RE: When to use two tomcat instances
Sorry. I don't have all the answers (far from it), and even if I can answer a question, I don't always have the time to reply to every message. John -Original Message- From: chasee [mailto:janee_ya;yahoo.com] Sent: Wednesday, November 13, 2002 10:33 PM To: Tomcat Users List Subject: RE: When to use two tomcat instances Thanks, john for clearing it up. Seems this time I asked the correct question, so I got your reply. it's the first time I got my posted question answered... Chasee Turner, John [EMAIL PROTECTED] wrote: Two Tomcat instances = two separate installations of Tomcat. Different server.xml, different work directory, different webapp root. As far as when do you need it that's up to you, there is no hard and fast rule. We use multiple Tomcats because it allows us to segregate our clients' apps, and manage each Tomcat instance separately without interfering with the others. John -Original Message- From: chasee To: tomcat user Sent: 11/13/02 9:55 PM Subject: When to use two tomcat instances Hello all, Just got this question: when do we need two tomcat instances? and what does it mean? two copies of web server or the server creates two instances when it is started? I'd appreciate any response. Chasee - Do you Yahoo!? Yahoo! Web Hosting - Let the expert host your site -- To unsubscribe, e-mail: For additional commands, e-mail: - Do you Yahoo!? Yahoo! Web Hosting - Let the expert host your site -- To unsubscribe, e-mail: mailto:tomcat-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:tomcat-user-help;jakarta.apache.org
RE: When to use two tomcat instances
My bad. I used the word installation improperly. There is only one set of Tomcat binaries. John -Original Message- From: Josh G [mailto:josh;gfunk007.com] Sent: Wednesday, November 13, 2002 10:35 PM To: Tomcat Users List Subject: Re: When to use two tomcat instances You don't need two installs, just two server.xml files. I do it to keep both development and test versions of a site which uses the root context but doesn't justify an apache install. -Josh -- And can you tell me doctor why I still can't get to sleep? And why the channel 7 chopper chills me to my feet? And what's this rash that comes and goes, can you tell me what it means? God help me, I was only 19 - Original Message - From: Turner, John [EMAIL PROTECTED] To: 'chasee ' [EMAIL PROTECTED]; 'tomcat user ' [EMAIL PROTECTED] Sent: Thursday, November 14, 2002 1:18 PM Subject: RE: When to use two tomcat instances Two Tomcat instances = two separate installations of Tomcat. Different server.xml, different work directory, different webapp root. As far as when do you need it that's up to you, there is no hard and fast rule. We use multiple Tomcats because it allows us to segregate our clients' apps, and manage each Tomcat instance separately without interfering with the others. John -Original Message- From: chasee To: tomcat user Sent: 11/13/02 9:55 PM Subject: When to use two tomcat instances Hello all, Just got this question: when do we need two tomcat instances? and what does it mean? two copies of web server or the server creates two instances when it is started? I'd appreciate any response. Chasee - Do you Yahoo!? Yahoo! Web Hosting - Let the expert host your site -- To unsubscribe, e-mail: mailto:tomcat-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:tomcat-user-help;jakarta.apache.org -- To unsubscribe, e-mail: mailto:tomcat-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:tomcat-user-help;jakarta.apache.org -- To unsubscribe, e-mail: mailto:tomcat-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:tomcat-user-help;jakarta.apache.org
RE: When to use two tomcat instances
Let's get the terminology correct. We currently run Tomcat for 2 dozen clients. Each client has their own Tomcat. There is only one bin directory (/usr/local/tomcat/bin). There are multiple server.xml files, multiple work directories, and multiple webapp roots. One server.xml, one work directory, and one webapp root per client. With this configuration, I can stop and start individual instances (or whatever word you want to use) of Tomcat at will, without affecting any of the others. All instances of Tomcat use the same JVM/JAVA_HOME. Each server.xml = one instance Each instance is manageable by itself without bothering other instances. John -Original Message- From: Christopher Moon [mailto:cmoon;fas.harvard.edu] Sent: Wednesday, November 13, 2002 10:54 PM To: Tomcat Users List Subject: Re: When to use two tomcat instances I use multiple Tomcat instances...one for production, testing, development and training. I have decided to get with multiple instances for testing and development it is nice to be able to test different versions of the JDK, which to the best of my knowledge you cannot set in the server.xml and it must be set via the $JAVA_HOME enviroment variable. Please let me know if this is incorrect because it would be great to not have to keep multiple instances. However, there is one other concern that made up go with multiple instances. Suppose, you make a change to the server configuration that requires you to restart the instance. If you are running one instance with multiple server.xml's and restart the testing instance you will also restart the production instance. Again if I am wrong please let me know. Hope this helps Chris On Thu, 14 Nov 2002, Josh G wrote: You don't need two installs, just two server.xml files. I do it to keep both development and test versions of a site which uses the root context but doesn't justify an apache install. -- To unsubscribe, e-mail: mailto:tomcat-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:tomcat-user-help;jakarta.apache.org -- To unsubscribe, e-mail: mailto:tomcat-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:tomcat-user-help;jakarta.apache.org
Re: When to use two tomcat instances
