Hi,

I have set up the replication. I have also confirmed that is works fine. The maxadmin also displays that there are two servers. But, Master ID = -1. Here's the output from maxadmin

"show servers"
Server 0x39c3520 (srv1)
    Server:                       localhost
    Status:                       Running
    Protocol:                     MySQLBackend
    Port:                           3306
    Server Version:            5.5.41-MariaDB-1ubuntu0.14.04.1
    Node Id:                      0
    Master Id:                    -1
    Slave Ids:           
    Repl Depth:                  -1
    Number of connections: 0
    Current no. of conns:     0
    Current no. of operations:0
Server 0x39c3410 (srv2)
    Server:                        localhost
    Status:                        Running
    Protocol:                     MySQLBackend
    Port:                           3307
    Server Version:            5.5.41-MariaDB-1ubuntu0.14.04.1
    Node Id:                      0
    Master Id:                    -1
    Slave Ids:           
    Repl Depth:                  -1
    Number of connections:0
    Current no. of conns:    0
    Current no. of operations:0

"show monitors"
    Name:        MariaDB10 Monitor
    Monitor running
    Sampling interval:        10000 milliseconds
    MaxScale MonitorId:    77358052
    Replication lag:            disabled
    Detect Stale Master:    disabled
    Connect Timeout:        3 seconds
    Read Timeout:             1 seconds
    Write Timeout:             2 seconds
    Monitored servers:        localhost:3306, localhost:3307

I will try to set this up from the beginning again, let's see if I have any luck this time.

Thanks,

Sriram

On Tue, Mar 10, 2015 at 2:05 AM, Markus Mäkelä <markus.makela@mariadb.com> wrote:

Hi,

Is the cluster set with replication? The readwritesplit needs at least one master and one slave to work. Using the maxadmin interface should verify this. The client binary can be found in the same folder as the maxscale binary. Default user name is admin and the password is skysql.

Markus

On Mar 9, 2015 10:29 PM, "sriram patil" <spsrirampatil@gmail.com> wrote:

Hi Markus,

I got an error. It says "Error : No Master can be determined".

Here's how my config file looks like

[maxscale]
threads=1
log_trace=1

[srv1]
type=server
address=localhost
port=3306
protocol=MySQLBackend

[srv2]
type=server
address=localhost
port=3307
protocol=MySQLBackend

[MariaDB10 Monitor]
type=monitor
module=mysqlmon
servers=srv1,srv2
user=maxmon
passwd=maxpwd

[RW Split Router]
type=service
router=readwritesplit
servers=srv1,srv2
user=maxuser
passwd=maxpwd

[RW Split Listener]
type=listener
service=RW Split Router
protocol=MySQLClient
port=4006

[CLI]
type=service
router=cli

[CLI listener]
type=listener
service=CLI
protocol=maxscaled
address=localhost
port=6603

I have granted all privileges to "maxmon". Does it help in pin pointing the error?

Thanks,

Sriram

On Tue, Mar 10, 2015 at 1:22 AM, Markus Mäkelä <markus.makela@mariadb.com> wrote:

Hi,

The first step would be to inspect the state the servers are in. The
easiest way to do is to use the maxadmin interface. To enable this,
configure the following into MaxScale's config file

        [CLI]
        type=service
        router=cli

        [CLI Listener]
        type=listener
        service=CLI
        protocol=maxscaled
        port=6603

Executing the 'show servers' should give you a list of the servers and
their states. If this doesn't give any clues the next step would be to
enable MaxScale's tracelog. The log can be enabled by adding
'log_trace=1' under the [maxscale] section. Here you can see the routing
logic of the router and the reasons why the queries are routed to the
master.

Markus

On Tue, 2015-03-10 at 00:57 +0530, sriram patil wrote:
> Hi All,
>
>
> I tried running 2 MariaDB servers and MaxScale on my laptop. I gave
> different configurations to both MariaDB servers with separate data
> and log directories. Referred this for it.
>
>
> Also have set up MaxScale from "MaxScale for rest of us" series on
> MariaDB blog.
> 1. https://mariadb.com/blog/maxscale-rest-us-part-1
> 2. https://mariadb.com/blog/maxscale-rest-us-part-2
> 3. https://mariadb.com/blog/maxscale-rest-us-part-3
> 4. https://mariadb.com/blog/maxscale-rest-us-part-4
>
>
> So, i tried to set up the readwritesplit router with 1 master and 1
> slave. Here, the replication mechanism worked fine but the queries are
> always executed on the master server.
>
>
> Example output for a read query:
>
> mysql -h localhost -u maxuser -p test -e "select c1, @@server_id from
> t1"
>
> Enter password:
> +------+-------------+
> | c1   | @@server_id |
> +------+-------------+
> |    1 |           1 |
> +------+-------------+
>
>
> server_id for master is 1 whereas for slave it is 11, which is never
> displayed in the output.
>
>
> Can someone help me with this? Should I try the same config with one
> more slave? Are there any better resources for setting up MaxScale?
>
>
> Thanks,
>
> Sriram
>
>
>
>

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--
Markus Mäkelä, Software Engineer
MariaDB Corporation
t: +358 40 7740484 | Skype: markus.j.makela