Logical Logs -Explain

Posted in 1997

"S.Sathish" — 3 Dec 1997 02:33:31 -0500 — source: Informix-list mailing list archive (1991-1998)

Hi, Regarding Flushing of logs/buffers to disk 1)What is a FOREGROUND WRITE? 2) "If page cleaner activity begins and a modified page is writtn to disk ,it would be possible for the modified version of the page to be on disk , but the before image to still be in the Physical logbuffer.Also, if a user thread initiated a foreground write on such a page , the same situation could occur" What does the last sentence mean? Thanks, ****************************************************************************** S.Sathish CMC Ltd., Bangalore-INDIA email :ssathish@cmcbang.ernet.in ******************************************************************************