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  • VMware ESXi 4 On-Disk Data Deduplication - possible and supported?

    - by hurikhan77
    Environment: We are running multiple web, database, and application servers which usually share a pretty common installation (gentoo linux) and similar configuration in VMware ESXi 4. The differences are usually only some installed features or differing component versions. To create a new server, I usually choose the most similar (by features) running server, rsync a copy of it into freshly mounted filesystems, run grub, reconfigure and reboot. Problem: Over time this duplicates many on-disk data blocks which probably sums up to several 10's of gigabytes. I suppose if I could use a base system as template with the actual machines based on top of that, only writing changed blocks to some sort of "diff image", performance should improve (increased cache hit rate) and storage efficiency should increase (deduplicated storage space). This would be similar to what ESXi already supports for RAM deduplication (page sharing). Question: Is there any way to easily do this on ESXi 4? I already share the portage tree via NFS but this would not work for the rootfs.

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  • Setting up a git repository on a server

    - by lostInTransit
    Hi I read through the other git questions here but couldn't really follow whether they are trying to do the same thing as I am. So if you find any duplicates, please let me know. I have a central server with SSO installed. All my machines are connected through the lan to this server. I have also setup a remote git repository on this server. Now what I'd like to do is make the server act as a central repository. All my employees can commit their code to the server and the server pushes it to the remote git repository. Also can I integrate it with SSO in any way? Can someone please help me out with this process? I am new to git and still learning how to use it effectively. So a step-by-step process or an existing document which I can refer to for this? Thanks.

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  • NHibernate : recover session after connection lost

    - by Catalin DICU
    I'm using NHibernate with SQL Server 2005 in a WPF client application. If I manually stop the SQL Server service and then restart it the session doesn't automatically reconnect. So far I'm doing this witch seems to work : try { using (ITransaction transaction = this.Session.BeginTransaction()) { // some select here } }catch(Exception ex) { if(this.Session.Connection.State == ConnectionState.Closed) { try { this.Session.Connection.Open(); } catch (Exception) { } } } Is there a better way ?

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  • Get the "source network address" in Event ID 529 audit entries on Windows XP

    - by Make it useful Keep it simple
    In windows server 2003 when an Event 529 (logon failure) occures with a logon type of 10 (remote logon), the source network IP address is recorded in the event log. On a windows XP machine, this (and some other details) are omitted. If a bot is trying a brute force over RDP (some of my XP machines are (and need to be) exposed with a public IP address), i cannot see the originating IP address so i don't know what to block (with a script i run every few minutes). The DC does not log this detail either when the logon attempt is to the client xp machine and the DC is only asked to authenticate the credentials. Any help getting this detail in the log would be appreciated.

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  • When using delegates, need better way to do sequential processing

    - by Padawan
    I have a class WebServiceCaller that uses NSURLConnection to make asynchronous calls to a web service. The class provides a delegate property and when the web service call is done, it calls a method webServiceDoneWithXXX on the delegate. There are several web service methods that can be called, two of which are say GetSummary and GetList. The classes that use WebServiceCaller initially need both the summary and list so they are written like this: -(void)getAllData { [webServiceCaller getSummary]; } -(void)webServiceDoneWithGetSummary { [webServiceCaller getList]; } -(void)webServiceDoneWithGetList { ... } This works but there are at least two problems: The calls are split across delegate methods so it's hard to see the sequence at a glance but more important it's hard to control or modify the sequence. Sometimes I want to call just GetSummary and not also GetList so I would then have to use an ugly class-level state variable that tells webServiceDoneWithGetSummary whether to call GetList or not. Assume that GetList cannot be done until GetSummary completes and returns some data which is used as input to GetList. Is there a better way to handle this and still get asynchronous calls? Update based on Matt Long's answer: Using notifications instead of a delegate, it looks like I can solve problem #2 by setting a different selector depending on whether I want the full sequence (GetSummary+GetList) or just GetSummary. Both observers would still use the same notification name when calling GetSummary. I would have to write two separate methods to handle GetSummaryDone instead of using a single delegate method (where I would have needed some class-level variable to tell whether to then call GetList). -(void)getAllData { [[NSNotificationCenter defaultCenter] addObserver:self              selector:@selector(getSummaryDoneAndCallGetList:)                  name:kGetSummaryDidFinish object:nil];     [webServiceCaller getSummary]; } -(void)getSummaryDoneAndCallGetList { [NSNotificationCenter removeObserver] //process summary data [[NSNotificationCenter defaultCenter] addObserver:self              selector:@selector(getListDone:)                  name:kGetListDidFinish object:nil];     [webServiceCaller getList]; } -(void)getListDone { [NSNotificationCenter removeObserver] //process list data } -(void)getJustSummaryData { [[NSNotificationCenter defaultCenter] addObserver:self              selector:@selector(getJustSummaryDone:) //different selector but                  name:kGetSummaryDidFinish object:nil]; //same notification name     [webServiceCaller getSummary]; } -(void)getJustSummaryDone { [NSNotificationCenter removeObserver] //process summary data } I haven't actually tried this yet. It seems better than having state variables and if-then statements but you have to write more methods. I still don't see a solution for problem 1.

