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パフォーマンス

　SimpleDBのパフォーマンスは、MySQLのようなデータベースにどの程度匹敵するのだろうか？SimpleDBの大きな問題は、それぞれのリクエストがHTTPを用いて送信されるという点だ。これは、Amazonが強固なインフラを持っていたとしても、パフォーマンスの面では問題となりうる。

　この問題を解決する一つの方法は、ウェブアプリケーションとSimpleDBの間にキャッシュを設け、小さなリクエストを多数送るのではなくバッチでリクエストを発行することだろう。

　しかし、そもそもSimpleDBはリレーショナルデータベースに取って代わるために開発されたものではない。拡張性に富んだサービスで、一部のサービスやアプリケーションレイヤーを外部に移動させる機会を提供しているのである。ぜひ、Amazonのディスカッションフォーラムを読んで、SimpleDBを用いて実際にどんなことが行われているのかを調べて欲し

# umount /home

したあとに ec2-bundle-vol コマンドを実行してうまくいきました。/home の容量が少ない場合は成功するはずですが、この時の /home は結構容量があったので容量超過になったのですね。

fstab に書いていないのは、起動時に /dev/sdb1 がマウントされているとは限らないからです。要は ec2-bundle-vol する前は /home を umount しておけ、ということですね。

Das Asus PC900A gibts noch immer für 199€ bei Amazon! Ist wohl das kompakteste Netbook mit Atom N270 ...

Mehr Infos zum S10e gibts hier:

https://www.amazon.de/dp/B001MTEK9K?tag=nbamz-21&camp=2906&creative=19474&linkCode=as4&creativeASIN=B001MTEK9K&adid=043X9ES240EHQN13XSWQ&

 

http://www.markus-dollinger.de/2009/02/26/hands-on-lenovo-ideapad-s10-netbook/

Michael Geist reports on an important recent decision of the Canadian Patent Appeal Board (CPAB) regarding business method patents. These are patents that companies started collecting in the United States in the 1990s but which have not been embraced as enthusiastically in Canada. The most notorious business method is probably Amazon.com's patent on the method of processing a customer's online order in one click.

At first blush, the CPAB could have relied on the Manual of Patent Office Practice to support Amazon.com’s claim for a business method patent.  The 2005 Manual provides that "[business] methods are not automatically excluded from patentability, since there is no authority in the Patent Act or Rules or in the jurisprudence to sanction or preclude patentability."

Yet the panel delivered very strong language rejecting the mere possibility of business method patents under Canadian law.  The panel noted that "since patenting business methods would involve a radical departure from the traditional patent regime, and since the patentability of such methods is a highly contentious matter, clear and unequivocal legislation is required for business methods to be patentable."

In applying that analysis to the Amazon.com one-click patent, the panel concluded that "concepts or rules for the more efficient conduct of online ordering, are methods of doing business. Even if these concepts or rules are novel, ingenious and useful, they are still unpatentable because they are business methods."

 

Read the whole post here.

I came across this bit of wisdom this morning on Larry Cheng's blog and thought it really makes good sense both in business and in life - do you ever take the time to look at what's going right and double down on that?

"Today’s post is about one such piece of wisdom that I think is particularly relevant in these times.  This piece of wisdom came from Jeff Bezos, founder & CEO, Amazon.com during an MFG.com board meeting.  Jeff asked the question, “Is there anything big or small, that is working better than you expected?  Is there any where we could double down?”  Jeff’s point was that we spend a lot of time focusing on what’s not working in Board meetings (especially in times like these), and not enough time focusing on what is surpassing expectations and how we can “double down” on those areas.  Often times the key levers in businesses are found in little things that are really outperforming whether by intention or not (often not, actually).  Sometimes these are things that are either adjacent enough or small enough that they wouldn’t make a board presentation or be an obvious discussion point because they’re just seedlings that need to be watered.  I appreciate how Jeff wanted to bring these seedlings to the forefront to see if they deserved some real investment."

Read the rest here: http://larrycheng.com/2009/05/19/how-can-we-double-down/