I'm currently running a very simple single-node Cassandra box with the data files on a single disk. I'm about to add a couple of SSDs to the box and intend to add each SSD as another data directory to the cassandra.yaml file. If I stop Cassandra, install the SSD's, move the data files from the (current) mechanical drive to one of the SSDs and then add the SSD directories to the yaml file and then start Cassandra up again, will it automatically start balancing between the two disks? Are there any issues surrounding reconfiguring disk and disk space setup that I should be aware of?
I have a directory that inadvertently had about 1.4 million files generated into it. I want to list just the first, say, 100 items, but without the underlying process trying to read the entire directory contents internally, which causes a very long wait which, at this stage, has been processing for nearly an hour.
How do I do this with Powershell?
Several times a day, SQL Server 2008 takes my server's CPU usage to around 50% constantly and everything starts timing out, which brings my web service to a standstill during that period. Simple queries like select top 10 * from [table_name] time out and even trying to retrieve a table list in the object explorer in Management Studio times out. I can query the sys tables but not being a dba, I'm not sure what to look for. Restarting the SQL Server service solves the problem (obviously?)...
I want to find out what is causing these massive chunks of server-choking usage so that I can correct them and resolve this several-times-daily downtime I have as a result of these timeouts. Any ideas would be much appreciated.
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.
Periodically I notice PowerShell seems to take forever to finish doing whatever it is I told it to do until it occurs to me to "wake it up" by pressing enter. This is not the fault of any one process as best I can tell, as I have even run custom apps that just log their output to the screen every few seconds and even in these cases, PowerShell will stop doing anything after a while until I "give it a kick" by pressing enter.
Any ideas what might be causing this?
I'm using IIS 7 on my own dedicated server. Let's say I have two web applications. One points to folder A, and one points to folder B. The first is used for production and the second is for staging. If I want to set up a scenario whereby I upload my aplication to staging, make sure everybody's happy, then swap the folders that each web application points at, thereby putting "staging" live and making the production environment the new staging environment, what's a good way to do this? I know Microsoft themselves use this methodology on their Azure platform and I've seen it used elsewhere too. How can I do it on my server with IIS7?
I'm trying to test my ASP.Net website on localhost and I'm getting this error:
HTTP Error 401.3 - Unauthorized
You do not have permission to view this directory or page because of
the access control list (ACL) configuration or encryption settings for
this resource on the Web server.
I have the following users on the website application folder, with full read/write permissions:
- NETWORK SERVICE
- IIS_IUSRS
- SYSTEM
- Administrators
- Nathan (me)
What can I try to fix this?