[Samba] Re: CTDB + Samba: Tune Read Performance
John H Terpstra
jht at samba.org
Fri Jan 30 05:45:06 GMT 2009
On Thursday 29 January 2009 21:40:55 tim clusters wrote:
> On Tue, Jan 27, 2009 at 6:30 PM, tim clusters <tim.clusters at gmail.com>wrote:
> > Hi,
> > I have a two server setup that acts as SMB as well as NFS servers in
> > active/active configuration managed by CTDB(http://ctdb.samba.org/).
> > The write performance is around 100MB/s per client however the read
> > performance is only 0.6MB/s (using Iozone benchmark). I use Windows 2003
> > Server as CIFS client. Sometimes the read performance is good only from
> > one of the CTDB managed Samba servers but not consistent when you restart
> > CTDB + Samba.
> The issue is resolved and was network related. Tcpdump revealed lots of
> retransmission from the server to client owing to improper TcpWindowSize
Thanks for reporting that back to the list. This is useful information for
others. Would it be possible to perhaps provide a little more detail?
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