Re: [PATCH] Sloppy TCP, SH rebalancing, SHP scheduling

To: Julian Anastasov <ja@xxxxxx>
Subject: Re: [PATCH] Sloppy TCP, SH rebalancing, SHP scheduling
Cc: Aleksey Chudov <aleksey.chudov@xxxxxxxxx>, lvs-devel@xxxxxxxxxxxxxxx
From: Alexander Frolkin <avf@xxxxxxxxxxxxxx>
Date: Fri, 7 Jun 2013 08:53:04 +0100

>       May be the patch for Sloppy TCP mode should be
> extended to assume that old state is sSR if packet that
> creates the connection has no RST flag. This will allow
> connection to enter sES state if need, it will not stay
> always in sCL state.

I'll have to read the code a bit more to completely understand that, but
it seems to make sense!

> As for the initial check, it should be:
>       if ((sysctl_sloppy_tcp(net_ipvs(net)) || th->syn) &&
> +         !th->rst &&

Make sense.

>       Also, one can enable Sloppy TCP mode for short
> time during switchover, it should be safer to run with
> disabled mode.

The problem is that switchover won't necessarily be controlled if a
server fails.


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