A computer cluster consists of a set of loosely connected computers that work together so that in many respects they can be viewed as a single system.

learn more… | top users | synonyms (1)

4
votes
5answers
144 views

send files to dozens of servers quickly

We have a cluster of machines (around 50 and growing). Each machine has a search index that needs to be updated multiple times per day. We currently update the index on each machine individually, but ...
1
vote
1answer
471 views

DFS Replication Manager on Failover Cluster Nodes

I currently have a VM architecture setup for high availability / manageability. The one point of failure is that I have a single windows 2008 machine that runs DFS replication across the servers in my ...
0
votes
1answer
1k views

Apache Kafka consumer client connecting to Apache Zookeeper: EndOfStreamException

I get an error when trying to 'consume' messages from Kafka (2.9.2-0.8.1) with a Zookeer stand-alone (3.4.5). You can see the source code below as well as the error message and logfile from Zookeeper. ...
1
vote
1answer
177 views

MSTDC in SQL Server 2012 - Windows Server 2012 R2 with high availability

We had implemented SQL Server High Availability on two physical servers over the VPN network. SQL Server 2012, Windows Server 2012 R2. It was noted that, Distributed Transaction was working perfectly ...
0
votes
1answer
209 views

Using DHCP, is it possible to obtain an IP address & MAC address for a cluster? [closed]

I know that DHCP assigns IP addresses, but does it also assign a MAC address? Is this a commonly used paradigm for cluster/cloud computing? Perhaps DHCP could be used to dynamically assign a new IP ...
0
votes
2answers
244 views

High Low priority queues SGE

I would like to have two queues in a CPU/GPU cluster, one with high priority and one with low priority. Thus, jobs that are submitted in the high priority queue will be bumped to the top of the list ...
1
vote
1answer
193 views

How can I run a CentOS (Red Hat) cluster in degraded mode?

I've installed Red Hat's cluster software on an install of CentOS 6.5, and use it to provide redundant routing from one network to another. This works fine, and I have a pair of boxes providing the ...
2
votes
1answer
295 views

Beowulf cluster storage setup [closed]

I'm a Computer Engineering student working on a project with a Verari blade cluster, a bit outdated for today standards. I had acquired some Unix experience but I'm not an expert at all. This Verari ...
0
votes
1answer
552 views

Pgpool configuration with Liferay cluster

I'm using a Liferay cluster connected to pgpool2 and when I run heavy user activity against the web servers I see a lot of exceptions regarding liferay unable to establish a connection to the DB. ...
1
vote
1answer
2k views

Failover Cluster Client Access Point Only Responds to Pings on the Owner Node

Background We're running two VMs (Windows Server 2012 R2) on Azure with SQL Server installed, set up as an availability group. We also, of course, have another VM as a dedicated DC. These are all ...
2
votes
1answer
522 views

MariaDB how to handle 2/3 node failure in multi master cluster.

I run 3 node multi master MariaDB galera cluster. It basically works for me how it is. When one node fails, two other work and it's fine. But I'm wondering is there a way for it to keep working on ...
2
votes
1answer
409 views

How can I store my ElasticSearch indexes/shards?

I'm trying to figure out how can I store the ES indexes. Actually I have two VMs running on 2 ESXi hosts, using 32GB vmdk... Wondering if i could share those data or is it necessary to have duplicate ...
0
votes
1answer
122 views

JBOD or RAID on a streaming server setup

Currently my setup is 1 main server which holds all the mp4 videos and 3 other servers which holds portions of this video. The process is: when a user uploads a video, it is stored into the main ...
4
votes
2answers
2k views

SQL Clustering or Hyper V Clustering

We will soon be implementing our Dynamics AX installation. Our aim is to have high availability and we are working closely with our implementers. We raised the question to them about SQL and Hyper-V ...
0
votes
0answers
513 views

Cannot ping Windows Cluster Nodes with Cluster IP on same subnet

I am facing a strange problem here, I have a 2 Node cluster, Node A and Node B. I cannot ping Nodes one another in MSCS Cluster with the Cluster IP even if they are on same subnet. I can ping one ...
1
vote
1answer
46 views

How to prevent load balancer from failing?

sorry if the question is a bit ambiguous but it is the first time for me to set up a load balancer and I am a little worried. I want to create a Glassfish Cluster, at the moment I am following this ...
1
vote
2answers
105 views

