Questions tagged [replication]
Replication is the process of sharing information so as to ensure consistency between redundant resources, such as software or hardware components, to improve reliability, fault-tolerance, or accessibility.
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Syncing multiple wordpress web servers in a farm
My company will shortly be setting up a blog, and I'm planning on setting up two web servers to host the wordpress website for redundancy. Normally when we do releases to a site in a farm we push to ...
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File replication on linux?
I would like to have 2 identicals web servers : one master and one slave.
File newly modified/create on the master should be replicated at once on the slave (in the minute).
I do not want to use ...
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Recommandation / best practise for site to site replication as cold standby with ESXi Cluster
I have two ESXI clusters at location A, each consisting of 2 ESXi servers. 1 cluster is in the DMZ and one cluster is in the LAN. Various virtual machines are running on them. In total, there are only ...
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Hyper-V Replication without Domain
I have a hyper-V host in a different DC that I want TWO source servers to replicate to.
I have followed guides such as https://michaelfirsov.wordpress.com/hyper-v-replica-in-windows-server-2016-...
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DRBD Not syncing between my nodes
Some version info:
Operating system is Ubuntu 11.10, on EC2, kernel is 3.0.0-16-virtual and the application info is:
Version: 8.3.11 (api:88)
GIT-hash: 0de839cee13a4160eed6037c4bddd066645e23c5 build ...
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ZFS: Handling massive no. of concurrent RW operations and failover
I have a single ZFS/Linux instance with a file that can grow to those crazy sizes supported by ZFS.
A large number of concurrent users need to read/write from/to this file over the public inter net. ...
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Large lag on mysql replication (Relay_Log_Pos and Exec_Master_Log_Pos does not increase)
Today my two slave's (one mysql 5.1 and second MariaDB 5.5, master is mysql 5.1) started lagging. Similar situation are quite often with lags rises to even 10000 seconds, because slaves have worse ...
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MariaDB Replication on selected columns
I would like to ask a question that I am sure someone who is a lot smart then me can answer.
I have a main MariaDB that holds all my tables and columns etc (total of 64 tables) and this is stored on ...
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How to stop/break replication between 2 domain controllers that are in same domain? [closed]
So I was attempting to break replication between 2 domain controllers by editing objects in AD, since I cant just go to powershell and stop it with command, but it was unsuccessfully. I have to stop ...
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Can I Ldap Sync replication to a different backend?
My current OpenLDAP backend is BDB can I replicate (syncrepl) this to another server using a MDB backend?
Probably a no but thought I'd ask.
Thanks,
Andy
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SQL 2008 R2 replication error: The process could not connect to Distributor
I have two servers running SQL 2008 R2 Standard, each with an instance named "MAIN". I have a small test database on my primary server (one table, 13 rows) that I want to replicate to a second server ...
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Get list of VMs NOT enabled for Replication using Powershell?
I want to monitor the Replication status of all VMs on our Hyper-V.
All our VMs are replicated. When a replication fails OR the VM is removed from replication, I want to know. I found the following ...
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how number of replicas is aligned with crush rule in a ceph cluster
I have some difficulties to understand whether the crush rule is aligned with the number of replicas. So, imagine I create a crush rule named replicate_in_2_racks as follows:
ceph osd crush rule ...
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openLDAP certificates untrusted or revoked
I've already spent two days on this problem but I can't find any solution.
Two openLDAP server run from docker on different hosts in master/master scenario. ldapsearch command or syncrepl process run ...
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Failover Cluster Disk Replication
We have a Windows failover cluster containing a shared disk assigned to a Role and want to set up replication from it.
We tried removing the disk from the cluster to use DFS Replication, however we ...
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1 Domain Controller(s) with replication in progress
I have 3 DCs (DC01, DC02 and DC03).
If I create a group policy on any DC I find it replicated to the others.
But I see an error in Group policy management, in domain status if I click “Detect Now” it ...
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Why would a domain controller encounter a USN rollback after an unclean shutdown?
