<html> <head> <meta content="text/html; charset=windows-1252" http-equiv="Content-Type"> </head> <body bgcolor="#FFFFFF" text="#000000"> Yes. That's another consensus of the block-level log-structured caching works that I've introduced in the previous post. For example, NetApp's Mercury (2012) has the following sentence indicating that it also copy data to in-memory buffer and write it (called log chunk in the paper but I call dm-writeboost's equivalent "RAM buffer") to cache device when it gets full. ``` <meta charset="utf-8"> Once a successful acknowledgment is received, an I/O command’s data is copied to an in-memory buffer, called a log chunk, and the command is completed to the upper layer. The log chunk is written to the cache device when full. ``` - Akira <div class="moz-cite-prefix">On 2015/02/21 0:06, Joe Thornber wrote: </div> <blockquote cite="mid:20150220150614.GA4740@debian" type="cite"> <pre wrap="">On Fri, Feb 20, 2015 at 05:44:01PM +0900, Akira Hayakawa wrote: </pre> <blockquote type="cite"> <pre wrap="">I will wait for ack from dm maintainers. </pre> </blockquote> <pre wrap=""> Are you still copying the contents of every bio to your own memory buffer before writing it to disk? - Joe </pre> </blockquote> </body> </html>