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0
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0answers
26 views

Server's Main IP Address Goes Down

We've got 9 SolusVM slaves working under 1 master node. Our nodes are going down time to time. When we login OpenVZ nodes and check vzlist -a, all VPSs are up and running. BUT, main IP Address is ...
0
votes
1answer
64 views

ERROR 1130 (HY000): Host 'host' is not allowed to connect to this MySQL server, only on slave

So I have a master and a slave in a mysql cluster, the syntonization works as it should however I am not able to connect to the slave from any host except from the server it self. I have no problems ...
-2
votes
1answer
39 views

Restart periodically two linux server with master slave dependency

My system is configured as follows: database server on a linux server web application on another linux server For sanitation purposes I would like to restart these servers during night at least ...
2
votes
1answer
41 views

Performance-wise, is a DNS Slave better to have than two duplicate Masters?

I have two bind9 servers that are not setup with duplicate settings and know nothing about each other. Our CPU usage is sitting around 7% - 10%: mostly bind, which I believe is perfectly in range for ...
1
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1answer
24 views

How to configure an additional BIND instance for a domain already described by other public name servers?

Background I have a small virtual server hosted by my provider and there I have configured a relatively simple combination of postfix, dovecot and roundcubemail (backed by nginx) that works OK. I ...
0
votes
1answer
20 views

Configuring different read and write targets for OpenLDAP

I have a new piece of infrastructure (a simple LDAP web service) that will be a drop-in replacement for something that currently exists in production. The backend OpenLDAP server will not be upgraded ...
2
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0answers
81 views

Howto do VCSA redundancy?

We are currently in the process of setting up a new VMWare environment which is now only in lab phase. We are studying the possibility to have a vCenter cluster with an active and a ...
3
votes
0answers
474 views

Pacemaker DRBD resource not getting promoted to master on any node

First off, I'm no linux specialist, I've been following tutorials and been working with the help of google, this worked out fine until now, but currently I'm stuck with a problem. I'm using CentOS 6.5 ...
0
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0answers
321 views

RockMongo Connection Issue with MongoDB Slave

I have a MongoDB Replication with Master-Slave (not RepliSet) I have configured RockMongo on two servers. But I able to login to master server through rockmongo but when I login to slave with rock ...
1
vote
0answers
519 views

ISPConfig multi-server DNS setup

I have 2 servers with ISPConfig 3 installed. Both servers are used to all services (hosting, db, mail, dns etc). One of the servers is also configured to be ns1.mydomain.com and the secondary is ...
0
votes
2answers
117 views

MySQL - Does the change in MySQL master db password affect on slave db?

I want to change the MySQL DB password on the master db. My question is: do we have to care for the slave DB when changing the master database password?
4
votes
0answers
976 views

Nameserver: Slave can't transfer zones from master [closed]

My slave can't transfer the zones from the master. My configuration: Master server: Ubuntu 12.04 with Plesk 11.5. Plesk uses Bind 9 as nameserver. Slave server: Ubuntu 12.04, Bind 9. To tell the ...
0
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2answers
539 views

BIND Slave Receiving Notify From Other Slave?

I have a master nameserver setup with a few slaves as well. Today I was changing one of the slaves to a new server when I came accross a weird error message. After updating the DNS records on the ...
0
votes
1answer
325 views

Bind9 Master Slave replication

I have Bind9 on Debian for NS1 and NS2 They are two virtual machines. I create a file /etc/bind/zones/db.domain.com Then I have to add this to the /etc/bind/named.conf.local zone "domain.com" { ...
-2
votes
2answers
215 views

Is it possible to do mysql replication with one server in internet and another in a intranet?

I have a server in internet that must have all data synced (dont need to be in realtime) from a server from a intranet (obviously has internet connection). Is it possible? How about sync both sides, ...
2
votes
1answer
190 views

I really want a wildcard NS record in BIND. Is there a workaround? [duplicate]

We have a public DNS provider, a private DNS master, and a private DNS slave. The public DNS provides the "example.com" zone, and all of it's subdomains. Our private DNS also provides the ...
7
votes
1answer
2k views

Mysql Slave stuck in “System lock”

My MySQL slave is spending a lot of time in Slave_SQL_Running_State: System lock. I can see that the system is currently I/O write bound, and that it is processing the log, although slowly. Show ...
0
votes
1answer
159 views

DNS Slave doesnot serve new record while master is down until restart

could anyone explain the behaviour of DNS slave. i am testing dns server, for internal purpose, and after configuring master slave everything works fine, but i am willing to understand the mechanism ...
4
votes
2answers
486 views

How to change the master in a MongoDB cluster without restarting the process?

