Precision : 2**-18 Root Dispersion : 1.39553 sec Reference Assoc ID : 0 Clock Offset : -0.97009 sec Synchronization Status : Synchronized Peer Dispersion : 0.00000 sec You can also check the status of the NTP service:Īssociations Show the status of NTP associations configured for your system.Īuthentication Show the authentication status. The ibrust setting tells the switch to use burst mode (aggressive polling of the NTP server) as it first tries to sync, and then revert to normal polling after it's locked on to the clock of the NTP server.įinally, we need to enable the NTP service (it's disabled by default since it consumes a bit of resources regardless of if it's syncing the clock or not).Ĭheck your settings so that they actually worked: You can add additional servers as backup servers if you like (NTP can select the best source by itself, so you don't have to prioritise the servers as with SNTP). the server it will check time against first. That'll set the NTP server 192.168.0.10 in the switch config, i.e.
Oobm Use the OOBM interface to connect to the server. Min-poll Configures the minimum time intervals in seconds. Max-poll Configures the maximum time intervals in seconds. Key-id Set the authentication key to use for this server. Iburst Enables initial burst (iburst) mode. IPV6-ADDR The IPv6 address of the server. Server Configure a NTP server to poll for time synchronization. Max-association Maximum number of Network Time Protocol (NTP) associations. I'll paste the console output here so you can see how it's done IRL, and remember that if you hit tab in the middle of a command the switch will give you tips or a list of options:Īuthentication Configure NTP authentication. Then we'll add the settings for which server to query for time. That'll tell the switch to use NTP, so now that we've got that sorted, let's move on to configuring NTP with the "ntp" command.įirst, we'll set the NTP mode to unicast: If they don't support ntp, there won't be an ntp option under timesync.
Changing priority of windows backup and sync update#
Not all switches and software versions support ntp (if not, update the switch to the latest software or use sntp instead, see my other guide in the reference section). That's exactly why 'Preffered Replica' returned 1 for SQLP2 in the first test case.First, we'll set the timesync setting to ntp. In case 'Backup priority' is same for all servers, sql server would like to prefer the top one in the order listed under 'Replica backup prorities'. Very nice article but one important point is missed here: Issue on, if my SQL Server already designed with Always On, can we perform Transaction Log Backup maintenance plan? Because the job is successfully run but we not manage to see the 'Trn Log' file. If you go through the section "Understanding Backup Preferences in AG" in this tip, I think you should find the answer there. plan need to exist and run at the secondary? The backups still will not create BAK nor TRN files although the job is successful. I have "prefer secondary" selected and sql0 (primary) at 25% priority and sql1 (secondary) at 75% priority. Monday, Octo11:36:03 AM - Marykris Hedblom If you create a backup job in Maintenance Plan on the secondary SQL Server instance, I think that should produce the BAK file, but note that the backup needs to be COPY ONLY if ran on the secondary. The backup job that you're trying to create is probably via SSMS using Maintenance Plan? From what you've described, the backup job will not produce any BAK or TRN if the job is ran on the primary as you've set the backup to be allowed on the secondary instead. plan need to exist and run at the secondary? Yes Let’s assume we have an AG configuration like the one below to learn moreĭoes the maint. Replica for backup, then the BACKUP DATABASE command will execute, otherwise theĭatabase backup will be skipped. Is the preferred backup replica for databases in the AG. This is because the Back Up Database Task inĪ Maintenance Plan automatically adds a check to determine if the current replica Preference is set to prefer secondary in the AG, the user database backup will notīe generated on the primary replica when a backup is configured using the Back Upĭatabase Task in a Maintenance Plan. New Availability Group Wizard and use the default configuration.
Preference is set to Prefer Secondary when you setup the AG using the Primary replica or any of the secondary replicas in the AG. SQL Server AlwaysOn Availability Group (AG) allows backups to be taken from the
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