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• How can I get the size of an Amazon S3 bucket?

  - by Garret Heaton

  I'd like to graph the size (in bytes, and # of items) of an Amazon S3 bucket and am looking for an efficient way to get the data. The s3cmd tools provide a way to get the total file size using s3cmd du s3://bucket_name, but I'm worried about its ability to scale since it looks like it fetches data about every file and calculates its own sum. Since Amazon charges users in GB-Months it seems odd that they don't expose this value directly. Although Amazon's REST API returns the number of items in a bucket, [s3cmd] doesn't seem to expose it. I could do s3cmd ls -r s3://bucket_name | wc -l but that seems like a hack. The Ruby AWS::S3 library looked promising, but only provides the # of bucket items, not the total bucket size. Is anyone aware of any other command line tools or libraries (prefer Perl, PHP, Python, or Ruby) which provide ways of getting this data?

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• How do I configure a guest VM's static IP address automatically in Citrix XenServer?

  - by Kev

  To facilitate automation of guest VM provisioning, how do I set (in a script) the IP address on a guest VM's NIC (or NIC's) once a new VM has booted? Is there a way to "inject" netsh commands via the Citrix guest OS tools (for Windows for example) once the host has started? Or can this be done via the Citrix API/SDK or the xe tools? These are windows 2008 servers that have been sysprep'd so when the boot for the first time they have no IP address.

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• latency, regular alternations. Pfsense, network

  - by Tillebeck

  Any idea why grapgh is a shown? It i two pfsense boxes and I have not looked into where they ping to and if it is related to the server they ping. Trafic graphs are following a normal 24 hour cycle and not related to either of the latency graphs Img1: High frequent ulteration in latency. Just started a few days back. Peaks are not perfectly regular but varies from 40min to 1hour Img2: This is a different router on another internet connection. Most of our routers shown this kind of latency graphs - so for our setup it is "normal". Please note that second graph is for a whole week and not just some hours

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• itunes 9 on mac skips during play

  - by thethinman

  Since upgrading to itunes 9 certain songs are ok but other songs skip during play. I tried downgrading to itunes 8 but to no avail. I've tried other music players and some have the same problem and some don't so I think the problem is not with itunes but with the music api. Any ideas? Thanks.

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• Downloading source via bazaar

  - by beanaroo

  Forgive me if this is a stupid question or an inapproptiate place to ask. This is my first time attempting to download source by means of bazaar (launchpad). Regardless of the package or branch... I always get an error like the following: bzr: ERROR: Revision {[email protected]} not present in "Graph(StackedParentsProvider(bzrlib.repository._LazyListJoin(([CachingParentsProvider(None)], []))))". I have looked all over and cannot find an answer. What does this mean? How can I resolve it? Many thanks. ---edit--- Ubuntu 12.10 running BZR-2.6.0Commands include but are not limited to: bzr branch lp:ubuntu/quantal-proposed/ubiquity bzr branch lp:ubuntu/quantal/ubiquity bzr branch lp:ubuntu/quantal/ubiquity-slideshow-ubuntu bzr branch lp:nano (just to test) bzr branch lp:ubuntu/quantal/transmission (just to test)

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• nginx errors: upstream timed out (110: Connection timed out)

  - by Sparsh Gupta

  Hi, I have a nginx server with 5 backend servers. We serve around 400-500 requests/second. I have started getting a large number of Upstream Timed out errors (110: Connection timed out) Error string in error.log looks like 2011/01/10 21:59:46 [error] 1153#0: *1699246778 upstream timed out (110: Connection timed out) while reading response header from upstream, client: {IP}, server: {domain}, request: "GET {URL} HTTP/1.1", upstream: "http://{backend_server}:80/{url}", host: "{domain}", referrer: "{referrer}" Any suggestions how to debug such errors. I am unable to find a munin plugin to keep a check on number of upstream errors. Sometime the number of errors per day is way too high and somedays its a more decent 3 digit number. A munin graph would probably help us finding out any pattern or correlation with anything else How can we make the number of such error as ZERO

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• Windows Desktop Switchboard / Toolbar

  - by codex73

  I'm researching a way to provide a somewhat custom toolbox, widget or switchboard which will reside on users desktop visible at most times for easy access to resources. Resources could be websites, local computer applications, custom api, etc. Compatibility should be Windows XP, 2008 Server, 7, Vista. Unsure if I should custom build an application with Visual Studio, Customize a Open Source Package or what could be a good simple implementation. Any advice or comments on this will be greatly appreciated.