On 13 Nov 2002, kathee wrote: Date: 13 Nov 2002 23:11:32 -0500 From: kathee [EMAIL PROTECTED] Reply-To: Tomcat Users List [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] Subject: Re: When to use two tomcat instances Is there a way, using the server.xml files to tell the instances to listen on the same port, but on different NICs?? Yes. The key is to use the address attribute in your Connector element to define the IP address of the NIC that this particular connector should listen on. Of course, you'll probably want to make sure you've got your DNS set up with different hostnames for the different NICs, but that's outside the domain of Tomcat ... Kat Craig -- To unsubscribe, e-mail: mailto:tomcat-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:tomcat-user-help;jakarta.apache.org
RE: When to use two tomcat instances
Two Tomcat instances = two separate installations of Tomcat. Different server.xml, different work directory, different webapp root. As far as when do you need it that's up to you, there is no hard and fast rule. We use multiple Tomcats because it allows us to segregate our clients' apps, and manage each Tomcat instance separately without interfering with the others. John -Original Message- From: chasee To: tomcat user Sent: 11/13/02 9:55 PM Subject: When to use two tomcat instances Hello all, Just got this question: when do we need two tomcat instances? and what does it mean? two copies of web server or the server creates two instances when it is started? I'd appreciate any response. Chasee - Do you Yahoo!? Yahoo! Web Hosting - Let the expert host your site -- To unsubscribe, e-mail: mailto:tomcat-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:tomcat-user-help;jakarta.apache.org
RE: When to use two tomcat instances
Thanks, john for clearing it up. Seems this time I asked the correct question, so I got your reply. it's the first time I got my posted question answered... Chasee Turner, John [EMAIL PROTECTED] wrote: Two Tomcat instances = two separate installations of Tomcat. Different server.xml, different work directory, different webapp root. As far as when do you need it that's up to you, there is no hard and fast rule. We use multiple Tomcats because it allows us to segregate our clients' apps, and manage each Tomcat instance separately without interfering with the others. John -Original Message- From: chasee To: tomcat user Sent: 11/13/02 9:55 PM Subject: When to use two tomcat instances Hello all, Just got this question: when do we need two tomcat instances? and what does it mean? two copies of web server or the server creates two instances when it is started? I'd appreciate any response. Chasee - Do you Yahoo!? Yahoo! Web Hosting - Let the expert host your site -- To unsubscribe, e-mail: For additional commands, e-mail: - Do you Yahoo!? Yahoo! Web Hosting - Let the expert host your site
Re: When to use two tomcat instances
You don't need two installs, just two server.xml files. I do it to keep both development and test versions of a site which uses the root context but doesn't justify an apache install. -Josh -- And can you tell me doctor why I still can't get to sleep? And why the channel 7 chopper chills me to my feet? And what's this rash that comes and goes, can you tell me what it means? God help me, I was only 19 - Original Message - From: Turner, John [EMAIL PROTECTED] To: 'chasee ' [EMAIL PROTECTED]; 'tomcat user ' [EMAIL PROTECTED] Sent: Thursday, November 14, 2002 1:18 PM Subject: RE: When to use two tomcat instances Two Tomcat instances = two separate installations of Tomcat. Different server.xml, different work directory, different webapp root. As far as when do you need it that's up to you, there is no hard and fast rule. We use multiple Tomcats because it allows us to segregate our clients' apps, and manage each Tomcat instance separately without interfering with the others. John -Original Message- From: chasee To: tomcat user Sent: 11/13/02 9:55 PM Subject: When to use two tomcat instances Hello all, Just got this question: when do we need two tomcat instances? and what does it mean? two copies of web server or the server creates two instances when it is started? I'd appreciate any response. Chasee - Do you Yahoo!? Yahoo! Web Hosting - Let the expert host your site -- To unsubscribe, e-mail: mailto:tomcat-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:tomcat-user-help;jakarta.apache.org -- To unsubscribe, e-mail: mailto:tomcat-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:tomcat-user-help;jakarta.apache.org
Re: When to use two tomcat instances
I use multiple Tomcat instances...one for production, testing, development and training. I have decided to get with multiple instances for testing and development it is nice to be able to test different versions of the JDK, which to the best of my knowledge you cannot set in the server.xml and it must be set via the $JAVA_HOME enviroment variable. Please let me know if this is incorrect because it would be great to not have to keep multiple instances. However, there is one other concern that made up go with multiple instances. Suppose, you make a change to the server configuration that requires you to restart the instance. If you are running one instance with multiple server.xml's and restart the testing instance you will also restart the production instance. Again if I am wrong please let me know. Hope this helps Chris On Thu, 14 Nov 2002, Josh G wrote: You don't need two installs, just two server.xml files. I do it to keep both development and test versions of a site which uses the root context but doesn't justify an apache install. -- To unsubscribe, e-mail: mailto:tomcat-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:tomcat-user-help;jakarta.apache.org
Re: When to use two tomcat instances
Is there a way, using the server.xml files to tell the instances to listen on the same port, but on different NICs?? Kat On Wed, 2002-11-13 at 22:34, Josh G wrote: You don't need two installs, just two server.xml files. I do it to keep both development and test versions of a site which uses the root context but doesn't justify an apache install. -Josh -- kathee [EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:tomcat-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:tomcat-user-help;jakarta.apache.org