I have this Windows Server 2008 R2 domain controller running on a physical Dell server, model PowerEdge R510.
There are some electrical problems around here, thus a black-out is, unfortunately, quite ...
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Storage Replica Configuration Failure (error code 0x8009030e)
I`m not able to establish a storage replica between 2 windows servers 2016.
#The script I used
$SR = @{
SourceComputerName = 'Server-1'
SourceRGName = 'RG-1'
SourceVolumeName = "A:"
...
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Snaphot sizes in ZFS and syncoid backups of them
I got a question about ZFS snapshotting:
So, as far as I understand, when I take a snaphot of a ZFS dataset, the snapshot will be initially 0 bytes in size, because at the moment of creation, there is ...
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MariaDB replication not auto reconnecting
I've got a simple master-slave replication setup amongst two MariaDB 5.5 servers.
The connection between the servers is somewhat flaky, causing disconnections every now and then.
However "...
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Sharepoint 2010 replication between multiple offices
Does Sharepoint 2010 address geo replication? My searches kept coming up with a third party solution but I'd rather stick to a built in option if it's available. I have multiple offices over 4.5 and ...
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How to Set Intra-site Replication Delay Time (Active Directory)
Cannot configure replication delay. I have 2 domain controllers (DC1 and DC2, Windows Server 2019), both in the same site. I set the replication delay time in the Server Manager snap-in "AD Sites ...
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Using MySQL/MariaDB replication, how to know when the Replica is in a consistent state?
This is a question about MariaDB (mostly) and a replication that I am considering.
For this replication, the Primary database is updated every minute by a process which can take about 15 seconds to ...
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Is it possible to have MySQL/MariaDB bidirectional replication?
I am trying to install replication on several MariaDB servers.
With no experience at all on this.
I am wondering something.
Would it be possible to have both servers acting simultaneously as master ...
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Howto: Block or File replication across 3+ nodes without a SAN
The setup
I admin the backend for a website that currently exists on a single node using Nginx (webserver), Neo4J (database) and Wildfly (app server). The website is getting enough traffic that we ...
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How to know if an S3 bucket with Cross-Region Replication is fully replicated?
I want to setup my S3 bucket to replicate in another region. Once it's fully replicated, I will make that bucket the main one (the idea is to migrate all data from one region to another). I know how ...
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How to know if an AWS RDS instance is fully replicated?
I setup a replica in a different region for my RDS instance. It seems to be working except that the status is always "Replicating". How can I know that the instances are fully in sync? ...
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PostgreSQL 9: Does Vacuuming a table on the primary replicate on the mirror?
Running PostgreSQL 9.0.1, with streaming replication keeping one read-only mirror instance up to date. Auto-vaccuum is on on the primary, except for a few tables which are not vacuumed by the auto-...
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How to fix MARS (Multiversion Asynchronous Replicated Storage) timeout when viewing status?
I'm running MARS (Multiversion Asynchronous Replicated Storage) between 2 remote locations, and for the most part it is running acceptably for my needs.
As part of monitoring I periodically issue a ...
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How Object-GUID replicated
since Object-GUID is a non replicated attribute, then how All DCs have same object-GUID for an object?
how object-GUID is replicated to all DC
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How to add a new database on replication?
I have a mysql replication with two servers.
There are actually 3 databases on it.
On master :
server-id = 1
log_bin = /var/log/mysql/mysql-bin.log
expire_logs_days ...
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How should I automate replication of a production MySQL db onto a read/write dev server for testing while also scrubbing the data first?
I know there are lots of variables here, and they're highly dependent upon the applications in the environment as well as the needs of the org. I read this post first, as the question was similar.
[...
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Active Directory Replication Issue
I have 2 DCs in my lab environment. So I just wanted to check the replication status using repadmin /replsummary but it throwed me an error : 1722 The RPC server is unavailable. I forced replication ...
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Monitoring of MySQL replication and alerting when replication is not working
I have a question about monitoring of MySQL replication and in particular about alerting using Grafana/Prometheus.
