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• Auto load balancing two node Cluster Hyper-v 2008 R2 enterprise?

  - by Kristofer O

  My setup is a 2 node cluster with 72GB ram each and a ~10TB MD3000i Iscsi SAN. I have about 30VMs running I keep about 15 on either server. I do a live migration to the other server if I need to run updates or whatever... Either one of the servers is able of running all VM if needed, but the cpu is pretty high. Here's my issues. I know Hyper-v has a limit of a single Live-migration at a time. But Why doesn't it queue them up to move one at a time? If I multi select I don't get the option to live migrate a one at a time. OR if I'm in the process of Migrating one it will give me an error that it's currently migrating a VM... Is there a button I missed that will tell a Node that it needs to migrate all the VMs elsewhere? Another question, does anyone know whats the best way to load balance VMs based on CPU and/or network utilzation. I have some VMs that don't do much. and some that trash the CPU or network. I'd like to balance it out on both servers if at all possible. and Is there any way to automate it? last question... If I overcommit my Cluster is there a way to tell the cluster that I want certian VMs the be running and to savestate other VMs based on availible system resources? Say when my one node blue screens and the other node begins starting the VMs up. I want the unimportant ones to shutdown or savestate so the important ones can stay running or come back online. Thanks just for reading all that. Any help would be great.

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• How to stop Excel 2003 from loading a Gazillion files

  - by Gary M. Mugford

  One of my soon-to-be-ex-friends got an Excel file from another friend of his and decided to click on it. It started opening all kinds of files from within Excel. Over 200 and still counting when he called me. I told him to go to task manager, which showed a LOT of files in the applications tab, but only one Excel.exe in the processes tab. Closing it down there, closed down Excel. I then CrossLooped in to see if I could give him a helping hand. Each time Excel was re-opened, the mass influx of files started. They were all kinds of files, PDFs, Docs, JPGs, even some spreadsheets. It looked like the end of solitaire, with multiple windows opening (XP) and the counter on the lone Excel button on the task bar counting off the files. I did the task manager exit routine and went looking for temp files. I CrapCleaned out the system. Made sure I went through the files created in the last hour and deleted anything with a temp anywhere in it. I also deleted the crappy infected/corrupted file from it's place on the desktop (yeah, I know, I yelled for 15 minutes on THAT subject). Despite a delousing, the restart of Excel, which complained of a deactivated add-in, would start the cascading windows, whether I answered yes or no to that question. Yes, it knew it had a serious crash, but why would it just keep on trying to load the bad file, even when I got rid of it? But here's the real question. WHERE was it loading from? I went through the backup folder and NOTHING was there! So what's the process for starting Excel WITHOUT it trying to do a crash recovery? Sort of makes me feel stupid at times. Thanks for any light you can shed on this issue. GM

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• Advice on migrating from a Samba PDC

  - by pgb

  When we started our software development company, we decided to use Samba as a PDC for the few Windows workstations we had. We use Samba with OpenLDAP, and it has been a good replacement for AD for almost 6 years now (using Windows XP workstations). Now I'm facing a few problems with our setup: The Linux server where the PDC runs is very outdated (and is a Gentoo install, don't ask why!) We started using Windows 7 on some of the workstations, and these can't join the Samba domain (there's a workaround, I know) Our company has grown a bit, and we have now about 20 workstations (and plan to have more in the near future). I have to reinstall our PDC, and was thinking on updating to another Linux distro and the latest Samba 3.4. However, I started having second thoughts, and now I think going to a Windows Server for the PDC is the way to go. The main drivers to opt for a Windows Server would be its easy administration and the ability to use Windows 7 out of the box, without any registry hacks. My question(s) then is(are): How should I do this migration? Can I keep the same domain name? What will happen to the users? Will they be recreated and won't be identified by the workstations as being the same user, even if the actual username is the same? What steps would you recommend me to migrate from Samba to Windows Server? Bonus question: If you think staying in Samba is the way to go with my current setup, I'm also interested on your thoughts.

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• How can I filter /var/adm/wtmpx on Solaris 10?

