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- ssssttttaaaattttdddd((((1111MMMM)))) ssssttttaaaattttdddd((((1111MMMM))))
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- NNNNAAAAMMMMEEEE
- statd - network status monitor daemon
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- SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
- ////uuuussssrrrr////eeeettttcccc////rrrrppppcccc....ssssttttaaaattttdddd
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- DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
- _s_t_a_t_d is an intermediate version of the status monitor. It implements a
- simple protocol that allows applications to monitor the status of other
- machines. _l_o_c_k_d(1M) uses _s_t_a_t_d to detect both client and server
- failures.
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- _s_t_a_t_d is started during system initialization if the _c_h_k_c_o_n_f_i_g(1M) lllloooocccckkkkdddd
- flag is set oooonnnn.
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- Applications use RPC to register machines they want monitored by _s_t_a_t_d.
- The status monitor maintains a database of machines to track and the
- corresponding applications to notify of crashes. It also maintains a
- database of machines to notify upon recovery of its own host machine and
- a counter of the number of times it has "recovered."
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- FFFFIIIILLLLEEEESSSS
- /var/statmon/sm machines to monitor
- /var/statmon/sm.bak machines to notify upon recovery
- /var/statmon/state recovery counter (a.k.a. version number)
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- SSSSEEEEEEEE AAAALLLLSSSSOOOO
- lockd(1M), network(1M), statmon(4).
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- BBBBUUUUGGGGSSSS
- The crash of a site is detected only upon its recovery.
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- PPPPaaaaggggeeee 1111
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