[9fans] ndb/cs seems slow (3 secs)

[9fans] ndb/cs seems slow (3 secs)

[Steve Simon]

This is probably due to somthing silly I have done, I am trying to debug
why my machine is being slow to dial network connections.

I had just got used to it until I have reason to use sshnet to a linux box
which seemed much faster.

I have traced the problem to ndb/cs, which seems to be taking
about 3 secs to resolve a name:

	larch% echo tcp!www.bbc.co.uk!http | time ndb/csquery
	> /net/tcp/clone 212.58.244.67!80
	/net/tcp/clone 212.58.244.66!80
	> 0.00u 0.00s 3.07r 	 ndb/csquery

However, if given an IP address it is quick:

	larch% echo tcp!212.58.244.67!http | time ndb/csquery
	> /net/tcp/clone 212.58.244.67!80
	> 0.00u 0.00s 0.01r 	 ndb/csquery

I have checked dns which resolves names quickly:

	larch% echo www.bbc.co.uk | time ndb/dnsquery
	> www.bbc.net.uk ip	212.58.244.66
	www.bbc.net.uk ip	212.58.244.67
	> 0.00u 0.01s 0.20r 	 ndb/dnsquery

I remember that there where some changes ages ago to support /net.alt
but I don't have one. I do have a /net.home, my own creation, but cs
doesn't know about that (unless it is cleverer than I thought).

Anyone have any ideas where to look next?

-Steve

Re: [9fans] ndb/cs seems slow (3 secs)

[erik quanstrom]

On Fri Mar  7 07:58:51 EST 2014, steve@quintile.net wrote:
> This is probably due to somthing silly I have done, I am trying to debug
> why my machine is being slow to dial network connections.
>
> I had just got used to it until I have reason to use sshnet to a linux box
> which seemed much faster.
>
> I have traced the problem to ndb/cs, which seems to be taking
> about 3 secs to resolve a name:

could it be choking on ip6?

- erik

Re: [9fans] ndb/cs seems slow (3 secs)

[erik quanstrom]

>> I have traced the problem to ndb/cs, which seems to be taking
>> about 3 secs to resolve a name:
>
>could it be choking on ip6?

that is, does ndb/cs -4 give the same results?

- erik

Re: [9fans] ndb/cs seems slow (3 secs)

[Steve Simon]

Excellent! Good spot.

For the archives, ipv6 can also be toggled on/off with

	echo ipv6 > /net/cs

Thanks

-Steve

Re: [9fans] ndb/cs seems slow (3 secs)

[erik quanstrom]

On Fri Mar  7 08:29:46 EST 2014, steve@quintile.net wrote:
> Excellent! Good spot.
>
> For the archives, ipv6 can also be toggled on/off with
>
> 	echo ipv6 > /net/cs

off by default might be the right thing on more systems than not.

- erik