  - by Yanick Girouard

  Some of our Solaris 10 servers are monitored using SiteScope, which uses Telnet to probe certain ports (SSH is one of them) every few minutes. This is creating an insane amount of lines in /var/adm/wtmpx, and eventually make it so big (2,5G+) that we can no longer run the last command, or that the uptime command is unable to accurately show the true uptime of the server. The error we get when trying to run the last command is this: /var/adm/wtmpx: Value too large for defined data type I have found ways we can clean this accounting log using a cron job (with the command /usr/lib/acct/fwtmp), and this works. This is not the issue. I was wondering if there would be a way to simply prevent connections from the monitoring user (in our case, user monsite) from creating entries in this accounting log at all. Is this possible, and if so, how can I do it? I've looked around and searched Google for a while, but couldn't find an answer to this question. NOTE: We are very well aware that the monitoring solution we employ is perhaps not the best one, but we cannot change it at this time. Therefore, suggesting that we change it is not pertinent to this question. If you want to read more on the Sitescope monitoring solution we employ for those servers, please see its documentation here and look for Port Monitor, and Connecting to remote UNIX servers, which explains how it works.

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• SAN performance issues storing SQL Server tempdb on a SAN that's being backed up

  - by user42724

  I'm afraid I don't know much about SAN's so please forgive my lack of detail or technical terms. As a developer I've just completed and put on an existing production system a new application but it would appear to have tipped the scales regarding the performance of the backups being taken from the SAN. As I understand it there's a mirror of the SAN being taken usually constantly at the block-level. However, there seem to be so many new writes to the disk that the SAN mirroring/backup process can no longer keep up. I believe I've narrowed this down to SQL Servers tempdb which exists on a drive that contributes the largest portion of the problem! In fact I think tempdb has be contributing the largest portion of the issues all along regardless of my application! My question therefore is whether the tempdb should ever be mirrored or backed on the SAN and whether anyone else has gone through this sort of pain already? I'm wondering whether it's a best practise to make sure that tempdb is never mirrored on a SAN simply because any writes to it don't need to be saved. This also raises a slightly connected question - is it better to rely on SQL Servers built-in database backups tools (DB in full-recovery mode with full/differential and transaction log backups) or, as is the case with our application, SQL server is in simple recovery mode and never backed up since the SAN is mirrored and backed up? Many thanks

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• 'pskill \\hostname winlogon' might budge a server "stuck rebooting", but why?

  - by Snoi

  Question: Executing remote (Sysinternals) command... pskill \\machine winlogon ...can budge a server that is stuck rebooting, but how/why does this work? How do you know which service to kill? To recreate (e.g.): You run Windows Update, allow a reboot, and ...NOTHING! RDP gets cut off but the server does not reboot. Just about every other service seems to stay up. Further Background: I've faced this problem on VMs hosted around the planet for some years, and used various sc.exe and shutdown commands to learn the state of and attempt remote reboot of servers in such a state, with limited success. Most datacentres don't offer any way to see the true console or power off/on such machines. They charge $$ for you to call them to do such simple things after hours, when you nearly always have to run your maint tasks. e.g. NET USE \\machine\IPC$ /USER:login password sc \\machine query RpcSs sc \\machine query TermService sc \\machine query wuauserv tasklist /s machine This occasionally works for me... shutdown /m \\machine /r /f /t: 0 ...but more often than not it fails with: A system shutdown is in progress (1115). I found this question, and the answer by @Tweek, and it worked really well, but was I just lucky? Can not RDP to Win 2003 box or initiate remote restart @Tweek said to run: pskill \\hostname winlogon ...and that got me past this situation in a new way (Server 2008 R2 in my most recent case) - really useful! I just need to understand if I got lucky or there is more science here. What I'd like to know is why the winlogon process? @Livne said to use "tasklist /s HostName" to see what is the culprit, but how do you tell from the listed output? It's just a list of running tasks etc. From that I would not know what to look for, nor could I see anything about the winlogon process that suggested to my eyes that was the one to kill.

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• Login box not shown on Ubuntu

  - by Alexandre

  I've installed Ubuntu 10.04 (64bit) as a guest OS in VirtualBox, using Windows7 Professional (64bit) as host. After Ubuntu install, I did installed Xfce4 (sudo apt-get install xfce4). Logged in using a Xfce session, and when I logged out, I couldn't see the login box anymore, only the regular gnome background from login screen. Then I restarted the virtual machine, and now I'm not able to see the login box anymore, only the gnome background. Does someone knows how to solve this? Thanks in advance Update: I've tried to use Xubuntu, that comes with Xfce. And I'm facing the same problem. As a common denominator from the two cases, now I see the problem arises after I've updated the system, and then installed curl (via apt-get), zlib (make process), git (make process). But I'm not sure this can be the cause for this ... Update: I isolated the problem. The bad guy is zlib, but I don't have a clue why. In fact, it does crash not only ubuntu and xubuntu, but also Debian (Yes, I've tested all). I'll keep this question in case someone have the same problem, but I think my initial question is not valid anymore.