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• Is there some file browser that uses low level functions to browse hard disk?

  - by watbywbarif

  I have Windows 7, NTFS hard disk. I have detected rootkit files but can't delete them through Windows explorer, obviously because they are not visible. Is there some other file browser that is using low level function calls, lower that win api, so that I can try to see and study these files before removal. I know the exact locations. I know that I can load some live CD and delete them, but I wonder about the first possible solution.

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• Debug unstable Apache server under Debian

  - by almo

  Since yesterday my Apache server that runs on a Debian machine runs very unstable. Sometiems my websites load and sometimes not. I think it has to do with the memory since my Apache log is full of Out of memory (allocated 262144) (tried to allocate 4480 bytes). I also attached a screenshot of the memory graph. A server restart resolves the problem temporarily. I looked at the processes that are using memory but the biggest one is MySQL with 6.5%. Where else can look for the problem? Edit: I did a free -m right after rebooting and one about 2 hours later. I think the trend is visible: root@xxx:~# free -m total used free shared buffers cached Mem: 4016 731 3284 0 80 200 -/+ buffers/cache: 449 3566 Swap: 459 0 459 root@xxx:~# free -m total used free shared buffers cached Mem: 4016 2466 1550 0 92 473 -/+ buffers/cache: 1900 2115 Swap: 459 0 459

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• How to plot 3D graphs in Excel from CSV data?

  - by Primx

  I have data formatted like this in a csv file: a, 1, 4, 6.0 a, 2, 42, 16.0 a, 5, 14, 69.3 a, 11, 4, 7.0 b, 1, 45, 6.0 b, 2, 45, 1.9 b, 9, 2, 4.4 b, 11, 4, 7.9 lines with first parameter a is one set of data, and first parameter b represents another set. My aim is to plot two lines on the same graph, one with points (1, 4, 6.0), (2, 42, 16.0), (5, 14, 69.3), (11, 4, 7.0) and the other with points (1, 45, 6.0), (2, 45, 1.9), (9, 2, 4.4), (11, 4, 7.9) I am able to import the data directly in MS Excel, but am not sure how to plot them. How can I plot this data?

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• Compiling PHP with cURL and SSL support on Redhat EC5

  - by Kevin Sedgley

  I don't even know where to begin to be honest. Trying to use an external API that requires SSL connections, I discover that SSL in needed on cURL, but this (apparently) requires PHP to be reinstalled and compiled with cURL / SSL support. Not really experienced with compiling PHP, and I'm not sure if our server even has make or build, the only luck I've had is with rpm's before. This really isn't in my job description. Any help most most welcome!

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• Easy to use booking software?

  - by drozzy

  Looking for an easy to use B&B booking software that will allow the owner to schedule and rent rooms. It would ideally have a windows client (with cloud sync) and thinking mobile app for reminders and such. Calendar with automatic scheduling of some sort would be great too. Anyone heard of something along these lines? If not - any suggestions of API's or services that one could start with to roll their own solution?

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• Nagios and rrd on a old server

  - by Pier

  I have an old server (P4 based) on which nagios (and all the other tools to monitor) is running. In the last few weeks we are seeing a strange behavior. In the /var/spool/pnp4nagios (where temporary files are stored before getting processed by pnp4nagios daemon) we have many files like perfdata.1274949941-PID-18839 and we get an error in npcd.log: [05-27-2010 11:17:46] NPCD: ThreadCounter 0/15 File is perfdata.1274951306-PID-27849 [05-27-2010 11:17:46] NPCD: File 'perfdata.1274951306-PID-27849' is an already in process PNP file. Leaving it untouched. Sometimes some graph are not drawn. The server is pretty loaded (around 5-6 normally) and i suspect that npcd goes in timeout and leave those files behind. What could I do (apart from change the server)? Few infos about the system: centos 5.5 nagios 3.2.1 pnp4nagios 0.6 (from sources) Thanks

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• Looking for an open source real-time network analysis program

  - by JrSysAdmin

  Can somebody recommend an open source real-time network analysis program? What I'm looking for the program to do is display a graph of bandwidth usage by IP within our internal network that can quickly be viewed any time we need to (typically when we want to quickly find out who is utilizing high amounts of bandwidth and slowing down the network). We ideally simply want to hook up a monitor on the wall of our server room to a system whose NIC will be in permissive mode to log all network activity in a visual manner which can easily be seen and running 24/7. Prefer open source as I do not have a budget for this project and prefer open source projects in general. I'd also prefer for this to be available for CentOS but any linux distro or Windows OS would be acceptable. Thanks!

