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.
1
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1answer
121 views
Can Windows cluster failover a custom TCP Server application even when Windows itself is working?
I develop a TCP server application that listens to a specific port. One of my users is asking me if my application can run on an active-active Windows 2008 Enterprise cluster. Having only almost no ...
2
votes
2answers
682 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 ...
1
vote
1answer
169 views
Mysql migrate huge db from innodb to ndbcluster Err: the table is full
I'm trying to migrate old database to mysql cluster (4 data nodes) by using command:
ALTER TABLE sample ENGINE=NDBCLUSTER
but I'm getting the following error:
The table '#sql-7ff3_3' is full
...
4
votes
1answer
122 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? ...
3
votes
1answer
121 views
What is the differences between a Remote File Share Witness Quorum and a Disk Witness Quorum?
Say you set up a Windows Server Failover Cluster consisting of two nodes, on Windows Server 2008 R2 Enterprise.
Now when you want to configure quorum you can use either a remote shared folder, or a ...
3
votes
1answer
411 views
How do I network this Windows Failover Cluster and MongoDB Replica Set? (diagram inside)
As you can see, my two Windows Server Failover Cluster (WSFC) nodes have three network interfaces each, which connects them to three different networks :
A public network
A private network ...
0
votes
1answer
71 views
SQL Server 2008 instance's listening on mulitple ports on a cluster [closed]
I have three SQL Server 2008 instances running on a cluster. SQLInstance1 is listening on default port 1433, SQLInstance2 is listening on port 39999 and SQLInstance3 is listening on port 49999. Can ...
2
votes
1answer
158 views
Should a SQL Server tempDB partition be shared by the cluster?
We have a 2-node SQL Server 2008 RS cluster. The data and log partitions are shared among the cluster nodes. Does the tempDB partition need to be shared as well, or will local server node storage ...
-5
votes
1answer
100 views
1 tera flop cluster? [closed]
I want to buy a $40000 1 tera flop cluster to keep it in a room. What are the standard configurations?
Cluster is supposed to do molecular dynamics simulations on biological systems.
I'm proposed ...
0
votes
3answers
90 views
Clustering a web server
With 4 servers with OpenSuse is it possible to cluster them all together to run websites?
What is involved in clustering and is anything special needed to cluster the machines together so they work as ...
2
votes
2answers
2k views
How to make a DHCP server on virtual machine serves other virtual machines(on different physical machines)?
I'm building a virtual cluster with VirtualBox and Opensuse. I have 10 physical machines and need several vms on each. The virtual machines are supposed to be in a "private" network, but still have ...
-2
votes
1answer
94 views
Is a Cluster diffferent from a render farm [closed]
Can I do rendering on a HPC Windows Cluster with nodes.
I know and I do render using my render farm (100 computers Cinebench >500), but I'm not sure of that about a Cluster.
The issue is the cost ...
1
vote
0answers
296 views
csync2 ERROR: Connection to remote host failed
I was unable to find any articles to answer this question, so my best bet was to post this here:
Scenario
We have 2x application servers in production hosting a PHP website and I would like some ...
1
vote
1answer
224 views
Pacemaker corosync 2-node with a 3rd for quorum
I'm having trouble figuring out how to configure a 2-node setup with a third
simpler one for quorum.
It seems to think all the nodes have the capability to act as a full fallback node, when I only I ...
0
votes
1answer
97 views
Adding a site to cPanel when the domain already exists in the cPanel dns cluster [closed]
I am currently attempting to add a site to a cPanel machine when the domain name already exists within the cPanel DNS cluster. The reason behind this is to move the site on to a machine with a ...
1
vote
1answer
93 views
MySQL Cluster Failover doesn't work
I have two servers, where
First server 10.100.15.150:
1. one mgm server
2. one ndbd
3. one mysql api
Second server 10.100.15.160:
1. one ndbd
2. one mysql api
When i start all 'parts' of cluster ...
1
vote
6answers
832 views
alternative to Clusterssh for managing multiple SSH server
Is there any alternative to Clusterssh,pssh etc? to manage multiple ssh based servers through one interface?
one weakness in Clusterssh is that my servers use key based authentication, with ...
