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• Maximum RAM on Biostar P4M8PM7 Socket775 mATX board

  - by Alex Balashov

  I have a server with a Biostar P4M8PM7 ("Pro-M7") board based on a VIA chipset. It's a strange board to put in a server because it seems like more of a desktop board to me, but alas! It takes DDR2-667 (PC5300) RAM. What I can't figure out is the maximum amount I can put in it, as I cannot find the manual anywhere online. I've found a few marketing broadsheets from online retailers that say, "up to 2 GB of RAM!" but I am not sure whether to believe them. They also do not seem to be quite for the same board, as they indicate DDR2 400/533 RAM, for example: http://www.geeks.com/details.asp?invtid=P4M8P-M7. The manufacturer's web site says the same thing, but does not elaborate. It's a 64-bit CPU and board; is there a technical reason why the board would not be able to address more than 2 GB? Can someone tell me what sort of that reason that would be? I bought this server from someone really hoping I could put 8 to 16 in it, and wanted to do some research before I gave up. On a related note, it's not indicated anywhere whether it can take ECC RAM; the existing chips are not ECC, but most memory sold in the range I'm looking for (e.g. DIMMs with enough chip density to do 8 GB) seems to be server-class and for that reason ECC. Any ideas? Thank you very much for your consideration in advance!

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• Backing up SQL NetApp Snapshots using TSM

  - by WerkkreW

  In our environment we have a 3 node SQL 2005 Cluster which is on NetApp storage. We are currently using SMSQL (NetApp SnapManager for SQL) to take Snapshot backups of the data. This works great, but due to some audit requirements we are also forced to maintain some copies on tape. We have used NDMP in other places across the enterprise but we do not want to use it in this specific instance. Basically what I need to do is, get the most recent snapshot copy of the databases on tape, via Tivoli Storage Manager (TSM). What I have done is, obtained a basic Windows Server 2003 VM with SnapDrive installed, which is SAN attached and zoned to the NetApp, and I have written a batch file to do the following: Mount the latest __RECENT snapshot lun to the host, using a specific drive letter Perform a TSM based incremental backup Dis-mount the LUN This seems to work fine, except sometimes the LUN's do not mount due to some sort of timeout. Also, due to my limited knowledge of windows batch scripting, I have no way to monitor the success or failure of these backups since I do not know how to send a valid return code back to the TSM scheduling service. Is there a more efficient/elegant way to accomplish this without NDMP?

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• SQL Server 2008 cluster freezing

  - by Ed Leighton-Dick

  We have run into a strange situation in which a SQL Server 2008 single-node cluster hangs. As background, we are rebuilding a Windows Server 2003/SQL Server 2005 two-node cluster using Windows 2008 and SQL Server 2008. Here's the timeline: Evicted the passive node (server B) from the Windows 2003/SQL 2005 cluster. The active node now functions as a single-node cluster with no problems. Wiped server B's disks and installed Windows 2008 and SQL Server 2008 as a single-node cluster. Since we do not want to the two clusters to communicate yet, we left the cluster's private network "heartbeat" adapter unconfigured. The cluster comes up and functions normally. Moved all databases to the new cluster. Cluster continues to function normally. Turned off server A (old cluster) in preparation for rebuilding as the second node of the new cluster. SQL Server instance on server B (new cluster) locks up, even though it should have no knowledge of or interaction with server A. Restarted server A. SQL Server instance on server B (new cluster) immediately begins working again. Things we have tried: The new cluster's name responds to ping and NETBIOS requests, even while the SQL Server is hung. We have confirmed that no IP address is assigned to the old heartbeat adapter, and it is not pulling an IP address from DHCP. Disabling the heartbeat's network card has the same effect. No errors were generated in any logs - Windows or SQL. When the error first occurred, it sat in the hung state for quite some time (well over 10 minutes) before anyone figured out what was going on. This would seem to eliminate any sort of normal cluster timeout in which it would have been searching for the other node (even if one had been configured). Server B is running Windows 2008 SP2, fully patched, and SQL Server 2008 SP1 CU7 (10.0.2775).

