2
votes
0answers
25 views

Multiple httpd with JBoss cluster: provide httpd HA

I have a working configuration like this: +-----+ +-----+ +-----+ +-----+ | i1 | | i2 | | i3 | ... | in | JBoss Cluster +--+--+ +--+--+ +--+--+ +--+--+ | ...
1
vote
0answers
22 views

Difference between all servers in one cluster and more than one cluster with servers? [closed]

Not sure I understand what´s the difference or how it works when servers a running in one cluster or if there are more than one clusters with servers in it - regard High availability & Load ...
0
votes
0answers
50 views

Number of public ips for wackamole

I am trying to configure a highly available cluster consisting of three boxes with public ips. How many public IP addresses will I require for this? Can I configure spread on a private NIC and manage ...
1
vote
0answers
115 views

How to configure cluster.conf for failover routing two networks?

I'm routing between an "external" subnet with Internet connectivity and two "internal" subnets, using iptables forwarding on a Linux box running CentOS 6.4: I'd like to now duplicate this router ...
0
votes
0answers
81 views

Timeout on heartbeat STONITH (IPMI fencing)

I am managing a two node heartbeat DRBD+MySQL+FreeRADIUS cluster. I am currently using external/ipmi fencing as my STONITH solution. However, I am running into a problem where the primary node has a ...
3
votes
2answers
51 views

Is it possible to have automatic failover of a windows service without windows clustering?

Due to a partial failure of our SAN we have switched our message queuing (Active MQ) from using network storage to using local storage. Because the secondary server is no longer sharing the same ...
0
votes
1answer
109 views

Memcached distribution

I have a question about memcached distribution across nodes. We have 20 memcached nodes with 200GB memcached on each. Our apps are PHP apps. $memcache->setOption(Memcached::OPT_DISTRIBUTION, ...
0
votes
1answer
74 views

Red-Hat Cluster doesnt migrate services on node shutdown

I have a RHCS with two nodes and manual fencing. when I restart Node 1 (the primary) it migrates both services to Node 2 automatically. but when I shutdown Node 1, it doesnt happen and I need to use ...
1
vote
0answers
124 views

Unable to remote desktop using failover cluster name

I am using Microsoft Failover Cluster and I have 2 nodes - say node1 & node2. The nodes are successfully accessed by remote desktop. but the cluster name is not accessible. The cluster name is ...
1
vote
1answer
172 views

Advantage of Microsoft Cluster over Microsoft Network Load Balancer

Till recently, I assumed that Microsoft NLB worked at an OS/Machine level rather than an Application Level. i.e. the NLB just monitors heartbeats on the machine to check if machine is alive and then ...
-3
votes
1answer
66 views

Highavailability/Global Loadbalancing of clusters [closed]

I know this website 1channel.ch which has like 4 servers in 4 different datacenters across the globe (czech republic, estonia, sweden, germany). What happens is as i am browsing this website the ...
0
votes
1answer
134 views

HA Options for Windows Servers

We are looking at different options to allow us to stay up and running when our primary datacenter (DC1) goes down for any reason. What is the main difference in having a offsite server updated all ...
2
votes
1answer
504 views

Microsoft fail over cluster and storage with raid card

I am looking for some input on a Microsoft fail over cluster implementation on 2012. To use the storage and pools it apparently has to have JBODS if your using a raid card. But the LSI card we use ...
5
votes
1answer
2k views

mount.ocfs2: Transport endpoint is not connected while mounting…?

I have replaced a dead node that was running in dual-primary mode with OCFS2. All the steps work: /proc/drbd version: 8.3.13 (api:88/proto:86-96) GIT-hash: 83ca112086600faacab2f157bc5a9324f7bd7f77 ...
-1
votes
1answer
100 views

Relying on shared disks for heartbeat

I read somewhere that using shared disks for heartbeats is reliable even if network totally fails. I read it in the context of remedy from split-brain. Is this correct? But I can not understand this. ...
2
votes
2answers
73 views

Suggestions on providing HA access to an external (fibre) RAID subsystem

We are looking at upgrading our storage capacity with an external RAID subsystem that has redundant (2) fibre controllers, each controller has 4 x 8 Gbps fibre ports. I would like to make access to ...
2
votes
2answers
273 views

Clustered file systems as XenServer storage

I want to use shared storage for a XenServer environment with 4 host servers which are running various VMs under XenServer. Planning to use 2 extra servers as storage with high availability of some ...
1
vote
1answer
2k views

How to setup a simple Ubuntu Server Tomcat cluster on VirtualBox for testing? [closed]

I am looking for the step by step instructions to setup at least two simple Ubuntu Virtual Core 12.10 Server VMs on Oracle VirtualBox under Windows 7 64bit. The test setup would be: Apache HTTP ...
2
votes
2answers
973 views

Windows Server 2012: Possible to have High Availability and reliability without needing a SAN, but connecting servers together?