0
votes
0answers
112 views
Deploying a cluster under CentOS (SystemImager, BroadCom nextXtreme)
I'm writing on behalf of our sysadmin. He doesn't want to create an account here and I'm not a sysadmin myself (I hope I'll use the correct vocabulary). Feel free to ask me any additional information.
...
2
votes
2answers
466 views
Performance of Cluster Shared Volume file copy from SAN
I am hoping someone can help me out with a strange issue.
We are running a Microsoft Failover Cluster with Server 2008 R2 and an Equallogic PS4000 SAN. Our main configuration has 2 Dell Poweredge ...
1
vote
1answer
282 views
MySQL service does not start
My MySQL service is not starting. I am using debian wheezy as operating system in my VPS. I use MyISAM for storing tables.
Response when starting service
root@ipxweb1:~# service mysql start
[FAIL] ...
6
votes
5answers
2k views
Cluster failover and strange gratuitous arp behavior
I am experiencing a strange Windows 2008R2 cluster related issue that is bothering me. I feel that I have come close as to what the issue is, but still don't fully understand what is happening.
I ...
0
votes
0answers
68 views
Disabling 8.3 file name creation on cluster volume
I want to disable the 8.3 file name creation on a cluster volume.
The volume is at any time only one node assigned so if I disable the creation on one node the other node would create in event of a ...
1
vote
0answers
179 views
MySQL Cluster msql Node Does Not Connect
I have a mysql cluster consisting of the management node, two data nodes, and a mysql node. The two data nodes connect to the manager but when I try to connect the mysql node I get the following ...
0
votes
1answer
42 views
How can I get all resources that of a particular resource type using cluster.exe?
On a Windows failover cluster environment, we can use the command cluster resourcetype to get all available resource types. My question is, how can I get all the resources that is belong to this ...
2
votes
3answers
274 views
Is it possible to share the same folder name on two separate drives?
I have a Windows 2003 cluster that I'm trying to migrate to a new SAN. One of the drives that I'm copying data from has a shared folder (J:\SharedFolder)
I need to copy all data from J:\ to T:\ and ...
0
votes
1answer
2k views
HP P2000 G3 MSA (SAS) - Configuring 2 Hosts to use the same volume (cluster)
I have got 2 x HP DL360 G7 servers with the sc08 controller cards installed, and dual controller P2000 G3, the cabling is a single cable from each server to the controlelr cards (using SAS port 1 on ...
3
votes
1answer
2k views
Active/Active vs Active/Passive cluster
First time setting up a clustered environment, and have a few questions.
From a windows cluster perspective what determines if it is an Active/Active cluster vs an Active/Passive cluster? Is it the ...
0
votes
1answer
88 views
Building Windows Failover clusters, re-use quorum drives?
I'm building a series of virtual failover clusters, 2 for SQL, and 1 for BizTalk. Being that it is a Proof of concept virtual setup with no real expectations around high availability, is it possible ...
0
votes
2answers
103 views
Immortal application
(TL;DR: last paragraph)
I'm running an online service and have thusfar been doing offline backups and simple monitoring to achieve resilience and availability.
Resilience is rather manual but I'm ...
3
votes
1answer
136 views
Prevent iSCSI connection from being terminated early on reboot
I have a clustered Hyper-V environment with four nodes and three PowerVault MD3xxx storage arrays for shared storage.
The servers are using standard Ethernet connections for the iSCSI fabric (not ...
1
vote
0answers
204 views
Apache httpd active/passive setup
I want to setup apache web server in active passive mode to support HTTP failover on Redhat linux 5 machine.
I understand that 2 Linux boxes can be setup in HA using heartbeat or keepalived. Also, ...
0
votes
0answers
35 views
For a new Cluster - Should I use Hadoop distro or Install individual tools manually?
I'm in the process of setting up a small to medium size Hadoop cluster, and was wondering the approach I should be taking. I've looked into different community distros (Cloudera and MapR), and also ...
-2
votes
1answer
58 views
Do you know any cluster /dev/shm like interface or RAM based, cluster filesystem?
I am looking for some sort of clustered /dev/shm like device or RAM based, clustered filesystem, running on Linux, so it supports mirroring.
Or there is anything stable enough which would do the job ...
2
votes
1answer
187 views
What makes Lustre faster and more scalable than NFS?
I have read in various places (e.g. here and here) that NFS' I/O performance does not scale, while Lustre's does, and that Lustre can deliver better I/O rates in general.
