Replication Schedule

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The schedule attribute of a site link is a 188-byte array that is interpreted as follows:

#0 = array length, i.e. 188
#1 - #19 = metadata that appears to be pretty much static
#20 - #187 = Replication for the specific hour in UTC
#20 = {Sunday 00:00 to 00:59}
#21 = {Sunday 01:00 to 01:59}
...
#43 = {Sunday 23:00 to 23:59}
#44 = {Monday 00:00 to 00:59}
#45 = {Monday 01:00 to 01:59}
...
#67 = {Monday 23:00 to 23:59}
...
#187 = {Saturday 24:00 to 23:59}

The values for specific hours are interpreted differently for Site Links and nTDS connections (replication partnerships):

  • For a replication partnership, possible values are 0 to 15, each of the four bits denoting a particular quarter of the hour so 0 means no replication, 1 means only replicate in minute 0-14, means twice per hour in minute 0-14 and 30-44 whereas 15 means replicate every 15 minutes
  • For a Site Link, 240 (i.e. 1111 0000) means no replication whereas 255 (i.e. 1111 1111) means replicate through the hour as scheduled.

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