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• Windows Server 2008 - inexplicable system time jumps/glitches/inaccuracies

  - by Nathan Ridley

  I'm running a production web server on Windows Server 2008. On this server I have a database which logs certain user actions, but every now and again I inexplicably get database entries which, according to the record ID and the records immediately before and after, have the wrong time logged against them (7 days+ too old). For example, record ID 1001 will be for Dec 7, 11pm, 1002 will be for Dec 7, 11:01pm, then 1003 will be for Nov 28, 1:38am, then the next will be back on track again. The problem seems to occur in random records (or 2-3 records in a row) and crops up once every few days. This is absolutely baffling because there is only one place in the application that assigns this date/time value and it's simply the system UTC date. I have been synchronizing the system time to time-a.nist.gov (which I read in another article was a bit more reliable than the default time.windows.com) and it seems to occasionally get out of time anyway (3-4 minutes), but I'm speculating that occasionally the time server has a temporary glitch where the date changes to a drastically wrong value for a short space of time, then changes back. Either that, or the motherboard clock battery is screwed and the reason the time momentarily changes is that the motherboard loses the time and then the time synchronization puts it back again. Could either of my suspicions be right? Should I turn off time synchronization for a production server? Assigning dates to an event log where the dates are up to 2 weeks prior to the actual date is a severe problem I can't have when the next version of my application is released. Any suggestions or advice would be appreciated.

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• ??GoldenGate?LAG???

  - by Liu Maclean(???)

  GGSCI????LAG?? ????????????????Oracle?redo????online redo logfile? ? Replicat????????????????? ???????? ????,?????????????????LAG; ????????????????REPLICAT??apply???????????? OGG????RANGE??????????,????????REPLICATE??APPLY? OGG??MAXTRANSOPS???????? LAG?????????: ?Extract?????redolog????TRAIL?REMOTE HOST ????datapump???extract trail????????????REMOTE HOST ?collector?????????????????LOCAL TRAIL ?REPLICAT??LOCAL TRAIL???????? ?????????GGSCI?INFO?STATUS??????LAG,???SEND ???,LAG?????LAG?????: INFO??????LAG???SEND??????????? INFO?????LAG???MANAGER????????checkpoint SEND <OBJECT>, lag???LAG???<OBJECT>???????????? LAG?????????????????Kilobytes??? ????LAG??? ????????????? ? EXTRACT/PUMP/REPLICAT???????? ?2?????????, ???? LAG???EXTRACT??????? ??EXTRACT/PUMP/REPLICAT??????????????? REAL TIME,???LAG????? ?????????????? ????????REDO LOG?????????,?LAG???ER???????,?????????????? ??????,STOP EXTRACT?????????????????LAG,????EXTRACT?????,??EXTRACT????????? ????REDO LOG???? ?EXTRACT??????????????????? GGSCI (XIANGBLI-CN) 27> stop load2 Sending STOP request to EXTRACT LOAD2 … Request processed. GGSCI (XIANGBLI-CN) 28> start load2 Sending START request to MANAGER … EXTRACT LOAD2 starting GGSCI (XIANGBLI-CN) 31> info load2 EXTRACT    LOAD2     Last Started 2012-09-18 20:26   Status RUNNING Checkpoint Lag       00:04:34 (updated 00:00:08 ago) Log Read Checkpoint  Oracle Redo Logs 2012-09-18 20:21:32  Seqno 44, RBA 13750272 SCN 0.1845479 (1845479) GGSCI (XIANGBLI-CN) 35> lag load2 Sending GETLAG request to EXTRACT LOAD2 … Last record lag: 130 seconds. At EOF, no more records to process. GGSCI (XIANGBLI-CN) 36> info load2 EXTRACT    LOAD2     Last Started 2012-09-18 20:26   Status RUNNING Checkpoint Lag       00:00:00 (updated 00:00:02 ago) Log Read Checkpoint  Oracle Redo Logs 2012-09-18 20:27:33  Seqno 44, RBA 13817856 SCN 0.1845671 (1845671) ?????? Last record lag ? Checkpoint Lag ???? EXTRACT/PUMP/REPLICAT ?????????????(catch up), ???? ?????????????GB?redo???,??????EXTRACT/PUMP/REPLICAT ????????? ???INFO?LAG???checkpoint?,????????????Long Running Transactions (LRTs),??????????COMMIT? ????????????????????????COMMIT?????? ????EXTRACT/PUMP/REPLICAT???????????????????????commit????? ??REPLICAT????MAXTRANSOPS ?????LAG?

