Re: [Xen-users] xen network and samba

["Niels Dettenbach (Syndicat IT&Internet)" <nd@xxxxxxxxxxxx>]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256



Simon Hobson <linux@xxxxxxxxxxxxxxxx> schrieb:

>Firstly, your DomU is limited to the speed of the host NICs - any
>reference to 100Mbps NICs is just a case what's emulated, not an
>indication that the speed is restricted to 100Mbps.
Does this mean in practice that any DomU to DomU virtual NIC troughput is 
limited to / by the hosts NIC hardware or did i understand something completely 
wrong here?


>Samba has many config options which can affect throughput. Some are
>set "conservatively safe but slow" which is one reason it sometime
>benchmarks badly against a Windows server. I'd suggest looking for
>resources related to performance tuning Samba.

>From my experiences with "current" sambas (up from 3.x) the performance 
>relevant adjustors just realize relatively "small" optimizations as samba acts 
>very flexible optimized in most scenarios i knew. You might drive with some 
>buffers in samba config (some of them "just" driving the NICs OS subsys, so it 
>may depend from your OS' config too).


>Also, DomU network access relies on a thread in Dom0. It's well known
>that this can be a significant performance bottleneck.

Sorry, but can you explain this a bit more? This is partly new to me and sounds 
interesting...


many thanks in advance,


Niels.
- --
Niels Dettenbach
Syndicat IT&Internet
http://www.syndicat.com
-----BEGIN PGP SIGNATURE-----
Version: APG v1.0.8

iIEEAREIAEEFAlAVcmg6HE5pZWxzIERldHRlbmJhY2ggKFN5bmRpY2F0IElUJklu
dGVybmV0KSA8bmRAc3luZGljYXQuY29tPgAKCRBU3ERlZRyiDYtmAJ4oSKaRkyYQ
ya8bNGvdvjGiO9+hmgCfe0WEUuZIyVpb5aST35Ia9Rcm74c=
=PY+b
-----END PGP SIGNATURE-----


_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxx
http://lists.xen.org/xen-users