Re: soft-update/async write file systems

Stephen C. Tweedie (
Thu, 26 Feb 1998 23:33:51 GMT


On Tue, 24 Feb 1998 13:45:39 -0800 (PST), Dan Hollis
<> said:

> On Mon, 23 Feb 1998, Theodore Y. Ts'o wrote:
>> The only solution which I've thought of which avoids this problem is
>> having a pseudo device, which orders writes by moving copying data
>> between the pseudo-device (on which the filesystem is actually mouned),
>> and the actual disk device, with the writes happening under the control
>> of the pseudo-device. This chews up extra memory for the extra copies
>> of the block buffers for the pseudo-device though. No hack is perfect.

> I suggested something like this a few months back, and was dismissed out
> of hand. Does this mean my idea wasn't completely insane after all?

Actually, I thought it sounded quite neat first time around. :)


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