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• Real time video stream from camera via server to Iphone

  - by devdevdev

  Hi I want to create an Iphone app that can display real time video from a camera. The intended setup is. Camera connected to Mac Mini delivering real time video to Iphone over local network. The Iphone doesn't need to display high quality or use a high frame rate, but it has to be real time. Max 1 sec delay. I've been searching a lot for a solution, but so far I have not found a resonable one. HTTP Live Stream is not a solution due to the delay. Any suggestions?

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• How to make a legacy system time-zone sensitive?

  - by Jerry Dodge

  I need to implement time zones in a very large and old Delphi system, where there's a central SQL Server database and possibly hundreds of client installations around the world in different time zones. The application already interacts with the database by only using the date/time of the database server. So, all the time stamps saved in both the database and on the client machines are the date/time of the database server when it happened, never the time of the client machine. So, when a client is about to display the date/time of something (such as a transaction) which is coming from this database, it needs to show the date/time converted to the local time zone. This is where I get lost. I would naturally assume there should be something in SQL to recognize the time zone and convert a DateTime field dynamically. I'm not sure if such a thing exists though. If so, that would be perfect, but if not, I need to figure out another way. This Delphi system (multiple projects) utilizes the SQL Server database using ADO components, VCL data-aware controls, and QuickReports (using data sources). So, there's many places where the data goes directly from the database query to rendering on the screen, without any code to actually put this data on the screen. In the end, I need to know when and how should I get the properly converted time? What is the proper way to ensure that I handle Dates and Times correctly in a legacy application?

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• Eliminating Downtime During Database Upgrades: A Customer Case Study

  - by irem.radzik(at)oracle.com

  Planned outages, such as database, OS, hardware upgrades and migrations, are a fact of life. Even though they are "planned" and many of them are performed during "off business hours", they can still interrupt operations-- especially for global operations and online businesses. For this reason many IT organizations postpone these critical infrastructure improvement projects, which in turn result in delays in advancing business operations. This week, on Thursday January 13th, we will host a free webcast on this topic, and will feature Oracle GoldenGate's customer Atmos Energy. Atmos Energy implemented Oracle GoldenGate for eliminating downtime during their database upgrade from Oracle Database 8.1.7 to Oracle Database 11.1.0.7. Jos Francis, Lead DBA for Atmos, and Ronald Nedd, Sr. DBA for Atmos, will be presenting their database upgrade project and their solution architecture. Join us at this live webcast and hear from our customer and product management how to eliminate planned outages with Oracle GoldenGate's real-time, heterogeneous data replication capabilities.

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• Start Time & Calculated Column Wonkiness in a SharePoint Event Calendar

  - by _zekeMouseOver

  I was creating some custom rollups on some of our event calendars and came across a very odd bug when trying to grab only the date component of the built-in Start Time field. One's first inclination will be to create a calculated column and give it the formula... =[Start Time]... and then assign its output type to be "Date Only." This works well until a user adds an All Day Event. For reasons unexplainable, the All Day Event flag causes your =[Start Time] to display the date minus one day. Here is an example of this in action:  Start Date and Time, Duration, Start Date Value and Start Day are all calculated fields. Notice how the Start Date and Time (=[Start Time]) is reporting 6:00PM of the previous day. The Start Date Value (=[Start Time] - Output Type: Number) confirms this (.75 = 6:00 PM.) Curiously enough, the Duration (=[End Time]-[Start Time]) is properly reporting the duration between 12:00AM and 11:59PM. Why? I don't know. Perhaps it's somehow bound to the regional settings on the site, but I'm not interested in changing a global site setting for the sake of one calculated field.With this information at our disposal, our calculated column to display the date part of the start date needs to be modified to add one day to the [Start Time] field if an All Day Event is selected. To determine this, we use the Duration above to assume the item is an all-day event and change our formula to be:=IF(TEXT(([End Time]-[Start Time])-TRUNC(([End Time]-[Start Time]),0),"0.000000000")="0.999305556",[Start Time] + 1, [Start Time])This will work, but what happens when the user de-selects the "All Day Event" checkbox? The duration stays the same, but all other values begin reporting the correct time: Since our formula above is strictly based on an expected duration, it will add one to the correct date, causing the date 5/11/2010 to appear. Notice though that the raw value of the start time (in this case) is a non-fractional number (40,308) whereas the all-day event was being represented as 6:00 PM (.75) of the previous day. We can use this to add one more nested branch of logic to our calculation:=IF(TEXT(([End Time]-[Start Time])-TRUNC(([End Time]-[Start Time]),0),"0.000000000")="0.999305556",IF([Start Time]=ROUND([Start Time],0),[Start Time],[Start Time]+1),[Start Time]) I feel somewhat... dirty about having to resort to this kind of calculation in what SHOULD have been a simple =[Start Time] to extract the date part of the Start Time field, but there you have it. Make sure to shower extra longer after having used it.