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• Trying to configure DNS on a Godaddy Virtual Dedicated host, Mediatemple Domain Registration [closed]

  - by dclowd9901

  A client of mine purchased VD hosting with Godaddy and a domain name with Mediatemple. I've never configured DNS from scratch, and I'm finding it very difficult to find any sort of explanation on how to go about it. As of right now, Mediatemple is pointing to the Godaddy's ns1.domaincontrol.com and ns2.domaincontrol.com nameservers. The VD hosting on Godaddy (via their Simple Control Panel) has options to "Add a new domain", which brings you through a wizard of sorts that asks you if the domain has already been registered (yes), what it is (dclowd9901.com for this example), create a system username and password for it (with checkboxes for SSH and FTP access), which level of user can administer it, and whether a mail account should be setup. When complete, it also creates a zone file. In this zone file, the Primary nameserver is ns1.dclowd9901.com; the records are as follow (where 12.23.12.34 is the presumed host): @ A 12.23.12.34 @ NS ns1 @ NS ns2 ns1 A 12.23.12.34 ns2 A 12.23.12.34 @ MX mail www A 12.23.12.34 ftp A 12.23.12.34 ssh A 12.23.12.34 mail A 12.23.12.34 If anyone can shed any light on this for me, explain to me the interactions between the registrar and the host and so on, I'd be very grateful. Thanks in advance for the help.

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• MS SQL Server slows down over time?

  - by Dave Holland

  Have any of you experienced the following, and have you found a solution: A large part of our website's back-end is MS SQL Server 2005. Every week or two weeks the site begins running slower - and I see queries taking longer and longer to complete in SQL. I have a query that I like to use: USE master select text,wait_time,blocking_session_id AS "Block", percent_complete, * from sys.dm_exec_requests CROSS APPLY sys.dm_exec_sql_text(sql_handle) AS s2 order by start_time asc Which is fairly useful... it gives a snapshot of everything that's running right at that moment against your SQL server. What's nice is that even if your CPU is pegged at 100% for some reason and Activity Monitor is refusing to load (I'm sure some of you have been there) this query still returns and you can see what query is killing your DB. When I run this, or Activity Monitor during the times that SQL has begun to slow down I don't see any specific queries causing the issue - they are ALL running slower across the board. If I restart the MS SQL Service then everything is fine, it speeds right up - for a week or two until it happens again. Nothing that I can think of has changed, but this just started a few months ago... Ideas? --Added Please note that when this database slowdown happens it doesn't matter if we are getting 100K page views an hour (busier time of day) or 10K page views an hour (slow time) the queries all take a longer time to complete than normal. The server isn't really under stress - the CPU isn't high, the disk usage doesn't seem to be out of control... it feels like index fragmentation or something of the sort but that doesn't seem to be the case. As far as pasting results of the query I pasted above I really can't do that. The Query above lists the login of the user performing the task, the entire query, etc etc.. and I'd really not like to hand out the names of my databases, tables, columns and the logins online :)... I can tell you that the queries running at that time are normal, standard queries for our site that run all the time, nothing out of the norm.

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• Tips on setting up a virtual lab for self-learning networking topics

  - by Harry

  I'm trying to self-learn the following topics on Linux (preferably Fedora): Network programming (using sockets API), especially across proxies and firewalls Proxies (of various kinds like transparent, http, socks...), Firewalls (iptables) and 'basic' Linux security SNAT, DNAT Network admininstration power tools: nc, socat (with all its options), ssh, openssl, etc etc. Now, I know that, ideally, it would be best if I had 'enough' number of physical nodes and physical network equipment (routers, switches, etc) for this self-learning exercise. But, obviously, don't have the budget or the physical space, nor want to be wasteful -- especially, when things could perhaps be simulated/emulated in a Linux environment. I have got one personal workstation, which is a single-homed Fedora desktop with 4GB memory, 200+ GB disk, and a 4-core CPU. I may be able to get 3 to 4 additional low-end Fedora workstations. But all of these -- including mine -- will always remain strictly behind our corporate firewall :-( Now, I know I could use VirtualBox-based virtual nodes, but don't know if there are any better alternatives disk- and memory- footprint-wise. Would you be able to give me some tips or suggestions on how to get started setting up this little budget- and space-constrained 'virtual lab' of mine? For example, how would I create virtual routers? Has someone attempted this sort of thing before: namely, creating a virtual network lab behind a corporate firewall for learning/development/testing purposes? I hope my question is not vague or too open-ended. Basically, right now, I don't know how to best leverage the Linux environment and the various 'goodies' it comes with, and buying physical devices only when it is absolutely necessary.

