Re: [Gluster-devel] webservers vs. glusterfs vs. namespace

[Sascha Ottolski]

Am Freitag 18 Januar 2008 17:49:15 schrieben Sie:
> Sascha,
>  the reason why 1.3.0pre4 might be faster would not be because of the
> missing namespace, but most likely because of missing self-heal. can
> you try with 'option self-heal off' in the unify section?

i will try this, but this would certainly be not be possible for 
production. and, there's nothing to heal here, the clients are only 
reading, and the namespace is already up to date.

just did a quick test, seems not to indicate that self-heal off does a 
difference :-(


> are the test results same for multiple runs too?

the numbers drop a bit of course, but the relations stay similar. 
strange, isn't it?


Thanks, Sascha


>
> avati
>
> 2008/1/18, Sascha Ottolski <address@hidden>:
> > Hi Folks,
> >
> > I'm wondering if anyone might have some general advices if I miss
> > something important in my test setup. I'm trying to figure out how
> > to tweak the configs to achieve the best performance, but get
> > result that feel strange to me. I will post some numbers at a later
> > point, but up to now what I discovered is:
> >
> > - glusterfs without a namespace (1.3.0pre4) seems to be significant
> > faster than with namespace (tla patch-628)
> >
> > that seems to logical, at least I would expect some overhead for
> > the namespace.
> >
> > what i absolutely not understand is, how different the webservers
> > perform. i tested with
> >
> >     siege -f /tmp/siege-urls.txt.new -c100 -i -r50 -b
> >
> > with up to 3 sessions in parellel, each firing it's requests to a
> > seperate webserver (on seperate machines, of course).
> >
> > up to now my ranking by means of requests/per second is something
> > like
> >
> > 630 | apache
> > 430 | apache2 (worker)
> > 350 | nginx
> > 250 | lighttpd
> >
> > (with 1.3.0pre4 and no namespace, the best I've seen was apache2
> > with about 900, apache still 750). I must admit that up to now I
> > did not compare it to local filesystem, but from my past
> > experiences with webservers I would expect nginx and lighttpd way
> > ahead of the apaches...
> >
> > Also, I exprimented a bit with different settings for io-threads on
> > the server (1, 2, 4, 8, and cache-size 64 or 128MB), but that
> > didn't seem to make much of a difference. Same with read-ahead
> > (which seems logical, as I test with relatively small images).
> >
> > So far I did not try the booster. I use fuse-2.7.0-glfs7. I also
> > did not try the latest tla nor fuse-2.7.2-glfs8.
> >
> >
> > Thanks a lot for any pointer,
> >
> > Sascha
> >
> >
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