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Thu, 13 Sep 2007

London photos.

I've just added set of my London photos and several Cambridge photos to the gallery.

Please note, that I made all London photos without any automatic, since my camera is broken, so I needed to perform focus, aperture and exposure by hands, which sometimes resulted in bad quality. But actually I liked that process, since quite frequently it ended up with pictures I really wanted to see, but automatic was not able to detect my intentions. Unfortunately I did not get my tripod, otherwise I did not move from there that fast :)

Anyway, enjoy!

And here are my new books I brought from London:



"Engineering a compiler" by Keith D. Cooper and Linda Torczon.
"The road to reality. A Complete Guide to the Laws of the Universe" by Roger Penrose.
"Introduction to drawing" and "How to draw head and body of the human". Yes, I will try to learn, but I think I'm pretty hopeless :)

I think I would like to stay in London for longer (a year or so), but have no plans right now.
I want to greatly thank Tanya, Andrey, Ira and Meph for the excellent time I spent with them there. That was really great!
I hope I will quickly resolve my paid job issues and will visit you again :)

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Distributed storage testing.

Patch sent to linux-kernel@ and in archive is a bit broken, since it does not even compile (I messed with commits again), and I got no response about it.
Paul McKenney provided RCU review of the patchset and found it generally ok, although with couple questionable moments. RCU is not used in DST actually, so everything is good.

I will release new version soon (hopefully this week), which will include simple parts of the DST short-term todo list:

• move from ioctl/char device to netlink based setup
• store linear/mirror information at the end of the appropriate node's storage to allow extended autoconfiguration (if this will require a bit more work, then likely I will not put it to the next release)

• WEAVER codes implementation (I fully understand it now, but will extend original design to store checksums of the data to catch double switched bits, which can lead to data corruption for XOR based codes).
  First in userspace.
• start thinking about distributed filesystem (simple first steps) over distributed storage. I know, there is number of them, but I want my own, which will be tightly collaborated with underlying device for maximum performance and reliability.
  After Sun's announcement about buying ClusetFS (Lustre) I think about it more and more.

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