Re: [Zope-dev] Read only ZEO
You may want to ask these questions on the zodb-dev list instead of on here... more likely to get the answers in a timely way.. - Original Message - From: Tim Hoffman [EMAIL PROTECTED] To: Dieter Maurer [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Sent: Monday, October 01, 2001 11:41 PM Subject: Re: [Zope-dev] Read only ZEO HI Dieter I had a look at z2.py (it's actually -r) so any way I tried (not too successfully). I have zeo running with 2.4.1 I have a zss and 2 zeo clients. One running without -r switch and one running with -r In z2.py the -r switch is documented as follows -r Run ZServer is read-only mode. ZServer won't write anything to disk. No log files, no pid files, nothing. This means that you can't do a lot of stuff like use PCGI, and zdaemon. ZServer will log hits to STDOUT and zLOG will log to STDERR. Well when running a zeo client with -r switch results in no log files being written and the log is written to STDOUT, but the ZEO client is definately not in readonly mode ie I can create and modify documents. (It probably means it can;t cache to disk ;-) I need to track down where READ_ONLY flag is used. There isn't an occurrance with the ZEO code, so unless the READ_ONLY capability is implemented higher up in the transaction service, thenI think it isn't going to work. This document http://www.amk.ca/zodb/zodb-zeo.html which is linked to on the Zeo Product page actually mentions using Zeo client in readonly mode. I wonder if anyone has actually done it? Tim Dieter Maurer wrote: Tim Hoffman writes: In some of the overview documents discussing ZEO, there is reference to a ZEO client potentially mounted a ZSS in read only mode. (I want to have some ZEO's in read/write as well) When you start Zope with the -R option (I think, look at z2.py!), it is in read-only mode. I have been trying to work out how this might be achieved but have pretty much drawn a blank, has anyone done this I have any idea how I might go about doing such a thing. There is a patch at http://www.dieter.handshake.de/pyprojects/zope which allows Zope to be started with a read only storage. Maybe, you can adapt it for ZEO. Dieter ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope ) ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Read only ZEO
HI Dieter I had a look at z2.py (it's actually -r) so any way I tried (not too successfully). I have zeo running with 2.4.1 I have a zss and 2 zeo clients. One running without -r switch and one running with -r In z2.py the -r switch is documented as follows -r Run ZServer is read-only mode. ZServer won't write anything to disk. No log files, no pid files, nothing. This means that you can't do a lot of stuff like use PCGI, and zdaemon. ZServer will log hits to STDOUT and zLOG will log to STDERR. Well when running a zeo client with -r switch results in no log files being written and the log is written to STDOUT, but the ZEO client is definately not in readonly mode ie I can create and modify documents. (It probably means it can;t cache to disk ;-) I need to track down where READ_ONLY flag is used. There isn't an occurrance with the ZEO code, so unless the READ_ONLY capability is implemented higher up in the transaction service, thenI think it isn't going to work. This document http://www.amk.ca/zodb/zodb-zeo.html which is linked to on the Zeo Product page actually mentions using Zeo client in readonly mode. I wonder if anyone has actually done it? Tim Dieter Maurer wrote: Tim Hoffman writes: In some of the overview documents discussing ZEO, there is reference to a ZEO client potentially mounted a ZSS in read only mode. (I want to have some ZEO's in read/write as well) When you start Zope with the -R option (I think, look at z2.py!), it is in read-only mode. I have been trying to work out how this might be achieved but have pretty much drawn a blank, has anyone done this I have any idea how I might go about doing such a thing. There is a patch at http://www.dieter.handshake.de/pyprojects/zope which allows Zope to be started with a read only storage. Maybe, you can adapt it for ZEO. Dieter ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] Read only ZEO
Tim Hoffman writes: In some of the overview documents discussing ZEO, there is reference to a ZEO client potentially mounted a ZSS in read only mode. (I want to have some ZEO's in read/write as well) When you start Zope with the -R option (I think, look at z2.py!), it is in read-only mode. I have been trying to work out how this might be achieved but have pretty much drawn a blank, has anyone done this I have any idea how I might go about doing such a thing. There is a patch at http://www.dieter.handshake.de/pyprojects/zope which allows Zope to be started with a read only storage. Maybe, you can adapt it for ZEO. Dieter ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
[Zope-dev] Read only ZEO
Hi In some of the overview documents discussing ZEO, there is reference to a ZEO client potentially mounted a ZSS in read only mode. (I want to have some ZEO's in read/write as well) I have been trying to work out how this might be achieved but have pretty much drawn a blank, has anyone done this I have any idea how I might go about doing such a thing. I ideally I would like to control what clients can connect and whether read only or read/wright by IP and/or some token RGds Tim -- Tim Hoffman Zute Pty Ltd mobile: 0411 06 fax:+61 8 6210 1883 email: [EMAIL PROTECTED] ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