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  • how to stream audio and video files, but use any media player on Windows (without using Windows file

    - by RamyenHead
    I want to access and play media files on machine S (Windows XP) from machine C (Windows XP). Using Windows File Sharing ("share this folder" stuff), if it works, I would share the folder containing media files on machine S, and I would be able to play media files, sitting in front of C, using any media player I want. Windows somehow ensures that the remote files behave like local files. But Windows file sharing won't work for me, is there any alternative? If two machines were both Linux, I would install an SSH server on S and use Nautilus from C to access and play media files. The reason why I can't use Windows file sharing is, my campus use two different subnets, I have S and C on different subnets and it seems that the firewall governing the whole network in campus doesn't allow file sharing between different subnets. I tried changing Windows Firewall settings on S to allow C in, it still wouldn't work, so it must be the other firewall.

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  • Stack and Queue, Why?

    - by Alon
    Why and when should I use stack or queue data structures instead of arrays/lists? Can you please show an example for a state thats it'll be better if you'll use stack or queue? Thanks.

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  • How do you enable multi-core virtualization in Windows 8 Pro?

    - by Greg B
    I've just got a new Dell Vostro 470 with a quad core (8 threads) i7 3770 and I'm trying to run virtual machines on it, which works fine, except if I want to assign multiple cores to a VM. I've checked the bios which states Intel Virtualization Technology [Enabled], but both Hyper-V and VirtualBox will only allow me to assign a single core. If I run the Intel Processor Identification Utility on the host OS it tells me that Intel Virtualization Technology isn't supported by the processor, but according to the Intel website, it is. So whats going on? Have Dell clipped the i7's wings? Is there some config in Windows I need to change?

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  • Windows Server Task Scheduler: Running scheduled executable fail-safe?

    - by Mikael Koskinen
    I have an executable which I've scheduled to run once in every five minutes (using Window's built-in Task Scheduler). It's crucial that this executable is run because it updates few time critical files. But how can I react if the virtual server running the executable goes down? At no point there shouldn't be more than 15 minutes break between the runs. As I'm using Windows Server and its Task Scheduler, I wonder is it possible to create some kind of a cluster which automatically handles the situation? The problem is that the server in question is running on Windows Azure and I don't think I can create actual clusters using the virtual machines. If the problem can be solved using a 3rd party tool, that's OK too. To generalize the question a little bit: How to make sure that an executable is run once in every 5 minutes, even if there might be server failures?

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  • Bridge and OpenVPN with shorewall

    - by Javier Martinez
    I have this scenario and everything it's working OK, but I want to configure my Shorewall and I can't do it. My interfaces are: br0 (bridge of eth0) tun0 (OpenVPN) vnet* (each one of bridged interfaces with public IP's) Public Main IP: 188.165.X.Y OpenVPN IP's: 172.28.0.x Bridge: public ip's So, I have the next configuration for shorewall: /etc/shorewall/zones #ZONE TYPE OPTIONS IN OUT # OPTIONS OPTIONS fw firewall inet ipv4 road ipv4 /etc/shorewall/interfaces #ZONE INTERFACE BROADCAST OPTIONS inet br0 detect routeback road tun+ detect routeback /etc/shorewall/policy #SOURCE DEST POLICY LOG LIMIT: CONNLIMIT: # LEVEL BURST MASK $FW all ACCEPT inet $FW DROP info road all DROP inet road DROP /etc/shorewall/tunnels #TYPE ZONE GATEWAY GATEWAY # ZONE openvpnserver:1194 inet 0.0.0.0/0 The problem is that even with shorewall running I am able to ping or connect to the virtual machines behind the bridge