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• RDS, RDWeb, and RemoteApp: How to use public certificate for launching apps on session host?

  - by Bret Fisher

  Question: How do i tell RDWeb to launch apps from remote.domain.com rather then host.internaldomain.local? Environment: Existing org with AD forest. New single Server 2012 running all Remote Desktop Services roles for session host. Used the new 2012 wizard to setup "QuickSessionCollection" with roles: RD Session Host RD Connection Broker RD Gateway RD Web Access RD Licensing Everything works with self-signed cert, but we want to prevent those. The users are potentially non-domain machines so sticking a private root cert for on their machines isn't an option. Every part of the solution needs to use public cert. Added public remote.domain.com cert to all roles using Server Manager GUI: RD Connection Broker - Enable Single Sign On RD Connection Broker - Publishing RD Web Access RD Gateway So now everything works beautifully except the last step: user logs into https://remote.domain.com user clicks a app icon, which in background downloads a .rdp file that is signed by remote.domain.com. .rdp is set to use RD Gateway, which is remote.domain.com .rdp says app is hosted on internal host.internaldomain.local, which doesn't match the RDP-tcp TLS cert of remote.domain.com, and pops a warning. It's this last step that I'd like to fix. Is there a config option in PowerShell, WMI, or .config to tell RDWeb/RemoteApp to use remote.domain.com for all published apps so the TLS cert for RDP matches what the Session Host is using? NOTE: This question talks about this issue, and this answer mentions how you might fix it in 2008, but that GUI doesn't exist in 2012 for RemoteApp, and I can't find a PowerShell setting for it. NOTE: Here's a screenshot of the setting in 2008R2 that I need to change. It tells RemoteApp what to use for the Session Host server name. How can I set that in 2012?

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• mdadm+zfs vs mdadm+lvm

  - by Alex

  This may be a naive question since I'm new to this and I cannot find any results about mdadm+zfs, but after some testing it seems it might work: The use case is a server with RAID6 for some data that is backed-up somewhat infrequently. I think I'm well served by any of ZFS or RAID6. Platform is Linux. Performance is secondary. So the two setups I am considering are: A RAID6 array plus regular LVM and ext4 A RAID6 array plus ZFS (without redundancy). Is this second option that I don't see discussed at all. Why ZFS+RAID6? It's mainly because the inability of ZFS to grow a raidz2 with new disks. You can replace disks with larger ones, I know, but not add another disk. You can accomplish 2-disk redundancy and ZFS disk growth using mdadm as the redundancy layer. Besides that main point (otherwise I could go directly to raidz2 without RAID under it), these are the pros-cons that I see for each option: ZFS has snapshots without preallocated space. LVM requires preallocation (might be no longer true). ZFS has checksumming (very interested in this) and compression (nice bonus). LVM has online filesystem growth (ZFS can do it offline with export/mdadm --grow/import). LVM has encryption (ZFS-on-Linux has not). This is the only major con of this combo I see. I guess I could go RAID6+LVM+ZFS... seems too heavy, or not? So, to close with a proper question: 1) Is there anything that inherently discourages or precludes RAID6+ZFS? Anyone has experience with a setup like this? 2) Are there possibilities for checksumming and compression that would make ZFS unnecessary (maintaining the possibility of filesystem growth)? Because the RAID6+LVM combo seems the sanctioned, tested way.

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• Outlook 2007 / 2010 Calendar: hide meetings in specific category

  - by Jeroen

  Question Is there any easy way in Outlook 2007/2010 to show/hide meetings in a specific category? Preferably only for a specific view (the Month view, in this case). Note: I was almost done writing this question, adding just one more "What I've tried" option, when I found an acceptable (though imperfect) solution. Remembering this SE blog post I figured I might as well post it after all and answer it myself. And who knows, perhaps someone else has a more elegant solution. The reason for me personally is that I'd like to hide the "small, recurring meetings" like our daily stand-up meeting in the month view. I'd prefer an Outlook feature that is meant for this (there must be one for this, right?), but I'm open to workarounds or plugin suggestions as well. What I expected to find somewhere was a list of categories (with added option "No category") where you could select/deselect from which categories you'd see meetings. Something like this mock-up: What I've tried Edit "View Settings", and use a "Filter..." on categories. This has several disadvantages, the major one is that the filter only allows me to choose what I want to show, but not what I want to hide. Even if I tick all categories but one for the filter it would still hide any uncategorized meeting. Similar to 1, but then using Advanced filters. Still a bit clumsy as changing views can be up to three clicks, but this is the best solution so far (see the corresponding answer below). Creating a sub-calendar for these "small" meetings that I wish to hide. This felt a bit clumsy and like overkill, but did provide an easy "select/deselect" option to show/hide these meetings. Search for plug-ins that do this. Couldn't find one (yet).

