On 6/18/07, Martijn van Beek <[EMAIL PROTECTED]> wrote:
I'm not streaming live data but stored flv movies. And the problem then appears when a lot of people access the file at the same time but all at a different position (in time).
That IS a problem which might be solved by a cache system. FMS uses cache on Edge servers. Martijn, could you please give more data about this issue? How many concurrent accesses will become a bottleneck for the I/O reading of FLV? On 6/17/07, Steven Gong <[EMAIL PROTECTED]> wrote:
> Orion, > > On 6/17/07, Orion Letizi < [EMAIL PROTECTED]> wrote: > > > > > > While it may be impractical to cluster the actual AV data in the > > stream, > > perhaps the current state (metadata) of the stream could be clustered > > so > > that, as long as the AV data was available on disk at each server, any > > > > server could pick up the stream and start serving it based on the > > metadata > > about the stream (e.g., offset into the data file, current position of > > buffers, stuff like that). > > > Yep, that's true if the VOD streaming is pulled by the client. But as we > also need to track the client buffer, we are using a scheduled task to push > the VOD content to the client. > > I was thinking of sharing the connection buffer across the cluster if > the connection is of type RTMPTConnection. When the connection is of type > RTMPT, we use a buffer for each connection to save the packets that will be > sent to the client. These packets includes AV packets, RSO packets, > invocation result etc. When the client's request is distributed to one of > the node, the server retrieves packets in the buffer and sends to the > client. So all kinds of services, regardless of VOD, Live or RSO, can be > shared without the need to share the whole connection or stream objects. > > What do you think? > > Of course, I share Steve Harris's lack of knowledge of the internals of > > Red5, so my observation might be dumb, nonsensical, or both for which > > I > > apologize in advance. > > > > > > Steve, > > > > On 6/16/07, sharrissf < [EMAIL PROTECTED] > wrote: > > > > > > > > > Assuming the stream fits in memory and just has multiple people > > accessing > > > it > > > I suspect it could be clustered with Terracotta. Though I would need > > to > > > know > > > more details to know for sure as I'm not that familiar with how they > > work > > > and are implemented. My thinking is that everyone in this case is > > > essentially sharing the same stream so really only one instance ends > > up in > > > each jvm and all the meta-data associated with each user is only in > > the > > > jvm > > > where the person is connected. > > > > > > The live stream is pushed to the subscribers just like what Remote > > SharedObject does so if configured properly I believe it can be > > clustered by > > TC. But I doubt that this is practically realistic because > > (1) The amount of AV data is much bigger than that of RSO. So much > > more data > > will be transfered across the nodes. > > (2) When the amount of data arises, the transfer latency will also > > arise and > > the real time requirement of live streaming is compromised. > > > > Anyway we can implement it technically and whether it's practical will > > be > > decided by the application. > > > > -- > > View this message in context: > > http://www.nabble.com/Load-balancing-for-live-streams-tf3926799.html#a11155612 > > Sent from the Red5 - English mailing list archive at Nabble.com. > > > > > > _______________________________________________ > > Red5 mailing list > > [email protected] > > http://osflash.org/mailman/listinfo/red5_osflash.org > > > > > > -- > I cannot tell why this heart languishes in silence. It is for small > needs it never asks, or knows or remembers. -- Tagore > > Best Regards > Steven Gong > > _______________________________________________ > Red5 mailing list > [email protected] > http://osflash.org/mailman/listinfo/red5_osflash.org > > _______________________________________________ Red5 mailing list [email protected] http://osflash.org/mailman/listinfo/red5_osflash.org
-- I cannot tell why this heart languishes in silence. It is for small needs it never asks, or knows or remembers. -- Tagore Best Regards Steven Gong
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