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• Real Time LaTeX?

  - by shoosh

  I'm looking for an application in which I can write pure LaTeX in one half of the screen and on the other half to see the compiled document in real time. This seems really like an obvious way to do LaTeX authoring but it doesn't look like any software is able to do it. LyX is not what I'm looking for. I want to edit the actual LaTeX and see it rendered in real time. Why isn't this already being done somewhere?

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• Who Uses Real Time Java?

  - by Jon

  I noticed that Real Time Java 2.2 was released back in September, seems to have come a long way from when I last looked at it. However, does anybody know of any real world uses, commercial or academic to date? http://java.sun.com/javase/technologies/realtime/index.jsp

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• Real-time Java graph / chart library?

  - by Joonas Pulakka

  There was an earlier thread on Java graph or chart library, where JFreeChart was found to be quite good, but, as stated in its FAQ, it's not meant for real-time rendering. Can anyone recommend a comparable library that supports real-time rendering? Just some basic xy-rendering - for instance, getting a voltage signal from data acquisition system and plotting it as it comes (time on x-axis, voltage on y-axis).

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• OWB 11gR2 &ndash; Flexible and extensible

  - by David Allan

  The Oracle data integration extensibility capabilities are something I love, nothing more frustrating than a tool or platform that is very constraining. I think extensibility and flexibility are invaluable capabilities in the data integration arena. I liked Uli Bethke's posting on some extensibility capabilities with ODI (see Nesting ODI Substitution Method Calls here), he has some useful guidance on making customizations to existing KMs, nice to learn by example. I thought I'd illustrate the same capabilities with ODI's partner OWB for the OWB community. There is a whole new world of potential. The LKM/IKM/CKM/JKMs are the primary templates that are supported (plus the Oracle Target code template), so there is a lot of potential for customizing and extending the product in this release. Enough waffle... Diving in at the deep end from Uli's post, in OWB the table operator has a number of additional properties in OWB 11gR2 that let you annotate the column usage with ODI-like properties such as the slowly changing usage or for your own user-defined purpose as in Uli's post, below you see for the target table SALES_TARGET we can use the UD5 property which when assigned the code template (knowledge module) which has been modified with Uli's change we can do custom things such as creating indices - provides The code template used by the mapping has the additional step which is basically the code illustrated from Uli's posting just used directly, the ODI 10g substitution references also supported from within OWB's runtime. Now to see whether this does what we expect before we execute it, we can check out the generated code similar to how the traditional mapping generation and preview works, you do this by clicking on the 'Inspect Code' button on the execution units code template assignment. This then  creates another tab with prefix 'Code - <mapping name>' where the generated code is put, scrolling down we find the last step with the indices being created, looks good, so we are ready to deploy and execute. After executing the mapping we can then use the 'Audit Information' panel (select the mapping in the designer tree and click on View/Audit Information), this gives us a view of the execution where we can drill into the tasks that were executed and inspect both the template and the generated code that was executed and any potential errors. Reflecting back on earlier versions of OWB, these were the kinds of features that were always highly desirable, getting under the hood of the code generation and tweaking bit and pieces - fun and powerful stuff! We can step it up a bit here and explore some further ideas. The example below is a daisy-chained set of execution units where the intermediate table is a target of one unit and the source for another. We want that table to be a global temporary table, so can tweak the templates. Back to the copy of SQL Control Append (for demo purposes) we modify the create target table step to make the table a global temporary table, with the option of on commit preserve rows. You can get a feel for some of the customizations and changes possible, providing some great flexibility and extensibility for the data integration tools.

