Capacity planning is the science and art of estimating the space, computer hardware, software and connection infrastructure resources that will be needed over some future period of time.

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91
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2answers
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Can you help me with my capacity planning?

This is a Canonical Question about Capacity Planning Related: How do you do Load Testing and Capacity Planning for Web Sites? How do you do Load Testing and Capacity Planning for ...
82
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5answers
32k views

How do you do load testing and capacity planning for web sites?

This is a canonical question about capacity planning for web sites. Related: Can you help me with my capacity planning? How do you do Load Testing and Capacity Planning for Databases? ...
49
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2answers
4k views

vSphere education - What are the downsides of configuring VMs with *too* much RAM?

VMware memory management seems to be a tricky balancing act. With cluster RAM, Resource Pools, VMware's management techniques (TPS, ballooning, host swapping), in-guest RAM utilization, swapping, ...
28
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1answer
5k views

How do you do load testing and capacity planning for databases?

This is a canonical question about capacity planning for databases. Related: Can you help me with my capacity planning? How do you do Load Testing and Capacity Planning for Web Sites? ...
24
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9answers
19k views

Maximum number of files in one ext3 directory while still getting acceptable performance?

I have an application writing to an ext3 directory which over time has grown to roughly three million files. Needless to say, reading the file listing of this directory is unbearably slow. I don't ...
11
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3answers
4k views

MongoDB and datasets that don't fit in RAM no matter how hard you shove

This is very system dependent, but chances are near certain we'll scale past some arbitrary cliff and get into Real Trouble. I'm curious what kind of rules-of-thumb exist for a good RAM to Disk-space ...
10
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6answers
975 views

Accurately trending random I/O performance for capacity planning

Where I work we have a numerous "big iron" servers which are used used for hosting many virtual machines using a Xen Hypervisor. These are typically configured with 32GB RAM, Dual Quad core processes ...
10
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2answers
785 views

How do you estimate how much memory to buy?

I have a custom server application that runs on Windows 2008 R2. It is a home grown Windows Service written in .Net supporting a number of custom terminals. I have a test machine that has a similar ...
7
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4answers
2k views

Open source DCIM stack?

Our 500-server data center is growing quickly and my manager has started investigating using a specialized Data Center Infrastructure Management (DCIM) package to help manage constraints. DCIM ...
6
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7answers
848 views

When to Add another server(s) [duplicate]

When is the right time to start adding(or thinking about adding) servers to your Web Application? What are the difficulties involved in going from a single server(DB and Web) to multiple? For example:...
5
votes
1answer
2k views

Load-testing tools for Active Directory?

Are there any tools out there that can torture-test and measure AD performance? We're looking at a fairly major expansion of our environment (think tens of thousands of computers) that will throw lots ...
5
votes
2answers
359 views

How do I understand my CPU usage on a DNS server?

I have read and understood Can you help me with my capacity planning?, but I'm not sure I understand what my next steps are in a DNS server scenario. I think my CPU loads are high or that I might be ...
5
votes
5answers
3k views

When is the right time to add a separate database server, add more web servers?

Usually web projects start small, everything is on the one server. But if site becomes popular one server won't be enough. So, since I don't have any experience in this, I'd like to get an idea of: 1. ...
5
votes
1answer
2k views

Should VMware HA Admission Control be enabled for small (2/3-host) clusters?

Take the following common scenario... A basic vSphere cluster running two or three hosts, shared storage and a token set of virtual machines under Essentials Plus or greater licensing. Should HA ...
5
votes
3answers
2k views

How do I calculate the disk subsystem i/o capacity

I am trying to figure out the number of 8K page i/o capacity for a disk subsystem. The drives are SATA 7200 RPM - 4 drives in a RAID-5 configuration. I am not sure about the SCSI controller but the ...
4
votes
3answers
5k views

When using thin-provisioning with ZFS, how do you make sure you don't run out of physical disk space?

Forgive me if this seems like a fundamental question, but I couldn't really find anything concrete on Google, and I'm not a system administrator by trade. We are setting up a SAN at our office using ...
4
votes
1answer
118 views

Planning for growth in a virtualized environment

In follow-up to an old question (and somewhat related to this), what trending tools/methods can be best utilized to help anticipate growth in a virtualized environment? For example, how do you go ...
3
votes
6answers
267 views

Is mixing IT infrastructure and development VMs into the same physical machine a bad idea?