We have 2 MySQL(MariaDB to be exact) instances for which replication is configured: ...
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In terms of replication, can an OpenLDAP consumer act as a provider to another OpenLDAP server?
If I have an OpenLDAP server configured as a replication provider and a second OpenLDAP server configured as a consumer, can I configure the second server to act as a provider for a third OpenLDAP ...
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Why it asks me to input password here to restart db
I just have done
pg_basebackup -h primary_host -p primary_port -D PGDATA -U replication user
and I jsut wanted to restart the db, so I did
sudo su - postgres
sudo service postgres restart
and the ...
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kubernetes - Running dovecot with serveral replicas
I am in the process of setting up an email server through kubernetes. I managed to get postfix up and running and now am trying to setup dovecot. As I am expecting a bit of traffic for dovecot I want ...
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PAM deems Kerberos password as expired
I run Kerberos / LDAP authentication in a small network for years. Kerberos is held in LDAP, which in turn is replicated to another site. Machines at the second site authenticate to the replica, the ...
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Mongo secondaries stuck at startup state
I have a MongoDB replica set with secondaries that won't make it past the STARTUP state. The database is large but they should have moved to STARTUP2 by now. The correct ports are open as I can ...
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How do I get alerted when SQL Server 2008 replication fails for any reason?
We have managed to get SQL Server 2008 merge replication working. However, it will occasionally fail for inexplicable reasons (currently, it's because of MSSQL_REPL-2147201021.) When this happens, ...
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How to send a single parent ZFS filesystem snapshot and all its descendents' same snapshot to a new pool?
If we zfs snapshot -r tank@20220129, all sub-filesystems also get that snapshot.
How to send that single snapshot of tank with all sub-fs's to a new pool (no historical base of snapshots)?
While zfs ...
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MariaDB Master-Master replication with 3 servers, no ports open on master
I want three MariaDB database servers, one master and two "slaves". I want to be able to read and write on every server, and have this replicated on the other servers. I read on the internet ...
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mongodb keep looping while trying to sync data
I'm converting my my standalone mongodb into a replica set. I've added one more member (and I want to add two more members later, and to shutdown the primary server).
My primary mongodb is running 2....
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LDAP Replica with TLS
I'm having trouble to run the replica LDAP with TLS, without TLS, all works !!
Provider and Consumer are identical
CentOS release 6.5
rpm -qa | grep ldap
openldap-clients-2.4.23-34.el6_5.1.x86_64
...
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Upon running repadmin /replsummary more than 15 servers are showing "8606" error
We are having an issue with Error ID "8606" ( Insufficient attributes were given to create an object. This object may not exist because it may have been deleted and already garbage collected)...
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glusterfs mounts get unmounted when 1 of the 2 bricks goes offline
I have an odd case where 1 of the 2 replicated glusterfs bricks will go offline and take all of the client mounts down with it. As I understand it, this should not be happening. It should fail over ...
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MariaDB replication lagging up to a dozen times a day for no obvious reasons
We first set up MariaDB replication using less powerful servers but considering our increased database load we had to rent more powerful servers and that's when the troubles began.
Right now the ...
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AWS RDS Postgres cross-account replication
Is it possible to set up cross-account replication with the AWS RDS Postgres database? The goal is to have a read-only replica in a separate AWS account.
I know it's somewhat possible to accomplish ...
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Invalid method Parameter when calling DfsrConnectionInfo->ForceReplication() with WMIC
In our AD infrastructure the SYSVOL is replicated by DFSR. I want to force replication using WMI (ForceReplication method) via WMIC:
wmic /namespace:\\root\microsoftdfs path DfsrConnectionInfo call ...
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Hyper V Dedicated Network Traffic for Hyper V Replication between two Hyper V Server
our scenario
The scenario is applied exactly with our planning setting, we need to configure Replica on our VM inside Hyper-V, the issue is how to configure or dedicate a specific network for a ...
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