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• ODI 11g – Expert Accelerator for Model Creation

  - by David Allan

  Following on from my post earlier this morning on scripting model and topology creation tonight I thought I’d add a little UI to make those groovy functions a little more palatable. In OWB we have experts for capturing user input, with the groovy console we open up opportunities to build UI around the scripts in a very easy way – even I can do it;-) After a little googling around I found some useful posts on SwingBuilder, the most useful one that I used for the dialog below was this one here. This dialog captures user input for the technology and context for the model and logical schema etc to be created. You can see there are a variety of interesting controls, and its really easy to do. The dialog captures the users input, then when OK is pressed I call the functions from the earlier post to create the logical schema (plus all the other objects) and model. The image below shows what was created, you can see the model (with typo in name), the model is Oracle technology and references the logical schema ORACLE_SCOTT (that I named in dialog above), the logical schema is mapped via the GLOBAL context to the data server ORACLE_SCOTT_DEV (that I named in dialog above), and the physical schema used was just the user name that I connected with – so if you wanted a different user the schema name could be added to the dialog. In a nutshell, one dialog that encapsulates a simpler mechanism for creating a model. You can create your own scripts that use dialogs like this, capture input and process. You can find the groovy script for this is here odi_create_model.groovy, again I wrapped the user capture code in a groovy function and return the result in a variable and then simply call the createLogicalSchema and createModel functions from the previous posting. The script I supplied above has everything you will need. To execute use Tools->Groovy->Open Script and then execute the green play button on the toolbar. Have fun.

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• Applications created with real basic (real studio) for mac or windows

  - by sarmenhbbbb

  i have search high and low on the internet and it does not exist. i cant find a single website that shows a few applications created with realbasic. i saw a video that shows the user going to realbasic.com/community/ and it shows a load of applications created using realbasic. would anyone know where i can find this information. that link that i gave doesnt even work by them.

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• Having trouble with time.sleep

  - by Waterfox

  When I run, for example: print("[",end=" ") time.sleep(1) print("=",end=" ") time.sleep(1) print("=",end=" ") time.sleep(1) print("=",end=" ") time.sleep(1) print("=",end=" ") time.sleep(1) print("=",end=" ") time.sleep(1) print("=",end=" ") time.sleep(1) print("=",end=" ") time.sleep(1) print("=",end=" ") time.sleep(1) print("=",end=" ") time.sleep(1) print("=",end=" ") time.sleep(1) print("]",end=" ") Nothing happens for 10 seconds, then the whole [ = = = = = = = = = = ] appears. How can I prevent that so that it can act as a sort of progress bar?

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• negative time for a ping echo reply

  - by Mario

  I was happily pinging in the net when suddenly: Pinging X with 32 bytes of data: Reply from .235: bytes=32 time=1444ms TTL=41 Reply from .235: bytes=32 time=1767ms TTL=41 Reply from .235: bytes=32 time=1531ms TTL=41 Reply from .235: bytes=32 time=-1198187ms TTL=41 Ping statistics for .235: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), Approximate round trip times in milli-seconds: Minimum = 1444ms, Maximum = -1198187ms, Average = 1073443462ms A negative time for the reply. I checked wireshark and it had the same values: Time delta from previous displayed frame: -1198.187867000 seconds Time since reference or first frame: -1179.935038000 seconds I didn't change the time of the machine while pinging. This was made in my local network at home, from a XP VM in windows 7. So I blame the VM (virtualbox). But I was wondering if this strange behaviour (to me) could have a reason, or if any of you have seen this before. Thank you bye.