As a system designer, would you put VMs responsible for core infrastructure (dns/dhcp/directory/web/wiki/repos/file share etc) and VMs used for development and testing on the same physical machine? ...
3
votes
6answers
3k views

Planning my first server with Ubuntu KVM Virtual Machines

I am putting together a dual-xeon quad core (i.e., 8 cores total) 12GB RAM linux server to replace several old smaller servers. I would like to use virtualization both to learn about it and because ...
3
votes
4answers
23k views

How long does it take to fsck a volume?

We are running a website which is currently serving 3-5 million page views. Our site is a file sharing site and so it contains 250,000 files and few thousand symbolic links. The hard disk is a 1500GB ...
3
votes
3answers
2k views

How many IOPS do I need? My workload bottleneck is storage

How can I know how many IOPS I need my storage to deliver for my overloaded Linux server? I have a server and I know it has storage as its bottleneck. I would like the bottleneck not to be storage, ...
3
votes
2answers
558 views

Small office WiFi network with Airport Extreme (15 people) advice

Hi I am having some problems with creating a decent office wifi setup. This is the current setup: Users via Wifi x15 > Router wired into > Airport Extreme wired into > Phoneline So our 15 ...
3
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7answers
736 views

Is it enough a 100Mbps LAN for a server rack? [duplicate]

My website is growing and growing. So now i'm considering moving to a 2-server virtual rack (in ThePlanet). Im thinking on using one server for the DBMS and the other for the Webserver (currently I ...
3
votes
1answer
2k views

Bandwidth planning for TCP/IP and Ethernet overhead

During typical capacity planning processes i see a perhaps simplistic consideration for estimating only the page or data sizes that are expected to pass through the network pipes. That means like in ...
3
votes
1answer
397 views

Throughput; capacity planning help for C10K like design [duplicate]

I am designing a network service in which clients connect and stay connected -- the model is not far off from IRC less the s2s connections. I could use some help understanding how to do capacity ...
2
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1answer
274 views

Sizing Switches for Storage and Production

Couple questions. Should you always completely separate the storage network switches from production switches or are VLANs fine to segment this traffic? Is there a golden rule here? How do you ...
2
votes
1answer
759 views

What fiber should I run between 2 floors in a company site?

I'm helping a customer in moving his company to a new building. There we'll have two racks on two different floors to accomodate various servers and switch infrastructure. We'all also use the ...
2
votes
1answer
272 views

MongoDB Sharding Config and MongoS Storage

In doing this year's budgeting, I need to estimate the capacity needs for next year. We are planning on needing to shard our MongoDB Replica Set out to 4-shards, but I have the disk capacity needs ...
2
votes
2answers
466 views

Automatic VM capacity planning

Situation: I've got a bunch of blades, all with same amount of memory and cores in each. Some have local storage, some do not and rely on the SAN. I've also got a ton of VMs that I need to build ...
2
votes
2answers
220 views

What percentage of its capacity should I aim to run a network at?

First of all, apologies if this is the wrong StackExchange site for this question - it's about Ethernet network capacities, but not specifically about servers etc. I am designing a network for a data ...
2
votes
2answers
440 views

Aids for capacity planning? [closed]

Are there any resources (Templates, tools, etc) that a sys admin would use to perform a capacity planning study? I am going to setup some servers on the cloud but I need to know how many I will need ...
2
votes
1answer
1k views

How many instances of rails can I run on one server?

I'm a developer trying to determine the best way to approach a rails app. I need to provide some options for deployment and am trying to minimize both development costs and long term hosting costs. ...
1
vote
3answers
375 views

Need some input for ideal server setup [duplicate]

Possible Duplicate: How do you do Load Testing and Capacity Planning for Web Sites First off.. HUGE kudos the the creator of this site as well as the others in this series. As a pre-cursor... ...
1
vote
5answers
7k views

Server Room Physical Size and Layout [closed]

I’ve read the “perfect server room” answers and a few other similar questions' answers, but I didn’t see any really good answers on how much physical space is the right amount. Do you keep your racks ...
1
vote
3answers
185 views

Criteria for VM deployment

What technical criteria do people use when ascertaining an applications suitability for virtualisation? I know things have moved on a bit since a few years ago so I would like peoples experiences and ...
1
vote
2answers
144 views

How might I estimate size of changed blocks on a system over 24 hours?

