NAME

jcopy − Perform volume-to-volume copy on Jaquith system

SYNOPSIS

jcopy [-srcvol volumeId] [-destvol volumeId] [-v] [-mgrserver hostname] [-mgrport port] [-updatefreq filecount] [-bufsize bytes]

OPTIONS

−srcvolThe source volume Id. 

−destvolThe destination volume Id. 

−vTurn on verbose mode which prints status during operation. 

−mgrServer hostname
Specifies host where Jmgr server is running.

−mgrPort port
Specifies port number where Jmgr server is running.

−updatefreq filecount
Report progress every filecount files.  This parameter is ignored if the -v is not given. 

−bufsize bytesTransfer data in units of size bytes. 

DESCRIPTION

Jcopy is volume-to-volume utility for the Jaquith system. 
 

Jcopy copies one Jaquith volume to another, in its entirety.  The assumption is that the source tape is growing old and that the data is being rolled forward to a new tape.  Therefore, Jcopy attempts to keep Jaquith’s view of the world up-to-date by editing various configuration files.  The user is prompted about these changes at the appropriate time. 
 

Omitting the -destvol option entirely will cause jcopy to obtain a volume from Jaquith’s free volume list. 
 

Jcopy negotiates with jmgr to mount the volumes. This means that jcopy can run while the system is publicly available. 
 

Jcopy does not connect to the public port managed by the Jaquith process to discourage its use as a client program. This is because Jcopy makes no attempt to obtain the two devices atomically.  Therefore it’s possible for two jcopy processes to deadlock, each holding 1 device and unable to get the other. 
 

BUGS

None known. 
 

SEE ALSO

jaquith jmgr jls jstat jput jget jctrl jclean jbuild
 

KEYWORDS

jaquith archive
 

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