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117
votes
6answers
12k views

Are SSD drives as reliable as mechanical drives (2013)?

SSD drives have been around for several years now. But the issue of reliability still comes up. I guess this is a follow up from this question posted 4 years ago, and last updated in 2011. It's now ...
19
votes
17answers
24k views

What network file sharing protocol has the best performance and reliability? [closed]

We have a setup with a few web servers being load-balanced. We want to have some sort of network shared storage that all of the web servers can access. It will be used as a place to store files ...
14
votes
6answers
2k views

Cost effective, long term archival of video and image data? ~50 TB

My lab is in the process of setting up a small server that holds data (mostly video and image data, plus a few documents) for the project our group is working on at a moment in time. Historically, ...
11
votes
13answers
10k views

Why would wireless routers become less reliable over time?

I've been curious about this for awhile now. I don't know if I'm seeing a real pattern or not, but having worked with many home office/small office wireless routers for a few years now, I've noticed ...
10
votes
3answers
8k views

Battery Backed Write Cache

I recently got some U server price quotes and some of them include BBWC: What exactly does it do? Is it just for RAID configurations? If there is a power malfunction, isn't the data loss ...
7
votes
4answers
1k views

Tape vs SSDs backups regarding long-term storage reliability

My question is very specifically about solid state drives, not regular hard drives. I would like to put in place a grandfather-father-son backup scheme, with the SSDs being used for the grandfather ...
7
votes
7answers
850 views

Questions about single point of failure for small operations

1) If you can't afford or don't need a cluster or spare server waiting to come online in the event of a failure, it seems like you might split the services provided by one beefy server onto two less ...
7
votes
13answers
710 views

Most significant server outages in the past decade

What is the most significant server outage/downtime that occurred within the last decade due to performance issues, bottlenecks and scalability problems? Two such examples are the constant problems ...
7
votes
3answers
779 views

Can an SSD notify the hosting OS that its wear level is getting high?

I read a lot about SSDs and I am interested in them for server use. My biggest concern is their reliability. A lot of writes shortens their life span. I can mitigate this problem if I can run some ...
6
votes
4answers
865 views

The importance of ECC memory

Are ECC memory modules important to have on a non-critical server? I was thinking about getting myself a toy dedicated server for lots of random, non-critical stuff. Sporadic reboots are no big ...
6
votes
3answers
2k views

Does it make sense to install online spare memory?

I'm using HP DL360p Generation 8. I need a pretty reliable server, so I'm using RAID 1 with a spare drive, and I also added an extra power supply. But should I install online spare memory? Or ...
6
votes
6answers
3k views

How stable is zfs-fuse 0.6.9 on Linux?

I'm thinking of using ZFS for my home-made NAS array. I would have 4 HDDs in raidz on a Ubuntu Server 10.04 machine. I'd like to use the snapshot capability and dedup when storing data. I'm not so ...
6
votes
3answers
657 views

A strategy for network monitoring to improve network health?

The goal is to find out which parts of network should be upgraded / reorganized to improve network health (reliability and performance). What are the methods to monitor network traffic, detect ...
6
votes
4answers
1k views

Automatically-reconnecting TCP tunnel

I have an unreliable network connection between two machines: sometimes active TCP connections get dropped for reasons beyond my control. I want to establish a reliable TCP connection between the two ...
5
votes
2answers
3k views

It is XFS reliable? In case of a power gone off is xfs riskier that ext3 in data corruption/safey?

I have been having some electrical issues,mostly power going out suddenly for a few months,and although ups solve the thing mostly. But still i am worried about filesystem corruption,and data lost. ...
4
votes
5answers
992 views

Experiencing corruption! What's a good reliability test for a Windows file system, RAID or otherwise?

I have a Windows Server 2003 box on my small network. In it is a Promise Fasttrak RAID controller and two parallel ATA Western Digital drives in a RAID-1 (mirror) configuration. When I set this up I ...
4
votes
3answers
168 views

How reliable are current 2 TByte consumer grade disk drives?