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• Windows Server 2008R2 Virtual Lab Activation strategies?

  - by William Hilsum

  I have a ESXi server that I use for testing, however, I am often needing to create additional Windows Server virtual machines. Typically, if I do not need a VM for more than 30 days, I simply do not activate. However, I have been doing a lot of HA/DRS testing recently and I have had a few servers up for more than this time. I have a MSDN account with Microsoft and have already received extra keys for Windows Server 2008 R2. I am doing nothing illegal and I am sure if I asked, they would issue more - but, I do not want to tempt fate! I have got 3 different "activated" windows snapshots I can get to at any time. If I try to clone these machines, I get the usual "did you copy or move them VM" message. If I choose copy, as far as I can see, it changes the BIOS ID and NIC MACs which is enough to disable activation. If I choose move, it keeps the activation fine (obviously, I know to change the NIC MAC - I believe I can leave the BIOS ID without problems). However, either of these options keeps the same SID code for the computer and user accounts. After the activation period has expired, as far as I can see, all that happens is optional updates do not work - it seems that the normal updates work fine. Based on this, as you can easily get in to Windows when not activated without any sort of workaround, I was wondering if it is ok just to leave a machine un activated? (However, I obviously would prefer if it was activated!) Alternatively, how dangerous is it run multiple machines on a non domain environment with the same SID? I am just interested to know if anyone can recommend a strategy for me? I have only found one solution that deals with bypassing activation - I am not interested in doing anything remotely dodgy... at a stretch, I am happy to rearm (I have never needed to keep a server past 100 days), but, I would rather have a proper strategy in place.

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• Can you "swap" the Sysprep answer file in Windows 7

  - by Ben

  I have a load of new Lenovo laptops which I am due to distribute in my company. We are distributed in multiple locations and I want to ship the laptops "boxed" and untouched by IT hand for distribution. We are using LANDesk to do all the software distribution and provisioning, but are currently falling at the first hurdle as when booted, the laptops kick into the Lenovo mini-setup wizard. I assume this is because they have been sysprepped at Lenovo. In order to keep with our (almost) zero touch strategy I want the users to PXE boot into a PE of some sort, which will run a script on startup which replaces the sysprep answer file with one of my own. (i.e. prepopulated with product key, company info etc.) and then reboot to complete Sysprep. The plan is that this will run, and then install the LANDesk agent as a post-sysprep task, which in turn will complete the provisioning. Anyone have any experience / know any pitfalls to look out for / can suggest a suitable, PXE-bootable PE environment? Apologies for the verbosity of the question - it takes a bit of explaining! Thanks in advance, Ben

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• Windows Server 2003 DHCP not handing out IPs

  - by SnOrfus

  I'm trying to setup a home server (to tinker with) as a domain controller. I've setup the domain and I've installed DHCP and setup a scope without any exclusions (with the default range of 192.168.0.1-254). My client machine is a Windows 7 (RC) machine and it has a connection but can't get an IP address. Even if I try setting the IP to a static 192.168.0.2 and there is still no connectivity. I can ping it from the server, but pinging the server from the client just times out. The only thing between the server and the client is a 24 port switch (D-Link DES-1024D). edit Ok, it turned out that the interfaces were setup backwards in the NAT settings (the internal nic connection was set to public and the external nic connection was set to private). I changed this and all was OK.... sort-of. Problem is now: If I set a static ip on the client (where I am typing this from) all is fine. BUT; when I set it to get it from DHCP, I get a correct IP from the server (192.168.0.2) but there is no internet on the client; but I can still ping the server fine from the client (which makes sense cause I was able to get an IP from it). edit I ended up just removing the Routing and DHCP server roles and just going with ICS for the time being until I get my hands on some better learning tools.

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• Looking for a help desk ticketing system..