Reading the documentation of MongoDB about how to configure a master-slave configuration of a cluster (our cluster will have more than 12 nodes, so unfortunately we can't have a replica-set ...
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1answer
172 views

understand BIND9, DNS Master and Slave Zones [closed]

edit: (for clarification) I have two servers. Server 1 has a static IP, and server2 has a dynamic hostname using DDNS services. both servers are running Ubuntu 12.04 lts, and virtualmin. on server ...
5
votes
2answers
4k views

BIND slave doesn't sync up with master until it is restarted

I have two DNS servers running BIND9, one master and one slave. When the zone file is updated on the master, I want the slave server to immediately start serving the changed record(s), but BIND is ...
1
vote
1answer
713 views

mySQL: Slave not able to connect to Master for replication

On my master, I did: GRANT REPLICATION SLAVE ON *.* TO 'repluser'@'%' IDENTIFIED BY 'mypassword'; On my slave, I see: mysql> show slave status \G; *************************** 1. row ...
1
vote
1answer
95 views

Percona xtradb cluster with asynch slaves

I have a Percona xtradb cluster set up with 3 nodes. Node 1 is also set up as a master with an asynchronous slave. When I make an update to Node 1, it is replicated to the cluster as well as the ...
0
votes
1answer
101 views

Replicate from slaves to master and viceversa

I've a great dilema here and didn't know how to solve it. I need to replicate a few tables from MySQL DB (slaves) to MySQL DB (master). Take as an example this: MySQL DB (master) table1 table2 ...
3
votes
1answer
956 views

Configure fallback redis server

I am using redis as a cache server. Can I somehow configure multiple redis servers, that the cache is fully functional (read/write) even if some of them go offline? I looked into master->slave, but ...
1
vote
2answers
359 views

Overwrite SOA expiry in a bind9 slave name server.

I run a slave name server of a domain that I do not have full control over (i.e. changing the SOA is not possibly). The SOA specifies an expiry time of one week. For various reasons, I’d like to ...
0
votes
1answer
188 views

Moving Redis persistence to a slave

Redis' background AOF rewrites are killing performance of our service. The general consensus is to move AOF persistence to a slave in a separate VM and disable it on master. There is a problem with ...
2
votes
1answer
1k views

BIND no longer responds to AXFR Requests

Recently we moved our primary external DNS server. It has three caching DNS slaves in front of it provided by our ISP. They've told us they've started getting access denied requests when doing zone ...
6
votes
2answers
2k views

Magento hosting on a budget

I have to do a setup for Magento. My constraint is primarily ease of setup and fault tolerance/fail over. Furthermore costs are an issue. I have three identical physical servers to get the job done. ...
1
vote
2answers
914 views

Ulimit settings in Oracle 11g on Linux 5

Is there an issue with "Ulimit -Hn" being set too low (at 1024) when (Oracle recommend 65536)? This is for Oracle 64-bit 11g on Linux 5. It is one of the settings that appears to be woefully short ...
3
votes
1answer
408 views

Using Amazon RDS (or similar) as a slave

Officially, RDS instances can't be directly set up to slave non-RDS databases. My production master is MySQL running on Hetzner and I want an RDS instance to closely follow it for backup purposes, ...
0
votes
3answers
447 views

Design a DNS Master/Slave with SVN

I am looking for a good design of a master, slave DNS servers with SVN. Few doubts bothering me are: Would it be good if I have a post-commit hook to replicate/rsync the DNS master data to the ...
3
votes
1answer
472 views

MongoDB -what's the safest and most efficient way to change from Master-Slave to ReplicaSet?

