User: Password:
|
|
Subscribe / Log in / New account

The end of block barriers

The end of block barriers

Posted Aug 19, 2010 15:25 UTC (Thu) by butlerm (guest, #13312)
In reply to: The end of block barriers by corbet
Parent article: The end of block barriers

The problem is that in general an fsync requires a journal commit. If you have to flush the entire write cache throughput for non-fsync-serialized threads might be fine, but the performance of threads that call fsync will seriously suffer due to the delay.

Flushing the write cache of the device a lot also moves the request ordering / merging efficiency problem down a level. If the device must flush the entire write cache on a regular basis, it has much reduced opportunity to order write operations as optimal for that device.


(Log in to post comments)


Copyright © 2017, Eklektix, Inc.
Comments and public postings are copyrighted by their creators.
Linux is a registered trademark of Linus Torvalds