Amanda-Users

dumper, chunker and amandad communication

2006-07-10 03:33:10
Subject: dumper, chunker and amandad communication
From: silpa kala <silpakala AT yahoo DOT com>
To: amanda-users AT amanda DOT org
Date: Mon, 10 Jul 2006 00:26:31 -0700 (PDT)
Hi,

I need some clarification on Amanda Internals.

Driver will initiate the chunker process and driver
will provide some information to the chunker process
like name of the file for holding disk, hostname,
level, datastamp etc.,
How the driver will send the information to the
chunker? either through pipes ?I copied some lines
from the amdump logfile.

driver: send-cmd time 4.768 to chunker0: PORT-WRITE
00-00001
/home/20060705194408/hostname._home_amanda-2.5.0p1-20060428_server-src.1
hostname fffffeff9ffeffff07
/home/amanda-2.5.0p1-20060428/ server-src 1
2006:7:6:0:42:13 1048576 GNUTAR 6624
|;auth=BSD;no-record;index;


chunker is trying to connect to one privileged port
no. Driver will initiate the dumper process and driver
will provide some information to dumper port no to
connect(what chunker initiated for the particular
port), hostname etc.,

driver: send-cmd time 4.778 to dumper0: PORT-DUMP
00-00001 784 hostname fffffeff9ffeffff07
/home/amanda-2.5.0p1-20060428/server-src NODEVICE 1
2006:7:6:0:42:13 GNUTAR |;auth=BSD;no-record;index;


Is there any socket communication is required between
the chunker and driver ? I got so much of confusion
with the amdump.1 log file. The contents i am sending
here from the log file

chunker: stream_accept: connection from
127.0.0.1.45601
dumper: stream_client: connected to 127.0.0.1.784
chunker: try_socksize: receive buffer size is 32768
dumper: stream_client: our side is 0.0.0.0.45601
dumper: try_socksize: send buffer size is 65536

What is the significance of this. Please explain?

Amandad log file is also having the information below:

amandad: try_socksize: send buffer size is 65536
amandad: try_socksize: receive buffer size is 65536

 I think the above two log information is
interconnected, what kind of information is sending
and receiving by dumper or chunker or amandad?

I need these clarifications. Please help me out to
understand these funda.

Thanks & Regards,
Silpakala


 







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