Site to Site Communication (with or without) PDL

This topic has 2 replies, 3 voices, and was last updated 18 years ago by Jim Kosloskey.

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December 21, 2006 at 12:30 pm #48962
Amit Anand
Participant
Hi Guys

We are doing site to site communication in two different ways:

1. With use of PDL ( lenAck.pdl) tcpip connection:

This pdl driver manages the transmission of messages using 4 byte binary

length encoding. Acknowledgements are also processed within the pdl.

2. Without any PDL, simple tcpip connection:

This way a simple tcpip connection is established with a specific port on localhost.

Any recomendations as to which one of the two is better and for what reasons.

Thanks for the help,

Amit
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- December 21, 2006 at 1:35 pm #60255
  Charlie Bursell
  Participant
  IMHO, the standard TCP/IP (Length Encoded) Prototocol is more ergonomic since the driver does not have to examine every byte as it would for encapsulated (MLP).
  
  Just use the defaults and set up recover_33 as with any thread. The only things I do different is to send back a simple ACK rather than an HL7 ACK and set a long timeout, typically 300, in the await Replies.
- December 21, 2006 at 1:54 pm #60256
  Jim Kosloskey
  Participant
  Amit,
  
  I also prefer the length-encoded protocol.
  
  However, when the receiving thread is down, the log in the sending site will contain ‘reconnect’ noise that is not there with PDL. Some find this unsavory – not me.
  
  I also prefer a short ‘ACK’ reply message.
  
  Jim Kosloskey
  
  email: jim.kosloskey@jim-kosloskey.com 29+ years Cloverleaf, 59 years IT - old fart.
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