Meta 在新款服务器中使用定制桥接芯片以重复利用旧内存。

Meta 在新款服务器中使用定制桥接芯片以重复利用旧内存。
Meta reuses old RAM in new servers with custom bridge chip

原始链接: https://www.networkworld.com/article/4192827/meta-reuses-old-ram-in-new-servers-with-custom-bridge-chip.html

随着新内存成本的飙升，Meta 公司找到了一种在新型服务器中重复利用旧内存的经济方案。该公司表示，其数百万台服务器中约有 40% 的性能受到内存不足的限制，但同时却有大量来自退役服务器的旧 DIMM 内存条闲置，因为内存芯片的使用寿命约为整机寿命的两倍。为了利用这种不平衡，Meta 开发了一种名为 Vistara 的定制计算快速链接（CXL）芯片及其相关软件，将旧内存从服务器内存通道中解耦，从而使其能够与新服务器的原生内存一起使用。通过 CXL 接口使用旧内存并不会显著影响性能，而如果直接将旧 DIMM 插入新服务器，则会产生明显的性能损失。

With the cost of new RAM soaring, Meta has found a thrifty way to reuse older memory in newer servers.

The performance of about 40% of Meta’s millions of servers is limited by a lack of memory, the company said — but it has a surplus of older DIMMs from decommissioned servers, because RAM chips can last about twice as long as the rest of the machine.

To profit from this imbalance, it developed a custom Computer Express Link (CXL) chip it calls Vistara, and associated software, to decouple older memory from server memory channels, enabling its reuse in new machines alongside their native memory. Using the older RAM with the CXL interface doesn’t significantly affect performance — although it would have done if the older DIMMs were plugged straight into newer servers.

Meta 在新款服务器中使用定制桥接芯片以重复利用旧内存。 Meta reuses old RAM in new servers with custom bridge chip

Meta 在新款服务器中使用定制桥接芯片以重复利用旧内存。
Meta reuses old RAM in new servers with custom bridge chip