I now have two mongo servers with a Master-Slave configuration (all read-writes are done with the Master, the Slave is just a cold backup) serving a pretty demanding web app. I want to switch to ...
1
vote
1answer
299 views

MongoDB ReplicaSet Elections when some nodes are down

I'm trying to get into ReplicaSet concept, and found something weird in mongoDB Documentation: For a node to be elected primary, it must receive a majority of votes. This is a majority of all ...
5
votes
1answer
3k views

BIND, Master, Slaves and Notify

It might seem like a very basic question, but, how is a master DNS server aware of its slaves? I mean, does it parse the zone file and determine where to send the NOTIFY message? And if that is the ...
2
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2answers
2k views

--log-slave-updates is OFF but some updates are still logged to the slave binary log?

MySQL version 5.5.14 According to the document, by the default, slave does not log to its binary log any updates that are received from a master server. Here are my config. on the slave: # egrep ...
2
votes
1answer
1k views

pgpool2+streaming replication failover on only 2 servers?

I am trying to configure pgpool2 and postgresql 9.1 to handle failover. I currently have streaming replication running, and are using pgpool2 for read-only load balancing. I have 2 servers in my ...
1
vote
1answer
79 views

Backups from MySQL slave server — Good idea or bad?

I'm have one MySQL master and two MySQL slaves set up to replicate. I'm running my database backup process, consisting of an Xtrabakup (via the perl wrapper Innobackupex) backup and an atomic ...
3
votes
2answers
946 views

How to slave real-time data from two MySQL sources merging in to one MySQL destination?

I have two different MySQL instances that I would like to 'slave' to a third instance. (so I can do easy joins on the third instance) eg. mysql1> show databases db1 db2 mysql2> show databases ...
0
votes
1answer
235 views

Can I turn eNom in to a slave, or somehow work side by side?

I ran out of space at eNom, and can add no more sub domains. Now I'am setting up bind9 on my server and was wondering, can I turn eNom in to a slave. I would have preferred running my dns server as ...
1
vote
1answer
212 views

making slave server as master for another server

I have three servers, Server X, Y, and Z. I have the main mysql DB on X (innodb DB). now I have created Master-Slave from X to Y. everything is working fine here. and now i set Y as a master for Z. ...
1
vote
3answers
552 views

Can DNS do failover switch for a domain?

I have heard about round robin solution. But that one is making different request to different ips to do load balancing. What I want is making one IP as master, only if it dies, the DNS server switch ...
0
votes
2answers
95 views

MySQL Master Slave Replication Not Working

I setup MySQL master slave replication, but none of the databases, tables, and data is being copied over to the slave from the master. Here is the relevant configuration on the master: server-id=1 ...
1
vote
1answer
337 views

mysql replication - slave seems up to date but data not synchronized

I have a master-slave setup with 2 servers over a network. Due to an error, the slave IO thread stopped, though I could get it started and running, the slave is way behind the master. Also, SHOW SLAVE ...
3
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2answers
498 views

Online Schema Change Strategies for Large MySQL Tables

I'm curious to hear strategies and methods people use for performing alters on very large tables in MySQL. Large could be any number of rows or size that would be impacting to alter. For the sake of ...
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3answers
8k views

Bind zone transfer refused

UPDATE: BIND Version: [root@10.224.45.130] $ named -v BIND 9.3.6-P1-RedHat-9.3.6-16.P1.el5 Operating System: CentOS release 5.6 (Final) After running [root@10.224.45.131] $ dig @10.224.45.130 ...
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3answers
708 views

MySQL slave reporting incorrect values for Seconds_Behind_Master

I have a MySQL slave that when it is 0 seconds behind the master, it correctly reports 0 Seconds_Behind_Master. However, if it gets even 1 seconds behind, it reports 14401 Seconds_Behind_Master (which ...
4
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2answers
3k views

MySQL slave replication reset with no Master Downtime (using MyISAM)

Root of the issue: In all instructions for creating a slave on a running master requires flush tables with read lock. We use MyISAM, so we can't just use --single transaction to get consistent table ...
0
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2answers
207 views

I can't enable binlog in MySQL

I am trying to enable binary log in order to create master slave for my DB. MySQL version is 5.1.41-3ubuntu12.10-log I have added this to my.cnf log_bin = /var/log/mysql/mysql-bin.log ...
1
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1answer
200 views

Erratic Seconds_Behind_Master

One of my MySQL slaves will at one moment, report 57 seconds behind master, and the next will show 0. I am also monitoring with mk-heartbeat which shows an average of less than 1 second. MySQL and ...