Most cheap SATA disk drives are rated with "1 non-recoverable read error per 10^14 bits read". What does this mean? 10^14 bits is just 12.5 TByte. If I have a full 2 TByte disk and I copy it to a ...
4
votes
1answer
1k views

DNS Failover with multiple Nginx load balancers

Our application is hosted on EC2, however because the nature of the app, it requires extremely high availability. We have an image of the app running on Linode as a failover. However, doing a DNS ...
3
votes
5answers
495 views

Solid State Hard Drive

It's said that Solid State Drive is much better than SATA one as there is no spinning head or os. So, there won't be hard disk crash problem?
3
votes
5answers
1k views

redundant http load balancer

Got a simple scenario with two web servers for redundancy and to scale. But how do I make a two web-server setup fully redundant? I can think of two solutions; two web servers, one load balancer ...
3
votes
3answers
192 views

Can USB powered device affect longevity of the port?

Looking to purchase a new DVD Writer for the first time, I notice there are USB powered devices available which do not require an external adapter/power-supply. This may be sufficient for stuff that ...
3
votes
3answers
303 views

What is the best strategy to monitor health of hard disks?

What strategies do you use to monitor the health of your server hard disks? Do you schedule an automatic chkdsk with reporting? How are you alerted of failures?
3
votes
1answer
256 views

Failsafe Ethernet Switches on UAV

As a side project we are working on a new internal network for a small UAV and will base it on 100mbit Ethernet instead of serial coms that's usually used for these types of aircraft. We have gone ...
3
votes
6answers
647 views

Cheap, minimal, robust web application hosting for at least three nines (99.9%) uptime?

How can one achieve the cheapest yet very reliable web application configuration? Let's assume at least 2 application servers for $80/mo plus a DB server will support most people's applications for a ...
3
votes
4answers
13k views

Is there a reliability difference between 2.5“ and 3.5” HDDs?

I know there are a couple of key characteristics that determine the reliability of HDDs, but is there a difference between 2.5" and 3.5" drives? In the past I've always assumed that 3.5" drives ...
2
votes
5answers
189 views

Are web servers/services more prone to fail outside of working hours?

I've just had a server outage at 4.59AM on Sunday morning, and looking through our uptime records going back to 2006 all except for 4 outages out of 20 occured between 11PM and 6AM. (Only looking at ...
2
votes
5answers
2k views

How common are power supply failures in comparison to hard disk failures?

My webhost offers two different types of high availability options for dedicated servers: Redundant hard disks (RAID1) Redundant hard disks (RAID1) plus redundant power supply How common is a ...
2
votes
3answers
128 views

Achieving Five Nines

I am building a web application where uptime is key. I understand that 100% uptime is not realistic but I would like to achieve five nines. I'm unsure as to the most prudent way to accomplish this. ...
2
votes
3answers
249 views

Power supply reliability

Is a larger-capacity power supply likely to live longer than a lower-capacity supply, even if they both have plenty of capacity for the system they're on? For example, say I have a system where the ...
2
votes
2answers
1k 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 ...
2
votes
2answers
720 views

How does mtr work / interpreting pain points using mtr

I have been recently trying out mtr to get network congestion pain points. Following are sample mtr requests Example1 $ mtr --report -c 10 my.url.com HOST: ansh0l-Lenovo Loss% Snt ...
2
votes
1answer
3k views

Why does VPN IPSec client use UDP?

The VPN I use on my home Windows computer to connect to my company's servers is a Cisco client. The client is configured to use "IPSec over UDP (NAT/PAT)". Why would you use UDP, an "unreliable" ...
2
votes
2answers
2k views

How do you setup a SQL 2005 cluster in amazon EC2?

I am trying to setup a highly-available DB architecture in an EC2 servers. We are forced to use SQL 2005 for now. What kind of solutions would work in this context? Has anyone done it? I can't ...
2
votes
1answer
690 views

SSD system disk durability?

