Re: Multiple MysQL servers with different IP address on same machine
An IP socket is the unique combination of an IP address and a port number. I don't see why you couldn't run those separate instances of your db servers on the same port but each with their own addresses as they would each have their own unique IP socket. I don't think you would create any collisions or contentions beyond that of pure network congestion. My tentative answer is: It should work fine but I have not tried it yet so I don't know from personal experience Shawn Green Database Administrator Unimin Corporation - Spruce Pine Sanjeev Sagar [EMAIL PROTECTED] wrote on 09/08/2004 05:04:38 PM: Hello All, MySQL : Standar Binary 4.0.20 O/S : Red Hat Linux release 9 (Shrike) Linux 2.4.20-31.9smp #1 SMP Tue Apr 13 17:40:10 EDT 2004 i686 i686 i386 GNU/Linux I already have setup of Three Multiple MySQL servers listening on different ports and sockets on same machine Option File: [mysqld1] server-id =1 port=3306 socket=/tmp/mysql.sock datadir=data1 [mysqld2] server-id=2 port=3307 socket=/tmp/mysql.sock2 datadir=data2 [mysqld3] server-id=3 port=3308 socket=/tmp/mysql.sock3 datadir=data3 All three servers started with no problem. Question is if I don't want to use different ports or scokets, can I use the different I.P. Addresses on same machine for three servers with same default port or socket. /etc/hosts file === 127.0.0.100 s1 127.0.0.101 s2 127.0.0.102 s3 Can I start three servers on same port (3306), same socket (/tmp/mysql.sock) on same machine by using above IP addresses? If yes then HOW? Can I use the replication in b/w them? keeping datadir and log-bin directory differtent is not a problem. Appreciate it.
Re: Multiple MysQL servers with different IP address on same machine
I need to add to my previous post -- You asked about using the SAME operating system socket as well as using separate addresses with the same port number (different IP sockets) My answer to that is NOT ON YOUR LIFE. Think of the chaos. If one client tried to connect to an OS socket that 3 different servers were listening to... Which one gets the connection? Which one validates the client? If for some reason the client *were* able to validate against all three servers at the same time, how could it sort out the 3 different responses to a query? NO each server must have it's own socket. It doesn't matter if we are discussing IP sockets or OS sockets the answer is still the same. Sorry for the previous oversight, Shawn Green Database Administrator Unimin Corporation - Spruce Pine Sanjeev Sagar [EMAIL PROTECTED] wrote on 09/08/2004 05:04:38 PM: Hello All, MySQL : Standar Binary 4.0.20 O/S : Red Hat Linux release 9 (Shrike) Linux 2.4.20-31.9smp #1 SMP Tue Apr 13 17:40:10 EDT 2004 i686 i686 i386 GNU/Linux I already have setup of Three Multiple MySQL servers listening on different ports and sockets on same machine Option File: [mysqld1] server-id =1 port=3306 socket=/tmp/mysql.sock datadir=data1 [mysqld2] server-id=2 port=3307 socket=/tmp/mysql.sock2 datadir=data2 [mysqld3] server-id=3 port=3308 socket=/tmp/mysql.sock3 datadir=data3 All three servers started with no problem. Question is if I don't want to use different ports or scokets, can I use the different I.P. Addresses on same machine for three servers with same default port or socket. /etc/hosts file === 127.0.0.100 s1 127.0.0.101 s2 127.0.0.102 s3 Can I start three servers on same port (3306), same socket (/tmp/mysql.sock) on same machine by using above IP addresses? If yes then HOW? Can I use the replication in b/w them? keeping datadir and log-bin directory differtent is not a problem. Appreciate it.
