Bug 1293467 - getting "bad magic" when running pmcollectl on current data archive
getting "bad magic" when running pmcollectl on current data archive
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: pcp (Show other bugs)
Unspecified Unspecified
unspecified Severity high
: rc
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Assigned To: Nathan Scott
Depends On:
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Reported: 2015-12-21 15:02 EST by Dwight (Bud) Brown
Modified: 2016-01-04 12:25 EST (History)
6 users (show)

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Last Closed: 2015-12-22 12:46:08 EST
Type: Bug
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Description Dwight (Bud) Brown 2015-12-21 15:02:30 EST
Description of problem:
# pmcollectl -sD -p /var/log/pcp/pmlogger/<hostname>/20151221.14.26.0
pmcollectl: archive folio /var/log/pcp/pmlogger/<hostname>/20151221.14.26.0 has bad magic

# ls -l /var/log/pcp/pmlogger/<hostname>/20151221.14.26.0
-rw-r--r--. 1 pcp pcp 105656748 Dec 21 14:43 /var/log/pcp/pmlogger/<hostname>/20151221.14.26.0

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Comment 2 Lukas Berk 2015-12-21 15:53:18 EST
Hi Dwight,

Are these log files from the default pmlogger instance? If so, does using the -a (archive) option work, instead of the -p option (meant for archive folio formats instead)?

Aka, something like #pmcollectl -sD -a /var/log/pcp/pmlogger/<hostname>/20151221.14.26.0
Comment 3 Dwight (Bud) Brown 2015-12-22 10:09:38 EST
-a is invalid/not supported option?  help file says -p?

# pmcollectl -sD -a /var/log/pcp/pmlogger/<hostname>/20151222.00.10.0 
pmcollectl: invalid option -- 'a'
Usage: pmcollectl [options]
Interactive: [-v] [-h host] [-s subsys] [-c N] [-i N] [-R N]
Write raw logfile: pmcollectl -f rawfile [-c N] [-i N] [-R N]
Read raw logfile: pmcollectl -p rawfile

  -v, --verbose         Produce verbose output
  -p, --playback        Read sample data from file
  -c COUNT, --count=COUNT
                        Number of samples
  -f FILENAME, --filename=FILENAME
                        Name of output file
  -R N, --runtime=N     How long to take samples
  -i N, --interval=N    The sample time interval
  -s SUBSYS, --subsys=SUBSYS
                        The subsystem to sample
  -h HOST, --host=HOST  metrics source is PMCD on host
  -V, --version         display version number and exit
  -?, --help            show this usage message and exit
Comment 4 Frank Ch. Eigler 2015-12-22 10:14:56 EST
Older pmcollectl only deals with "archive folios", which are like groups of archive files, and reads from them with the -p (playback) option.  Newer pmcollectl deals directly with archives too, and reads from them with the more pcp-typical -a option.
Comment 5 Frank Ch. Eigler 2015-12-22 12:46:08 EST
One can create archive-folios from archive files using the mkaf program:

# cd /var/log/pcp/*/$HOSTNAME
# /usr/libexec/pcp/bin/mkaf ARCHIVE-FILE > my.af
# cat my.af 
# pmcollectl -p my.af

(Note that the .af file should be in the same directory as the archives themselves.)

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