This is a follow up to Server System drive on a USB stick? Good? Bad?. I set my mind on this 2GB motherboard mountable PATA SSD. (I already ordered it because I had a voucher, this question is to ...
2
votes
3answers
83 views

Set up a temporary reliable database server on a budget of $0.00

I am helping run a Model United Nations conference for high school students. The conference is completely organized and staffed by university students. I am writing an application that will keep track ...
2
votes
1answer
355 views

Ubuntu server burn in test

We've assembled a simple storage server with COTS SATA disks that we're planning to tie together with software raid (Ubuntu Server, mdadm). What burn-in tests can one run to test the system, in ...
2
votes
1answer
80 views

Looking for a reliable web provider that supports ASP.NET? Shared LAMP account a plus

My title is probably not very clear but here's the deal. I'm a software engineer with experience in many languages but my current focus is Windows/Web applications using C# and .NET. I'm currently ...
1
vote
4answers
220 views

Configuring DNS to serve pages from multiple servers for a single domain

I have some really high-availability web page content that needs to be online 24x7. So instead of relying on a single server I was wondering if I could handle one domain name with multiple servers? ...
1
vote
6answers
753 views

How to protect power strips from accidental shut-offs/“cleaning lady” attack?

Are there any power strips or products designed to defend against a "cleaning lady" attack (cleaning crew is vacuuming the floor and bumps the power strip switch, turning off all the connected ...
1
vote
3answers
1k views

network layer reliability

I have a question about the reliability of network layers, I think in the network layers there is a redundancy, my question is why both link-level and end-end reliability need?
1
vote
8answers
1k views

Incoming mail from sender, MX record won't accept replies. How to block the incoming SMTP connection from that sender?

I'm administrating a mail service for a small business. They have a mail host, foo.example.org, whose internet connection is an ADSL service with a permanent IP address. Unfortunately, many mail ...
1
vote
6answers
1k views

Rackmount Server Reliability by Brand Name and Form Factor

Our company runs e-commerce web sites (thousands) on two clusters in two separate data centers. Basically, all we require to operate is rack mountable server nodes. Each node needs: 1.) 4 or 8 ...
1
vote
3answers
176 views

How to make PHP more scalable on Unix Apache

I'm looking for free/low cost ways to make PHP running on our Unix Solaris servers (under Apache) more scalable and reliable. Do you recommend the free version of the Zend Server? Are there other ...
1
vote
3answers
91 views

Fast and reliable desktop-grade drive

I'm looking for desktop-grade drives to build a distributed storage cluster (chunks are replicated on software level). I don't mind their mission critical ability, which clearly impossible with their ...
1
vote
2answers
2k views

How to configure Apache to automatically restart itself every N requests?

We host svn on Apache 2.2 and it's memory usage slowly grows until it just halts. I've heard that there's a magic settings that makes Apache restart itself automatically after processing every N ...
1
vote
5answers
520 views

When running a shell script, how can you protect it from overwriting or truncating files?

If while an application is running one of the shared libraries it uses is written to or truncated, then the application will crash. Moving the file or removing it wholesale with 'rm' will not cause a ...
1
vote
2answers
440 views

TCP vs UDP Error-Checking

I've bounced upon two articles that describe in-depth on how TCP and UDP connections work. However there is some kind of inconsistency. Where one article tells me that UDP does no Error-Checking at ...
1
vote
3answers
777 views

Is MySQL Replication on Windows reliable?

We played a bit with postgresql and slony for a master-slave-slave replication setup on windows. But we hit a wall with failover/switchover which is very unreliable. How about MySQL? How reliable is ...
1
vote
1answer
182 views

Consistent Reliable Messaging

Hay All.. Im working a new project, Im currently deciding between flume & scribe for messaging systems... ( most probably sent to logs or hadoop ) I cannot lose a message ever.. What are ...
1
vote
0answers
112 views

Obtain event servity from Win32_ReliabilityRecords

Microsoft introduced the "Reliability Monitor" in Windows Vista. I use WMI to access this information, and more precisely I query the Win32_ReliabilityRecords class. This yields the list of events ...