RE: Multiple MysQL servers with different IP address on same machine
Hi We have a machine with 2 IP addresses and mysql 3.23 on one and 4.10 on the other. Both using port 3306 One instance listens on localhost, which maps to 127.0.0.1, and also on one of the public IP addreses and the other listens to the other IP address. I use the IP address in the connection string and so far it works fine. I am in the process of setting up the server, and only have phpmyadmin installed (twice - one installation per mysql server) but that works correctly, so I expect everything else will. HTH Peter -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: 09 September 2004 14:53 To: Sanjeev Sagar Cc: [EMAIL PROTECTED]; Sanjeev Sagar Subject: Re: Multiple MysQL servers with different IP address on same machine I need to add to my previous post -- You asked about using the SAME operating system socket as well as using separate addresses with the same port number (different IP sockets) My answer to that is NOT ON YOUR LIFE. Think of the chaos. If one client tried to connect to an OS socket that 3 different servers were listening to... Which one gets the connection? Which one validates the client? If for some reason the client *were* able to validate against all three servers at the same time, how could it sort out the 3 different responses to a query? NO each server must have it's own socket. It doesn't matter if we are discussing IP sockets or OS sockets the answer is still the same. Sorry for the previous oversight, Shawn Green Database Administrator Unimin Corporation - Spruce Pine Sanjeev Sagar [EMAIL PROTECTED] wrote on 09/08/2004 05:04:38 PM: Hello All, MySQL : Standar Binary 4.0.20 O/S : Red Hat Linux release 9 (Shrike) Linux 2.4.20-31.9smp #1 SMP Tue Apr 13 17:40:10 EDT 2004 i686 i686 i386 GNU/Linux I already have setup of Three Multiple MySQL servers listening on different ports and sockets on same machine Option File: [mysqld1] server-id =1 port=3306 socket=/tmp/mysql.sock datadir=data1 [mysqld2] server-id=2 port=3307 socket=/tmp/mysql.sock2 datadir=data2 [mysqld3] server-id=3 port=3308 socket=/tmp/mysql.sock3 datadir=data3 All three servers started with no problem. Question is if I don't want to use different ports or scokets, can I use the different I.P. Addresses on same machine for three servers with same default port or socket. /etc/hosts file === 127.0.0.100 s1 127.0.0.101 s2 127.0.0.102 s3 Can I start three servers on same port (3306), same socket (/tmp/mysql.sock) on same machine by using above IP addresses? If yes then HOW? Can I use the replication in b/w them? keeping datadir and log-bin directory differtent is not a problem. Appreciate it. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
RE: Multiple MysQL servers with different IP address on same machine
Actually mysqld parameter bind-address work great for different IP addresses on same port for different servers on same machine. One can use -h hostname for clients connection to a specific MySQL database server. Thanks ! -Original Message- From: Peter Lovatt [mailto:[EMAIL PROTECTED] Sent: Thu 9/9/2004 9:51 AM To: [EMAIL PROTECTED]; Sanjeev Sagar Cc: [EMAIL PROTECTED]; Sanjeev Sagar Subject: RE: Multiple MysQL servers with different IP address on same machine Hi We have a machine with 2 IP addresses and mysql 3.23 on one and 4.10 on the other. Both using port 3306 One instance listens on localhost, which maps to 127.0.0.1, and also on one of the public IP addreses and the other listens to the other IP address. I use the IP address in the connection string and so far it works fine. I am in the process of setting up the server, and only have phpmyadmin installed (twice - one installation per mysql server) but that works correctly, so I expect everything else will. HTH Peter -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: 09 September 2004 14:53 To: Sanjeev Sagar Cc: [EMAIL PROTECTED]; Sanjeev Sagar Subject: Re: Multiple MysQL servers with different IP address on same machine I need to add to my previous post -- You asked about using the SAME operating system socket as well as using separate addresses with the same port number (different IP sockets) My answer to that is NOT ON YOUR LIFE. Think of the chaos. If one client tried to connect to an OS socket that 3 different servers were listening to... Which one gets the connection? Which one validates the client? If for some reason the client *were* able to validate against all three servers at the same time, how could it sort out the 3 different responses to a query? NO each server must have it's own socket. It doesn't matter if we are discussing IP sockets or OS sockets the answer is still the same. Sorry for the previous oversight, Shawn Green Database Administrator Unimin Corporation - Spruce Pine Sanjeev Sagar [EMAIL PROTECTED] wrote on 09/08/2004 05:04:38 PM: Hello All, MySQL : Standar Binary 4.0.20 O/S : Red Hat Linux release 9 (Shrike) Linux 2.4.20-31.9smp #1 SMP Tue Apr 13 17:40:10 EDT 2004 i686 i686 i386 GNU/Linux I already have setup of Three Multiple MySQL servers listening on different ports and sockets on same machine Option File: [mysqld1] server-id =1 port=3306 socket=/tmp/mysql.sock datadir=data1 [mysqld2] server-id=2 port=3307 socket=/tmp/mysql.sock2 datadir=data2 [mysqld3] server-id=3 port=3308 socket=/tmp/mysql.sock3 datadir=data3 All three servers started with no problem. Question is if I don't want to use different ports or scokets, can I use the different I.P. Addresses on same machine for three servers with same default port or socket. /etc/hosts file === 127.0.0.100 s1 127.0.0.101 s2 127.0.0.102 s3 Can I start three servers on same port (3306), same socket (/tmp/mysql.sock) on same machine by using above IP addresses? If yes then HOW? Can I use the replication in b/w them? keeping datadir and log-bin directory differtent is not a problem. Appreciate it.
Re: Multiple MysQL servers with different IP address on same machine
The example below renames a col. But can I rename a col. w/out giving all that type spec. at the end of the statement below. I just want to rename everything else stays the same. Thanks. mysql ALTER TABLE search CHANGE Description PageDescription VARCHAR(255) NOT NULL; -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
