Messages in this thread | | | Date | Tue, 18 May 1999 21:40:53 -0400 (EDT) | From | "Theodore Y. Ts'o" <> | Subject | Re: ext2 question |
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Date: Wed, 19 May 1999 00:03:39 +0200 (CEST) From: Andrea Arcangeli <andrea@suse.de>
But the log-wrap is not the only problem, the other performance problem of a real logfs is that we are not going to always read _data_ (not only metadata) in the same order we write things to disk... And we are going to read _far_ more frequently than writes...
... and one traditional way of dealing with this problem is to assume that you have a *large* amount of memory, so that most of what you need to read can be buffered, so that the fact that things are often laid out in a pessimal order for reading doesn't matter.....
I wouldn't call this a particularly realistic assumption, but then again memory keeps getting cheaper and cheaper. :-)
- Ted
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