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• Windows 7 loses correct time zone upon reboot

  - by Android Eve

  I have a standard PC running Windows 7 Ultimate (64-bit). For some reason, it refuses to keep the correct time zone (the BIOS battery is OK) when restarted. Note (1): The Time zone is correct. The "Internet Time" tab also shows "this computer is set to automatically synchronize with 'time.windows.com'. When I click the 'Change settings...' button, the 'Synchronize with an Internet time server' checkbox is checked. Still, upon reboot, the time is skewed by 6 hours... and doesn't correct itself even after waiting hours for this "automatically synchronize" to occur. Note (2): The BIOS time is set to local (i.e. not UTC). When I restart Windows 7 without booting to the other OS installed in dual-boot config (Ubuntu Linux), it seems to correctly remember the time. This may explain immediate time upon reboot, but it doesn't explain why Windows 7 won't automatically 'Synchronize with an Internet time server' even after an hour. Why is this happening and how do I correct this?

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• Does my approach for building a real time monitoring system make sense? [closed]

  - by sameer

  I am developing an application that will display a dashboard that will display data from different SQL databases. This needs to happen in almost real time, our refresh time is about 5 minutes. My approach so far is: Develop a Windows service to accumulate the data from various SQL Server instances. Persist those details into a SQL DB, from which the dashboard will display them on the web page. Trigger fetching of data from the Windows service will every x minutes. The details of the SQL Server instances will be stored in the SQL DB which the Windows service will be referring. Does my approach make sense?

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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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• Real world use cases of bitwise operators

  - by Olivier Lalonde

  What are some real world use cases of the following bitwise operators? AND XOR NOT OR

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• Lucene real-time indexing?

  - by Kip

  What is the best way to achieve Lucene real-time indexing?

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• [C++] Real time plotting/data logging

  - by Paul

  I'm going to write a program that plots data from a sensor connected to the computer. The sensor value is going to be plotted as a function of the time (sensor value on the y-axis, time on the x-axis). I want to be able to add new values to the plot in real time. What would be best to do this with in C++? Edit: And by the way, the program will be running on a Linux machine

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• Precision problems of real numbers in Fortran

  - by saladoil

  I've been trying to use Fortran for my research project, with the GNU Fortran compiler (gfortran), latest version, but I've been encountering some problems in the way it processes real numbers. If you have for example the code: program test implicit none real :: y = 23.234, z z = y * 100000 write(*,*) y, z end program You'll get as output: 23.23999 2323400.0. I find this really strange. Can someone tell me what's exactly happening here? Looking at z I can see that y does retain its precision, so for calculations that shouldn't be a problem I suppose. But why is the output of y not exactly the same as the value that I've specified, and what can I do to make it exactly the same?

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• Oracle Warehouse Builder és Enterprise ETL

  - by Fekete Zoltán

  Friss és ropogós az adatlap!!! Fogyasszátok egészséggel: ODI Enterprise Edition: Warehouse Builder Enterprise ETL white paper. A jó hír: minden megvásárolt Oracle Database-hez ingyenese használható az Oracle Warehouse Builder alap (core) funkcionalitása. Mi is az az OWB core funkcionalitás, és mit használhatunk az opciókban? Az Enterprise ETL funkcionalitás az Oracle Data Integrator Enterprise Edition licensz részeként érheto el az OWB-hez. Azok a funkciók, amik csak az ODI EE licensszel érhetok el (a korábbi OWB Enterprise ETL opció is ennek a része) megtekinthetok itt is a szöveg alján. Ezek: - Transportable ETL modules, multiple configurations, and pluggable mappings - Operators for pluggable mapping, pluggable mapping input signature, pluggable mapping output signature - Design Environment Support for RAC - Metadata change propagation - Schedulable Mappings and Process Flows - Slowing Changing Dimensions (SCD) Type 2 and 3 - XML Files as a target - Target load ordering - Seeded spatial and streams transformations - Process Flow Activity templates - Process Flow variables support - Process Flow looping activities such as For Loop and While Loop - Process Flow Route and Notification activities - Metadata lineage and impact analysis - Metadata Extensibility - Deployment to Discoverer EUL - Deployment to Oracle BI Beans catalog Tehát ha komolyabb környezetben szeretném használni az OWB-t, több környezetbe deployálni, stb, akkor szükség van az ODI EE licenszre is. ODI Enterprise Edition: Warehouse Builder Enterprise ETL white paper.

