13 reputation
5
bio website liuyonggang.blog.com
location Gainesville, FL
age 29
visits member for 2 years, 9 months
seen Dec 3 '11 at 5:38

Research assistant at University of Florida. Involved in the research of I/O scheduling in parallel file systems, storage system virtualization and system simulation.


Jul
8
awarded  Popular Question
Nov
8
comment Large delay starting “dd” write in background in bash even when using nohup
Thanks for the reply. But that's not where the problem comes from, either. I have commented both the dropcaches and sync, and made sure the machine has finished flushing or freeing the pages before starting to write, but the big delays still exist.
Nov
8
comment Large delay starting “dd” write in background in bash even when using nohup
Yes I have the time binary: root@yonggang-laptop:/# which time /usr/bin/time
Nov
8
asked Large delay starting “dd” write in background in bash even when using nohup
Nov
8
awarded  Analytical
Nov
8
awarded  Student
Nov
7
comment Can't find the pdflush thread?
It makes sense. Thank you for your reply.
Nov
7
comment Can't find the pdflush thread?
Thank you very much for your answer. 8:0 corresponds to /sys/class/block/sda/dev on my computer, so this flush process should be working for the device /dev/sda. I get one more question: since the write back process is changed, does dirty_ratio and dirty_background_ratio still work in the same way as before?
Nov
7
awarded  Scholar
Nov
7
accepted Can't find the pdflush thread?
Nov
7
awarded  Autobiographer
Nov
7
asked Can't find the pdflush thread?