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IIJ SEIL T1


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株式会社インターネットイニシアティブ
ネットワーク技術部研究開発課

山本 茂
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shigeru@iij.ad.jp

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SEILの概要

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	CPU: SH3
	OS: NetBSD 1.4 base + KAME
	Network Interface: 専用線(1.5Mまで), 10Base-T
	UI: Web base, telnet
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NetBSDで良かったこと

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	ソースコードがある
	multi architectureでかなり揉まれている
	user landのプログラムはUNIXだと思って開発できる
		かなりの部分をPCでデバッグできる
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NetBSDで困ったこと

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	コンパイラの問題
		最適化のレベルをあげると変なコードをはく
		最適化のレベルによってパフォーマンスにかなり差が出る
	デバッガの問題
		DDBがちゃんと動かない
	SH固有の問題
		alighment
		endian
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素のNetBSDとの違い = User Interface

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	ユーザには直接NetBSDであることは見えていない
		見えるのはboot messageぐらい
	ターゲット毎にUIを用意
		Web base: 新米管理者
		telnet(console): 熟練者
	shell(bsh, csh, etc.)は使わない
	つねにユーザの視点で考える
		場合によってはプログラマに死んでもらう :-)
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なぜshellを使わなかったのか?

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	設定を保持する方法の違い
	やっちゃいけないことはやらせない
	コマンドの直交性を良くする
	補完があるとうれしいところでは補完を可能にする
	途中でguide(help)が出る
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まとめ

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	やっぱりソースがあると便利
	コンパイラは重要
	勝手しったるBSDは楽

	良かったら買ってね ^^;
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