[Lustre-devel] proposal on implementing a new readahead in clio

Alex Zhuravlev Alex.Zhuravlev at Sun.COM
Tue Jan 26 02:02:32 PST 2010


I think we could help a lot if you restructure the proposal a bit:

first of all, describe the algorithm w/o implementation details,
probably using notion of event: read event extending window, io to
get data ahead, read-ahead io completion, hit/miss, etc.

then map these events to specific code paths? explain what kind of
information/mechanism layers miss to implement the algorithm?


On 1/20/10 3:37 PM, jay wrote:
> Hello,
> We have discussed the implementation of new readahead in CLIO. Here I
> just send the design document out to ask for comments.
> We have already had several inputs from Z(aka bzzz) and other engineers.
> I'm not going to copy those ideas here directly, because I'm afraid to
> distort something, so please reply this email to show your ideas -
> thanks in advance.
> Jay
> _______________________________________________
> Lustre-devel mailing list
> Lustre-devel at lists.lustre.org
> http://lists.lustre.org/mailman/listinfo/lustre-devel

More information about the lustre-devel mailing list