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• When I log on to my company desktop, I log on to a domain. How is this domain name installed?

  - by learnerforever

  Hi, When I have to work on my machine in company, I have noticed that I log on to a domain (named on the basis of company name) and not really on that computer. From, what I understand, this has a few advantages, the primary being that I just need one password for the domain and can work through any of the machines in company. My questions are : What software on desktop/network have to be installed so that the desktop recognizes and gives me option of logging into a domain. I would guess that a software can be installed on desktop, and there we can configure the IP address of domain server of company and port number, which handles authentication. Is this correct? This takes me to another question that how are softwares installed on end machines in a company. Going to each machine physically and installing looks very unweildy from administrator point of view. An obvious solution would be to install softwares (and updates) over network. My question on this are: What protocols,keywords come into picture when administrator installs OS,softwares,updates from his administrator machine to end machine through network. Thanks,

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• So Close: How to get this SSH login working (.bashrc)

  - by This_Is_Fun

  Objective: SSH login ( + eliminate warning message) / run 2 commands / stay logged in: EDIT: Oops, I made a mistake (see below): This code does ~95% of what I wanted to do # .bashrc # Run two commands and stay logged in to new server. alias gr='ssh -t -p 5xx4x [email protected] 2> /dev/null "cd /var; ls; /bin/bash -i"' Now, after successful login / verify user logged in = root pts/0 2011-01-30 22:09 Try to 'logout' = bash: logout: not login shell: use `exit' I seem to have full root access w/o being logged into the shell? (The " /bin/bash -i " was added to 'Stay logged in' but doesn't work quite as expected) FYI: The question is "How to get this SSH login working" & it is mostly solved, sorry I made a mess... ... .. . Original Question Here: # .bashrc # Run two commands and stay logged in to new server. alias gr='ssh -t -p 5xx4x [email protected] "cd /var; ls; /bin/bash -i"' # (hack) Hide "map back to the address - POSSIBLE BREAK-IN ATTEMPT!" message. alias gr='ssh -p 5xx4x [email protected] 2> /dev/null' Both examples 'work' as shown; When I try to add the ' 2 /dev/null ' to the first example, then the whole thing breaks. I'm out of time trying to solve the warning message other ways, so is it possible to combine both examples to make example #1 work w/o the warning message? Thank you. ps. If you also know a proper way to kill the login warning message, please do tell (the 'standard' "edit host file" advice isn't working for me)

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• Application losing Printer within Terminal Services for remote users

  - by Richard

  Question: What I need to do is have a permanent link to a printer, normally only accessible through Terminal Services (Printer Redirect), to allow Sage Line 50 layouts to see that printer persistently, even after users have disconnected and reconnected to the Terminal Services session? Although the printer is accessible each time a user connects to the Sage Server via Terminal Services, it is given a different session number and therefore the Sage Layout sees it as a different printer. History behind question: Users using Terminal Services connecting to a Sage Server on a different site Using Sage Line 50 v 15 on that Server Users want to print invoices (sage layouts) locally Sage Server cannot see the users local printers, to get around this user uses the Print redirect features of Terminal Services The individual reports can be edited to point to a specific printer by default. This means the user just has to select an invoice and click print, then select the layout/report wanted and it auto prints that invoice to the default printer specified. The problem occurs because the layouts are edited to point to the users local printer "Ricoh 1018d (session#)", note the "(session#)" as this is the users local printer being redirected through the terminal services session. Users are able to print using the sage layouts once the default printer is setup within the layout and saved, but as soon as the users disconnects from the Terminal Services session and then reconnect in the morning go to print, it has lost the connection to that printer. I understand why its failed, because that the printer is on a per session basis and the layout would not be able to hold on to the connection from a previous session. Thanks in advance for any assistance...

