Re: [PHP4BETA] Databases and multithreading

On Sat, 9 Oct 1999, Andreas Karajannis wrote: > "Thies C. Arntzen" wrote: > > > > > > nope - as plist is per-thread as well. > > > Just to clarify things: Does this mean plist is not really > persistent and all data is lost after request shutdown? not after request shutdown - but when the thread shutds down! all the multi-threaded servers will reuse their threads for many reqests (like MaxReqestPerChild in apache). but again plist is *NOT* shared between processed - the good thing is we don't have to mutex plist - the bad thing - we don't have an API yet for sharing data (resources) beween threads! > > > > > this should not really be an issue - question is if the db-libs are > > thread-save and if they like to be initialized multiple times. > > > > if we want connection-pooling we need to think about something different > > which can share data between threads. > > > Yes, there should be a central instance that hands out connections and > handles concurrency - as aolserver does. yep- > We have to change the whole database connection mechanism or implement > some clever list-based mechanism, which would minimize the impact on the > various database modules. i think the do_logon (list, plist, hashed_details etc) stuff in the various db-modules is the most complicated part of the db-modules - i think we'll have to do something about that soon(er or later)! regards, tc > > -Andreas > > -- > PHP 4 Beta > > Thies C. Arntzen "One Big-Mac, Small Fries and a Coke!" Digital Collections Phone +49 40 235350 Fax +49 40 23535180 Hammerbrookstr. 93 20097 Hamburg / Germany