On Wed, Jan 27, 2010 at 11:46 AM, Roger Heflin <[email protected]>wrote:
>
> speeds, but is all how the mvpmc interfaced with the myth protocol.
>>
>> Rick
>>
>> That tells me that the problem has nothing to do with CPU or disk access
>
> That would be network then.
>
>
I don't see how it's network. I'm moving effectively the same amount of data
across the network using either method (myth protocol or CIFS directly),
right? That it works with CIFS means that the network is handling the load
just fine, right?
> THe mvpmc does have issues if the block size is too large, it loses packets
> because the network chip is rather cheap.
>
> On nfs setting the blocksize above 4096 caused issues, I believe there is a
> similar parameter for the myth protocol setup, but I have never set it to
> don't know where it is.
>
Do you mean blocksize of the file system? Because the size of the blocks on
the file system shouldn't affect network traffic really. (well I mean in the
grand scheme datacenters it does, but it shouldn't in this context.)
The myth wiki talks about adjusting block size for XFS (
http://www.mythtv.org/wiki/Optimizing_Performance), but again I'm not having
problems moving the data off the file system.
The myth protocol wike (http://www.mythtv.org/wiki/Myth_Protocol) doesn't
talk about changing the payload/packet size.
? I don't see how using CIFS successfully doesn't remove the question of
the server's performance, and bring the entire issue back to the mvpmc code
that handles receipt of data from mythtv protocol. Given enough time (which
can be not much) it bombs out using the mythtv protocol.
Rick
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