On Fri, Aug 31, 2001 at 06:58:57PM +0100, tonyl wrote:
On Friday 31 Aug 2001 16:32 pm, Jim Penny wrote:
Reliabilty is good. To make it better, I run Jerome Alet's isdazope script. It checks to make sure zope is responsive at 1 minute intervals. If not, it restarts zope. I seem to get about 2 restarts per week. These usually involve write conflicts.
Are you saying zope crashes or fails twice a week? Surely that makes it unusable in a real environment, or is "write conflict" a bug in the site's implentation of zope? I'm confused!
(There is a known rare bug in the 2.3 series whereby the transaction machinery to an external database forgets to close transactions. I may be seeing by this. I may be taking an occasional cosmic ray, who knows.) Yes, I am saying that the version I have crashes once or twice a week. No, it does not make it at all unusable. There are 86400 minutes in a week. this makes it available 99.9976% of the time. It is automatically restarted after a minute without response goes by, so I do not have to be here, etc. Apache in my experience is better in terms of uptime. But I have had it crash, too. I have had PostgreSQL crash. I have has AS/400 services crash. Once you get beyond 3 9's of uptime, it starts to cost money. I am running on clone hardware with no ECC, etc. Prepare not to have 99.999% uptime, and you can handle 99.99% uptime quite well. BTW: I am not using zope in a "typical" profile. I am doing far more relational database work than appears to be normative. I am doing more concurrent writing than appears to be normative. (My PostgreSQL log file is about 15 Meg per day. so far today I have done 24,000 inserts, 1,000 inserts and 600 updates, and as the last day before holiday, this is very light). Given my experience, I can whole-heartedly recommend zope, and I suspect that most users would find less trouble with it than I do. isdazope is very useful. It can take care of restarting things so that a typical crash lasts no more than 60 seconds, unattended.
_______________________________________________ Zope maillist - Zope@zope.org http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )