drwho wrote:
If so, GFS, is also suitable only for large, offline, batch computations ?
I wonder how Google is going to use GFS for writely or their online
spreadsheet or their BigTable (their gigantic relational DB).
Did I say anything about GFS? I don't think so. Also, I said,
"currently" and "primarily", not "forever" and "exclusively". I would
love for DFS to be more suitable for online, incremental stuff, but
we're a ways from that right now. As I said, we're pursuing
reliability, scalability and performance before features like append.
If you'd like to try to implement append w/o disrupting work on
reliability scalability and performance, we'd welcome your
contributions. The project direction is determined by contributors.
Note that BigTable is a complex layer on top of GFS that caches and
batches i/o. So, while GFS does implement some features that DFS still
does not (like appends), GFS is probably not used directly by, e.g.,
writely. Finally, BigTable is not relational.
Doug
Doug Cutting <[EMAIL PROTECTED]> wrote: <chopped>
DFS is currently primarily used to support large, offline, batch
computations. For example, a log of critical data with tight
transactional requirements is probably an inappropriate use of DFS at
this time. Again, this may change, but that's where we are now.
Doug
Thanks much.
-eric
