m4_comment([$Id: memp_fget.so,v 1.5 2003/10/18 19:16:18 bostic Exp $])m4_ref_title(Upgrading m4_db Applications,    [Release 3.3: memp_fget, EIO],,    upgrade.3.3/conflict, upgrade.3.3/txn_prepare)m4_p([dnlPrevious releases of m4_db returned the system error EIO when thememp_fget function was called to retrieve a page, the page did notexist, and the m4_ref(DB_MPOOL_CREATE) flag was not set.  In the 3.3release, the error m4_ref(DB_PAGE_NOTFOUND) is returned instead, toallow applications to distinguish between recoverable andnon-recoverable errors.  Applications calling the memp_fget functionand checking for a return of EIO should check form4_ref(DB_PAGE_NOTFOUND) instead.])m4_p([dnlPrevious releases of m4_db treated filesystem I/O failure (the mostcommon of which the filesystem running out of space), as a fatal error,returning m4_ref(DB_RUNRECOVERY).  When a filesystem failure happens inthe 3.3 release m4_db returns the underlying system error (usually EIO),but can continue to run.  Applications should abort any enclosingtransaction when a recoverable system error occurs in order to recoverfrom the error.])m4_page_footer