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• Oracle with Kerberos authentication and Windows 2003 Server as KDC

  - by Supaplex

  I am running Oracle 10.2 on a Windows 2003 Server SP2 which is also the domain controller on the network. I wish to switch authentication method from NTS to Kerberos. I have spent a lot of time trying to configure Oracle with Kerberos authentication from the Oracle Advanced Security option from the Net Manager utility. I have disabled NTS so Kerberos is promoted as the preferred authentication method. But as soon as the configuration is saved from Net Manager and I restart the Oracle server service, Oracle will not start. I don't know what Oracle is complaining about, because I don't know where to look for the Oracle error log. My first question is: how can I figure out what's bugging Oracle? My second question: is there a good tutorial for setting up Oracle on a Windows 2003 with Kerberos Authentication, where the Windows 2003 Server is the KDC? Maybe there is a book I can get? I have read Oracles own guide, but it is mostly for Linux/Unix. Thanks a lot!

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• Xen dom0 reports incorrect amount of RAM with dom0_mem set

  - by xen_amnesiac

  I've done a fair bit of searching about this, but have found nothing that answers my question. I have a system with 6GB of RAM which acts as a Xen server. For reference, it runs Ubuntu 12.04. I've set the kernel parameter dom0_mem:512M,max:512M in /etc/default/grub as follows: GRUB_CMDLINE_XEN_DEFAULT="dom0_mem=min:512M,max:512M" I've tried variations of that, with the same result. My question is this: With the above set, the dom0 reports in all applications a RAM amount of 422M. cat /proc/meminfo gives the following: $ cat /proc/meminfo MemTotal: 432472 kB MemFree: 54144 kB Buffers: 17640 kB Cached: 220104 kB SwapCached: 30172 kB Active: 136500 kB Inactive: 167780 kB Active(anon): 6156 kB Inactive(anon): 60516 kB Active(file): 130344 kB Inactive(file): 107264 kB Unevictable: 52 kB Mlocked: 52 kB SwapTotal: 1794044 kB SwapFree: 1682012 kB Dirty: 0 kB Writeback: 0 kB AnonPages: 39572 kB Mapped: 8048 kB Shmem: 136 kB Slab: 44324 kB SReclaimable: 22012 kB SUnreclaim: 22312 kB KernelStack: 1280 kB PageTables: 3840 kB NFS_Unstable: 0 kB Bounce: 0 kB WritebackTmp: 0 kB CommitLimit: 2010280 kB Committed_AS: 329192 kB VmallocTotal: 34359738367 kB VmallocUsed: 313988 kB VmallocChunk: 34359417340 kB HardwareCorrupted: 0 kB AnonHugePages: 0 kB HugePages_Total: 0 HugePages_Free: 0 HugePages_Rsvd: 0 HugePages_Surp: 0 Hugepagesize: 2048 kB DirectMap4k: 524696 kB DirectMap2M: 0 kB top, htop, free -m, and byobu's RAM monitor all report the same amount. At first I thought this was because of the onboard graphics borrowing some memory, but have now switched to a dedicated GPU and it persists. Is this normal behavior, or has something gone amiss? It's just about 100MB of RAM that's "gone", and I have no idea where it went. I understand that it's normal that not all RAM is available for allocation, but does the system really take an amount relatively high to the amount of RAM available?

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• Fixing partitions and Installing BackTrack

  - by Josh

  My whole problem started when I started trying to install Backtrack(3 or 4) Backtrack was trying to install itself over my entire windows partition (Which I had combined into one when I installed windows 7). So I booted back into windows 7 on my netbook (eee pc 1000 HE btw) I went into disk-manager with the aim of making a partition to install backtrack on but came out with a really screwed up drive. So I had two partions when I started: the windows system partition, and then my main partition and they were blue in diskmanager (I think that has something to do with formatting). After I went through the steps to make a 10 GB FAT32 partition for backtrack I had about five partitons one called PE: that I have no Idea what it is the windows system file, my main partiton 10 GB unallocated space, and two other partions under 50MB each that are both unused space. And they were all converted to simple volumes (Green instead of blue). And backtrack still wants to erase my entire drive. Question number 1: How do I get it back to the way it was? Question 2: How to I get backtrack to dual boot on my netbook?

