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To: cs551@merlot.usc.edu
Subject: Re: Project 2
Date: Sun, 23 Nov 2008 19:57:56 -0800
From: Bill Cheng <william@bourbon.usc.edu>

Someone wrote:

  > So is it fine if I create a nonce index as well?

Sure!  You can have any additional index structures and
files as you see fit.

But since you already have a SHA1 index and a FileName
index and either SHA1 or FileName will be available,
there is really no need to create a Nonce index.  It's
just one extra data structure to keep track of.
--
Bill Cheng // bill.cheng@usc.edu <URL:http://merlot.usc.edu/william/usc/>






  On Sun, Nov 23, 2008 at 7:50 PM, Bill Cheng <william@bourbon.usc.edu> wrote:
  > Someone wrote:
  >
  >  > Continuing from the message below:
  >  > Wouldn't nonce be enough to identify a file uniquely?
  >
  > Yes, unless there are some strange bugs that caused
  > non-unique nonces to be greated.  Anyway, you should
  > check FileName, SHA1, and Nonce.
  >
  > Since there is no index for nonces, you should use
  > the SHA1 index or the FileName index to search.
  > --
  > Bill Cheng // bill.cheng@usc.edu <URL:http://merlot.usc.edu/william/usc/>
  >
  >
  >
  >  > On Sun, Nov 23, 2008 at 3:47 PM, Bill Cheng <william@bourbon.usc.edu>
  > wrote:
  >  > > Someone wrote:
  >  > >
  >  > >  > The format for delete command is 'delete FileName=foo SHA1=6b6c...
  >  > >  > Nonce=fe18..' . Are all the 3 arguments mandatory and shud be in
  > this
  >  > > fixed
  >  > >  > order ?
  >  > >
  >  > > All are mandatory.  Given our rules of not keeping files
  >  > > with duplicate FileName, SHA1, *and* Nonce, this should
  >  > > match at most one file in your mini-filesystem.
  >  > > --
  >  > > Bill Cheng // bill.cheng@usc.edu <URL:
  > http://merlot.usc.edu/william/usc/>