  - by Dan

  Hi guys Im looking for a good help desk ticket solution. It must perform the following actions for it to be useful. It needs to have a single point of contact via email..e.g [email protected] If we recieve a telephone(or an email outside of the system) we need to be able to create a ticket as if had been added via the single point of contact, this needs to be done with ease in order to save time. Certain people within our organisation deal with certain customers, so if the email/ custom input support call as mentioned in bullet 2 is picked up as having a relationship with that certain person in our organisation it needs to be sent to them/put in their queue for them to work on. If a person is out of office or sick any tickets sent to them must be forwarded to somebody else or put into a seperate pool of tickets that anybody can access. Perhaps have an agent that sorts through tickets in the pool and assigns them to anybody who is available, preferably the person with fewest tickets in their queue/list. Once a customer emails and the system logs it they immediately get a response with a ticket number and maybe details of who is dealing with the problem. Any correspondance in relation to a particular ticket is automatically grouped into some sort of message, and not made into a load of separate tickets. I.e system scans incoming email subjects for ticket numbers and assosciates it with exisiting tickets if that number exists. Any help is much appreciated Thanks P.S I have taken a look at OTRS but i'm not feeling it so unless someone can convince me I guess i'm after an alternative.

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• Samba 3.5 Shadow Copy for Windows 7

  - by Prashanth Sundaram

  Over the past several days I have been trying to get the shadow to work with samba but haven’t been successful. Can someone check below config and let me know if I am missing something? We are using Equallogic SAN and iSCSI LUNS to mount volumes. I can cleanly access samba shares on Windows 7 clients but just not shadow copy. I have referred the official how-to but couldn’t get it to work. I see these messages in the logs. Any help is deeply appreciated. [2012/10/31 12:20:53.549863, 0] smbd/nttrans.c:2170(call_nt_transact_ioctl) FSCTL_GET_SHADOW_COPY_DATA: connectpath /fs/test-01, failed. [2012/10/31 12:21:13.887198, 0] modules/vfs_shadow_copy2.c:734(shadow_copy2_get_shadow_copy2_data) shadow:snapdir not found for /fs/test-01 in get_shadow_copy_data [2012/10/31 12:21:13.887265, 0] smbd/nttrans.c:2170(call_nt_transact_ioctl) FSCTL_GET_SHADOW_COPY_DATA: connectpath /fs/test-01, failed. == Samba pkgs == samba-3.5.10-116.el6_2.x86_64 samba-common-3.5.10-116.el6_2.x86_64 samba-winbind-clients-3.5.10-116.el6_2.x86_64 samba-client-3.5.10-116.el6_2.x86_64 === df –h == First is the iSCSI LUN and 2 others are snapshots. /dev/mapper/eql-0-fs-test01 5.0G 2.3G 2.5G 48% /fs/test-01 /dev/mapper/eql-2-0+fs-test01 5.0G 2.3G 2.5G 48% /fs/test-01/@GMT-2012.10.26-17.32.42/fs/test-01 (SNAPSHOT-1) /dev/mapper/eql-d-0+fs-test01 5.0G 2.3G 2.5G 48% /fs/test-01/@GMT-2012.10.31-11.52.42/fs/test-01 (SNAPSHOT- 2) ===/etc/samba/smb.conf === [global] workgroup = DOMAIN server string = Samba Server Version %v security = ads realm = DOMAIN.CORP encrypt passwords = yes guest account = nobody map to guest = bad uid log file = /var/log/samba/%m.log domain master = no local master = no preferred master = no os level = 0 load printers = no show add printer wizard = no printable = no printcap name = /dev/null disable spoolss = yes follow symlinks = yes wide links = yes unix extensions = no [test] comment = Test Directories path = /fs/test-01 vfs objects = shadow_copy2 #shadow_copy2: sort = desc #shadow: localtime = yes #shadow: snapdir = /fs/test-01/test #shadow: basedir = /fs/test-01 guest ok = yes writeable = yes map archive = no force create mode = 0660 force directory mode = 2770 inherit owner = yes inherit permissions = yes All feedback is welcome. 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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• New Computer freezing up at random

