pmdasenderror(3) — Linux manual page


PMDASENDERROR(3)          Library Functions Manual          PMDASENDERROR(3)

NAME         top

       pmdaSendError - send an error PDU to PMCD

C SYNOPSIS         top

       #include <pcp/pmapi.h>
       #include <pcp/pmda.h>

       void pmdaSendError(pmdaInterface *dispatch, int err);

       cc ... -lpcp_pmda -lpcp


       from pcp.pmda import PMDA

DESCRIPTION         top

       As part of the Performance Metrics Domain Agent (PMDA) API (see
       PMDA(3)), this routine allows a PMDA to send an error PDU to PMCD.
       There is presently only one use for this - so the PMDA can inform
       PMCD that it is ready (or not ready) to process requests.

       The protocol details are described in pmcd(1) and PMDA(3), but
       basically if a PMDA starts in the notready state (as may be specified
       in pmcd.conf, see pmcd(1)) then PMCD will not send it any requests
       until the PMDA sends an PM_ERR_PMDAREADY error PDU using this
       function.  This is used by a PMDA that may have a long startup time,
       e.g. to process a large configuration file or similar.

SEE ALSO         top

       PMAPI(3), PMDA(3), pmcd(1), and pmdaopenmetrics(1).

COLOPHON         top

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Performance Co-Pilot                 PCP                    PMDASENDERROR(3)