Server Fault Stack Exchange
Server Fault Stack Exchange

Questions tagged [fault-tolerance]

89 questions
1
vote
0 answers

What database am I seeding from in a stretched DAG?

I have a stretched DAG across 2 sites, with 4 copies. One of the remote copies failed, and I issued a re-seed operation with the remote&working copy as a source. Knowing this, I tried to work backwards, and see if Powershell is able to tell me…
makerofthings7
  • 8,911
  • 34
  • 121
  • 197
1
vote
2 answers

Dell PERC H700 and 8 disk slots : what are my options to increase disk fault tolerance?

We've got a Dell PowerEdge T510 which has 8 disk slots in the front. It is currently utilising 6 of these slots, and the disks are controlled by a PERC H700 controller. The disks are currently running in the following configuration 2x500GB in RAID…
sbrattla
  • 1,578
  • 4
  • 28
  • 52
1
vote
1 answer

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 switches off a particular node if it's gone…
user93353
  • 287
  • 1
  • 6
  • 17
1
vote
2 answers

Record DNS for 2 static ip - fault tolerance

i've a web server in a DMZ reachable from 2 different public static ip addresses provided by 2 different internet connection by 2 different ISPs. I want to create a record let's say "myserver.contoso.com" that load balance the two ip in normal…
eldblz
  • 385
  • 2
  • 11
  • 21
1
vote
1 answer

Why state is needed for keepalived

From the doc ! MASTER and BACKUP state are determined by the priority ! even if you specify MASTER as the state, the state will ! be voted on by priority (so if your state is MASTER but your ! priority is lower than the router with BACKUP, you…
Howard
  • 2,135
  • 13
  • 48
  • 72
1
vote
2 answers

Stratus Servers vs Virtualised Machines as a High Availability Solution

I've been asked to do this as a presentation, but to be honest, either I've totally missed the point or am I being asked to compare an actual company i.e. Stratus against the concept of virtualising machines, in regards to high availability…
thexhangman
  • 11
  • 1
1
vote
2 answers

haproxy failover with process monitoring?

I know some people are using keepalived and heartbeat for active/standby but what action is taken if the haproxy process were to die? What would be nice is if the virtual IP would switch servers if the haproxy process were to die and/or a networking…
CarpeNoctem
  • 2,437
  • 4
  • 23
  • 32
1
vote
0 answers

Basic solution for IP address failover on Windows

I'm trying to find a basic solution that will allow an IP address to fail over from one Win2k3 server to a standby one. I've got my own programs that can detect when a failure has occurred and trigger the IP address failover but I'm struggling to…
sipsorcery
  • 218
  • 1
  • 7
1
vote
1 answer

True memory-synchronous write flushing -- drbd protocol B-?

Is there a way in DRBD to make a real fully memory-synchronous cache? I might best explain substituting current explanation with my own one: Protocol B. Memory synchronous (semi-synchronous) replication protocol. Local write operations on the…
Motiejus Jakštys
  • 200
  • 1
  • 5
1
vote
4 answers

Stress test a server for simultaneous connection

I am trying to figure out a practical way to stress test a server for 300 to 600 simultaneous connections. Any advice? Thank you everyone for the help. To be more specific (sorry I wasn't before) this is a Flash Media Server on AWS that will be…
weston smith
  • 11
  • 3
1
vote
1 answer

fault tolerant file systems

some filesystems like btrfs and lustre are marked as fault tolerant file systems in : wiki:http://en.wikipedia.org/wiki/List_of_file_systems what's meaning of fault tolerant file system at all? does it offer some thing more than journaling? if you…
amin
  • 225
  • 2
  • 11
1
vote
2 answers

Windows Server 2008 Enterprise edition (cluster's ip address)?

My question is first of all for guys who had experience with Windows Server 2008 R2 Enterprise edition. As i found i can bake cluster (Failover Cluster Nodes). This cluster gives me one ip adress. So question: can i bind this virtual ip address to…
Edward83
  • 123
  • 1
  • 5
1
vote
1 answer

VMWare FT, 10GbE, 4 NICs - possible?

I'm trying to investigate if VMWare FT will be available in the following networking configuration. We have 4x 10GbE NIC's, two of which are for the MPIO iSCSI networking, which leaves 2x NICs for the rest of the system. NIC1: iSCSI MPIO NIC2: iSCSI…
Mark Henderson
  • 68,823
  • 31
  • 180
  • 259
1
vote
0 answers

Computing stripe count for erasure coded storage

I'm setting up a ceph cluster (first time for me) which in the end will be made of ~100 disks spread over 10 hosts. I'm going with a single erasure coded data pool to maximize disk space; my constraints are ~80% efficiency and a fault tolerance of 2…
Nicola Mori
  • 281
  • 1
  • 7
1
vote
1 answer

standalone mysql 5.7 instance on a preemptible node, which settings can make it run in the most fault tolerant way possible?

Simplifying, I have a standalone mysql instance running on a docker container hosted on a preemptible node. That means that at least ever 24 hours, the underlying node is killed, and a clean shutdown is never guaranteed. Before going this route, I…
Michele
  • 11
  • 2
1 2 3
4
5 6