I have some questions below -- tried to word them the best I could. If you downvote my post, please make a comment explaining why you downvoted so that I can try to do better when I post in the ...
4
votes
1answer
155 views

How does a SQL Server Availability Group decide on which secondary will become the new primary when an automatic failover is triggered?

How does a SQL Server Availability Group with multiple synchronous-commit secondary replicas decide on which secondary replica will become the new primary when an automatic failover is triggered? ...
2
votes
2answers
2k views

Alternative to GlusterFS [closed]

I need to create a redunant 2-linux machines configuration so that the files on server1:/dir are in sync with the files on server2:/dir I managed to configure GlusterFs to do this but while it works ...
1
vote
2answers
194 views

Server Clustering on differen OS : CentOs and Debian [closed]

I have two dedicated servers in two different locations. One at USA (Based on CentOS), another at Asia (Based on Debian). Need to implement High Availability HTTP Clustering. The main complexity is ...
1
vote
1answer
239 views

SBD killing both cluster nodes when there are even small SAN network problems

I am having problems with stonith SBD in a openais-based cluster. Some background: The active/passive cluster has two nodes, node1 and node2. They are configured to provide an NFS service to users. ...
2
votes
3answers
186 views

Storage cluster for inexperienced admin

I'm a relatively inexperienced server admin who primarily works with Windows and a little bit of Linux. I'm the only admin of a small organization. I'm looking for a way to have a high-availability ...
0
votes
2answers
72 views

Server 2008 Failover

How do I ensure high availability of data on two physical servers in the event one were to fail? I have two Dell T710s, both with Windows Server 2008 R2 Standard. My highest priority is to make sure ...
1
vote
0answers
67 views

Service fails to start when failover kicks in

I created a Windows Service which hosts a WCF application looking at/binding to the Clustered MSMQ The Windows service was first installed on both nodes of the cluster. I then created a cluster of ...
1
vote
1answer
250 views

Percona XtraDB Cluster with GlusterFS

We are deploying a GlusterFS cluster with 4 nodes, and we want to deploy the Percona XtraDB Cluster on top of it with 4 nodes, each node will have a mounted folder from the GlusterFS, each mount will ...
2
votes
5answers
862 views

How to make AD highly available for applications that use it as an LDAP service

Our situation We currently have many web applications that use LDAP for authentication. For this, we point the web application to one of our AD domain controllers using the LDAPS port (636). When we ...
3
votes
2answers
7k views

How to setup STONITH in a 2-node active/passive linux HA pacemaker cluster?

I am trying to setup an active/passive (2 nodes) Linux-HA cluster with corosync and pacemaker to hold a PostgreSQL-Database up and running. It works via DRBD and a service-ip. If node1 fails, node2 ...
2
votes
1answer
396 views

Ganeti and automatic failover

I'm building a simple 2-node cluster with Ganeti+DRBD... What is the recommended way to setup automatic failover? I'm used to Heartbeat, but they say it should be avoided with my setup.
1
vote
1answer
611 views

Best RAID setup for DRBD

I would like to setup a two nodes PROXMOX cluster with DRBD storage. The nodes will be connected by gigabit ethernet. What would be the best storage setup in terms of reliability, performance and ...
5
votes
4answers
3k views

Ganeti vs Proxmox [closed]

I'm system administrator in small software house. I'm going to virtualise our servers. The main reason for doing this is providing highest possible uptime, but probably it will also increase resources ...
0
votes
1answer
216 views

Network GURUs - IP failover combined with load-balancing… Is there such software? Is it possible?

