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Re: [TEKNIK] fil system, robust overfor strømsvigt

Den Mon, 30 Apr 2007 11:55:17 +0200 skrev Kristian Nørgaard:
> Kan jeg vælge et alternativ til ext3, som er mere robust overfor
> deciderede powercuts?
> Altså et fil system som i højere grad kan restituere sig selv ovenpå et
> strømudfald, uden at man skal have root-access og køre disk reparationer
> med fsck?

Det kan ext3 jo. Og flere andre journaliserende filsystemer. Se http://
en.wikipedia.org/wiki/Comparison_of_file_systems for en liste. Nogle af 
filsystemerne journaliserer både metadata og data, mens andre ikke 
journaliserer helt så meget.

Ligegyldigt hvilket filsystem, vi taler om:
Mht. strømudfald er det uhyre vigtigt, at du har slået write-caching _fra_ 
på dine diske; ofte er det slået til (fordi det øger performance).

Hvis man vil have hardware write-caching, kræver det, at man har noget 
(typisk high-end) udstyr med batteri. Fx. kan man tillade sig at slå write-
caching til på en disk-controller, hvis controlleren har batteri-backup.

-- 
Regards,
Troels Arvin <sslug@sslug>
http://troels.arvin.dk/

 
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