Windows server 2012 r2 standard activation issue 自由
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Ross Smith’s post does a wonderful job of explaining them and how Exchange will take other factors i. disk IO into consideration before invoking the lagged copy. In general, a log play down will occur:. A log “play down” essentially means that Replay Lag Manager is going to force that lagged database copy to catch up on all of the changes to make that copy current. By doing this it ensures that Exchange maintains at least 3 copies of each database. In the real world we don’t always see Exchange setup according to our Preferred Architecture because of environment constraints or business requirements.
There was a recent case that was the best example of Lag Replay Manager working in the real world. The customer had over DB’s, all with 6 copies each. There were 3 copies in the main site and 3 copies in the Disaster Recovery site with one of those copies at each site being lagged.
The DB copies were configured like this for all databases. As you can see in this particular instance the lagged copy at Site A was being forced to play down while the other copy showed a Replay Queue Length RQL of This case was opened due to the fact that the lagged DB copy at Site A was not lagging.
The customer stated that the DB was lagging fine until recently. However, after a quick check of the Replay Queue Length counter in the Daily Performance Logs it didn’t appear to have ever lagged successfully for this copy. So, what we’re seeing is the database has 6 copies, 2 lagged but 1 of those lagged copies isn’t lagging.
Naturally, you may try removing the lag by setting the -ReplayLagTime to 0 then changing back to 7 or what it was before. You may even try recreating the database copy thinking something was wrong with it. These still don’t cause Exchange to lag this copy. The next step is to check if it’s actually the Replay Lag Manager causing the log play down. You can quickly see this by running the following command specifying the lagged DBServer Name.
On this example will use SERVER3 as the server hosting the lagged copy of DB1. Get-MailboxDatabaseCopyStatus DB1SERVER3 Select Id,ReplayLagStatus Id : DB1SERVER3 ReplayLagStatus : Enabled:False; PlayDownReason:LagDisabled; ReplaySuspendReason:None ; Percentage:0; Configured What we see is that the ReplayLagStatus is actually disabled and the PlayDownReason is LagDisabled.
That tells us it’s disabled but it doesn’t really give us more detail as to why.. The first event we encounter is the but it doesn’t give us any more information than the previous command does. com Message: Log Replay for database ‘DB1’ is replaying logs in the replay lag range. Reason: Replay lag has been disabled.
The second event we see has a little more information. At this point we know for sure it’s the Replay Lag Manger because of its FastLagPlaydownDesired status. com Message: Database scanning during passive replay is disabled on ‘DB1’. Explanation: FastLagPlaydownDesired. com Message: Replay Lag Manager suppressed a request to disable replay lag for database copy ‘DB1SERVER3’ after a suppression interval of 1.
Disable Reason: There were database availability check failures for database ‘DB1’ that may be lowering its availability. Availability Count: 3. Expected Availability Count: 3. Detailed error s : SERVER4: Server ‘server4. com’ has database copy auto activation policy configuration of ‘Blocked’. SERVER5: Server ‘server5. SERVER6: Server ‘server6. The “Availability Count: 3. The entire reason for this blog post comes out of the fact that we’ve seen the Replay Lag Manager blamed for not letting a lagged copy lag.
So, the next step someone will do is to disable it. Please don’t do that! It only wants to help! Let’s look at how we can resolve the our above example.
The logs are showing that it’s expecting 3 copies but there aren’t 3 available. How can that be? They have at least 4 copies of this database available?!? If we run the following command we see a hint at culprit. Get-mailboxdatabasecopystatus DB1 Select Identity,AutoActivationPolicy Identity AutoActivationPolicy DB1SERVER1 Unrestricted DB1SERVER2 Unrestricted DB1SERVER3 Unrestricted – Lagged Copy Not lagging DB1SERVER4 Blocked DB1SERVER5 Blocked DB1SERVER6 Blocked – Lagged Copy Working. There it is!
There are 6 database copies, however, the copies in Site B are all blocked due to the AutoActivationPolicy. Now things are starting to make sense. In the eyes of the Replay Lag Manager those copies in Site B are not available because Exchange cannot activate them automatically. So, what’s happening is the Replay Lag Manager only sees the 2 copies in the green square below as available. Therefore, it forces a play down of the logs on the lagged copy to maintain it’s 3 available copies.
That explains why the lagged copy at Site A isn’t lagging but why is the lagged copy at Site B working fine? This is because from the perspective of that database there are 3 available copies in Site A once that lagged copy was played down.
There are essentially two ways to resolve this example and allow that lagged copy at Site A to properly lag. The first way is to revisit the decision to block Auto Activation at Site B. The mindset in this particular instance was that their other site was actually for Disaster Recovery.
They wanted some manual intervention if databases needed to fail over to the DR site. That’s all well and good but it doesn’t allow for a lagged copy at Site A to work properly due to the Replay Lag Manager.
The customer did actually end up allowing 1 copy at the DR site site B in our example for Auto Activation. To do this you can run the following command:. The other option here would be to create another database copy at Site A.
Obviously, that’s going to require a lot more effort and storage. However, doing this would allow for the Replay Lag Manager to resume lagging on the lagged database copy. I hope this post clarifies some things in regards to the Replay Lag Manager. It’s a great feature that will provide some automation in keeping your Exchange databases highly available. Ephemeral port also known as a. Switch Editions? Channel: TechNet Blogs. Mark channel Not-Safe-For-Work? cancel confirm NSFW Votes: 0 votes.
Are you the publisher? Claim or contact us about this channel. Viewing all articles. First Page Page Page Page Page Page Last Page. Browse latest View live. AdminSDHolder: AdminCount: Disable Inheritance: Now to the point of this blog. ps1 The script will pull every object with AdminCount Set to 1 that is not a critical system object do not want to change administrator or krbtgt.
csv — mapping to which objects are members of which privileged group, also provides a date of when admincount was set. ps1 What makes this different is the script looks to see if a users primary group has changed. Resources: Technet Magazine: Overview of AdminSDHolder, protected groups and SDPROP Five common questions about AdminSdHolder and SDProp.
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Fill-In Fields: Name: My-Virtual-LAN Address Space: Now Click “Subnets” on the left side. Fill-In: Name: GatewaySubnet Address Range: Create Virtual Network Gateway In the Azure Portal, Click on Virtual Network Gateway.
Now Click Add. Fill-In Fields: Name: My-Virtual-Gateway Virtual Network: Will Be Network You Created in Previous Step.
Public IP Address: Choose from list or Click Add IP. Gateway Type: VPN VPN Type: Route-Based Location: Same as Above. Click Create. Details required : characters remaining Cancel Submit Replies 1 Bill Smithers Volunteer Moderator Replied on April 28, Hi,. Your question is beyond the scope of these Forums.
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Thanks for your feedback. Choose where you want to search below Search Search the Community. Shabs ZA. vbs -ato then returns this I’ve now had to try call Microsoft phone activation on 4 occasions as their dtmf is broken and does not accept any input from the number pad.
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