MySQL Replication threeway

We have MySQL Multi-Master replication setup between two servers ( A & B ). It has been working for a few years now and life is good. The management tool in our office connects directly to ...
1
vote
0answers
59 views

Hardware configuration for head nodes (HDDs, memory, processor, redundancy)

I'm designing a head node whose primary function is to submit jobs to the Torque/Maui scheduler and secondary function is to run test jobs. Unfortunately, most hardware selection guides for clusters ...
-6
votes
1answer
97 views

What is a cluster IP? [closed]

I am in process or configuring remote web host service and I have option of configuring should I use cluster IP. Could some please explain what a cluster IP is and what are the benefits of using ...
0
votes
1answer
167 views

Session clustering with Jetty-runner 8.1.14.v20131031

I'm using Jetty-runner 8.1.14.v20131031 and I would like to know what's the easiest way to achieve session clustering between multiples running instances.
0
votes
1answer
133 views

Can I publish to multiple distinct etcd clusters from a single host?

I have a number of distinct etcd clusters, I would like to be centrally controlled: I have multiple distinct etcd clusters. Hosts in one cluster should not have any access to config in another ...
2
votes
1answer
319 views

Best method to share ISCSI lun across cluster of app servers

I'm in the process of migrating our cluster to new hardware. We use bare metal servers, no virtualization. Currently, we have around 30 "application" servers. When we make an update, we push the ...
0
votes
2answers
207 views

Sharing a SAN LUN across 2 clients

I have an ISCSI SAN that we purchased to store images for our cluster (2TB of images). After reading, we probably should have gone with a NAS rather than a SAN, but back to the point. I'm going to ...
1
vote
0answers
383 views

SQL Server 2012 Cluster BSOD

I'm trying to set up a SQL Server 2012 SP1 "AlwaysOn Failover Cluster Instance" on top of a Windows Server 2012 R2 cluster (cl01) consisting of 2x 2012 R2 nodes (sql1 and sql2). Hosted on VMWare ESXi ...
-2
votes
1answer
38 views

database cluster fail over [closed]

I planed to develop a customized HA program for MSSQL, but I got a question when reading some articles about cluster. When master is down, then slaves vote for a new master, and the new master will ...
1
vote
1answer
270 views

Openswan High Availablity

I have configured hardware(juniper) to software VPN(openswan) tunnel. I want to make openswan highly available. I was wondering if i can configure openswan cluster, but I didn't find anything ...
3
votes
1answer
2k views

clvmd problems during the RHEV cluster deployment

We are deploying Red Hat Enterprise Virtualization cluster and we faced a problem attempting to start clvmd service after the lvm partition creating. The following has been completed successfully: ...
1
vote
0answers
35 views

pacemaker cluster heavy load with sbd and noop scheduler

Anybody have experience with nood scheduler? i know the sbd process is a real time process, so with default linux io scheduler cfq, the sbd process works very well on high io heave load. The noop ...
2
votes
1answer
254 views

Can I run multiple nodes of Cassandra on my mac without a virtual machine for each?

You can see in the doco here that setting up each instance of Cassandra requires a new 'node'. My question is - to run a cluster with multiple nodes of Cassandra on my Mac (Running Mavericks) - do I ...
2
votes
1answer
3k views

How can I move the data files for a VM to another location?

We have a cluster of 3 x 2008 R2 physical hosts running Hyper-V. How do I safely move the VHD(s) and accompanying XML files, etc, for a specific VM to a new location? I want to keep the VM with the ...
1
vote
0answers
303 views

RabbitMQ and federation. Cross datacenter virtual queue?

I'm building a system that sits in two datacenters for resiliancy, using a live / standby model. The system requires a message queue that delivers messages for processing by the system backend. My ...
2
votes
0answers
88 views

Multiple httpd with JBoss cluster: provide httpd HA

I have a working configuration like this: +-----+ +-----+ +-----+ +-----+ | i1 | | i2 | | i3 | ... | in | JBoss Cluster +--+--+ +--+--+ +--+--+ +--+--+ | ...
1
vote
3answers
5k views

How to set up a pacemaker cluster for active/active scenario and how it works?

