Questions tagged [capacity]

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Size on disk smaller than capacity but no free space

We have a Windows 2012 Veeam Server with a volume that we use to store our backups on. The volume has a capacity of 14.9 TB and has data deduplication enabled. On the volume there are folders for the ...
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1answer
48 views

Varying hard drive capacities and RAID

Hard drives with equal capacity specs are not really equal in size, e.g. I have two 4TB disks with the following capacities: Disk 1: 4,000,752,599,040 bytes Disk 2: 4,000,786,153,472 bytes Afaik a 4 ...
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1answer
44 views

How can I plan server hardware capacity for a project [duplicate]

I want to learn that how How can I plan server hardware capacity by a project. But I need scientifically and provable solution for this planning. For example I have a project. That has 1000 ...
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2answers
2k views

btrfs increase raid capacity by replacing disks (and not adding disks!)

I'm very excited about the new features of btrfs and would like to start tesing it. Before I get started, I would like to ask if btrfs supports increasing raid capacity by replacing disks by bigger ...
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1answer
1k views

Hard disk reporting incorrect size in BIOS

I have a server with a software RAID system. There are 4 disk in the array: 4 x 4TB model WD40EFRX-68WT0N0 I noticed that the OS was reporting one of the disks to be 3TB, so I rebooted and ...
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1answer
349 views

Varnish Capacity Planning and Hardware Sizing

we want to run a new varnish node to cache video segments "average object size 3MB" and wondering if there is a way to measure the hardware specs "CPU/Memory/Disk" required based on the user's ...
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2answers
554 views

4TB drives in RAID 1 with Promise SuperTrak EX8350

Two 4TB drives are connected to a Promise SuperTrak EX8350 controller with the intention of setting-up a RAID 1 array. Before attempting to create any logical drives, the capacities of both drives ...
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2answers
23k views

Insufficient free space: X extents needed, but only Y available

I'm trying to extend a LVM in a Vmware Workstation 12 Pro CentOS VM. Below are the steps I am following and where I stopped because don't know how to folow from there: Create the primary partition ...
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1answer
3k views

Is there a maximum 'anything' when running a high number of processes on Windows

I have a series of well optimised services written in house using .Net running on many 512GB RAM server (a mix of Xeons including E5-2697 V2 etc). Is there a maximum handle, process, thread count that ...
4
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1answer
2k views

Common back pressure strategies for services under sustained high load

I'm wondering what are the common backpressure strategies people use for their web services? Imagine your service operates under heavy load, and at some point the load reaches 120% of your capacity. ...
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3answers
10k views

Apache: “Server seems busy”, but lots of idle processes

I should note that I'm not a sysadmin. You'll figure that out very shortly. :) In a nutshell: Apache keeps taking a breather during heavy loads and all processes go idle. This is a polling server ...
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1answer
667 views

How can I find the cause of “Service temporarily unavailable” from apache2 on really small vm?

I just moved all my web applications to a really small vm (128 megs of memory) running linux xubuntu, with no GUI. Most of my applications run fine (if a bit slow, but that's acceptable) except for ...
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2answers
5k views

ZFS iSCSI and free capacity in VMFS

I use ZFS in FreeNAS 8.0.4 and use iSCSI to provide a LUN to Vmware ESXi 5.0. I post it at http://forums.freenas.org/showthread.php?10990-Memory-utilization-and-performance-problem/page4, but I ...
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3answers
6k views

Increasing a Linux partition once VM size increased in vSphere?

I have a Ubuntu 12.04 VM running on VMWares ESXi 5.1. The server (VM) itself has run out of space, the results of df -h are as follows: Filesystem Size Used Avail Use% Mounted on /dev/sda1 ...
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2answers
752 views

Can I have 2Gbit over 1Gbit Nics [closed]

So this really baffles me. Apparently because 1Gbit can transmit data in both directions simultaneously it should be possible to get 2Gbit of data transfer on a single NIC (1Gbit flow seend and 1Gbit ...
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1answer
259 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 out ...
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3answers
11k views

Can a 3ware 9500S-4LP controller use 3TB drives?