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• Localhost problems on Mac OS X 10.7

  - by Maya

  Sorry for the duplicate post ( http://stackoverflow.com/questions/9720871/localhost-problems-on-mac-os-x-10-7 ), but I got the advice that this is a better place to ask my question: I want to access a mysql server remotely over ssh. So I used port forwarding to access the remote 3306 port on my localhost as 8383. The ssh connection can established successfully. But when I want to telnet onto port 8383 on localhost I get the following error: ~: telnet 127.0.0.1 8383 Trying 127.0.0.1... telnet: connect to address 127.0.0.1: Connection refused telnet: Unable to connect to remote host I tried the same on a friends Laptop (also Mac OS X 10.7) and it worked fine, so it is very unlikely that the ssh connection is the problem. I assume it has something to do with my local network configuration. I turned off IPv6, just in case. My /etc/hosts looks like this: 127.0.0.1 localhost 255.255.255.255 broadcasthost ::1 localhost fe80::1%lo0 localhost I would greatly appreciate any help. Please point me in the right direction if this is not the right place to ask this question.

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• Can one config LDAP to accept auth from ssh-agent instead of from Kerberos?

  - by Alex North-Keys

  [This question is not about getting your LDAP password to authenticate you for SSH logins. We have that working just fine, thank you :-) ] Let's suppose you're on a Linux network (Ubuntu 11.10, slapd 2.4.23), and you need to write a set of utilities that will use ldapmodify, ldapadd, ldapdelete, and so on. You don't have Kerberos, and don't want to deal with its timeouts (most users don't know how to get around this), quirks, etc. This resolves the question to one of where else to get credentials to feed to LDAP, probably through GSSAPI - which technically doesn't require Kerberos despite its dominance there - or something like it. However, nearly everyone seems to have an SSH agent program, complete with its key cache. I'd really like an ssh-add to be sufficient to allow passwordless LDAP command use. Does anyone know of a project working on using the SSH agent as the source of authentication to LDAP? It might be through an ssh-aware GSSAPI layer, or some other trick I haven't thought of. But it would be wonderful for making LDAP effortless. Assuming I haven't just utterly missed a way to use ldapmodify and kin without having to type my LDAP passwords - using -x is NOT acceptable. At my site, the LDAP server only accepts ldaps connections, and requires authentication for modifying operations. Those are requirements, of course. Any ideas would be greatly appreciated. :-)

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• JavaOne Afterglow by Simon Ritter

  - by JuergenKress

  Last week was the eighteenth JavaOne conference and I thought it would be a good idea to write up my thoughts about how things went. Firstly thanks to Yoshio Terada for the photos, I didn't bother bringing a camera with me so it's good to have some pictures to add to the words. Things kicked off full-throttle on Sunday.  We had the Java Champions and JUG leaders breakfast, which was a great way to meet up with a lot of familiar faces and start talking all things Java.  At midday the show really started with the Strategy and Technical Keynotes.  This was always going to be tougher job than some years because there was no big shiny ball to reveal to the audience.  With the Java EE 7 spec being finalised a few months ago and Java SE 8, Java ME 8 and JDK8 not due until the start of next year there was not going to be any big announcement.  I thought both keynotes worked really well each focusing on the things most important to Java developers: Strategy One of the things that is becoming more and more prominent in many companies marketing is the Internet of Things (IoT).  We've moved from the conventional desktop/laptop environment to much more mobile connected computing with smart phones and tablets.  The next wave of the internet is not just billions of people connected, but 10s or 100s of billions of devices connected to the network, all generating data and providing much more precise control of almost any process you can imagine.  This ties into the ideas of Big Data and Cloud Computing, but implementation is certainly not without its challenges.  As Peter Utzschneider explained it's about three Vs: Volume, Velocity and Value.  All these devices will create huge volumes of data at very high speed; to avoid being overloaded these devices will need some sort of processing capabilities that can filter the useful data from the redundant.  The raw data then needs to be turned into useful information that has value.  To make this happen will require applications on devices, at gateways and on the back-end servers, all very tightly integrated.  This is where Java plays a pivotal role, write once, run everywhere becomes essential, having nine million developers fluent in the language makes it the defacto lingua franca of IoT.  There will be lots more information on how this will become a reality, so watch this space. Technical How do we make the IoT a reality, technically?  Using the game of chess Mark Reinhold, with the help of people like John Ceccarelli, Jasper Potts and Richard Bair, showed what you could do.  Using Java EE on the back end, Java SE and JavaFX on the desktop and Java ME Embedded and JavaFX on devices they showed a complete end-to-end demo. This was really impressive, using 3D features from JavaFX 8 (that's included with JDK8) to make a 3D animated Duke chess board.  Jasper also unveiled the "DukePad" a home made tablet using a Raspberry Pi, touch screen and accelerometer. Although the Raspberry Pi doesn't have earth shattering CPU performance (about the same level as a mid 1990s Pentium), it does have really quite good GPU performance so the GUI works really well.  The plans are all open sourced and available here.  One small, but very significant announcement was that Java SE will now be included with the NOOB and Raspbian Linux distros provided by the Raspberry Pi foundation (these can be found here).  No more hassle having to download and install the JDK after you've flashed your SD card OS image.  The finale was the Raspberry Pi powered chess playing robot.  Really very, very cool.  I talked to Jasper about this and he told me each of the chess pieces had been 3D printed and then he had to use acetone to give them a glossy finish (not sure what his wife thought of him spending hours in the kitchen in a gas mask!)  The way the robot arm worked was very impressive as it did not have any positioning data (like a potentiometer connected to each motor), but relied purely on carefully calibrated timings to get the arm to the right place.  Having done things like this myself in the past I know how easy it is to find a small error gets magnified into very big mistakes. Here's some pictures from the keynote: The "Dukepad" architecture Nice clear perspex case so you can see the innards. The very nice 3D chess set.  Maya's obviously a great tool. Read the full article here. WebLogic Partner Community For regular information become a member in the WebLogic Partner Community please visit: http://www.oracle.com/partners/goto/wls-emea ( OPN account required). If you need support with your account please contact the Oracle Partner Business Center. Blog Twitter LinkedIn Mix Forum Wiki Technorati Tags: Simon Ritter,Java One,OOW,Oracle OpenWorld,WebLogic,WebLogic Community,Oracle,OPN,Jürgen Kress