There seem to be various ...
1
vote
0answers
218 views
MSSQL 2012 cluster - inactive node trying to access shared disk?
I've got an odd issue with a SQL 2012 cluster. The cluster itself uses FC shared storage, and generally works perfectly. The SQL service works, and failover occurs as expected.
The issue I have is ...
-2
votes
1answer
86 views
Does anybody wish to help a poor researcher publish a paper? [closed]
I don't know if this is a good place to beg for help, but here it goes: basically, I need to run a secure recommender system simulation (C++ console application) in order to meet tonight's deadline, ...
3
votes
1answer
126 views
What is and what is not replicated in a glassfish cluster with a mod_jk load balancer?
I have a Glassfish (3.1.2) cluster over 2 computers as nodes, with a mod_jk load balancer.
Are servlet instance variables replicated perfectly? If not, how do I make sure it is?
Are all actions, ...
0
votes
0answers
67 views
Windows HPC install with multiple network cards
I am trying to build a smallish HPC cluster for both College and Work related research, and decided that Windows HPC 2008 R2 Express is probably the best bet for me, since most of my machines run ...
3
votes
1answer
147 views
Are there any serverless distributed filesystems?
Similar to Is there a Distributed SAN/Storage System out there? or Distributed redundant storage solution?, except with a couple key differences (and two years newer).
Context: I have a small Rocks ...
0
votes
2answers
35 views
using multiple schemes in a clustered sql server 2008 Database
I have a SQL server 2008 R2 database with 2 schemas, i need to enhance the performance of the server so we plan to cluster the DB, we will have 2 nodes . is it possible to separate each scheme so each ...
1
vote
0answers
148 views
SQL Server 2008 R2 cluster on Windows Server 20008 R2 issue
I have a SQL Server 2008 R2 cluster on Windows Server 20008 R2. There are 2 nodes node1 and node2 in the cluster. When I start node1 and node2, I get the following statue information from them:
From ...
2
votes
1answer
1k views
IP failover with 2 nodes on different subnet: cannot ping virtual IP from second node?
I'm going to setup redundant failover Redmine:
another instance was installed on the second server without problem
MySQL (running on the same machine with Redmine) was configured as master-master ...
0
votes
1answer
123 views
NAS server freezes in cluster environment using NFS
In our department we have an Iomega NAS (px4-300d) connected to a Supermicro cluster with 5 nodes (12 cores per node). Each node mounts a share on that NAS by using NFS. Unfortunately after some time ...
1
vote
1answer
226 views
What's the right way to shutdown a SQL Server 2008 R2 cluster?
I'm new to SQL Server 2008 R2 cluster. I just created a test environment now I need to shut it down. I know SQL Server cluster is a high availability solution so there is seldom mentioned that how to ...
1
vote
1answer
377 views
SQL Server 2008 R2 cluster, “available storage” shows “offline”
I've installed a SQL Server 2008 R2 cluster and I found the resource group "available storage" shows "offline" status. What does it mean? It seems I can't take it online. I tried to use the cluster ...
1
vote
1answer
135 views
SQL Server 2008 R2 cluster installation, can I install on the 2 nodes at the same time?
I've configured the Windows cluster, now I need to install SQL Server on the 2 nodes. To save time, I want to know if I can install on the 2 nodes at the same time?
Thanks
0
votes
2answers
95 views
load balanced server farm in php with sql
What is the best configuration for a load balanced server farm for a high demand download web page that uses php and mysql. I have servers that currently use centos with lightppd.
Has anyone got ...
4
votes
1answer
235 views
Pacemaker/corosync timeout before resource transfers
This seems like a simple question, but one I can't seem to find the answer for despite going over the pacemaker documentation multiple times.
I've got corosync set up with pacemaker to share a ...
1
vote
2answers
84 views
Distributed mysql synching
I'm running a server which is connected to an SQL host. I have an another server and I decided to run it as an SQL backup. So, I have 3 of them. Srv A is the SQL host, srv B is the backup.
I know ...
1
vote
0answers
200 views
Windows 2003 cluster: One node offline causes the cluster service on the other node to fail
I configured a 2 node cluster on 2 Windows 2003 machines with Exchange 2003
The resources:
Majority node set
Data volume
Cluster IP
Cluster network name
Exchange 2003 system attendant (and all ...