We have a Rackable Systems server used for backup storage. Recently we purchased a couple 3TB drives to expand the storage, but they are only showing a capacity of 746.52 GB as reported by 3ware's ...
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1answer
1k views

Capacity planning for an enterprise java application

If you had to do capacity planning and hardware sizing "BEFORE" you had a chance to actually code and test the application (typically while you are defining solution architecture), how would you do it?...
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3answers
2k views

Difference between FBWC capacities?

When buying a FBWC storage controller such as HP's P420, you can choose either a 512MB, 1G, or 2G capacity. What differences do these capacity sizes provide? Is there a metric I can use to choose ...
0
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1answer
101 views

Why would reducing capacity under load improve latency on a server?

In this talk at Berkeley, Jeff Dean's slides contain the following note, about a third of the way through the presentation: Non-intuitive: remove capacity under load to improve latency (?!) The ...
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2answers
282 views

Increasing capacity of RAID5 array [closed]

Assume that I built an 2TB RAID5 array and its running and some data is stored on it. Now I need to increase its size to 5TB. Can I increase capacity (By adding extra drives)? How? If Yes is it ...
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2answers
2k views

Cassandra: capacity planning [duplicate]

Im investigating moving some large DBs from MySQL to Cassandra and Im trying to figure out how to plan the cluster. Historically, one would just buy disks to contain the relevant data but Im not clear ...
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3answers
11k 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 ...
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2answers
325 views

Using all space on Amazon EC2 - Medium tier

I'm currently running an Amazon EC2 - Medium Tier reserved instance for hosting client websites. Recently it seems space is starting to run low on /dev/sda1 - so I thought I'd better prepare.. df -h ...
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1answer
50 views

Within IRIX : enumerate physical drives, and their capacity

I'd like to know what physical disk drives are attached to an IRIX system, and the capacity (or at least geometry) of each disk. I can get the former through hinv, but that doesn't include capacity/...
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2answers
2k views

How can I configure nginx to serve a “server overloaded” or out of capacity page?

I've got a client who's expecting a plug on national TV tonight, and they just told me (love how that works, eh?). I'm trying to do some capacity planning in what little time I have, and the one ...
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6answers
15k views

How do I find the system's disk capacity?

I run the command df -g to get the GB block sizes in the second column (left to right). If I want to get the total capacity for all hard disks, which command should I use? OS is AIX.
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2answers
282 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 ...
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2answers
1k views

NetApp Usable Capacity Magic

I'd like to know the exact math of how to calculate usable capacity on a NetApp filer's aggregates. Out of experience I've been using a magic factor of 0.65-0,7 times the net RG capacity of all the ...
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2answers
663 views

identical load balanced VM's on same host

Howdy cowboys and cowgirls, If I have a VM (either KVM or ESXi) serving static content on Apache and a video streaming webapp on Tomcat, is there a logic in running multiple instances on the same VM ...
3
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2answers
296 views

How would I show a static “over capacity” page in IIS?

I'm launching a new site soon and I expect it to make it into mainstream media. At this point, I'm not sure our server will be able to handle all of the requests. Is there a way that I can detect the ...
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1answer
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Why do ticket websites crash?

I hope this fits into the expanse of serverfault. Apologies if it doesn't. Why do ticket websites selling tickets for major concerts/events still crash when they make the tickets available? Surely, ...
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10answers
22k views

How does one find which files are taking up 80% of the space on a Linux webserver?

The drive is constantly filling up. You've hunted down all the spare and random files you can. grep'd for coredump files and even removed some of the un-needed backups... What would be your next move....
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2answers
5k views

Maximum size of an indexing service catalog

Does anyone know what the maximum size on an indexing service index is on Windows 2008? We are having all sorts of problems with the index hanging and not processing new documents. I just deleted ...
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10answers
24k views

Where to purchase a server capable of 512GB of RAM? [closed]

Where can I purchase a single server capable of 512 GB, yes GB, of RAM? The most I've seen is 256 GB (32 DIMM x 8 GB per stick)
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4answers
444 views

Apache Load [closed]

Am planning to run a chat script on my Apache server and it uses polling every second to receive messages. I know about Comet etc, but I do not want to use them at the current time. I am wondering if ...
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5answers
8k views

How does a 32-bit machine support more than 4 GB of RAM?

I have always wondered about this and never totally understood how 32 bit machines are addressing more than 4 GB of RAM. I mean, there are no more address lines left, correct? I know even in our ...