Re: How to flush the writing cache before a test with read
|[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]|
Dan Le wrote:
Fio does an fsync and an FADVISE_DONT_NEED call after file creation phase which causes the cache to be dropped. I have never had a problem with files still being in cache when a read test starts. The only one to watch out for is if you repeat the test, the files may be in cache from a previous read, as the default behavior is to not delete on completion and to not re-create if they already exist.Greetings, FIO needs to write data files in order to read them. Without disabling the write-cache of the disk, I was wondering if there's a way to flush these data cache to disk right before FIO starts to read these files.
I don't want to run every second "sync && echo 3 > /proc/sys/vm/drop_caches" at the same time with FIO because of its incurred overhead. Please help. Thank you, Dan -- To unsubscribe from this list: send the line "unsubscribe fio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
-- To unsubscribe from this list: send the line "unsubscribe fio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html