Re: Logical log backup - Why!?

This feature was only recently implemented, right? ~7.2x? Previously, (7.1x?) setting LTAPEDEV to /dev/null _did_ mean your backups were sent to that device when you ram `ontape`. But newer versions simply free the used logical logs if online is initialized w/ the LTAPEDEV setting of /dev/null - and you don't need to run `ontape` to dump the logs. Mark D. Stock wrote: > Gary L. Burnore wrote: > > > > On 4 Dec 1997 03:50:52 GMT, "Irwin Goldstein" <irwin@objectsoft.com> > > wrote: > > > > :It really depends on your needs. If the risk of losing a day's > worth > > of > > :data is acceptable, then setting the log tape device (LTAPEDEV) to > > :/dev/null is a reasonable option. If you do this, you don't even > > need to > > :run the continuous backup -- the engine seems to know that /dev/null > > means > > :the backup would only be thrown away and therefore frees each log as > > soon > > :as it is no longer needed for rolling back open transactions. > > > > I was under the impression that setting it to /dev/null actually wrote > > the > > output that would normally go to tape (/dev/rct or whatever) to > > /dev/null. > > Not that it would understand the string /dev/null to mean don't back > > it up. > > No, /dev/null is seen as a special device, and your logs are thrown > away. This is regardless of whether you intend to use OnTape or not, > so be careful to set this field to anything OTHER than /dev/null if you > want to back up your logs with say OnBar. > > Cheers, > -- > Mark. > > +----------------------------------------------------------+-----------+ > |Mark D. Stock - Informix SA http://www.informix.com |//////// /| > |mailto:mdstock@informix.com FAQ http://www.iiug.org |///// / //| > | +-----------------------------------+//// / ///| > | Tel: +27 11 807 0313 |If it's slow, the users complain. |/// / ////| > | Fax: +27 11 807 2594 |If it's fast, the users keep quiet.|// / /////| > |Cell: +27 83 250 2325 |Therefore, "No news: travels fast"!|/ ////////| > +----------------------+-----------------------------------+-----------+ -- * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ADDRESS ALTERED TO FOIL SPAMMERS: Remove "*NO-SPAM*" to reply. Cosmo Lee Multi-User Computer Systems Brooklyn, NY "JUST SAY 'NO' TO SPAM" * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *