BIND Time formats

BIND allows a number of time formats in combinations. Formats allowed are (case insensitive):

• #s = seconds = # x 1 seconds (really!)
• #m = minutes = # x 60 seconds
• #h = hours = # x 3600 seconds
• #d = day = # x 86400 seconds
• #w = week = # x 604800 seconds

Examples

; foo.com zone file fragment
; common origin (@) format
@           IN      SOA   ns.foo.com. root.foo.com. (
               2003080800 ; serial number
               10800s     ; refresh =  3 hours
               15M        ; update retry = 15 minutes
               3W12h      ; expiry = 3 weeks + 12 hours
               2h20M      ; minimum = 2 hours + 20 minutes
               )
www 12H15m  IN     A      10.0.5.17 ; A record TTL value

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