  - by Benjamin Frost

  Since I built my system about 4 weeks ago I'v been getting random freezes, Sometimes it can happen directly after startup and sometimes it wont freeze up for 3-4 days of 24/7 running. It seems to be happening under all stress loads but mainly when the CPU is under 10% load. It doesn't give me a BSOD or anything, it simply just freezes and repeats the last sound before the freeze until I shut it down by the power button. I'v re-seated everything in the system except the CPU, Cleaned the RAM sockets and gold fittings. None of the components have been clocked above their factory settings as of yet, don't want to overclock them until I sort out these freezes. Temps are all well under the rated max temps, the highest the temps have been are below CPU: Low load: 16-21°C Full Load (100%) 40-43°C *(From HWMonitor by CPUID) GPU 1: Low Load: 25-30°C Full Load (100%): 45-50°C GPU 2: Low Load: 23-27°C Full Load (100%): 45-50°C *(GPU Temps from Catalyst Control Center) General Case temps Rear: 18-20°C Mid: 20-21°C Front (HDD/SSD Bays): 14-19°C (Case temps may be a little off as it's from the Kaze master pro fan controller) I have Un-installed EVERY driver for Motherboard, GPU & Soundcard and Re-installed twice. Windows is all up to date. To date i'v tried the following Running Memtest for 24 hrs straight, No errors Running Memtest on each individual RAM modules, No errors Reseated everything except the CPU Cleaned DIMM Sockets and Gold inputs Tested the Graphics cards 1 at a time Re-arranged all the SATA devices to run on Chipset controlled ports Re-installing all drivers OS: Win7 Professional 64bit Motherboard: ASRock X79 Extreme9 CPU: i7 3930k 3.2GHz GPU: Sapphire 7950 OC Edition V2 (2 card Crossfire) RAM: G.Skill Ripjaws Z F3-17000CL11Q-16GBZL 16GB (4x4GB) DDR3 Boot Drive: OCZ Agility 4 128GB Data Drive 1: Western Digital Black 2TB Data Drive 2: Western Digital Black 2TB Data Drive 3: Western Digital Green 3TB Power Supply: Corsair AX1200 Gold

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• GRE Tunnel over IPsec with Loopback

  - by Alek

  I'm having a really hard time trying to estabilish a VPN connection using a GRE over IPsec tunnel. The problem is that it involves some sort of "loopback" connection which I don't understand -- let alone be able to configure --, and the only help I could find is related to configuring Cisco routers. My network is composed of a router and a single host running Debian Linux. My task is to create a GRE tunnel over an IPsec infrastructure, which is particularly intended to route multicast traffic between my network, which I am allowed to configure, and a remote network, for which I only bear a form containing some setup information (IP addresses and phase information for IPsec). For now it suffices to estabilish a communication between this single host and the remote network, but in the future it will be desirable for the traffic to be routed to other machines on my network. As I said this GRE tunnel involves a "loopback" connection which I have no idea of how to configure. From my previous understanding, a loopback connection is simply a local pseudo-device used mostly for testing purposes, but in this context it might be something more specific that I do not have the knowledge of. I have managed to properly estabilish the IPsec communication using racoon and ipsec-tools, and I believe I'm familiar with the creation of tunnels and addition of addresses to interfaces using ip, so the focus is on the GRE step. The worst part is that the remote peers do not respond to ping requests and the debugging of the general setup is very difficult due to the encrypted nature of the traffic. There are two pairs of IP addresses involved: one pair for the GRE tunnel peer-to-peer connection and one pair for the "loopback" part. There is also an IP range involved, which is supposed to be the final IP addresses for the hosts inside the VPN. My question is: how (or if) can this setup be done? Do I need some special software or another daemon, or does the Linux kernel handle every aspect of the GRE/IPsec tunneling? Please inform me if any extra information could be useful. Any help is greatly appreciated.

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• Windows Server 2003 DHCP not handing out IPs

  - by SnOrfus

  I'm trying to setup a home server (to tinker with) as a domain controller. I've setup the domain and I've installed DHCP and setup a scope without any exclusions (with the default range of 192.168.0.1-254). My client machine is a Windows 7 (RC) machine and it has a connection but can't get an IP address. Even if I try setting the IP to a static 192.168.0.2 and there is still no connectivity. I can ping it from the server, but pinging the server from the client just times out. The only thing between the server and the client is a 24 port switch (D-Link DES-1024D). edit Ok, it turned out that the interfaces were setup backwards in the NAT settings (the internal nic connection was set to public and the external nic connection was set to private). I changed this and all was OK.... sort-of. Problem is now: If I set a static ip on the client (where I am typing this from) all is fine. BUT; when I set it to get it from DHCP, I get a correct IP from the server (192.168.0.2) but there is no internet on the client; but I can still ping the server fine from the client (which makes sense cause I was able to get an IP from it). edit I ended up just removing the Routing and DHCP server roles and just going with ICS for the time being until I get my hands on some better learning tools.