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• Enabling Hyper-V Integrated Services Time Sync Services versus Internet Time Synchronization

  - by cpuguru

  Should I deselect the "Synchronize with an Internet Time Server" checkbox under the VM's "Date and Time - Internet Time Settings" tab if the "Time Synchronization Service" for a Hyper-V-based Virtual Machine is enabled? One of the Integration Services that Hyper-V provides is the Time Synchronization Service, which can be enabled/disabled by going to a VM's Settings-Integration Services setting in the Management section. I believe this is checked by default. When you install a Windows Server 2008 OS in a VM on the Hyper-V server, it comes with the "Synchronize with an Internet Time Server" option set, pointing to "time.windows.com". I'd think that if the parent Hyper-V server is set to one time server, and the child VM is pointing to a different time server, there would be a momentary blip if the two are not spot on with their times when the synchronization services run. So the question is, which time sync service should I use? I'm assuming not both. And what is the advantage of one over the other? Note: This question assumes that the machines are not joined to a domain. If they were, the machines would also try to update their time against the domain controller with the primary domain controller role too, right? Thanks!

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• Eclipse grinds to a halt when building workspace

  - by Chris Thompson

  Hi all, This is a bit of a vague question because, frankly, I don't even know where to begin diagnosing the issue. My eclipse (Galileo) installation grinds to a complete halt when it's building the workspace -- to the point where I can't even type. I know the Android SDK I have installed is a major culprit because I can watch the memory usage go through the roof (through the built-in heap monitor) when the Android SDK content loader starts up. Every time I save a file though, the program just stops. The message at the bottom of the screen says Building workspace (74%) and sits there for about 30 or so seconds before completing and returning the performance to normal. I have a few other plugins installed (Maven, SVN, etc) but I'm assuming the main issue is Android. Has anybody had similar issues or any luck correcting this sort of problem? If there's anymore information you think would be helpful, just let me know...I didn't want to do a core dump on this question... I'm running it on Windows 7 64-bit for what it's worth. Thanks! Chris

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• Can't boot flash drive on GIGABYTE motherboard

  - by Deltik

  Situation When I try to boot from my flash drive, my GIGABYTE 970A-UD3 motherboard returns this: Loading Operating System ... Boot error All other motherboards I've tried support booting from that flash drive (and a backup flash drive). The operating systems I tried on both flash drives were created with usb-creator-gtk (Ubuntu USB Startup Disk Creator). I know that the motherboard understands that there is an operating system on the flash drives because when I erase them, it complains in an ALL CAPS RAGE that there isn't an operating system, which is correct. How can I boot a flash drive that's bootable from other motherboards on this motherboard? Qualification This question is not a duplicate of this one because directly writing to the flash drive as an ISO 9660 (dd if=operating_system.iso of=/dev/sdb) still does not have the motherboard recognize the operating system. This question should be a duplicate of this one because I provide more information not provided by that poster. This forum thread has broken links and does not have a solution to my problem. Nobody knows what's going on in this forum thread.

