debugocfs -f /filepath_without_mountpath /dev/sdX
will list the fileentry.
1. granularity should be -1 (and local_ext=true).
2. only extents[0] should have values.
extent[0].file_off = 0
extent[0].num_bytes = 106496
extent[0].disk_off = 181178368
All log files need to be contiguous. You can do that manually by
creating a file using dd and then reusing the file as a log file.
ocfsextfinder shows the largest free contiguous blocks available.
On Wed, 2004-06-16 at 06:58, David McWhinnie wrote:> Sunil Wrote:
> "So, if anyone were to ask, does ocfs support asyncio,
> the easier answer is no. However, if someone
> persisted, the answer is, only if your logfiles are
> contiguous. And as that gets into reading debugocfs
> outputs, the user has to make the determination, if
> the effort is worth the gain in performance."
>
> I guess I am persisting. We are seeing some
> performace issues and would like to turn on Async I/O.
> Any advice for turning on and reading the debugocfs
> outputs?
>
>
>
>
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