I've been playing around with high-availability solutions for a few days and so far I find UCARP very useful for IP fail-overing. It's dead simple and does the job. I was thinking about taking it a ...
1
vote
1answer
191 views

xen cluster multiple nodes

I'm looking for information on how to build a Xen HA cluster with multiple nodes. I find lots of information on how to build clusters with two nodes, but that is really not enough. I've built one with ...
0
votes
2answers
683 views

loadBalancing/clustering on IIS/ASP.Net/SQL Server

I've to create an offer for a future ASP.NET application. They wants an high availability(99.9%+). So I'm searching the best solutions with .Net technologies(asp.net mvc 3, IIS 7, SQL Server 2008 R2) ...
0
votes
2answers
435 views

How can I make a high available tomcat cluster with no single point of failure?

I've surfed the web and tried to find a way in order to make a tomcat cluster with no single point of failure , and all what I have found is that I need something called dispatcher which will be ...
0
votes
1answer
482 views

Tomcat web application high availability

I have setup apache-tomcat clustering(Ubuntu Servers) and I used tomcat supported clustering technique with mod_jk following the link which is clear and easy to follow. I did this in my LAN with ...
0
votes
2answers
73 views

Checking if server is alive and taking action if it isn't [duplicate]

Possible Duplicate: What tool do you use to monitor your servers? I am looking for a monitoring solution for a server farm. It should resolve following issues: Detect if the host has ...
14
votes
7answers
2k views

When is the right time to introduce high availability for web site?

When is the right time to introduce high availability for web site? There are many articles on High Availability options. It’s not that obvious however WHEN is the right time to switch from single ...
0
votes
1answer
545 views

after split brain recovery filesystem not mounted

I have an active/passive high availability cluster with pacemaker+split brain. After split brain condition I use automatic split-brain recovery to recover my systems. The problem is that since file ...
1
vote
1answer
122 views

Predict the number of primaries after a split-brain situation

I am trying to avoid a split brain situation using automatic split brain recovery policies explained at http://www.drbd.org/users-guide/s-configure-split-brain-behavior.html How to predict which ...
2
votes
1answer
2k views

relation between heartbeat,openais,corosync

i am planning for high availability on lucid ubuntu, i started with drbd after a simple configuration on drbd I went to heartbeat and had a simple config on it too. on drbd official site a document ...
1
vote
1answer
185 views

Addressing SQL 2008 mirror cluster

Hallo SQL jedis, I want my database to be always available. So I've set up database mirroring, which is working peachy. My question though, is how can I consistently address the database? I want ...
0
votes
3answers
329 views

Can I have a list of software to run a two nodes HA Ubuntu (server) cluster?

This is only for experimental purpose :-) I want to learn how to create a High-Availability Ubuntu (server) cluster. What are the basic software requirements? I heard about Beowoulf, heartbeat and ...
1
vote
2answers
296 views

How do cluster file systems avoid race conditions?

How do cluster file systems avoid the myriad of possible race conditions? I'm trying to get a grip on using a cluster file system in a Master-Master architecture. I'm thinking specifically about ...
2
votes
3answers
260 views

Firewall that supports HighAvailability and Spanning Tree

I'm looking for a firewall appliance that supports high availability and spanning tree. I have two ha-cluster nodes and I'd like to protect them with a firewall. To avoid a single point of failure, ...
0
votes
2answers
55 views

mysql redundancy with mixed storage types

Looking at building redundancy into our system, as we are currently, um, exposed should anything blow up. We have a large-ish DB (150G), consisting of a mix of innoDB and myISAM table types. We want ...
2
votes
3answers
471 views

Implementation of a fully-redundant, high-available iscsi SAN (consisting of n machines) in conjunction with clustered filesystem

a short example of how the infrastructure may look like: 4 servers act as iscsi targets and expose 1x2TB each (every of those servers has a raid10 for the storage, thus 2TB of usable capacity) n ...
6
votes
3answers
336 views

Is Clustering really = High Availability?

These days clustering is becoming synonymous to high availability. As an enterprise architect I have to shake my head in disbelief. IMHO, clustering can be a component of HA but is far from being HA ...
0
votes
2answers
1k views

HA web cluster setup

I'm setting up a highly available web cluster, I'm planning to start out with 2 web servers connected to shared storage (perhaps via NFS). What's the best way of implementing this? Should the web ...