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• Tools for tracking disk usage

  - by Carey

  I manage a number of linux fileservers. These all run applications written from 0-10 years ago. As sometimes happens, a machine will come close to, or run out of disk space. Reasons include applications not rotating log files, a machine with 500GB of disk producing 150GB of new files every month that were not written to tape, databases gradually increasing in size, people doing silly things...generally a bit of chaos. Anyway, when a machine unexpectedly goes from 50% to 100% full in a couple of hours, I figure out what broke (lots of "du") and delete files or contact someone. I also can look at cacti graphs to figure out what the machine's normal disk usage is (e.g. for /home). Does anyone know of any tools that will give finer grained information on historial usage than a cacti/RRD graph? Like "/home/abc/xyz increased 50GB in the last day".

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• what does the 'm' unit in munin mean?

  - by nbv4

  I'm using munin as a tool for monitoring my servers. On some of the graphs, the units are marked with a 'm'. For instance, my apache accesses graph is labeled 100m, 200m, 300m, along the y-axis. What does the 'm' mean? I understand 'M' (caps) is mega as in megabytes, the 'k' is kilo, the 'G' is giga, but what about 'm'? At first I thought it was million, but theres no way apache is serving 100 million accesses even per decade.

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• Windows 2008 R2 on ESXi 4.1 cpu utilization kernel high

  - by MK.

  I have a Win2k8 guest running on ESXi 4.1. The host has 12 cores and the problem happens even if the guest is the only VM on the host. We have 4 cores dedicated to the guest. We noticed that network starts chocking when the CPU load goes up. After some testing we noticed that when running a simple CPU hogging tool set up to run 3 threads at 100% the regular CPU load goes to 75% like it should and the "kernel times" graph in task manager goes up to 25%. My intuition tells me that the network problem and kernel times problem are the same. This is confirmed by another similar VM we created on the same host which doesn't have either of the problems. VMWare tools are obviously installed. The nic is e1000. What else can we do to troubleshoot this?

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• How to find out the dependency paths?

  - by ???

  For example, there are packages and their dependencies: a -> b (a require b) b -> c & d x -> a y -> x z -> x z -> x & y Now, give c and z, there are two dependency paths: z -> x -> a -> b -> c z -> y -> x -> a -> b -> c The question is how to find out the dependency paths between two specific Debian packages? P.S. The idea behind is to draw the dependency graph for a given set of packages, include the intermediate ones missing in the chain.

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• How to reliably map vSphere disks <-> Linux devices

  - by brianmcgee

  Task at hand After a virtual disk has been added to a Linux VM on vSphere 5, we need to identify the disks in order to automate the LVM storage provision. The virtual disks may reside on different datastores (e.g. sas or flash) and although they may be of the same size, their speed may vary. So I need a method to map the vSphere disks to Linux devices. Ideas Through the vSphere API, I am able to get the device info: Data Object Type: VirtualDiskFlatVer2BackingInfo Parent Managed Object ID: vm-230 Property Path: config.hardware.device[2000].backing Properties Name Type Value ChangeId string Unset contentId string "d58ec8c12486ea55c6f6d913642e1801" datastore ManagedObjectReference:Datastore datastore-216 (W5-CFAS012-Hybrid-CL20-004) deltaDiskFormat string "redoLogFormat" deltaGrainSize int Unset digestEnabled boolean false diskMode string "persistent" dynamicProperty DynamicProperty[] Unset dynamicType string Unset eagerlyScrub boolean Unset fileName string "[W5-CFAS012-Hybrid-CL20-004] l****9-000001.vmdk" parent VirtualDiskFlatVer2BackingInfo parent split boolean false thinProvisioned boolean false uuid string "6000C295-ab45-704e-9497-b25d2ba8dc00" writeThrough boolean false And on Linux I may read the uuid strings: [root@lx***** ~]# lsscsi -t [1:0:0:0] cd/dvd ata: /dev/sr0 [2:0:0:0] disk sas:0x5000c295ab45704e /dev/sda [3:0:0:0] disk sas:0x5000c2932dfa693f /dev/sdb [3:0:1:0] disk sas:0x5000c29dcd64314a /dev/sdc As you can see, the uuid string of disk /dev/sda looks somehow familiar to the string that is visible in the VMware API. Only the first hex digit is different (5 vs. 6) and it is only present to the third hyphen. So this looks promising... Alternative idea Select disks by controller. But is it reliable that the ascending SCSI Id also matches the next vSphere virtual disk? What happens if I add another DVD-ROM drive / USB Thumb drive? This will probably introduce new SCSI devices in between. Thats the cause why I think I will discard this idea. Questions Does someone know an easier method to map vSphere disks and Linux devices? Can someone explain the differences in the uuid strings? (I think this has something to do with SAS adressing initiator and target... WWN like...) May I reliably map devices by using those uuid strings? How about SCSI virtual disks? There is no uuid visible then... This task seems to be so obvious. Why doesn't Vmware think about this and simply add a way to query the disk mapping via Vmware Tools?

