The other problem with sharing writable data in "memory" is that it would not necessarily shared between multiple server instances. We run multiple mod_perl instances for reliability. Agree with other posters either use something like redis or memcache (possibly backed with a database).
-----Original Message----- From: David Booth <da...@dbooth.org> Sent: 25 August 2021 00:51 To: modperl <modperl@perl.apache.org> Subject: Sharing read/WRITE data between threads? [EXT] I am using Apache/2.4.41 (Ubuntu), with mod_perl. Apache uses multiple threads, and I want to share read/WRITE data between threads. (I.e., I want to be able to modify some shared data in one thread, such that other threads can see those changes.) In "Practical mod_perl" Stas Bekman describes how to share read-only data between threads, but says nothing about how to share WRITABLE data between threads. Any clues about how this can be done? I've searched high and low and found nothing. I will also want to know what mechanisms are available to coordinate access to that shared data, such as locks or semaphores. I also posted this message to StackOverflow, but got no response so far: https://urldefense.proofpoint.com/v2/url?u=https-3A__stackoverflow.com_questions_68901260_how-2Dto-2Dshare-2Dread-2Dwrite-2Ddata-2Din-2Dmod-2Dperl-2Dapache2&d=DwICaQ&c=D7ByGjS34AllFgecYw0iC6Zq7qlm8uclZFI0SqQnqBo&r=oH2yp0ge1ecj4oDX0XM7vQ&m=qpyZVoG2Lx8wqNIB_pQ9wXQkohMh_5Q0HVZmgqmlSbs&s=oUnmv2w8aVNzfIni8nxA0CFh-xrZv1GS8jFquKbzsQM&e= Any help would be appreciated! Thanks, David Booth -- The Wellcome Sanger Institute is operated by Genome Research Limited, a charity registered in England with number 1021457 and a company registered in England with number 2742969, whose registered office is 215 Euston Road, London, NW1 2BE.