Re: When to use two tomcat instances
Nah it's multiple instances, just one install is what i was trying to say. -Josh -- And can you tell me doctor why I still can't get to sleep? And why the channel 7 chopper chills me to my feet? And what's this rash that comes and goes, can you tell me what it means? God help me, I was only 19 - Original Message - From: Christopher Moon [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] Sent: Thursday, November 14, 2002 1:54 PM Subject: Re: When to use two tomcat instances I use multiple Tomcat instances...one for production, testing, development and training. I have decided to get with multiple instances for testing and development it is nice to be able to test different versions of the JDK, which to the best of my knowledge you cannot set in the server.xml and it must be set via the $JAVA_HOME enviroment variable. Please let me know if this is incorrect because it would be great to not have to keep multiple instances. However, there is one other concern that made up go with multiple instances. Suppose, you make a change to the server configuration that requires you to restart the instance. If you are running one instance with multiple server.xml's and restart the testing instance you will also restart the production instance. Again if I am wrong please let me know. Hope this helps Chris On Thu, 14 Nov 2002, Josh G wrote: You don't need two installs, just two server.xml files. I do it to keep both development and test versions of a site which uses the root context but doesn't justify an apache install. -- To unsubscribe, e-mail: mailto:tomcat-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:tomcat-user-help;jakarta.apache.org -- To unsubscribe, e-mail: mailto:tomcat-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:tomcat-user-help;jakarta.apache.org
Re: When to use two tomcat instances
Thanks to all for sharing your insights and nice opinions! I read through running.txt. the original purpose of introducing catalina_base to help with multiple instances might be to meet the needs of different applications. I guess different confs, logs and webapps directories are required. If you need to test on different jdk versions, the catalina.bat/startup.bat would be getting different system values. Then you need two solid instances, i.e. two installations Does it make sense? chasee Christopher Moon [EMAIL PROTECTED] wrote:I use multiple Tomcat instances...one for production, testing, development and training. I have decided to get with multiple instances for testing and development it is nice to be able to test different versions of the JDK, which to the best of my knowledge you cannot set in the server.xml and it must be set via the $JAVA_HOME enviroment variable. Please let me know if this is incorrect because it would be great to not have to keep multiple instances. However, there is one other concern that made up go with multiple instances. Suppose, you make a change to the server configuration that requires you to restart the instance. If you are running one instance with multiple server.xml's and restart the testing instance you will also restart the production instance. Again if I am wrong please let me know. Hope this helps Chris On Thu, 14 Nov 2002, Josh G wrote: You don't need two installs, just two server.xml files. I do it to keep both development and test versions of a site which uses the root context but doesn't justify an apache install. -- To unsubscribe, e-mail: For additional commands, e-mail: - Do you Yahoo!? Yahoo! Web Hosting - Let the expert host your site
Re: When to use two tomcat instances
I'd be _very_ suprised if you could do this from an application level. You could probably do it in the OS tho, map port 8081 or some such to 8080 on eth1 or some such. I'm not a networking guy so I'm not sure how to go about it Look into IPTABLES and such i think that's where I'd start anyway ;-) -Josh -- And can you tell me doctor why I still can't get to sleep? And why the channel 7 chopper chills me to my feet? And what's this rash that comes and goes, can you tell me what it means? God help me, I was only 19 - Original Message - From: kathee [EMAIL PROTECTED] To: Tomcat Users List [EMAIL PROTECTED] Sent: Thursday, November 14, 2002 2:11 PM Subject: Re: When to use two tomcat instances Is there a way, using the server.xml files to tell the instances to listen on the same port, but on different NICs?? Kat On Wed, 2002-11-13 at 22:34, Josh G wrote: You don't need two installs, just two server.xml files. I do it to keep both development and test versions of a site which uses the root context but doesn't justify an apache install. -Josh -- kathee [EMAIL PROTECTED] -- To unsubscribe, e-mail: mailto:tomcat-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:tomcat-user-help;jakarta.apache.org -- To unsubscribe, e-mail: mailto:tomcat-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:tomcat-user-help;jakarta.apache.org
Re: When to use two tomcat instances
kathee wrote: Is there a way, using the server.xml files to tell the instances to listen on the same port, but on different NICs?? See the sections: http://jakarta.apache.org/tomcat/tomcat-3.3-doc/tomcat-ug.html#standard_contexts and http://jakarta.apache.org/tomcat/tomcat-3.3-doc/tomcat-ug.html#context_addcust :: for Virtual Host setup examples... Note: I haven't used this, since I front-end with Apache and let it handle multiple IP addresses, so I can't vouch for the accuracy! HTH, -- Hassan Schroeder - [EMAIL PROTECTED] Webtuitive Design === (+1) 408-938-0567 === http://webtuitive.com dream. code. -- To unsubscribe, e-mail: mailto:tomcat-user-unsubscribe;jakarta.apache.org For additional commands, e-mail: mailto:tomcat-user-help;jakarta.apache.org
