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NC_Packet_Loss_Test

FileMaker Packet Loss Test

utility to ping from filemaker client to filemaker host

there should be 0% packet loss

Requires

base elements

https://docs.baseelementsplugin.com/article/522-downloads

Command line

Mac

ping -c 10 -s 1500 www.claris.com

Windows

ping -n 10 -l 1500 www.claris.com

Community Documentation

https://community.claris.com/en/s/article/dep006---under-the-hood--server-performance---jon-thatcher

Background

Under the Hood: 
 Server Performance

COR001 Jon Thatcher Senior Architect, FileMaker, Inc. © 2016 FileMaker, Inc.

Slide 35

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DO: Plan for the WAN Latency

  • Time delay in the network between request and response
  • WAN may have 100 millisecond latency per round trip (vs 2ms on LAN) TCP/IP default packet size is 1500 bytes
  • 266000 bytes sent to client / 1500 bytes per packet = 177 round trips! - 177 round trips * 100ms latency = 17.7 seconds to send data!

NOTE: This is a gross over-simplification and probably an over estimate!

TCP/IP will send multiple 1500 byte packets at once, without waiting for acknowledgement of each packet In most cases there are many fewer full round trips than this, but it’s still a decent rule of thumb for estimating transfer time