MESSAGE
| DATE | 2021-08-25 |
| FROM | David Booth
|
| SUBJECT | Re: [Hangout - NYLXS] Sharing read/WRITE data between threads? [EXT]
|
Thank you Brad, Jacques and James, for your thoughtful suggestions. I
think Brad is right: I should see if I can figure out a different
approach, instead of trying to do this. It's looking like it would be
more trouble than it's worth. But I'm glad to know about those other
options in case I need them!
Thanks,
David Booth
On 8/25/21 7:56 AM, James Smith wrote:
> 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
> Sent: 25 August 2021 00:51
> To: modperl
> 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
>
>
>
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