| 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 <2016> 2017 2018 2019 2020 2021 2022 2023 2024 2025 | Index | 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 <2016> 2017 2018 2019 2020 2021 2022 2023 2024 2025 |
| <== Date ==> | <== Thread ==> |
|---|
| Subject: | Re: IOC and its OS health monitoring |
| From: | Dohn Arms <[email protected]> |
| To: | <[email protected]> |
| Date: | Thu, 22 Dec 2016 14:05:31 -0600 |
Recsync is now being maintained by Dylan Maxwell. https://github.com/ChannelFinder/recsync Recsync is intended to maintain a authoritative central database of all records provided by all IOCs. In order to be authoritative, each IOC maintains a persistent TCP connection to a central server. This gives some feature overlap with aliveRecord*. Zero configuration is a goal. No per-IOC config is required. Just link in the reccaster support module. There is an optional .db which provides connection status. While intended to be used with channelfinder, it is not tightly coupled, and could be used with other databases. * In my ideal super efficient world, aliveRecord would use the recsync protocol.
The alive daemon I maintain for my group has zero configuration as well. Just point the alive record to the daemon, and it adds the IOC to the database, and infrequently probes for information. All the information for doing this is in the alive packet.
UDP packets are used because if the packets get lost, the IOC doesn't care. There's no worrying about reconnecting if the server goes down, as there is no persistent connection with UDP. The design of alive is to minimize the affect of the remote server on the IOC. The only direct connection allowed from the server is in the form of allowing a connection on a TCP port, alive shoves its information into it, and immediately closes it. The server can't write to the IOC or even keep a port open.
With UDP, I have all UDP packets incoming onto the same port on the server, and the same thread just keeps reading packets off the same port. If the IOC information needs to be read using the TCP port on the IOC, I just spawn a temporary thread for that purpose. There is also no buffer allocated for UDP. With TCP, each connection get passed off to a new port, needing a separate socket which also has its own buffer attached to it. As we have hundreds of IOCs talking to the server, I don't want a TCP connection.
So, alive is not switching to TCP.... Dohn