I am currently using Unison across 2 computers (server and laptop). I need to create another connection where I can timely backup my data from server.
laptop <--> server -> backup
Here the connection to backup from server can be unidirectional. Is there any way to accomplish this?
This is a very common thing to do. When setting up Unison across multiple machines, you should prefer a star topology. So if you can, you should run another instance of Unison, along with any backup-related scrips, on your machine where you are storing your backups. It should look about the same as your setup on your laptop (depending on where your backups are being stored).
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I'm using Google Compute Instances to run several websites and am looking for a way to automatically backup/snapshot instances that would allow me to rollback in the event of a major error.
Assuming that your servers will restart after a reboot, a snapshot of your VM disks would make it easy to restore to a previous backup, or to clone a server onto a second host if you want to pre-stage some changes before making them live.
We are in position to decide to have 2 sites so when our Main Systems (site1 -- which is Primary location for our businesses) is down, so we have some virtual machines, file servers/file shares, SQL and Exchange in standby on other site (site2 -- secondary location). So we have some sort of backup so we could possibly have whole company up and running so fast we can.
What i want to ask you guys is about "live backup" Servers/file shares.
Do Windows Server have some tools so we can create exactly same copy of file shares on site2. Like fail-over cluster or something? We want that site1 and site2 file shares will communicate and have some sort of contact so when user copy some pictures to Primary file share (//fileshare1), then the secondary fileshare (//fileshare2) or Server, will now that there was been some changes in primary server/fileshare, and it'll copy that picture to site2. Some sort of "live backup" or mirroring.
Do Windows Server have some options like this?
Thanks for all your help!
If you want to use replica of VM as a solution to start replicated VM on the second site during a Disaster Recovery Plan, then this is possible, available in Windows Server (2012 or later) with Hyper-V Replica. This feature has no additional costs, it's included in Windows Server Licence.
This feature allows to replicate VM with a RPO of 30 seconds / 5 minutes or 15 minutes (depending on what you need, your network speed..). VM on recovery site (site 2) are shutdown until you want to use Site 2.
More information on Hyper-V Replica : https://technet.microsoft.com/en-us/library/jj134172%28v=ws.11%29.aspx
More over, in Windows Server 2016 (that will be release in H2 CY16) there is also a feature to replicate a Windows Volume between 2 serveurs (or 2 clusters) : Storage Replica
More information on Storage Replica : https://technet.microsoft.com/en-us/library/mt126104.aspx
Could someone please suggest a tool like phpmemcacheadmin, who allow me to add different redis server and monitor all the stats like del/s, set/s, get/s etc.
I have more than 10 redis server right now for different projects. I want a centralized tool to monitor all these servers. I was going through with phpredmin and php-rb projects but the problem is that i am able to add only 1 server or can add master and his slave.
I would like to setup a free/custom solution to perform failover for VMware ESXi.
The setup is as follows:
2x Physical servers each with independent storage.
For each physical server there are 2x Win2k8 Enterprise servers.
In the case a physical server completely fails, we want the other (for convenience sake we can assign it with a slave role) to resume operation.
For this to occur, we need to somehow do continuous replication of the virtual servers, and in the case of the primary server failing have it take over the IP, start the virtual machines and continue operation.
I am new to VMware ESXi myself, but I am trying to research alternative solutions to the expensive VMware licensing for failover.
Thanks.
Take a look at Veeam Backup & Replication.
We have a number of web-apps running on IIS 6 in a cluster of machines. One of those machines is also a state server for the cluster. We do not use sticky IP's.
When we need to take down the state server machine this requires the entire cluster to be offline for a few minutes while it's switched from one machine to another.
Is there a way to switch a state server from one machine to another with zero downtime?
You could use Velocity, which is a distributed caching technology from Microsoft. You would install the cache on two or more servers. Then you would configure your web app to store session data in the Velocity cache. If you needed to reboot one of your servers, the entire state for your cluster would still be available.
You could use the SQL server option to store state. I've used this in the past and it works well as long as the ASPState table it creates is in memory. I don't know how well it would scale as an on-disk table.
If SQL server is not an option for whatever reason, you could use your load balancer to create a virtual IP for your state server and point it at the new state server when you need to change. There'd be no downtime, but people who are on your site at the time would lose their session state. I don't know what you're using for load balancing, so I don't know how difficult this would be in your environment.