SQL alwaysON - cluster issue
Hi,I have a SQL alwaysON replication setup between on-prem db and Azure SQL db ( IaaS). Today morning my primary DB was not accessible due to cluster issue. Cluster service on one of the node was...
View ArticleNot Able to connect my secondary replicate to test read only
Hello everyone,I have set up two Nodes availability group running on WSFC with file share quorum.when I try to test using sqlcmd with Listener and -K readOnly I will get below...
View ArticleSQL server 2016 Replication issue - The process could not execute...
Hi All,i am facing issue with Transnational replication. there is NO errors in Distributor to Subscriber. seems issue in Publisher to Distributor(Not sure). I can see below errors in REPL monitor,The...
View ArticleRecover data from ldf file
How to retrieve data from ldf file? There is a day older full backup file. I could not attach database because mdf file is not working. Now I need to use the full backup file and ldf file to retrieve...
View ArticleAlwaysOn
Hi,Can anyone assist on query ?If the always on AG group is in resolving state . At cluster level ,the role is in error or missing .Does this needs to be solved at Sql level or Window cluster level...
View ArticleMaximum Allowed Network Link Latency between two data-centers for SQL Always-On
Hi, We are implementing SQL AL-Ways on between two data-centers and looking for network latency requirements. What is maximum allowed network latency for SQL always on group database to keep sync the...
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Always-on : recovery_lsn vs commit_lsn
recovery_lsn : I found it has different sequence (or format ) with another lsn column recovery_lsn : 4294967295429496729500001 last_harden_lsn :38000001549400001And what's the actually meaning of...
View ArticleHow to monitor how many data lag between primary and secondary replica
What's the best way to estimate the data difference between primary and secondary , replica (async)…..??
View Articlesecondary_lag_seconds
for the column secondary_lag_seconds of sys.dm_hadr_database_replica_state:it should be equal to the difference of last_commit_time between primary and secondary replica?
View ArticleGhost Cleanup : Low_water_mark
Seems ghost cleanup is easy to understand. but low_water_mark_for_ghostsof sys.dm_hadr_database_replica_states is hard to understand??what's low_water_mark?
View ArticleConnecting to DB through always-on listener IP is so slow
We have deployed SQL Always-on which is consist of two MS-SQL 2017 servers. When we try to connect through always-on listener IP, the connection takes time and its pretty slow. However, its connecting...
View ArticleReadonly routing to secondary replica
Hi,I have requirement that user should be only connect to secondary replica for read connection through the listener. I tried various options and it didn't work such as disable login on primary...
View ArticleAlwayson Setup (Synchronous Commit) Between Production and DR Site
Hi, The current setup between the production and DR site is asynchronous commit. The two sites are separated over 350 Kilometers but with no network latency and high bandwidth. Can we make the third...
View ArticleReplication in sql server
Dear all,kindly be informed that I want to achieve the next scenario:-I have two nodes(1,2) on always on and I have another node outside the always onI want to do replication between the primary...
View ArticleFailsafe to avoid logins to connect to Primary in Read_Only Routing
Hi,I don't have the servers to test this currently, so posting here. So future config plan is to have read only routing on readable secondaries with connection strings having application intent set to...
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Readable Secondary yes option not available
In the HA group, readable secondary yes option is not available.
View ArticleError While creating Availability Group (Error 19435, 41044)
Dear all,I have a big issue with a new availability group installation/configuration. It does an error and do not create the group...It seems that the group goes online and then is killed by the...
View ArticleTypes(CPU/RAM type) of IaaS required for for replicas and primary node in a...
Types(CPU/RAM type) of IaaS required for for replicas and primary node in a SQL AG?For Basic SQL AG for SQL 2016 Standard version, the replica node (can be a less powerful IaaS- less CPU/RAM)?For SQL...
View ArticleSQL Server Upgrade from SQL Server 2012 to SQL 2017 Failed
Hello, I am doing a SQL Server Upgrade from SQL 2012 to SQL 2017, while I did for two passive (node 3,4) it worked. Interestingly the instance where i setup prevent failback moved to the upgraded node...
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Question related to Alwayson Availability groups
Hi Experts, I have a doubt on Always on Availability groups. While trying to add(i.e. JOIN only) a database to AG. It was throwing below error. I tried to check the backup history of that database....
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