee, this concept revolves around the idea that computer processing units (CPUs) are advancing at a fast enough pace that will leave memory (RAM) stagnant. This isn’t going to happen immediately, but assuming current trends in CPU and RAM remain the same, we could hit a memory wall sometime in the near future.

Once we reach this so-called memory wall, program/app execution time will depend almost entirely on the speed at which RAM can send data to the CPU. 

 n1-megamen-96:

計算節點 96 vCPU, 1.4TB RAM ,單臺ECS的配置。那麼是否Google cloud的ECS已經突破了物理機限制，實現跨物理機的VM？

查詢Google 官網有以下VM機型介紹

https://cloud.google.com/compute/docs/machine-types?hl=zh-cn

機器名稱	說明	vCPU 數量1	內存 (GB)	永久性磁盤 (PD) 數上限2	總 PD 容量大小上限 (TB)	本地 SSD
n1-megamem-96	具備 96 個 vCPU 和 1.4 TB 內存的內存優化機器類型。	96	1433.6	128	64	是

機器名稱	說明	vCPU 數量1	內存 (GB)	永久性磁盤 (PD) 數上限2	總 PD 容量大小上限 (TB)
n1-standard-16	具備 16 個 vCPU 和 60 GB 內存的標準機器類型。	16	60	128	64