I'm going to use a block-level backup solution to backup a Hyper-V server running SBS 2008 plus two additional instances of Windows 2008. It's fairly lightweight in terms of relative use. Total file ...
1
vote
2answers
2k views

hardware sizing vs capacity planning

Folks, Is hardware sizing and capacity planning same? I have seen these terms being used together and google does not return any results that help me understand the difference. Would appreciate any ...
1
vote
1answer
123 views

Best practices for scaling and capacity planning : VM only ? VM+Container ? Container only ? Cluster ? Something else?

(I can't find a similar question which has been already answered but maybe I do not use the good words as I'm a french student ;)) The closest answer to what I'm looking for is : Scalable Web ...
1
vote
1answer
214 views

VPS users capacity [duplicate]

Possible Duplicate: How do you do Load Testing and Capacity Planning for Web Sites I was wondering if there is a way to actually determine how many users my VPS can handle until it will run ...
1
vote
1answer
446 views

Setting Up Development Environment for Distributed Team

I need to set up a development environment for a small distributed team of under 5 programmers to build a site using Drupal. Development is done by each programmer on his/her own machine. Ideally, ...
1
vote
3answers
215 views

http reqest and response route(s)

Hope in the right place.. So I've loadbalancer(LB) and two Apaches(A1 & A2) underneath. All of them have public IPs. Now my question is; Client requests a website -> request goes to LB -> requets ...
1
vote
1answer
1k views

Complete infrastructure capacity planning exercise [duplicate]

Despite my colleague and myself being application developers by nature, our current contract engagement has placed us into the infrastructure operations branch of our customer. While we are still ...
1
vote
1answer
70 views

On a web server with very high load, what determines which requests connect?

Glastonbury tickets went on sale this morning and I didn't even get through to a holding page despite having multiple tabs open with their own cookies and refreshing like crazy. I got 'This webpage is ...
1
vote
1answer
675 views

VMware vSphere VM at 100% workload CPU when real load average is near 0

I'm using VMware vSphere 5.5 on an ESXi 5.5 Host to host a small private web site. Host server is an HP ProLiant 380 DL with 50 GB Ram, 1 TB SSD storage, 2 Intel Xeon 5550 CPU. There are 10 running ...
1
vote
1answer
577 views

Guide to Apache performance monitoring and capacity planning? [closed]

Can someone point me at a guide on performance monitoring and capacity management of an Apache web farm? Other questions suggest some tools, but I'm also interested in understanding what the various ...
0
votes
4answers
4k views

How many websites can my server potentially hold? [closed]

Sorry for the "noob" question, but... About how many medium-sized websites with average traffic could this server hold? Just like the average website, kind of like a small business site. How many ...
0
votes
2answers
946 views

Is it possible create a 4TB bootable partition in the x86 edition of Windows Server 2003 Enterprise?

I'd like to find out if there is any way to accomplish this, since it would benifit my storage server greatly. I am using a Promise FastTrak 8660 and five Seagate ST31000340NS 1TB drives in a RAID 5 ...
0
votes
3answers
384 views

Server requirement for running an application having huge network traffic

What I am asking is a very common question that comes to any developer's mind when he/she wants to host a server but a precise answer is not easily available. I need to host a server which returns ...
0
votes
3answers
6k views

How to calculate/estimate the capacity of a switch theoretically [closed]

I don't know whether this is the correct place to ask this question. If not, could any one tell me some sites or forums to ask such questions? Thanks in advance. My question is the same meaning as ...
0
votes
2answers
554 views

Calculating required uplink capacity of network switch [duplicate]

Is there any common method (usable in practice) for estimating the uplink capacity of switch based on known number of users connected to this switch and the maximum internet speed they are allowed. ...