Re: metadata layout problems and some history

  On 08/09/2010 08:11 PM, seth vidal wrote:
> On Sat, 2010-08-07 at 17:37 +0200, Michael Schroeder wrote:
>> So it takes about a second to convert the 2.8 Mbytes xml file to
>> solv. I guess creating the sqlite database is a bit slower, so you
>> chose to do it on the server and not on the client.
> As the size of this file increases how much time is eaten up? You showed
> a f12 updates repo, it seems.
Our updates repo also increases its size. I haven't noticed that the 
performance goes in any annoying way. At least you can't notice it 
because download is what takes most time.

> Fedora 13 GA for x86_64 - the compressed primary.xml.gz is 7.9M.
>
> So does that mean the solv-creation is going to take ~3s?
>
> I don't see the number of pkgs decreasing at any point in time and since
> we were pushing fedora onto some REALLY underpowered boxes we found the
> xml->sqlite conversion can SUCK on some machines (OLPC XO-1's for
> example were horrendous)
As Michael said, for xml->solv you can't almost notice it. I have used 
it on netbooks and the performance is still very good.

> Do you end up storing the xml AND the solv files in the cache dir? I ask
> b/c this was another reason for doing server-side-generated sqlite b/c
> we were keeping both in the cache and, again, on the XO-1 and other
> quasi-small-disk systems (and most importantly SSDs) we were trying to
> keep the disk writes and disk use as low as possible.
>

Yes, we have /var/cache/zypp/raw and /var/cache/zypp/solv

Duncan