On 02/07/2013 08:24 AM, Zhi Yong Wu wrote:
HI,
If some guy is interested in this topic, i would like to talk about
VFS hot tracking.
The feature will add the support for tracking data temperature
information in VFS layer. Essentially, this means maintaining some key
hot data statistics (like number of reads/writes, last read/write
time, frequency of reads/writes), then distilling those numbers down
to a single "temperature" value that reflects what data is "hot", then
specific FS such as btrfs will take use of the temperature infomation
to move hot data to SSDs, or do the defragmetation.
In this talk, i would discuss its current implementation and how
its key points are resolved such as memory consumption, how its hot
data is updated periodically, etc.
If you have any suggestions, pleas let me know, thanks.
That sounds a good fit for the LSF discussion. I am happy to hear the
update of this feature and where it will go from here. Especially
discussions of APIs that expose the data hotness and how that
information could be used by filesystems and storages.
Mingming
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