[Samba] Re: CTDB + Samba: Tune Read Performance

[tim clusters]

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
value.

Cheers,
-Tim