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• Real World Java EE Patterns by Adam Bien

  - by JuergenKress

  Rethinking Best Practices, A book about rethinking patterns, best practices, idioms and Java EE Real World Java EE Patterns - Rethinking Best Practices discusses patterns and best practices in a structured way, with code from real world projects. This book covers: an introduction into the core principles and APIs of Java EE 6, principles of transactions, isolation levels, CAP and BASE, remoting, pragmatic modularization and structure of Java EE applications, discussion of superfluous patterns and outdated best practices, patterns for domain driven and service oriented components, custom scopes, asynchronous processing and parallelization, real time HTTP events, schedulers, REST optimizations, plugins and monitoring tools, and fully functional JCA 1.6 implementation. Real World Java EE Night Hacks - Dissecting the Business Tier will not only help experienced developers and architects to write concise code, but especially help you to shrink the codebase to unbelievably small sizes :-). Order 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. BlogTwitterLinkedInMixForumWiki Technorati Tags: Adam Bien,Real World Java,Java,Java EE,WebLogic Community,Oracle,OPN,Jürgen Kress

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• Time not propagating to machines on Windows domain

  - by rbeier

  We have a two-domain Active Directory forest: ourcompany.com at the root, and prod.ourcompany.com for production servers. Time is propagating properly through the root domain, but servers in the child domain are unable to sync via NTP. So the time on these servers is starting to drift, since they're relying only on the hardware clock. WHen I type "net time" on one of the production servers, I get the following error: Could not locate a time-server. More help is available by typing NET HELPMSG 3912. When I type "w32tm /resync", i get the following: Sending resync command to local computer The computer did not resync because no time data was available. "w32tm /query /source" shows the following: Free-running System Clock We have three domain controllers in the prod.ourcompany.com subdomain (overkill, but the result of a migration - we haven't gotten rid of one of the old ones yet.) To complicate matters, the domain controllers are all virtualized, running on two different physical hosts. But the time on the domain controllers themselves is accurate - the servers that aren't DCs are the ones having problems. Two of the DCs are running Server 2003, including the PDC emulator. The third DC is running Server 2008. (I could move the PDC emulator role to the 2008 machine if that would help.) The non-DC servers are all running Server 2008. All other Active Directory functionality works fine in the production domain - we're only seeing problems with NTP. I can manually sync each machine to the time source (the PDC emulator) by doing the following: net time \\dc1.prod.ourcompany.com /set /y But this is just a one-off, and it doesn't cause automated time syncing to start working. I guess I could create a scheduled task which runs the above command periodically, but I'm hoping there's a better way. Does anyone have any ideas as to why this isn't working, and what we can do to fix it? Thanks for your help, Richard

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• Weird fluctuating time on a XEN linux guest

  - by Vin-G

  I have a weird problem with some servers here at work. We have a few XEN guests who's current time fluctuates. # date;date;date;date;date;date;date Thu Feb 25 16:00:40 PHT 2010 Thu Feb 25 16:00:48 PHT 2010 Thu Feb 25 16:00:40 PHT 2010 Thu Feb 25 16:00:48 PHT 2010 Thu Feb 25 16:00:40 PHT 2010 Thu Feb 25 16:00:48 PHT 2010 Thu Feb 25 16:00:40 PHT 2010 As seen above, the time fluctuates between 16:00:48 and 16:00:40, which is problematic for us since computing for time differences in some of our scripts becomes inaccurate (ex. what should be a few ms differences becomes some few second differences, and even sometimes, negative differences). The problematic servers are linux guests on a XEN host. The time fluctuates on the guest systems, but it is okay in the host itself. I've ruled out ntpd since this happens irregardless of whether ntpd is running or not on the guest systems. Guest is on full virtualisation. The time on both the host and the guest does match except that the time in the guest fluctuates at about a few seconds from the host's time, and the host time does not fluctuate. /proc/sys/xen/independent_wallclock is 0 in the host and does not exist in the guest. Ntpd service was stopped and disabled. Setting independent_wallclock to 1 in the host has no effect (that is, time still fluctuates in the guest). Though I was not able to restart the guest as it is a production server. Might be able to do that over the weekend. Any ideas on what to check and how to resolve this problem?

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