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• Can I run a mix of static addressing and NAT?

  - by aroth

  Let's say that an ISP offers a plan with 5 static IP addresses, but I have more than 5 devices, many of which (such as a networked printer, for instance) I do not want or need to have a static IP address. So the topography I'm planning goes something like: ISP -> Router -> Switch -> Computer (static address) -> Computer (static address) -> Printer (DHCP/NAT) -> Tv (DHCP/NAT) -> (...) -> Wireless Devices (DHCP/NAT) Generally speaking, is it possible to run a network like that? If not, then what sort of setup do I need so that I can assign static addresses just to the things that need them, and use DHCP/NAT for everything else? Also, what internal networking devices will consume a static IP address? I'm pretty sure the router will, correct? Does the switch also?

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• DHCP not responding from laptop or router, but works on directly plugged PC?

  - by Matt H

  I'm at my sister in law's place in Singapore. I'm not from Singapore but am here for a few months. She has some sort of cable modem made by motorolla (SB5101 Surfboard). I think it goes, through starhub or similar provider. Anyhow, her PC is directly attached by cable (not wireless) and she can access the internet. There is no wireless router connected to it. The PC is configured with DHCP and appears to be working. However, the moment I unplug her PC and plug in my laptop, it doesn't get an address. The interesting thing here is that I also see this toredo tunnel adaptor etc. I'm not familiar with what that is. It appears to be being assigned an IP v6 address and an IP v4 address. I thought perhaps it's my laptop, but also when I plug in my DDWRT based router, it also fails to get a DHCP assigned address on the WAN port. I can't also seem to connect into any web configuration on the motorolla modem either. Any ideas? what kind of setup is this? all I'd like to do is plug in my wireless router so I can roam around the house and also access the internet.

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• Windows Remote Desktop (RDP/MSTSC) fails with Error Code: 5

  - by BryCoBat

  I have 2 Windows XP boxen: A (running XP SP3) and B (running XP SP2). I'm using Remote Desktop to connect from A to B. When I connect, I get the login screen (which is slow to respond to keyboard/mouse input), and after logging in, I get the following: Fatal Error (Error Code: 5) Your Remote Desktop session is about to end. This computer might be low on virtual memory. Close your other programs, and then try connecting to the remote computer again. If the problem continues, contact your network administrator or technical support. I've seen one way to (sometimes) get in by opening a second RDP session to the same box [1], and if I wait long enough sometimes it will go ahead and log in anyway. Is there something broken/missing on the PC I'm trying to remote in to? Edited in reply to djangofan: There's nobody listed under "Lock pages in memory". When the double login trick works, a glance at Task Manager shows plenty of free memory, 800MB available out of 1.5 GB. (Performance tab, Physical memory) For what it's worth, this happens consistently after a reboot. What sort of exact info would be useful? There's very little remaining installed on that machine that's not Windows + Office... [1] found at http://www.fdcservers.net/vbulletin/archive/index.php/t-1580.html

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• Sharing disk volumes across OpenVZ guests to reduce Package Management Overhead

  - by andyortlieb

  Is it feasible to create a single "master" OpenVZ guest who would only be used for package management, and use something like mount --bind on several other OpenVZ guests sort of trick them into using the environment installed by the master guest? The point of this would be so that users can maintain their own containers, and yet stay in sync with the master development environment, so they'll always have the latest & greatest requirements without worrying too much about system administration. If they need to install their own packages, could put them in /opt, or /usr/local (or set a path to their home directory)? To rephrase, I would like several (developer's, for example) OpenVZ guests whose /bin, /usr (and so on...) actually refer to the same disk location as that of a master OpenVZ guest who can be started up to install and update common packages for the environment to be shared by all of this group of OpenVZ guests. For what it's worth, we're running Debian 6. Edit: I have tried mounting (bind, and readonly) /bin, /lib, /sbin, /usr in this fashion and it refuses to start the containers stating that files are already mounted or otherwise in use: Starting container ... vzquota : (error) Quota on syscall for id 1102: Device or resource busy vzquota : (error) Possible reasons: vzquota : (error) - Container's root is already mounted vzquota : (error) - there are opened files inside Container's private area vzquota : (error) - your current working directory is inside Container's vzquota : (error) private area vzquota : (error) Currently used file(s): /var/lib/vz/private/1102/sbin /var/lib/vz/private/1102/usr /var/lib/vz/private/1102/lib /var/lib/vz/private/1102/bin vzquota on failed [3] If I unmount these four volumes, and start the guest, and then mount them after the guest has started, the guest never sees them mounted.