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  • OS X Server - setting up a share for network home directories + fast user switching

    - by sohocoke
    I'm nearly finished setting up my Open Directory master to allow users to be managed centrally and logged in on any of the client machines at home. I found discussion suggesting that using an AFP share for the 'Users' automount would result in network users (cf. users defined locally, or Portable Home Directory users) are unable to use fast user switching, as the first user logging in would trigger the automount and mount the 'Users' share with his permissions, preventing further users from using the mount. I've also found some suggestions to configure autofs such that the 'Users' share is mounted prior to any user logging in, but not great amounts of details along these lines. I'd greatly appreciate some instructions to set up autofs - ideally, on the OpenDirectory server rather than each client's etc/fstab or equivalent location, so that it isn't required per every client machine - to get fast user switching working with network users.

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  • vpn/Openvpn as a cloud service

    - by 8pipe
    I am working on creating a small cloud (any number of EC2 instances that can be deployed based on load) implementing a VPN as a service for the company I'm working for. This is basically a project gathering together various vpn resources under one aegis as a cloud based service. As a user of openvpn, I'm somewhat familiar with being able to connect, but I'm looking for resources to start this project. Essentially I need to be able to: run a certificate authority and manage keys to distribute to coworkers build an ami that handles openvpn as a service balance the load if necessary among machines instances as needed Any suggestions for tutorials, things to avoid, roadblocks I might not be seeing from a novice perspective, etc. or just help in visualizing this is appreciated.

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  • Should I anticipate any problems trying to use the same SSL Cert on 2 computers (primary, backup)?

    - by Matt
    We have a production machine running IIS6 with a wildcard SSL certificate. The certificate that was installed is not exportable. We want to upgrade the system to IIS7. As part of this venture, we're creating a backup/failover server that will serve the exact same websites - when we take the primary down for upgrade, the secondary will take over. As such, the secondary also needs the SSL certificate. However, since the certificate was not exportable, this means re-keying it from Go Daddy. Per http://help.godaddy.com/article/867, I know that by re-keying the certificate the original will stop working. I'm still pretty new to SSL certificates, so are there any problems I should anticipate when installing the same SSL certificate on 2 different machines?

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  • Java Swing - Problem in disabling JCheckbox

    - by Yatendra Goel
    I am disabling a JCheckbox and then enabling it with the help of setEnabled(...) method. But the problem is if I disable a unselected checkbox, then it becomes selected after I enable it. I want all of them to have the same state after being enabled that they had before being disabled.

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  • Can I run AD commands from a standard PowerShell script?

    - by Ben
    I am putting together a script to run post-sysprep. It should check if the machine is on the network, and if it is then it should query AD to see if a computer account exists with it's service tag (we're using these as the hostnames of the machines.) If it does exist, it should delete the account and rejoin the machine to the domain. I have got the majority of the script running, but need to run the following: Remove-ADComputer -Identity $distinguishedName How can I run this from the "standard" powershell environment? I don't want to use the AD module. (By the way - I'm on a mixed mode 2000/03 domain as we are in the process of upgrading to 2008) I'm new to PowerShell so be gentle if I'm completely missing the point! Thanks, Ben

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  • esxi 5.1 - copy paste host config doesn't work?

    - by w--
    I followed these instructions for esxi 5.1 to enable copy paste from the host config. (search for "To enable this option for all the virtual machines in the ESX/ESXi host:") http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1026437 But copy and paste doesn't work for new VMs or existing VMs. Did I do something wrong somewhere? I've rebooted VMs and even rebooted host. I can confirm that if I do a per VM configuration, it works. Just not a central host config. Here is a screenshot of my /etc/vmware/config file

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  • Sun Java keytool importing EV certificates into a single keystore

    - by ss0
    At my current job we are using tomcat, customers have custom web portals setup on their own local machines. EV certs are new to me, they have 2 part intermediary and a primary certificate. For our product to work it appears I need to get all three parts installed under a single keystore entry. How can I roll all three parts into a single x.509 compliant file for import? They syntax I am using is as follows: /blah/system/j2sdk/bin/keytool -import -alias foo -keystore /zix/system/jdk1.5.0_06/jre/lib/security/cacerts -file certname.pem -trustcacerts where foo = the keystore name and certname.pem is the main cert. I have tried importing the intermediate certs under their own names into the keystore and I don't know if it's just the product I have to work with (not vanilla tomcat) or what but it doesn't see those. I have seen a working system and all three certs were under the single keystore alias. Anyone have any ideas?

