[chord] Re: CFS question

[Frank Dabek]

Yu-chung,

	Don't forget that CFS is a read-only file system: we don't expect
blocks to chane often (like many distributed file systems, CFS also
doesn't update the atime). When a file system is updated, any change to
a file will cause a logarithmic number of blocks to change (on a path
down the hash tree to the changed block) and those blocks will appear in
new locations.

--Frank

On Sat, 2003-05-31 at 15:18, Yuchung Cheng wrote:
> Frank,
> 
> It seems blocks need to move around after every update, since its hash
> has changed, but it might slow down file meta data block access (like
> the access time etc). how do you handle that in CFS? thanks.
> 
> Yu-chung