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• OS X can't copy files from Windows Home Server...over wifi.

  - by John Clayton

  I'm a brand spanking new user of OS X, coming from a lifetime of Windows use. I've been setting up my new Macbook Pro and have run into a very unusual problem. Over wifi, I am unable to copy files to or from my Windows Home Server. The problem seems to exist only over wifi, and only to WHS. Here are the details of my setup: 2010 Macbook Pro (Core i7), OS X 10.6.3 Windows Home Server PP3 (virtualized in XenServer 5.5) Windows 7 Ultimate x64 desktop Windows 7 Ultimate x64 in Boot Camp D-Link DIR-655 wireless N router Here is what I've done to narrow down the problem: Files copy fine from WHS to OS X when using gigabit ethernet Files copy fine from desktop to OS X when using gigabit ethernet Files fail to copy from WHS to OS X when using wifi (error -51) Files copy fine from desktop to OS X when using wifi Files copy fine from WHS to Boot Camp when using wifi Files copy fine from desktop to Boot Camp when using wifi From what I can tell, it seems to be some sort of issue between OS X and WHS, but I can't for the life of me see what would be different between shares on WHS and my desktop. They are both connected using smb://ADDRESS (I've tried both by IP and name). I can browse the shares on the WHS, but copying to OS X fails. I originally found the issue while installing VS2010 off an ISO from WHS, mounted to a Windows 7 VM using VMware Fusion. During the installation the VM was unusable - even the clock got behind the host be about 8 minutes. Once I plugged in the ethernet and disabled the wifi things picked up and finished quickly. The Fusion 3.1 RC is the only I think of that I installed that may have messed with the wifi driver. I've also tried resetting the wifi router, and have changed it from being G & N to N-only. Under Boot Camp I get similar speeds as my wife's N laptop. Any ideas? Thanks!

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• Issues with sustained traffic with PFSense

  - by Farseeker

  Last week we had to replace our PFSense firewall because it had a catastrophic hardware failure. All but one of the NICs were taken out of the old server and put into the new one. The one NIC that was not moved was the LAN NIC as this is on-board. The other NICs are all WAN connections and the must all be present (i.e. I can't disable one just for the sake of testing) After re-installing PFSense and restoring our backup of the configuration, everything came back online just fine, however on the new hardware any download that takes longer than about 10 seconds just times out in the middle. Example 1: Downloading from Microsoft.com goes at about 900k/sec and times out after about 10 seconds (thus, just under 10Mb of content) Example 2: Downloading from cnet.com goes at about 300k/sec and times out after about 10 seconds (thus, about 3Mb of content). By times out, I mean that the download just stops, and you have to pause/resume to get the next part done, repeat and rinse until the download is complete. However it's not consistant, sometimes it's 10 seconds, sometimes it's 4 seconds, and it sometimes you can't even load a heavy HTML page because the page never finishes. I assume this is most likely because PFSense does not like the onboard NIC, as this is the primary difference between the two servers. It's recognised as NFE0, and there's no room in the server for any more NICs and I don't have any dual-port NICs handy to experiment with a different LAN connection. I've never had to troubleshoot this sort of issue before. Can anyone give me some pointers about where to start? Linux is not my forte so please be kind!

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• Clustering/load balancing for cluster unaware applications

  - by AaronLS

  Forgive me if I use any of these terms incorrectly. I am wondering if there is any kind of software that would allow my two "join" two computers together such that a cluster unaware application could utilize their combined computing resources? By "cluster unaware" I mean an application that isn't designed to share work across multiple services. My understanding is that clustering is enabled by the specific application by it's architecture, such that messaging with multiple instances of the application coordinate the sharing of work. Instead I am looking for something that enables clustering at the OS or virtualization level, so that any application could essentially be clustered. Failing that, I am also wondering about the following scenario: We have 3 different applications we will call A, B, and C. We have 2 single core computers. At any given time lets say that any combination of those applications will be CPU intensive. In cases where only 2 of those apps are very active, have one of them moved over to a different server. In a nutshell, some sort of dynamic automatic shuffling of the application's load. I have heard of virtual machines that can be migrated across physical machines while live, but I am wondering if this can be done automatically in response to an application's or VM's CPU activity?