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• Commandline program to extract archives with automatic subdirectry detection

  - by ??????

  The title already says it. What I'm looking for is essentially the pure commandline counterpart to ark -ba <path> (on KDE), or file-roller -h <path> (on GNOME/Unity). Unfortunately, both ark and file-roller require X to be running. I'm aware that it is relatively simple to write a tool that detects archives based on their file extension, and then runs the appropiate program: #!/bin/bash if [[ -f "$1" ]] ; then case $1 in *.tar.bz2) tar xjvf $1 ;; *.tar.gz) tar xzvf $1 ;; *.bz2) bunzip2 $1 ;; *.rar) rar x $1 ;; *.gz) gunzip $1 ;; *.tar) tar xf $1 ;; *.tbz2) tar xjvf $1 ;; *.tgz) tar xzvf $1 ;; *.zip) unzip $1 ;; *.Z) uncompress $1 ;; *.7z) 7z x $1 ;; *) echo "'$1' cannot be extracted with this utility" ;; esac else echo "path '$1' does not exist or is not a file" fi However, that doesn't take care of subdirectory detection (and in fact, many extraction programs do not even supply such an option). So might there be a program that does exactly that? I wasn't sure whether or not to ask on askubuntu.com, because this question isn't really about Ubuntu, but rather about any Linux operating system. My apologies if this question does not fit in here.

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• Does the Intel DX79TO motherboard support x8 devices (SAS HBAs) on PCIe x16 slots?

  - by Zac B

  Context: I have an Intel DX79TO motherboard and a Sun SAS3081E-S/LSI 1060E-S HBA card with a PCIe x8 interface. I plug the HBA into my mobo next to my graphics card, and the HBA power lights illuminate, but the BIOS and OSes (tried Linux, ESXi, Win7) don't see the HBA at all. Question: Does the DX79TO motherboard support non-x16/non-GPU devices in its PCIe x16 slots? According to this question, some consumer motherboards don't support this, but I can't figure out whether or not this motherboard/family does. The answer will affect whether I buy a new motherboard or RMA the SAS card, with money attached to each course, so I figured I'd ask here first. What I've Tried: I've read the spec/manuals for the motherboard and the HBA, and I didn't see anything regarding whether or not the x16 slots were back-compatible to lower lane widths/non graphics-card devices, or whether or not the card could run in wider slots than x8. I've tried contacting Intel, but that was over a month ago and I haven't yet heard anything back except an automated "we got your email!" message.

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• nginx+mysql5 loadtesting configuration strangeness

  - by genseric

  i am trying to setup a new server running on debian6 and trying to make it work smooth under load. i ve used a wordpress site as a test object, and tried the configurations on http://blitz.io. when i increase the mysql max_connections from 50 to 200 lots of timeouts start to occur. but on 50 , no timeouts and pretty well response times. nginx configuration is fine , i tuned the config so i dont see errors. so i presume it's related to the other configuration options of my.cnf . i read some about options but still cant find what max_connections problem is all about. btw, the server has 16gb of ram and a fine i7 cpu. here is the current my.cnf [client] port = 3306 socket = /var/run/mysqld/mysqld.sock [mysqld_safe] socket = /var/run/mysqld/mysqld.sock nice = 0 [mysqld] wait_timeout=60 connect_timeout=10 interactive_timeout=120 user = mysql pid-file = /var/run/mysqld/mysqld.pid socket = /var/run/mysqld/mysqld.sock port = 3306 basedir = /usr datadir = /var/lib/mysql tmpdir = /tmp language = /usr/share/mysql/english skip-external-locking bind-address = 127.0.0.1 key_buffer = 384M max_allowed_packet = 16M thread_stack = 192K thread_cache_size = 20 myisam-recover = BACKUP max_connections = 50 table_cache = 1024 thread_concurrency = 8 query_cache_limit = 2M query_cache_size = 128M expire_logs_days = 10 max_binlog_size = 100M [mysqldump] quick quote-names max_allowed_packet = 16M [mysql] #no-auto-rehash # faster start of mysql but no tab completition [isamchk] key_buffer = 16M thanks in advance. i asked this question on SO but it's closed as off topic so i believe this is a SF question.

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