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  • Why does Event intent in android not return a result?

    - by dhaval
    I am creating a event using Intent intent = new Intent(Intent.ACTION_EDIT); intent.setType("vnd.android.cursor.item/event"); And invoking the intent using startActivityForResult(intent, Constants.LINK_CALENDER); There is nothing returned to call in onActivityResult(int requestCode, int resultCode, Intent data) It always returns data=null ie., returned intent result is always null. I am trying to retrieve the "Done/Revert" state of calender event just created and some identity so that i can open the event again in future from elsewhere in code.

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  • Can a 32-bit RHEL4 userland work with a 64-bit kernel?

    - by James
    Is there a way to change an i386 RHEL4 machine to run an amd64 kernel, but ensure that it still builds software into same i386 binaries? On Debian this seems quite straightforward: just install an amd64 kernel (worst case, build one like this guy: http://www.debian-administration.org/users/jonesy/weblog/1) and prefix everything with "linux32". Then everything that considers uname -m will be unchanged, I just need to handle the few cases that consider uname -r. What is the Red Hat equivalent? Is the only way a full 64-bit installation on another disk and then chrooting back to the 32-bit system before anyone builds anything? (Even the best examples of that seem to be Debian-based.) Background: We make a large system that runs on (a variant of) i386 RHEL4. However, some of the larger RHEL build machines now have enough RAM that they might benefit from going 64-bit (for the kernel and maybe some of the bigger build steps). Our build system doesn't support cross-compilation.

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  • How to retain headers for all the pages of an exported word document in php?

    - by udaya
    Hi I exported data from php page to word document but the problm is the header is not available in all pages I got the same problem while i am exporting the datas to pdf but i got the result for that one by using fpdf library In pdf i got the results like this ex page1 slno name 1 udaya 2 sankar In page 2 slno name 3 chendu 4 Akila I want the same kind of result in word how to get that This is the function i used function changeDetails() { $bType = $this->input->post('textvalue'); if($bType == "word") { $this->load->library('table'); $data['countrytoword'] = $this->AddEditmodel1->export(); $this->table->set_heading('Name','Country','State','Town'); $out = $this->table->generate($data['countrytoword']); header("Content-Type: application/vnd.ms-word"); header("Expires: 0"); header("Cache-Control: must-revalidate, post-check=0, pre-check=0"); header("Content-disposition: attachment; filename=$cur_date.doc"); echo '<br><br>'; echo '<strong>CountryList</strong><br><br>'; print_r($out); } } <? if(isset($countrytoword)) { ?> <table align="center" border="0"> <tr> <td> Name </td> <td> Country </td> <td> State </td> <td> Town </td> </tr> <? foreach($countrytoword as $dsasffd) { ?> <tr> <td><?= $dsasffd['dbName'] ?></td> <td><?= $dsasffd['dbCountry']; ?></td> <td><?= $dsasffd['dbState']; ?></td> <td><?= $dsasffd['dbTown']; ?></td> <? } } ?> </tr> </table>

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  • Setting dijit.Tree cookie for all pages

    - by peirix
    I'm using the same dijit.Tree view over several pages in our application, and I'd like to have the cookie saved for the server name, instead of the folder name. Right now I've got 3 pages and 3 cookies, which each hold their own information on the state of the Tree, which is kinda annoying. Any ways to accomplish this? The only thing I've found on cookies in the API, is that I can set the cookieName and turn cookies on/off.

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  • Speeding up ROW_NUMBER in SQL Server

    - by BlueRaja
    We have a number of machines which record data into a database at sporadic intervals. For each record, I'd like to obtain the time period between this recording and the previous recording. I can do this using ROW_NUMBER as follows: WITH TempTable AS ( SELECT *, ROW_NUMBER() OVER (PARTITION BY Machine_ID ORDER BY Date_Time) AS Ordering FROM dbo.DataTable ) SELECT [Current].*, Previous.Date_Time AS PreviousDateTime FROM TempTable AS [Current] INNER JOIN TempTable AS Previous ON [Current].Machine_ID = Previous.Machine_ID AND Previous.Ordering = [Current].Ordering + 1 The problem is, it goes really slow (several minutes on a table with about 10k entries) - I tried creating separate indicies on Machine_ID and Date_Time, and a single joined-index, but nothing helps. Is there anyway to rewrite this query to go faster?

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