Thursday Oct 16, 2008

Barebones framework in place for snoop!

I just got a framework in place for a table driven approach for snoop to decode the Control Protocol used between our DS and MDS servers for pNFS.

Here you can see the DS talking to the MDS and the MDS sending a NULL query:

[th199096@pnfs-9-25 ~]> sudo snoop.ctl -i /root/ds2tmds.snoop | grep CTL
  4   0.00596    pnfs-9-25 -> pnfs-9-26.Central.Sun.COM CTL-DS C DS_EXIBI
  6   0.00000 pnfs-9-26.Central.Sun.COM -> pnfs-9-25    CTL-DS R DS_EXIBI
  8   0.00009    pnfs-9-25 -> pnfs-9-26.Central.Sun.COM CTL-DS C DS_REPORTAVAIL
 13   0.00000 pnfs-9-26.Central.Sun.COM -> pnfs-9-25    CTL-MDS C MDS_NULL
 15   2.99097    pnfs-9-25 -> pnfs-9-26.Central.Sun.COM CTL-MDS R MDS_NULL
 17   0.00012 pnfs-9-26.Central.Sun.COM -> pnfs-9-25    CTL-DS R DS_REPORTAVAIL

Guess I'll have to file in the guts of this to see what is really being said here!


Originally posted on Kool Aid Served Daily
Copyright (C) 2008, Kool Aid Served Daily
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