NAME

jbuild − Reconstruct Jaquith disk index from tertiary storage

SYNOPSIS

jbuild [-root rootPath] [-dev device] [-v] [-clobber]  [-noindex] [-save] [-first first-file]  [-last last-file] [-before date]  [-after date] [-matchpath path-expression] [-matchtbuf tbuf-expression]

OPTIONS

−root rootpathSpecify root of index tree. 

−dev deviceThe name of the reader device. 

−vTurn on verbose mode which prints status during operation. 

−clobberOverwrite the disk index with the tape index. 

−noindexRestore the thdr file from tape but don’t rebuild the index.  This implies -save. 

−saveSave the thdr file after index is restored. 

−first first-fileNumber of first thdr file to restore. (0 == first file on tape). 

−last last-fileNumber of last thdr file to restore. (-1 == last file on tape). 

−matchPath pathname
Restore only files that match the path pathname according to Unix globbing rules. 

−matchtbuf tbuf-num
Restore only files that match the tbuf number tbuf-num according to Unix globbing rules. 

−before dateRestore only entries archived before date. 

−after dateRestore only entries archived after date. 

−bufsize bytesize
Read from tape in bytesize units. 

DESCRIPTION

Jbuild is a system manager’s utility for the Jaquith system.  It’s purpose is to rebuild Jaquith’s disk index from tape in the event of disk crash. 
 

Jbuild processes a single Jaquith tape by restoring a sequence of index (thdr) file, parsing them, and rebuilding the tree structure on disk.  Several arguments control the details of the restoration: The -first and -last arguments limit the range of thdr files which are read from tape. The -matchpath argument restricts restoration to user file pathnames which match pathname.  The -noindex option inhibits the rebuilding of the disk index entirely; only the raw thdr files are restored. 
 

Jbuild is not network-aware since it is not for use by clients. It assumes that it has direct access to the readers. 
 

date is of the form DateSpec[:TimeSpec]. TimeSpec is of the form [hh[:mm[:ss]]], and DateSpec is of the form dd-month[-yyyy]. Month is the first 3 letters of the month; all others are numbers. The ’/’ character is a substitute for ’-’ and ’.’ may be used instead of ’:’. 
 

FILES

Jbuild creates a temporary work file in the Jaquith root called rebuild.pid. The work file will be renamed arch/thdr.number after the thdr file has been restored to its archive, or thdr.pid.count, if the file appears to be bogus. 
 

BUGS

Jbuild can restore only one volume at a time; several invocations may be necessary to restore an entire logical archive. 
 

SEE ALSO

jaquith jmgr jls jstat jput jget jctrl jcopy jclean
 

KEYWORDS

jaquith archive
 

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