Re: [9fans] Clearing venti arena during install

["Lluís Batlle i Rossell" <viriketo@gmail.com>]

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bakul+plan9@bitblocks.com wrote:
> If fossil+venti is chosen during installation, the entire
> venti arena partition is cleared.  Is there a way to avoid
> clearing all of the arena space?  Since in a sense it is an
> append only log, and the purpose for clearing it is,
> presumably, to allow recreating the index, may be a shortcut
> exists?  Doing so will save a lot of time and space
> particularly on a qemu VM.  In qemu one can use a sparse file
> or a qcow format file which allocates space only for data
> actually written.  Writing even zeroes can eat up space.
As I've tested, if you avoid using "qcow" and otherwise use a "raw" qemu
image, the venti formatting is normally quick in my Linux system. Using
'qcow' terribly slows down that format process.

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