I try to set up my first pacemaker cluster as a FTP Server. There are two Server installed with a fresh centos 6.5 and proftpd First step was to install pacemaker and some configuration Tools with: ...
0
votes
1answer
41 views

Dev mysql node with Percona

I have been tasked with creating a Development mysql instance, We currently have a 7 node Xtradb cluster, is there any way to have this node a few hours behind, or not allow replication back to the ...
1
vote
1answer
155 views

Failover clustering or Network Load Balance on windows server

I have 2 servers with Windows 2008 R2 standard OS. I need to create a cluster in case on of the servers goes down ; so the other one will continue provide services. The services we mostly use are a ...
1
vote
1answer
493 views

Does Win 2012 Standard Edition support clustering of SQL 2012 Enterprise Edition?

Can you cluster SQL 2012 Enterprise Edition on Win 2012 Standard Edition? The features doesn't seem to clarify whether it allowed or not. We are seeing warning “Cluster Nodes Failed" in the SQL ...
0
votes
3answers
1k views

Windows Server 2012 Hyper V Clustering Live migration Hot Failover

We are thinking of implementing Hyper V Clusteriazation on Windows server 2012 servers. We aim to use the Live migration feature to eliminate downtime when one of the servers fails. My question is: Is ...
1
vote
1answer
149 views

Best way to deploy changes in an HAProxy cluster

I have a two-node HAProxy cluster with Keepalived to provide high availability and redundancy. Now I'm trying to figure what is the best way to do changes in the configuration of my HAProxy's. Is ...
0
votes
1answer
92 views

Is a SSI-style cluster possible with Windows Server 2012?

I use an application that does CPU intensive multithreaded optimization which is currently run on a hyper-threaded Quad Core machine that it just pegs at 95-100% utilization across all cores for ...
2
votes
2answers
2k views

Multiple NIC arp issue

I'm troubleshooting an issue on Centos 6.4. I have a few systems setting up for greenplum. Each one has two "interconnect" interfaces connecting to an isolated subnet. It is like a cluster ...
0
votes
1answer
682 views

Create Cluster Windows Server 2012 R2

I have two virtual machines (Node1, Node2). Node1 set DC, Node2 connecting to domain.enter image description here. I'm trying to create a cluster, on Tab "Select Servers" add the Nodes. An error ...
1
vote
1answer
61 views

Update computers on private network

I have a small grid of computers that form an analysis cluster. One master node with internet on eth0, and a couple of private static IP workers connected to a switch. The master is also connected to ...
2
votes
0answers
56 views

SQL Failover Cluster IP Migration

I have a four node cluster setup which I need to migrate from subnet A to subnet B. The cluster has roughly 12 instances running on it. I've found articles to update the SQL Cluster IP, but I've got ...
1
vote
1answer
105 views

Sharing information between nodes in Beowulf Cluster

I am setting up a beowulf cluster and I've been reading that it might be necessary to make the home directory of the cluster users shared between them (assuming this users are local to each machine). ...
0
votes
2answers
424 views

Just a few questions about Hyper-V virtual machines and clustering

I have been using Microsoft’s Hyper-V technology for a little while now, but I am just now dipping my toe into clustering. In particular, I am trying to implement a fault-tolerant SQL DB. This ...
0
votes
1answer
318 views

Windows failover cluster - virtual node with multiple Client Access Names

I recently encountered a customer environment in which they had failover cluster where one of the virtual nodes had more than one 'Client Access Name' (i.e. more than one IP address and DNS name for ...
3
votes
1answer
195 views

Choice of distributed filesystem for intensive reads and writes

I have a series of servers (HP ProLiant, 34 servers) each of which with 500 G of hard drive space. These servers are part of a computational cluster which runs processes that roughly fall into two ...
0
votes
1answer
254 views

SNMP walk on Virtual Ip not working? what can be the reason

I have two MSSQLcluster, at a time VIP [virtual ip] that will be assigned to on of the master. The problem is when i try to do any snmpwalk on VIP from a different machine its returning me a time out. ...
2
votes
1answer
130 views

Galera Cluster starting backup can't find innobackupex in the path

I am trying to get a Galera cluster running. I have the first node up and ready for connections. My second node, however, when trying to run wsrep_sst_xtrabackup gets the error "Can't find ...
0
votes
1answer
398 views

pbs check how much cpu a job is using / job % cpu usage

On a cluster a job is submitted to run on N CPUs. qstat -f doesn't show how much CPU resources the job is using other than the time. How does one check whether 100% of each CPU power is used? It is ...