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• In Excel, how to group data by date, and then do operations on the data?

  - by Bicou

  Hi, I have Excel 2003. My data is like this: 01/10/2010 0.99 02/10/2010 1.49 02/10/2010 0.99 02/10/2010 0.99 02/10/2010 0.99 03/10/2010 1.49 03/10/2010 1.49 03/10/2010 0.99 etc. In fact it is a list of sales every day. I want to have something like this: 01/10/2010 0.99 02/10/2010 4.46 03/10/2010 3.97 I want to group by date, and sum the column B. I'd like to see the evolution of the sales over time, and display a nice graph about that. I have managed to create pivot tables that almost do the job: they list the number of 0.99 and 1.49 each day, but I can't find a way to simply sum everything and group by date. Thanks for reading.

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• How to Track CPU and Memory Usage Per Process

  - by Mjsk

  I have seen this question asked on here before but was unable to follow the answer which was given. I would like to monitor a processes CPU, Memory, and possibly GPU usage over a given time. The data would be useful if presented in a graph. It would be nice if I could do this using Performance Monitor, but I am open to alternative solutions as well. I have tried using Performance Monitor and my problem is that I'm not sure which performance counters to use since there are so many. I've been looking at a Process, Processor, Memory, etc. but I'm not sure which counters within those categories will be of interest to me. My OS is Windows 7.

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• How to make a dropdown list such that... (see details)

  - by daysandtimes

  I want to plot the stock prices of certain companies VS the S&P500. I have all the price data downloaded in my excel sheet already. I want to create a line graph in Excel. One line is fixed and that would be the S&P500, and the other would be the company I select. I know how to use data validation to create a dropdown list, but how could I make it in such a way that when I select company A, I would only see company A's price data but not company B, C, etc. Then when I select company B, I would only see company B's price data & the S&P price data. And so on. The S&P line will be visible all the time, but the various company's price line will only appear if it is selected. Is there any easy way to normalize all sets of data in a way such that the starting point is always 100?

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• When and how often to start connection to database in php?

  - by AndHeiberg

  When and how often is it good practice to start the connection to your database in php? I'm new to databases, and I'm wondering when I should start by database connection. I'm creating a api with an index, controllers and model. Should I start the connection in the index and then pass it to all the other files, start the connection at the top of all files and call it as a global in functions as needed or start and end the connection in every function?

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• Can I determine a machine's outward facing IP with PHP without relying on external services?

  - by editor

  I'm working with an API that requires the machine's external IP. As far as I know, the PHP environment I'm using can only get our internal IP. The option on the table is using an external service such as whatismyip.com to tell us: wget -q -O - http://whatismyip.com/automation/n09230945.asp My concern is what happens if that fails. Is there a bulletproof way of determining a machine's IP without relying on external services?

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• Apache with mod_perl eating memory when idle

  - by syneticon-dj

  An Apache webserver running a mod_perl application is exposing abnormal memory usage - after the "day load" ceases, the system's memory is being exhausted by the Apache processes and oom_killer is being invoked. As the load returns the following morning, the memory usage normalizes - probably because Apache workers get recycled periodically if a sufficient number of hits is generated: This is the graph for apache hits per second to correlate: The remaining 2 hits per second throughout the night are induced by HAProxy checks - it runs HEAD http://mydomain.example.com/running HTTP/1.0 requests against the server every half a second with "running" being a static file (i.e. not invoking any perl code). It also seems that disabling these checks remedies the memory usage problem, but obviously cannot be a solution. All of 3 similarly configured servers (behind HAProxy) expose this behavior. The running OS is Ubuntu 10.10, Apache version 2.2.16. This seems to be a memory leak but I have no idea how to start debugging it - any hints?

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