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• Socket options for a tcp server with 3G clients & frequent disconnections

  - by Joel

  I have a TCP server, written in java, sending and receiving many short messages, from 500 bytes to 100 KB long. It's a chess game and chat server, to make it simple. The server is running Debian 6. Half of the clients are connecting from 3G networks, and half over standard DSL. A portion of the 3G clients lose connection pretty often. The error I get on the server and on the client socket is Connection reset. I have come across this page at Oracle documentation: socketOpt. I am wondering what I could tune there to lower the number of disconnections from 3G clients. I don't mind about the ping or transfer rate, but just about the TCP disconnections. I am not skilled enough to understand the impact of each setting, but I sort of understood that the TCP window was important, although I don't know exactly how. So I'm asking if anyone here has an idea ? Thanks if you can help.

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• Mirror a Dropbox repository in Sharepoint and restrict access

  - by Dan Robson

  I'm looking for an elegant way to solve the following problem: My development team uses Dropbox for sharing documents amongst our immediate group. We'd like to put some of those documents into a SharePoint repository for the larger group to be able to access, as granting Dropbox access to the group at large is not ideal. However, we'd like to continue to be able to propagate changes to the SharePoint site simply by updating the files in Dropbox on our local client machines, and also vice versa - users granted access on SharePoint that update files in that workspace should be able to save their files and the changes should appear automatically on our client PC's. I've already done the organization of the folders so that in Dropbox, there exists a SharePoint folder that looks something like this: SharePoint ----Team --------Restricted Access Folders ----Organization --------Open Access Folders The Dropbox master account and the SharePoint master account are both set up on my file server. Unfortunately, Dropbox doesn't seem to allow syncing of folders anywhere above the \Dropbox\ part of the file system's hierarchy - or all I would have to do is find where the Sharepoint repository is maintained locally, and I'd be golden. So it seems I have to do some sort of 2-way synchronization between the Dropbox folder on the file server and the SharePoint folder on the file server. I messed around with Microsoft SyncToy, but it seems to be lacking in the area of real-time updating - and as much as I love rsync, I've had nothing but bad luck with it on Windows, and again, it has to be kicked off manually or through Task Scheduler - and I just have a feeling if I go down that route, it's only a matter of time before I get conflicts all over the place in either Dropbox, SharePoint, or both. I really want something that's going to watch both folders, and when one item changes, the other automatically updates in "real-time". It's quite possible I'm going down the entirely wrong route, which is why I'm asking the question. For simplicity's sake, I'll restate the goal: To be able to update Dropbox and have it viewable on the SharePoint site, or to update the SharePoint site and have it viewable in Dropbox. And since I'm a SharePoint noob, I'll also need help hiding the "Team" subfolder from everyone not in a specific group in AD.

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• What's with the accesses to $random_existing_file/cache/df.php?

  - by Bernd Jendrissek

  Occasionally I eyeball Apache's access_log and lately I've been noticing these accesses to URLs that I don't serve. They're correctly 404'ed, but I'd like to know just who and what is involved here. "Obviously" it's some sort of vulnerability probing; I'd like to know which. (Not that it affects me, but I like to know the score.) Here's an example: 69.89.31.206 - - [28/Nov/2012:17:36:34 +0200] "GET /cvfull.pdf/cache/df.php HTTP/1.1" 404 489 "-" "-" Oddly, all 26 attempts are to either /cache/df.php, or to /cvfull.pdf/cache/df.php - they come in pairs. A few weeks ago it was zx.php, now it's df.php - I'm assuming the target is the same. Perhaps I should be flattered that a script is thinking of hiring me. Seriously, my CV is one of only two PDF files on my site, so I can only guess that non-PDF URLs aren't interesting? I've tried Googling for "cache df php", but my Google-fu is weak at the best of times, so I can only find a few reports of other script attacks. What's the vulnerability being scanned for here?

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