disk.so

berkeley db 4.6.21的源码。berkeley db是一个简单的数据库管理系统

m4_comment([$Id: disk.so,v 1.9 2000/12/21 18:37:09 bostic Exp $])

m4_ref_title(Upgrading m4_db Applications,
    Release 3.1: upgrade requirements,,
    upgrade.3.1/logalloc, upgrade.3.2/intro)

m4_p([dnl
Log file formats and the Btree, Queue, Recno and Hash Access Method
database formats changed in the m4_db 3.1 release.  (The on-disk
Btree/Recno format changed from version 7 to version 8.  The on-disk
Hash format changed from version 6 to version 7.  The on-disk Queue
format changed from version 1 to version 2.)  Until the underlying
databases are upgraded, the m4_refT(dbh_open) will return a
m4_ref(DB_OLD_VERSION) error.])

m4_p([dnl
An additional flag, m4_ref(DB_DUPSORT), has been added to the
m4_refT(dbh_upgrade) for this upgrade.   Please review the
m4_ref(dbh_upgrade) documentation for further information.])

m4_p([dnl
For further information on upgrading m4_db installations, see
m4_link(M4RELDIR/ref/upgrade/process, Upgrading m4_db
installations).])

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