とりあえずメモ
去年、Infiniband、RDMA あたりを調べたとに見つけた資料のいい絵。ブログにメモしとこ。 pic.twitter.com/VF6LIaWkj6
— yohei.a-z (@yoheia) 2017年3月26日
— yohei.a-z (@yoheia) 2017年3月26日
参考
Exafusion Direct-to-Wire Protocol
Exafusion Direct-to-Wire protocol allows database processes to read and send Oracle Real Applications Cluster (Oracle RAC) messages directly over the Infiniband network bypassing the overhead of entering the OS kernel, and running the normal networking software stack. This improves the response time and scalability of the Oracle RAC environment on Oracle Exadata Database Machine. Exafusion is especially useful for OLTP applications because per message overhead is particularly apparent in small OLTP messages.
Minimum software: Oracle Exadata Storage Server Software release 12.1.2.1.0 contains the OS, firmware, and driver support for Exafusion and Oracle Database software release 12.1.0.2.0 BP1.
What's New in Oracle Exadata Database Machine
the user-space HCA library accesses the hardware registers and the send and receive queues directly through memory-mapped I/O space and kernel memory.
Access to InfiniBand* from Linux* | Intel® Software
